/* ======================================
   HAFIN PAROKKOT PORTFOLIO – style.css
   Premium Dark Theme Portfolio
   ====================================== */

/* ------ CSS Custom Properties ------ */
:root {
  --bg-primary: #040810;
  --bg-secondary: #080e1c;
  --bg-card: #0d1526;
  --bg-card-hover: #111d35;
  --bg-glass: rgba(13, 21, 38, 0.7);

  --accent-primary: #00d4aa;
  --accent-secondary: #f0a500;
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;

  --text-primary: #f0f4ff;
  --text-secondary: #8899bb;
  --text-muted: #4a5a7a;

  --border-subtle: rgba(0, 212, 170, 0.1);
  --border-card: rgba(59, 130, 246, 0.15);

  --glow-primary: rgba(0, 212, 170, 0.15);
  --glow-secondary: rgba(240, 165, 0, 0.12);

  --font-primary: 'Outfit', sans-serif;
  --font-secondary: 'Space Grotesk', sans-serif;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(0, 212, 170, 0.2);

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ------ Reset & Base ------ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea { font-family: inherit; }

/* ------ Custom Cursor ------ */
.cursor {
  width: 12px;
  height: 12px;
  background: var(--accent-primary);
  border-radius: 50%;
  position: fixed;
  top: 0; left: 0;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: transform 0.1s, background 0.3s;
  mix-blend-mode: difference;
}

.cursor-follower {
  width: 36px;
  height: 36px;
  border: 1.5px solid rgba(0, 212, 170, 0.5);
  border-radius: 50%;
  position: fixed;
  top: 0; left: 0;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: transform 0.12s ease, width 0.3s, height 0.3s, opacity 0.3s;
}

@media (hover: none) {
  .cursor, .cursor-follower { display: none; }
}

/* ------ Scrollbar ------ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--accent-primary); border-radius: 3px; }

/* ------ Navbar ------ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 2rem;
  height: 72px;
  display: flex;
  align-items: center;
  transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}

.navbar.scrolled {
  background: rgba(4, 8, 16, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(0, 212, 170, 0.1);
}

.nav-container {
  width: 100%;
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-secondary);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.logo-dot {
  width: 7px;
  height: 7px;
  background: var(--accent-primary);
  border-radius: 50%;
  display: inline-block;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.7; }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  letter-spacing: 0.01em;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
  background: rgba(0, 212, 170, 0.08);
}

.btn-hire {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--bg-primary);
  background: var(--accent-primary);
  padding: 0.55rem 1.25rem;
  border-radius: 50px;
  transition: transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.btn-hire:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(0, 212, 170, 0.5);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  margin-left: auto;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: rgba(4, 8, 16, 0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-slow);
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu ul {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.mobile-link {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-secondary);
  transition: color var(--transition), transform var(--transition);
}

.mobile-link:hover {
  color: var(--accent-primary);
  transform: scale(1.05);
}

/* ------ Buttons ------ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--accent-primary), #00b890);
  color: #040810;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.85rem 1.75rem;
  border-radius: 50px;
  transition: transform var(--transition), box-shadow var(--transition);
  letter-spacing: 0.01em;
}

.btn-primary svg {
  width: 18px; height: 18px;
  transition: transform var(--transition);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0, 212, 170, 0.45);
}

.btn-primary:hover svg {
  transform: translateX(4px);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.85rem 1.75rem;
  border-radius: 50px;
  border: 1.5px solid rgba(255, 255, 255, 0.2);
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
  letter-spacing: 0.01em;
}

.btn-outline:hover {
  border-color: var(--accent-primary);
  background: rgba(0, 212, 170, 0.08);
  transform: translateY(-2px);
}

.btn-cv {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  background: linear-gradient(135deg, var(--accent-secondary), #d48a00);
  color: #040810;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.85rem 1.75rem;
  border-radius: 50px;
  transition: transform var(--transition), box-shadow var(--transition);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.btn-cv svg {
  width: 18px; height: 18px;
  transition: transform var(--transition);
  flex-shrink: 0;
}

.btn-cv:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(240, 165, 0, 0.45);
}

.btn-cv:hover svg {
  transform: translateY(3px);
}

/* ------ Hero Section ------ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0, 212, 170, 0.08) 0%, transparent 70%),
    linear-gradient(180deg, var(--bg-primary) 0%, transparent 30%, transparent 70%, var(--bg-primary) 100%),
    linear-gradient(90deg, var(--bg-primary) 0%, transparent 20%, transparent 80%, var(--bg-primary) 100%);
}

/* Particles */
.particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.hero-orb {
  position: absolute;
  width: 50vw;
  height: 50vw;
  max-width: 600px;
  max-height: 600px;
  background: radial-gradient(circle, rgba(0, 212, 170, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
  transform: translate(-50%, -50%);
  left: 50%;
  top: 50%;
  opacity: 0;
  transition: opacity 1s ease;
  mix-blend-mode: screen;
}

.hero-orb.active {
  opacity: 1;
}

.particle {
  position: absolute;
  border-radius: 50%;
  animation: float-particle linear infinite;
  opacity: 0;
}

@keyframes float-particle {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-100px) scale(1); opacity: 0; }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 2rem;
  padding-top: 100px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(0, 212, 170, 0.1);
  border: 1px solid rgba(0, 212, 170, 0.25);
  color: var(--accent-primary);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.45rem 1rem;
  border-radius: 50px;
  width: fit-content;
  letter-spacing: 0.03em;
}

.tag-dot {
  width: 6px; height: 6px;
  background: var(--accent-primary);
  border-radius: 50%;
  animation: blink 1.5s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-name {
  font-size: clamp(3.5rem, 8vw, 7rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -3px;
  display: flex;
  flex-direction: column;
}

.name-line { display: block; }
.name-line.accent {
  background: linear-gradient(135deg, var(--accent-primary) 0%, #00a878 50%, var(--accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-family: var(--font-secondary);
}

.title-sep {
  color: var(--accent-primary);
  margin: 0 0.3em;
}

.hero-summary {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.8;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 1rem;
  padding: 1.5rem 0;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  letter-spacing: -2px;
}

.stat-suffix {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-primary);
  line-height: 1;
  letter-spacing: -1px;
  display: inline;
  vertical-align: super;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.3rem;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border-subtle);
}

.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--accent-primary), transparent);
  animation: scroll-line 1.5s ease-in-out infinite;
}

@keyframes scroll-line {
  0%, 100% { transform: scaleY(1); opacity: 1; }
  50% { transform: scaleY(0.5); opacity: 0.4; }
}

/* ------ Section Base ------ */
.section {
  padding: 7rem 0;
  position: relative;
}

.container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 1rem;
  position: relative;
  padding: 0 1rem;
}

.section-tag::before,
.section-tag::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 30px;
  height: 1px;
  background: var(--accent-primary);
  opacity: 0.5;
}

.section-tag::before { right: calc(100% - 8px); }
.section-tag::after { left: calc(100% - 8px); }

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  color: var(--text-primary);
}

.section-subtitle {
  margin-top: 1rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* ------ Reveal Animations ------ */
.reveal-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ------ About Section ------ */
.about-section { background: var(--bg-secondary); }

.about-grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 5rem;
  align-items: start;
}

.about-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

/* Outer wrapper — gives the ring room to breathe outside the circle */
.avatar-wrapper {
  position: relative;
  width: 240px;
  height: 240px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Spinning gradient ring fills the wrapper */
.avatar-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(
    var(--accent-primary) 0deg,
    rgba(0, 212, 170, 0.08) 90deg,
    var(--accent-secondary) 200deg,
    rgba(240, 165, 0, 0.08) 300deg,
    var(--accent-primary) 360deg
  );
  animation: rotate-ring 5s linear infinite;
}

/* Inner circle — clips the photo perfectly, sits 10px inside the wrapper */
.avatar-card {
  position: relative;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  overflow: hidden;
  z-index: 1;
  border: 3px solid var(--bg-secondary); /* thin gap between ring and photo */
  flex-shrink: 0;
}

/* Photo fills the card 100% */
.avatar-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
  transition: transform 0.5s ease;
}

.avatar-wrapper:hover .avatar-photo {
  transform: scale(1.07);
}

.about-info-cards {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.info-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.25rem;
  transition: transform var(--transition), border-color var(--transition);
}

.info-card:hover {
  transform: translateX(4px);
  border-color: rgba(0, 212, 170, 0.3);
}

.info-icon { font-size: 1.2rem; flex-shrink: 0; }

.info-card div {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.info-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
}

.info-value {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 500;
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.about-lead {
  font-size: 1.25rem;
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.7;
}

.about-body {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.about-languages h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-weight: 600;
}

.lang-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.lang-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  transition: transform var(--transition), border-color var(--transition);
}

.lang-item:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 212, 170, 0.2);
}

.lang-flag { font-size: 1.3rem; }

.lang-info {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.lang-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.lang-level {
  font-size: 0.72rem;
  font-weight: 500;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  width: fit-content;
}

.lang-level.native { background: rgba(0, 212, 170, 0.15); color: var(--accent-primary); }
.lang-level.advanced { background: rgba(59, 130, 246, 0.15); color: var(--accent-blue); }
.lang-level.proficient { background: rgba(139, 92, 246, 0.15); color: var(--accent-purple); }
.lang-level.basic { background: rgba(240, 165, 0, 0.15); color: var(--accent-secondary); }

.about-cta { margin-top: 0; }

.about-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}

/* ------ Experience Section ------ */
.experience-section { background: var(--bg-primary); }

.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-primary), rgba(0, 212, 170, 0.1));
}

.timeline-item {
  position: relative;
  padding: 0 0 3.5rem 3rem;
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.timeline-item.visible {
  opacity: 1;
  transform: translateX(0);
}

.timeline-dot {
  position: absolute;
  left: -2.25rem;
  top: 6px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--accent-primary);
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

.timeline-item:hover .timeline-dot {
  transform: scale(1.2);
  box-shadow: 0 0 16px rgba(0, 212, 170, 0.5);
}

.dot-inner {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-primary);
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.timeline-item:hover .timeline-content {
  border-color: rgba(0, 212, 170, 0.3);
  transform: translateX(6px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.exp-header { margin-bottom: 1.25rem; }

.exp-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
  flex-wrap: wrap;
}

.exp-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
}

.exp-badge.current {
  background: rgba(0, 212, 170, 0.15);
  color: var(--accent-primary);
  border: 1px solid rgba(0, 212, 170, 0.3);
  animation: pulse-badge 2s ease-in-out infinite;
}

@keyframes pulse-badge {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 212, 170, 0.3); }
  50% { box-shadow: 0 0 0 6px rgba(0, 212, 170, 0); }
}

.exp-date {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: var(--font-secondary);
  font-weight: 500;
}

.exp-role {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
  margin-bottom: 0.5rem;
}

.exp-company {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  color: var(--accent-primary);
  font-weight: 500;
}

.company-icon { font-size: 1rem; }

.exp-bullets {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.exp-bullets li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.exp-bullets li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-size: 0.85rem;
}

.exp-bullets li strong { color: var(--text-primary); font-weight: 600; }

/* ------ Education Section ------ */
.education-section { background: var(--bg-secondary); }

.edu-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.edu-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  opacity: 0;
  transition: opacity var(--transition);
}

.edu-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 212, 170, 0.3);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.edu-card:hover::before { opacity: 1; }

.edu-icon { font-size: 2.5rem; }

.edu-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-secondary);
  background: rgba(240, 165, 0, 0.1);
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
  margin-bottom: 0.25rem;
}

.edu-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
}

.edu-inst {
  font-size: 0.88rem;
  color: var(--accent-primary);
  font-weight: 500;
}

.edu-meta {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.edu-grade {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  margin-top: auto;
}

.grade-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.grade-value {
  font-size: 1.75rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
}

/* ------ Skills Section ------ */
.skills-section { background: var(--bg-primary); }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color var(--transition);
}

.skill-category:hover {
  border-color: rgba(0, 212, 170, 0.25);
}

.skill-cat-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.skill-cat-icon { font-size: 1.5rem; }

.skill-cat-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.skill-tag {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.4rem 0.9rem;
  border-radius: 50px;
  transition: color var(--transition), background var(--transition), border-color var(--transition), transform var(--transition);
  cursor: default;
}

.skill-tag:hover {
  color: var(--accent-primary);
  background: rgba(0, 212, 170, 0.08);
  border-color: rgba(0, 212, 170, 0.3);
  transform: translateY(-2px);
}

.skill-tag.highlight {
  color: var(--accent-primary);
  background: rgba(0, 212, 170, 0.08);
  border-color: rgba(0, 212, 170, 0.2);
  font-weight: 600;
}

/* ------ Projects Section ------ */
.projects-section { background: var(--bg-secondary); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 212, 170, 0.35);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

.project-card.featured {
  border-color: rgba(0, 212, 170, 0.2);
}

.project-glow {
  position: absolute;
  top: -60px; right: -60px;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 170, 0.08), transparent 70%);
  pointer-events: none;
}

.project-tag-top {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-secondary);
}

.project-icon { font-size: 2.5rem; }

.project-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
}

.project-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

.project-techs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
}

.project-techs span {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent-primary);
  background: rgba(0, 212, 170, 0.08);
  border: 1px solid rgba(0, 212, 170, 0.15);
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
}

/* Publications */
.publications { margin-top: 1rem; }

.pub-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.pub-card {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color var(--transition), transform var(--transition);
}

.pub-card:hover {
  border-color: rgba(0, 212, 170, 0.3);
  transform: translateY(-3px);
}

.pub-icon { font-size: 2.5rem; flex-shrink: 0; }

.pub-body { flex: 1; }

.pub-body h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 0.4rem;
}

.pub-link {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

.pub-link:hover {
  color: var(--accent-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.pub-body p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.pub-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.pub-journal, .pub-date, .pub-role {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
}

.pub-journal {
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue);
}

.pub-date {
  background: rgba(139, 92, 246, 0.15);
  color: var(--accent-purple);
}

.pub-role {
  background: rgba(0, 212, 170, 0.1);
  color: var(--accent-primary);
}

/* ------ Certificates Section ------ */
.certificates-section { background: var(--bg-primary); }

.certs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.cert-card {
  position: relative;
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.25rem 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  cursor: default;
}

.cert-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 212, 170, 0.3);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

/* Shimmer sweep on hover */
.cert-shimmer {
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.04) 50%, transparent 60%);
  background-size: 200% 100%;
  background-position: 200% 0;
  transition: background-position 0.6s ease;
  pointer-events: none;
}
.cert-card:hover .cert-shimmer {
  background-position: -200% 0;
}

/* Top row: logo + level badge */
.cert-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

/* Issuer logo block */
.cert-issuer-logo {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  flex-shrink: 0;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}
.cert-issuer-logo svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* Level / type badge */
.cert-level-badge {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 50px;
  white-space: nowrap;
}

.level-4   { background: rgba(0, 87, 168, 0.2);  color: #60a5fa; border: 1px solid rgba(0,87,168,0.4); }
.level-3   { background: rgba(0, 87, 168, 0.15); color: #93c5fd; border: 1px solid rgba(0,87,168,0.3); }
.level-pro { background: rgba(0, 91, 150, 0.2);  color: #7ec8f0; border: 1px solid rgba(0,91,150,0.4); }
.level-gov { background: rgba(0, 112, 60, 0.2);  color: #6ee7b7; border: 1px solid rgba(0,112,60,0.4); }
.level-govt-in { background: rgba(46,125,50,0.2); color: #86efac; border: 1px solid rgba(46,125,50,0.4); }
.level-lang    { background: rgba(29, 32, 136,0.25); color: #a5b4fc; border: 1px solid rgba(29,32,136,0.5); }
.level-online  { background: rgba(232,119,34,0.18); color: #fdba74; border: 1px solid rgba(232,119,34,0.35); }
.level-biz     { background: rgba(92,61,153,0.2);  color: #c4b5fd; border: 1px solid rgba(92,61,153,0.4); }
.level-ai      { background: rgba(0,212,170,0.12);  color: #00d4aa; border: 1px solid rgba(0,212,170,0.25); }
.level-med     { background: rgba(198,40,40,0.2);   color: #fca5a5; border: 1px solid rgba(198,40,40,0.4); }
.level-ncc     { background: rgba(62,87,40,0.25);   color: #bbf7d0; border: 1px solid rgba(62,87,40,0.5); }
.level-comp    { background: rgba(180,83,9,0.2);    color: #fcd34d; border: 1px solid rgba(180,83,9,0.4); }

/* Card body: issuer → title → sub */
.cert-body {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.cert-issuer-name {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  opacity: 0.85;
}

.cert-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
}

.cert-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ------ Achievements Section ------ */
.achievements-section { background: var(--bg-secondary); }

.ach-org-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.sub-section-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.ach-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.ach-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.ach-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-primary);
  flex-shrink: 0;
  margin-top: 0.45rem;
}

.ach-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.ach-text strong {
  color: var(--text-primary);
}

.org-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.org-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  transition: transform var(--transition), border-color var(--transition);
}

.org-card:hover {
  transform: translateX(4px);
  border-color: rgba(0, 212, 170, 0.25);
}

.org-icon { font-size: 1.4rem; flex-shrink: 0; }

.org-card div {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.org-card strong {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 600;
}

.org-card span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.visits-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.visit-tag {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  padding: 0.4rem 0.85rem;
  border-radius: 50px;
  transition: color var(--transition), border-color var(--transition);
}

.visit-tag:hover {
  color: var(--accent-primary);
  border-color: rgba(0, 212, 170, 0.3);
}

/* ------ Global Gallery Section ------ */
.gallery-section {
  overflow: hidden;
  padding-bottom: 5rem;
}

.marquee-container {
  width: 100vw;
  max-width: 100%;
  overflow: hidden;
  display: flex;
  position: relative;
  left: 50%;
  transform: translateX(-50%);
}

.marquee-track {
  display: flex;
  width: max-content;
  gap: 1.25rem;
  padding: 0 0.625rem;
  white-space: nowrap;
}

.track-left {
  animation: marquee-left 45s linear infinite;
}

.track-right {
  animation: marquee-right 45s linear infinite;
}

.marquee-container:hover .marquee-track {
  animation-play-state: paused;
}

.gallery-marquee-img {
  height: 220px;
  width: auto;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 15px rgba(0,0,0,0.15);
  transition: transform 0.3s ease, filter 0.3s ease;
  filter: grayscale(15%);
  cursor: pointer;
  flex-shrink: 0;
}

.gallery-marquee-img:hover {
  transform: scale(1.02);
  filter: grayscale(0%);
}

@keyframes marquee-left {
  0% { transform: translateX(0); }
  100% { transform: translateX(calc(-50% - 0.625rem)); }
}

@keyframes marquee-right {
  0% { transform: translateX(calc(-50% - 0.625rem)); }
  100% { transform: translateX(0); }
}

@media (max-width: 768px) {
  .gallery-marquee-img {
    height: 150px;
  }
  .track-left, .track-right {
    animation-duration: 35s;
  }
}

/* ------ Contact Section ------ */
.contact-section { background: var(--bg-primary); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 4rem;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.contact-card:not(.static):hover {
  transform: translateX(6px);
  border-color: rgba(0, 212, 170, 0.3);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.contact-card-icon { font-size: 1.6rem; flex-shrink: 0; }

.contact-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.contact-card-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
}

.contact-card-value {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
}

.contact-arrow {
  width: 18px; height: 18px;
  color: var(--text-muted);
  transition: color var(--transition), transform var(--transition);
  flex-shrink: 0;
}

.contact-card:hover .contact-arrow {
  color: var(--accent-primary);
  transform: translateX(3px);
}

/* Contact Form */
.contact-form-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.form-group input,
.form-group textarea {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.1rem;
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
  outline: none;
  width: 100%;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: rgba(0, 212, 170, 0.4);
  box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.08);
}

.form-submit {
  width: 100%;
  justify-content: center;
  padding: 1rem;
  font-size: 1rem;
}

.form-success {
  font-size: 0.9rem;
  color: var(--accent-primary);
  text-align: center;
  padding: 0.75rem;
  background: rgba(0, 212, 170, 0.08);
  border: 1px solid rgba(0, 212, 170, 0.2);
  border-radius: var(--radius-md);
  display: none;
}

.form-error {
  font-size: 0.9rem;
  color: #f87171;
  text-align: center;
  padding: 0.75rem;
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.25);
  border-radius: var(--radius-md);
  display: none;
}

.form-error a {
  color: #f87171;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ------ Footer ------ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 3rem 0 2rem;
}

.footer-container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 2rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 1.5rem;
}

.footer-brand {}

.footer-logo {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--text-primary);
  font-family: var(--font-secondary);
  display: block;
  margin-bottom: 0.4rem;
}

.footer-dot { color: var(--accent-primary); }

.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: center;
}

.footer-links a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--accent-primary); }

.footer-social {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
}

.social-btn {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
}

.social-btn svg { width: 18px; height: 18px; }

.social-btn:hover {
  background: rgba(0, 212, 170, 0.1);
  border-color: rgba(0, 212, 170, 0.3);
  color: var(--accent-primary);
  transform: translateY(-3px);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-craft { font-style: italic; }

/* ------ Back to Top ------ */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-primary);
  color: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(0, 212, 170, 0.4);
  z-index: 500;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition), transform var(--transition);
  pointer-events: none;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 212, 170, 0.6);
}

.back-to-top svg { width: 20px; height: 20px; }

/* ------ Responsive ------ */
@media (max-width: 1100px) {
  .about-grid {
    grid-template-columns: 300px 1fr;
    gap: 3rem;
  }
  .edu-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .certs-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .nav-links { display: none; }
  .btn-hire { display: none; }
  .hamburger { display: flex; }

  .about-grid { grid-template-columns: 1fr; }
  .about-visual { flex-direction: row; align-items: flex-start; flex-wrap: wrap; }
  .edu-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .ach-org-grid { grid-template-columns: 1fr; gap: 2rem; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-social { justify-content: flex-start; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .lang-grid { grid-template-columns: 1fr; }
}

@media (max-width: 700px) {
  .section { padding: 5rem 0; }
  .hero-name { letter-spacing: -2px; }
  .projects-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 1.25rem; }
  .timeline { padding-left: 1rem; }
  .timeline-item { padding-left: 2rem; }
  .timeline::before { left: 7px; }
  .timeline-dot { left: -1.75rem; }
  .pub-card { flex-direction: column; }
  .about-visual { flex-direction: column; align-items: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 1.25rem; }
  .navbar { padding: 0 1.25rem; }
  .hero-content { padding: 0 1.25rem; padding-top: 90px; }
  .hero-ctas { flex-direction: column; align-items: center; }
  .btn-primary, .btn-outline, .btn-cv, .btn-linkedin { width: 100%; justify-content: center; }
  .contact-form-wrap { padding: 1.5rem; }
}

/* ------ LinkedIn Button (#2) ------ */
.btn-linkedin {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  background: #0077b5;
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.85rem 1.5rem;
  border-radius: 50px;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.btn-linkedin svg {
  width: 18px; height: 18px;
  flex-shrink: 0;
}

.btn-linkedin:hover {
  background: #005f93;
  transform: translateY(-3px);
  box-shadow: 0 12px 35px rgba(0, 119, 181, 0.45);
}

/* ------ Active Nav Link Indicator (#13) ------ */
.nav-link.active {
  color: var(--accent-primary) !important;
  background: rgba(0, 212, 170, 0.12) !important;
  position: relative;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 2px;
  background: var(--accent-primary);
  border-radius: 2px;
}

/* ------ Testimonials Section (#12) ------ */
.testimonials-section {
  background: var(--bg-secondary);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 2rem 2rem 1.75rem;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  overflow: hidden;
}

.testimonial-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  opacity: 0;
  transition: opacity var(--transition);
}

.testimonial-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 212, 170, 0.3);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(0, 212, 170, 0.15);
}

.testimonial-card:hover::before {
  opacity: 1;
}

.testimonial-quote {
  font-size: 4rem;
  line-height: 1;
  color: var(--accent-primary);
  opacity: 0.35;
  font-family: Georgia, serif;
  margin-bottom: -0.5rem;
  margin-top: -0.5rem;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.85;
  flex: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
}

.testimonial-avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--bg-primary);
  flex-shrink: 0;
  letter-spacing: 0.5px;
}

.testimonial-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.testimonial-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.testimonial-role {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.01em;
}

/* Responsive: Testimonials */
@media (max-width: 900px) {
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
}

/* ======================================
   IMPROVEMENT ADDITIONS
   ====================================== */

/* ------ Skip Link (Accessibility) ------ */
.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 10000;
  background: var(--accent-primary);
  color: var(--bg-primary);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.9rem;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 1rem;
}

/* ------ Typewriter Effect ------ */
.typewriter {
  display: inline;
}
.typewriter-cursor {
  display: inline-block;
  margin-left: 2px;
  font-weight: 300;
  color: var(--accent-primary);
  animation: blink-cursor 0.75s step-end infinite;
  font-size: 0.85em;
}
@keyframes blink-cursor {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ------ Theme Toggle Button ------ */
.theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  border: 1px solid var(--border-card);
  background: transparent;
  transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition);
  flex-shrink: 0;
}
.theme-toggle svg {
  width: 18px;
  height: 18px;
  transition: opacity 0.3s, transform 0.3s;
}
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
.theme-toggle:hover {
  color: var(--accent-primary);
  border-color: rgba(0, 212, 170, 0.35);
  background: rgba(0, 212, 170, 0.06);
  transform: rotate(20deg);
}
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* ------ Light Mode ------ */
[data-theme="light"] {
  --bg-primary: #f4f1ec;
  --bg-secondary: #ece8e1;
  --bg-card: #ffffff;
  --bg-card-hover: #f7f5f1;
  --bg-glass: rgba(255, 255, 255, 0.75);

  --text-primary: #1a1e2e;
  --text-secondary: #4a5068;
  --text-muted: #8a91a8;

  --border-subtle: rgba(0, 168, 132, 0.15);
  --border-card: rgba(0, 160, 124, 0.18);

  --glow-primary: rgba(0, 168, 132, 0.12);
  --glow-secondary: rgba(200, 120, 0, 0.1);

  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 40px rgba(0, 168, 132, 0.15);
}
[data-theme="light"] body {
  background: var(--bg-primary);
  color: var(--text-primary);
}
[data-theme="light"] .navbar.scrolled {
  background: rgba(244, 241, 236, 0.9);
  box-shadow: 0 1px 0 rgba(0, 168, 132, 0.12);
}
[data-theme="light"] .hero-bg-img {
  opacity: 0.12;
}
[data-theme="light"] .hero-overlay {
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0, 168, 132, 0.07) 0%, transparent 70%),
    linear-gradient(180deg, var(--bg-primary) 0%, transparent 25%, transparent 75%, var(--bg-primary) 100%),
    linear-gradient(90deg, var(--bg-primary) 0%, transparent 15%, transparent 85%, var(--bg-primary) 100%);
}
[data-theme="light"] .mobile-menu {
  background: rgba(244, 241, 236, 0.98);
}
[data-theme="light"] .hero-content {
  background: rgba(244, 241, 236, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.65);
}
[data-theme="light"] .form-group input,
[data-theme="light"] .form-group textarea {
  background: rgba(0, 0, 0, 0.03);
  border-color: rgba(0, 0, 0, 0.12);
  color: var(--text-primary);
}
[data-theme="light"] .form-group input:focus,
[data-theme="light"] .form-group textarea:focus {
  border-color: rgba(0, 168, 132, 0.5);
  box-shadow: 0 0 0 3px rgba(0, 168, 132, 0.1);
}
[data-theme="light"] ::-webkit-scrollbar-track { background: var(--bg-secondary); }
[data-theme="light"] ::-webkit-scrollbar-thumb { background: var(--accent-primary); }

/* ------ Glassmorphism Hero Content Panel ------ */
.hero-content {
  background: rgba(4, 8, 16, 0.25);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.04);
  padding: 3rem 3rem 2.5rem !important;
  max-width: 860px !important;
}
@media (max-width: 700px) {
  .hero-content {
    padding: 2rem 1.5rem !important;
  }
}

/* ------ Timeline Pulse Animation ------ */
@keyframes timeline-pulse {
  0% { opacity: 1; }
  50% { opacity: 0.55; }
  100% { opacity: 1; }
}
.timeline::before {
  animation: timeline-pulse 2.5s ease-in-out infinite;
}

/* ------ Footer Gradient Glow ------ */
.footer {
  position: relative;
}
.footer::before {
  content: '';
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 200px;
  background: radial-gradient(ellipse, rgba(0, 212, 170, 0.07) 0%, transparent 70%);
  pointer-events: none;
  border-radius: 50%;
}

/* ------ Certificate Filter Tabs ------ */
.cert-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2.5rem;
  justify-content: center;
}
.cert-filter {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border: 1.5px solid var(--border-card);
  padding: 0.5rem 1.2rem;
  border-radius: 50px;
  cursor: pointer;
  transition: color var(--transition), background var(--transition), border-color var(--transition), transform var(--transition);
  font-family: var(--font-primary);
  letter-spacing: 0.02em;
}
.cert-filter:hover {
  color: var(--accent-primary);
  border-color: rgba(0, 212, 170, 0.4);
  background: rgba(0, 212, 170, 0.05);
  transform: translateY(-2px);
}
.cert-filter.active {
  color: var(--bg-primary);
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  box-shadow: 0 4px 16px rgba(0, 212, 170, 0.35);
}
.cert-card.cert-hidden {
  display: none;
}

/* ------ Section Gradient Mesh Backgrounds ------ */
.about-section {
  background-image:
    radial-gradient(ellipse 60% 40% at 90% 10%, rgba(0, 212, 170, 0.04) 0%, transparent 60%),
    radial-gradient(ellipse 40% 30% at 10% 80%, rgba(59, 130, 246, 0.03) 0%, transparent 50%);
}
.skills-section {
  background-image:
    radial-gradient(ellipse 50% 40% at 20% 30%, rgba(139, 92, 246, 0.04) 0%, transparent 60%),
    radial-gradient(ellipse 40% 30% at 80% 70%, rgba(0, 212, 170, 0.03) 0%, transparent 50%);
}
.certificates-section {
  background-image:
    radial-gradient(ellipse 60% 50% at 50% 0%, rgba(59, 130, 246, 0.03) 0%, transparent 60%);
}

/* ======================================
   EXPERIENCE PHOTO MODAL / LIGHTBOX
   ====================================== */

/* -- View Photos Button -- */
.exp-view-photos-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding: 9px 18px;
  background: rgba(0, 212, 170, 0.08);
  border: 1px solid rgba(0, 212, 170, 0.3);
  border-radius: var(--radius-sm);
  color: var(--accent-primary);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-primary);
}
.exp-view-photos-btn:hover {
  background: rgba(0, 212, 170, 0.18);
  border-color: var(--accent-primary);
  box-shadow: 0 0 20px rgba(0, 212, 170, 0.2);
  transform: translateY(-1px);
}
.exp-view-photos-btn svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  transition: transform var(--transition);
}
.exp-view-photos-btn:hover svg {
  transform: scale(1.15);
}
.exp-photo-count {
  background: rgba(0, 212, 170, 0.15);
  border-radius: 20px;
  padding: 2px 8px;
  font-size: 0.72rem;
}

/* -- Modal Overlay -- */
.photo-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(4, 8, 16, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}
.photo-modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* -- Modal Box -- */
.photo-modal {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 860px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(30px) scale(0.96);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.7), 0 0 60px rgba(0, 212, 170, 0.07);
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 212, 170, 0.3) transparent;
}
.photo-modal-overlay.active .photo-modal {
  transform: translateY(0) scale(1);
}
.photo-modal::-webkit-scrollbar { width: 5px; }
.photo-modal::-webkit-scrollbar-track { background: transparent; }
.photo-modal::-webkit-scrollbar-thumb { background: rgba(0, 212, 170, 0.3); border-radius: 10px; }

/* -- Modal Header -- */
.photo-modal-header {
  padding: 28px 32px 20px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  position: sticky;
  top: 0;
  background: var(--bg-card);
  z-index: 2;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.photo-modal-company {
  display: flex;
  align-items: center;
  gap: 12px;
}
.photo-modal-company-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(0, 212, 170, 0.1);
  border: 1px solid rgba(0, 212, 170, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.photo-modal-company-info { flex: 1; }
.photo-modal-company-info h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}
.photo-modal-company-info p {
  font-size: 0.8rem;
  color: var(--accent-primary);
  font-weight: 500;
  margin-top: 2px;
}
.photo-modal-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
  color: var(--text-secondary);
}
.photo-modal-close:hover {
  background: rgba(240, 80, 80, 0.15);
  border-color: rgba(240, 80, 80, 0.3);
  color: #f05050;
  transform: rotate(90deg);
}
.photo-modal-close svg { width: 16px; height: 16px; }

/* -- Modal Body -- */
.photo-modal-body {
  padding: 28px 32px 32px;
}

/* -- Gallery Grid -- */
.photo-gallery {
  display: grid;
  gap: 12px;
  margin-bottom: 28px;
}
.photo-gallery.count-1 {
  grid-template-columns: 1fr;
}
.photo-gallery.count-2 {
  grid-template-columns: 1fr 1fr;
}
.photo-gallery.count-3 {
  grid-template-columns: 1fr 1fr;
}
.photo-gallery.count-3 .gallery-item:first-child {
  grid-column: 1 / -1;
}
.photo-gallery.count-4 {
  grid-template-columns: 1fr 1fr;
}
.photo-gallery.count-5,
.photo-gallery.count-6,
.photo-gallery.count-7,
.photo-gallery.count-8 {
  grid-template-columns: repeat(3, 1fr);
}
.photo-gallery.count-5 .gallery-item:first-child,
.photo-gallery.count-7 .gallery-item:first-child {
  grid-column: 1 / span 2;
}
.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-secondary);
  cursor: zoom-in;
  group: photo;
  aspect-ratio: 4/3;
}
.photo-gallery.count-1 .gallery-item {
  aspect-ratio: 16/9;
  max-height: 420px;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.45s ease;
}
.gallery-item:hover img { transform: scale(1.04); }
.gallery-item-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s ease;
}
.gallery-item:hover .gallery-item-overlay {
  background: rgba(0, 212, 170, 0.12);
}
.gallery-item-overlay svg {
  opacity: 0;
  transform: scale(0.7);
  transition: opacity 0.3s ease, transform 0.3s ease;
  color: white;
  width: 32px;
  height: 32px;
}
.gallery-item:hover .gallery-item-overlay svg {
  opacity: 1;
  transform: scale(1);
}

/* -- Moment Separator (multiple moments per modal) -- */
.photo-modal-moment-block {
  margin-bottom: 32px;
}
.photo-modal-moment-block:last-child {
  margin-bottom: 0;
}
.photo-modal-moment-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.photo-modal-moment-title .moment-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(0, 212, 170, 0.12);
  border: 1px solid rgba(0, 212, 170, 0.3);
  color: var(--accent-primary);
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.photo-modal-moment-title h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}
.photo-modal-moment-title .moment-tag {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-top: 1px;
}
.photo-modal-divider {
  height: 1px;
  background: linear-gradient(90deg, rgba(0,212,170,0.2) 0%, transparent 100%);
  margin: 28px 0;
}

/* -- Moment / Description -- */
.photo-modal-moment {
  background: rgba(0, 212, 170, 0.04);
  border: 1px solid rgba(0, 212, 170, 0.12);
  border-left: 3px solid var(--accent-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 20px 24px;
}
.photo-modal-moment-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.photo-modal-moment-label::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-primary);
  flex-shrink: 0;
}
.photo-modal-moment p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.75;
}
.photo-modal-moment p + p {
  margin-top: 10px;
}
.photo-modal-moment strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* -- Credit line -- */
.photo-modal-credit {
  margin-top: 14px;
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.photo-modal-credit span { color: var(--accent-secondary); font-weight: 500; }

/* -- Fullscreen lightbox -- */
.photo-lightbox {
  position: fixed;
  inset: 0;
  z-index: 20000;
  background: rgba(0, 0, 0, 0.96);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  padding: 20px;
}
.photo-lightbox.active {
  opacity: 1;
  visibility: visible;
}
.photo-lightbox img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
  transform: scale(0.9);
  transition: transform 0.3s ease;
}
.photo-lightbox.active img { transform: scale(1); }
.photo-lightbox-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: white;
  transition: var(--transition);
}
.photo-lightbox-close:hover {
  background: rgba(240, 80, 80, 0.2);
  transform: rotate(90deg);
}
.photo-lightbox-close svg { width: 20px; height: 20px; }

/* -- Responsive -- */
@media (max-width: 600px) {
  .photo-modal-header { padding: 20px; }
  .photo-modal-body { padding: 20px; }
  .photo-gallery.count-2,
  .photo-gallery.count-3,
  .photo-gallery.count-4 {
    grid-template-columns: 1fr;
  }
  .photo-gallery.count-3 .gallery-item:first-child {
    grid-column: 1;
  }
  .photo-modal { border-radius: var(--radius-md); }
}