/* ============================================================
   ANSLIN MALAR E — PORTFOLIO STYLESHEET
   Clean, elegant, professional ECE student portfolio
   ============================================================ */

/* ── CSS Custom Properties (Tokens) ── */
:root {
  /* Colors */
  --clr-primary: #2563eb;
  --clr-primary-light: #3b82f6;
  --clr-primary-dark: #1d4ed8;
  --clr-primary-muted: #dbeafe;
  --clr-primary-subtle: #eff6ff;

  --clr-accent: #0ea5e9;
  --clr-accent-light: #38bdf8;

  /* Neutrals */
  --clr-bg: #f8fafc;
  --clr-bg-alt: #f1f5f9;
  --clr-surface: #ffffff;
  --clr-surface-2: #f8fafc;
  --clr-border: #e2e8f0;
  --clr-border-light: #f1f5f9;

  /* Text */
  --clr-text: #0f172a;
  --clr-text-secondary: #475569;
  --clr-text-muted: #94a3b8;
  --clr-text-light: #cbd5e1;

  /* Navbar */
  --clr-nav-bg: rgba(255, 255, 255, 0.92);
  --clr-nav-border: rgba(226, 232, 240, 0.8);

  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-shadow: 0 8px 32px rgba(37, 99, 235, 0.08);

  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Outfit', 'Inter', sans-serif;

  /* Sizing */
  --container-max: 1180px;
  --section-padding: 96px 0;
  --border-radius: 16px;
  --border-radius-sm: 10px;
  --border-radius-lg: 24px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08), 0 2px 6px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.1), 0 4px 12px rgba(15, 23, 42, 0.06);
  --shadow-card: 0 2px 12px rgba(37, 99, 235, 0.06), 0 1px 4px rgba(15, 23, 42, 0.04);

  /* Transitions */
  --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Gradient */
  --gradient-primary: linear-gradient(135deg, #2563eb 0%, #0ea5e9 100%);
  --gradient-hero: linear-gradient(135deg, #eff6ff 0%, #f0f9ff 50%, #fafafa 100%);
  --gradient-section: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

/* ── Dark Mode ── */
[data-theme="dark"] {
  --clr-bg: #0b1222;
  --clr-bg-alt: #111827;
  --clr-surface: #131e30;
  --clr-surface-2: #1a2540;
  --clr-border: #1e2d45;
  --clr-border-light: #1a2540;

  --clr-text: #f1f5f9;
  --clr-text-secondary: #94a3b8;
  --clr-text-muted: #64748b;
  --clr-text-light: #334155;

  --clr-nav-bg: rgba(11, 18, 34, 0.92);
  --clr-nav-border: rgba(30, 45, 69, 0.8);

  --glass-bg: rgba(19, 30, 48, 0.72);
  --glass-border: rgba(30, 58, 100, 0.4);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);

  --clr-primary-muted: #1e3a5f;
  --clr-primary-subtle: #162035;

  --gradient-hero: linear-gradient(135deg, #0b1222 0%, #0f1e35 50%, #0b1222 100%);
  --gradient-section: linear-gradient(180deg, #0b1222 0%, #111827 100%);
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.3), 0 1px 4px rgba(0, 0, 0, 0.2);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--clr-text);
  background-color: var(--clr-bg);
  line-height: 1.65;
  transition: background-color var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul { list-style: none; }

button {
  font-family: var(--font-body);
  cursor: pointer;
  border: none;
  background: none;
}

/* ── Container ── */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Section ── */
.section {
  padding: var(--section-padding);
}

/* ── Section Header ── */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-primary);
  background: var(--clr-primary-muted);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--clr-text);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  line-height: 1.2;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--clr-text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── Glass Card ── */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.2);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 100px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(37, 99, 235, 0.4);
  color: #fff;
}

.btn-secondary {
  background: var(--clr-surface);
  color: var(--clr-primary);
  border: 1.5px solid var(--clr-border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--clr-primary-subtle);
  border-color: var(--clr-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ── Animations ── */
.fade-up {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-left {
  opacity: 0;
  transform: translateX(-36px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-right {
  opacity: 0;
  transform: translateX(36px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-up.in-view,
.fade-left.in-view,
.fade-right.in-view {
  opacity: 1;
  transform: none;
}

/* Staggered delays */
.timeline-item:nth-child(1) .fade-up,
.fade-up:nth-child(1) { transition-delay: 0s; }
.timeline-item:nth-child(2) .fade-up,
.fade-up:nth-child(2) { transition-delay: 0.1s; }
.fade-up:nth-child(3) { transition-delay: 0.2s; }
.fade-up:nth-child(4) { transition-delay: 0.3s; }
.fade-up:nth-child(5) { transition-delay: 0.4s; }

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--clr-nav-bg);
  border-bottom: 1px solid var(--clr-nav-border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: all var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--clr-text);
  letter-spacing: -0.02em;
}

.brand-dot {
  color: var(--clr-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--clr-text-secondary);
  padding: 8px 14px;
  border-radius: 8px;
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--clr-primary);
  background: var(--clr-primary-subtle);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  color: var(--clr-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  color: var(--clr-primary);
  border-color: var(--clr-primary-light);
  background: var(--clr-primary-subtle);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--clr-border);
  background: var(--clr-surface);
}

.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--clr-text-secondary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition);
  border-top: 1px solid transparent;
}

.mobile-menu.open {
  max-height: 400px;
  border-top-color: var(--clr-border);
}

.mobile-menu ul {
  padding: 12px 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-link {
  display: block;
  padding: 10px 16px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--clr-text-secondary);
  transition: all var(--transition-fast);
}

.mobile-link:hover {
  color: var(--clr-primary);
  background: var(--clr-primary-subtle);
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
  padding-top: 68px;
}

.hero-bg-decor {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.circle {
  position: absolute;
  border-radius: 50%;
  opacity: 0.06;
}

.circle-1 {
  width: 600px;
  height: 600px;
  background: var(--clr-primary);
  top: -200px;
  right: -100px;
}

.circle-2 {
  width: 400px;
  height: 400px;
  background: var(--clr-accent);
  bottom: -150px;
  left: -80px;
}

.circle-3 {
  width: 250px;
  height: 250px;
  background: var(--clr-primary-dark);
  top: 30%;
  left: 30%;
  opacity: 0.04;
}

.grid-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37, 99, 235, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 80px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
  width: 100%;
}

.hero-content {
  flex: 1;
  max-width: 600px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--clr-primary);
  background: var(--clr-primary-muted);
  border: 1px solid rgba(37, 99, 235, 0.2);
  padding: 8px 18px;
  border-radius: 100px;
  margin-bottom: 28px;
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 4rem);
  font-weight: 700;
  color: var(--clr-text);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--clr-text-secondary);
  line-height: 1.65;
  margin-bottom: 18px;
}

.hero-subtitle .separator {
  color: var(--clr-text-muted);
  margin: 0 6px;
}

.hero-location {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  margin-bottom: 36px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-location i {
  color: var(--clr-primary-light);
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-socials {
  display: flex;
  gap: 12px;
}

.social-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-text-secondary);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.social-icon:hover {
  color: var(--clr-primary);
  border-color: var(--clr-primary-light);
  background: var(--clr-primary-subtle);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* Hero Image */
.hero-image-wrap {
  position: relative;
  flex-shrink: 0;
}

.hero-image-ring {
  width: 340px;
  height: 340px;
  border-radius: 50%;
  padding: 6px;
  background: var(--gradient-primary);
  box-shadow: 0 20px 60px rgba(37, 99, 235, 0.25);
  animation: gentle-float 6s ease-in-out infinite;
}

@keyframes gentle-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.hero-image-inner {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  overflow: hidden;
  background: var(--clr-surface);
  border: 4px solid var(--clr-surface);
}

.hero-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.floating-badge {
  position: absolute;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: 100px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-md);
  color: var(--clr-primary);
  letter-spacing: 0.05em;
  animation: gentle-float 4s ease-in-out infinite;
}

.badge-vlsi {
  top: 20px;
  right: -20px;
  animation-delay: 0s;
}

.badge-fpga {
  bottom: 40px;
  right: -30px;
  animation-delay: 0.8s;
}

.badge-ecg {
  bottom: 10px;
  left: -10px;
  animation-delay: 1.6s;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--clr-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--clr-primary), transparent);
  animation: scroll-line 2s ease-in-out infinite;
}

@keyframes scroll-line {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */
.about-section {
  background: var(--gradient-section);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.about-text p {
  font-size: 1rem;
  color: var(--clr-text-secondary);
  margin-bottom: 20px;
  line-height: 1.8;
}

.about-text p strong {
  color: var(--clr-text);
  font-weight: 600;
}

.about-quick-facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}

.quick-fact {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
}

.quick-fact:hover {
  border-color: var(--clr-primary-light);
  background: var(--clr-primary-subtle);
}

.quick-fact i {
  font-size: 1.1rem;
  color: var(--clr-primary);
  flex-shrink: 0;
}

.quick-fact div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.quick-fact strong {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--clr-text);
}

.quick-fact span {
  font-size: 0.78rem;
  color: var(--clr-text-muted);
}

.interests-heading {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.interest-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
}

.interest-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--clr-text);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  padding: 8px 16px;
  border-radius: 100px;
  transition: all var(--transition-fast);
}

.interest-tag:hover {
  color: var(--clr-primary);
  background: var(--clr-primary-muted);
  border-color: rgba(37, 99, 235, 0.3);
  transform: translateY(-2px);
}

.interest-tag i {
  color: var(--clr-primary);
  font-size: 0.85rem;
}

.about-stat-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.stat-card {
  background: var(--gradient-primary);
  color: #fff;
  border-radius: var(--border-radius-sm);
  padding: 20px 16px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.25);
}

.stat-number {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 0.75rem;
  opacity: 0.85;
  font-weight: 500;
}

/* ============================================================
   EDUCATION / TIMELINE
   ============================================================ */
.education-section {
  background: var(--clr-bg);
}

.timeline {
  max-width: 820px;
  margin: 0 auto;
}

.timeline-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 24px;
  margin-bottom: 0;
}

.timeline-item:last-child .timeline-line {
  display: none;
}

.timeline-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.timeline-dot {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--clr-surface);
  border: 2px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-text-muted);
  font-size: 1rem;
  flex-shrink: 0;
  transition: all var(--transition);
  z-index: 1;
}

.timeline-dot.active {
  background: var(--gradient-primary);
  border-color: var(--clr-primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
}

.timeline-line {
  flex: 1;
  width: 2px;
  background: var(--clr-border);
  margin: 8px 0;
  min-height: 40px;
}

.timeline-card {
  margin-bottom: 32px;
}

.timeline-card-header {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px 24px 16px;
  border-bottom: 1px solid var(--clr-border-light);
}

.timeline-institution-logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--clr-primary-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-primary);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.timeline-info {
  flex: 1;
}

.timeline-degree {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 4px;
  line-height: 1.3;
}

.timeline-institution {
  font-size: 0.88rem;
  color: var(--clr-text-secondary);
}

.timeline-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 100px;
  background: var(--clr-bg-alt);
  color: var(--clr-text-muted);
  border: 1px solid var(--clr-border);
  white-space: nowrap;
  flex-shrink: 0;
}

.active-badge {
  background: rgba(37, 99, 235, 0.1);
  color: var(--clr-primary);
  border-color: rgba(37, 99, 235, 0.25);
}

.timeline-card-body {
  padding: 16px 24px 24px;
}

.timeline-meta {
  display: flex;
  gap: 20px;
  margin-bottom: 12px;
}

.timeline-year,
.timeline-score {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--clr-primary);
}

.timeline-desc {
  font-size: 0.92rem;
  color: var(--clr-text-secondary);
  line-height: 1.75;
}

/* ============================================================
   SKILLS SECTION
   ============================================================ */
.skills-section {
  background: var(--gradient-section);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.skill-category {
  padding: 28px;
}

.skill-cat-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.skill-cat-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--clr-primary-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-primary);
  font-size: 1.1rem;
}

.tools-icon {
  background: rgba(14, 165, 233, 0.12);
  color: var(--clr-accent);
}

.subjects-icon {
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
}

.skill-cat-header h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--clr-text);
}

.skill-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.skill-item {}

.skill-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

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

.skill-level {
  font-size: 0.75rem;
  color: var(--clr-text-muted);
  font-weight: 500;
}

.skill-bar-wrap {}

.skill-bar {
  width: 100%;
  height: 7px;
  background: var(--clr-border);
  border-radius: 100px;
  overflow: hidden;
}

.skill-fill {
  height: 100%;
  width: 0%;
  background: var(--gradient-primary);
  border-radius: 100px;
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1) 0.3s;
}

.skill-fill.learning {
  background: linear-gradient(135deg, #f59e0b, #f97316);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.tool-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--clr-bg-alt);
  border: 1px solid var(--clr-border);
  border-radius: var(--border-radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--clr-text);
  transition: all var(--transition-fast);
}

.tool-chip i {
  color: var(--clr-accent);
  font-size: 1rem;
  flex-shrink: 0;
}

.tool-chip:hover {
  border-color: var(--clr-accent);
  background: rgba(14, 165, 233, 0.06);
  transform: translateY(-2px);
}

.subject-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.subject-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--clr-text-secondary);
  padding: 10px 0;
  border-bottom: 1px solid var(--clr-border-light);
}

.subject-item:last-child {
  border-bottom: none;
}

.subject-item i {
  color: #10b981;
  font-size: 0.9rem;
  flex-shrink: 0;
}

/* ============================================================
   PROJECTS SECTION
   ============================================================ */
.projects-section {
  background: var(--clr-bg);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.project-image-wrap {
  position: relative;
  overflow: hidden;
}

.project-img-placeholder {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.electronics-toy {
  background: linear-gradient(135deg, #1e3a5f 0%, #0f2944 100%);
}

.solar-robot {
  background: linear-gradient(135deg, #14532d 0%, #0f3d20 100%);
}

.future-project {
  background: linear-gradient(135deg, #2a1a4a 0%, #1a0f36 100%);
}

.project-img-decor {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.project-img-decor > i {
  font-size: 3rem;
  color: rgba(255, 255, 255, 0.5);
}

.circuit-dots {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.circuit-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  display: block;
  animation: dot-blink 2s ease-in-out infinite;
}

.circuit-dots span:nth-child(2) { animation-delay: 0.3s; }
.circuit-dots span:nth-child(3) { animation-delay: 0.6s; }
.circuit-dots span:nth-child(4) { animation-delay: 0.9s; }
.circuit-dots span:nth-child(5) { animation-delay: 1.2s; }
.circuit-dots span:nth-child(6) { animation-delay: 1.5s; }

@keyframes dot-blink {
  0%, 100% { opacity: 0.15; }
  50% { opacity: 0.8; background: rgba(59, 130, 246, 0.8); }
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-links {
  display: flex;
  gap: 12px;
}

.project-link-btn {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  transition: all var(--transition-fast);
  backdrop-filter: blur(8px);
}

.project-link-btn:hover {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
}

.project-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.project-tag {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--clr-primary);
  background: var(--clr-primary-muted);
  padding: 4px 10px;
  border-radius: 6px;
}

.project-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 12px;
  line-height: 1.35;
}

.project-desc {
  font-size: 0.9rem;
  color: var(--clr-text-secondary);
  line-height: 1.75;
  flex: 1;
  margin-bottom: 18px;
}

.project-footer {
  margin-top: auto;
}

.project-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 100px;
}

.status-done {
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

.status-wip {
  background: rgba(245, 158, 11, 0.1);
  color: #f59e0b;
}

.status-done i, .status-wip i {
  font-size: 0.6rem;
}

.project-future .project-img-decor > i {
  animation: pulse-icon 2.5s ease-in-out infinite;
}

@keyframes pulse-icon {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.9; }
}

/* ============================================================
   CERTIFICATIONS SECTION
   ============================================================ */
.certifications-section {
  background: var(--gradient-section);
}

.certifications-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.cert-card {
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.cert-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.cert-icon-wrap.nptel {
  background: rgba(37, 99, 235, 0.12);
  color: var(--clr-primary);
}

.cert-icon-wrap.fpga {
  background: rgba(14, 165, 233, 0.12);
  color: var(--clr-accent);
}

.cert-icon-wrap.future {
  background: var(--clr-bg-alt);
  color: var(--clr-text-muted);
  border: 2px dashed var(--clr-border);
}

.cert-body {
  flex: 1;
}

.cert-issuer {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-primary);
  display: block;
  margin-bottom: 8px;
}

.cert-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 10px;
  line-height: 1.35;
}

.cert-desc {
  font-size: 0.88rem;
  color: var(--clr-text-secondary);
  line-height: 1.75;
}

.cert-footer {
  margin-top: 4px;
}

.cert-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 100px;
}

.cert-badge.verified {
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
}

.cert-badge.upcoming {
  background: rgba(245, 158, 11, 0.1);
  color: #f59e0b;
}

/* ============================================================
   ACTIVITIES SECTION
   ============================================================ */
.activities-section {
  background: var(--clr-bg);
}

.activities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.activity-card {
  padding: 24px;
  display: flex;
  align-items: flex-start;
  gap: 18px;
}

.activity-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  flex-shrink: 0;
}

.activity-icon.ieee {
  background: rgba(37, 99, 235, 0.12);
  color: var(--clr-primary);
}

.activity-icon.wie {
  background: rgba(236, 72, 153, 0.12);
  color: #ec4899;
}

.activity-icon.sports {
  background: rgba(245, 158, 11, 0.12);
  color: #f59e0b;
}

.activity-icon.hackathon {
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
}

.activity-icon.reporter {
  background: rgba(139, 92, 246, 0.12);
  color: #8b5cf6;
}

.activity-info h3 {
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 8px;
  line-height: 1.3;
}

.activity-info p {
  font-size: 0.86rem;
  color: var(--clr-text-secondary);
  line-height: 1.7;
}

/* ============================================================
   CONTACT SECTION
   ============================================================ */
.contact-section {
  background: var(--gradient-section);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 48px;
  align-items: start;
}

.contact-info-cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-info-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  text-decoration: none;
}

.contact-info-card:hover {
  transform: translateX(6px);
  border-color: var(--clr-primary-light);
  box-shadow: var(--shadow-md);
}

.contact-info-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.email-icon { background: rgba(37, 99, 235, 0.12); color: var(--clr-primary); }
.phone-icon { background: rgba(16, 185, 129, 0.12); color: #10b981; }
.linkedin-icon { background: rgba(14, 165, 233, 0.12); color: var(--clr-accent); }
.github-icon { background: rgba(139, 92, 246, 0.12); color: #8b5cf6; }

.contact-info-text {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.contact-info-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--clr-text-muted);
}

.contact-info-value {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--clr-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.contact-arrow {
  color: var(--clr-text-muted);
  font-size: 0.85rem;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.contact-info-card:hover .contact-arrow {
  transform: translateX(4px);
  color: var(--clr-primary);
}

/* Contact Form */
.contact-form {
  padding: 36px;
}

.form-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--clr-text-secondary);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--border-radius-sm);
  background: var(--clr-bg-alt);
  color: var(--clr-text);
  font-family: var(--font-body);
  font-size: 0.92rem;
  transition: all var(--transition-fast);
  outline: none;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--clr-primary-light);
  background: var(--clr-surface);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.form-submit-btn {
  width: 100%;
  justify-content: center;
  margin-top: 8px;
}

.form-success {
  display: none;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  padding: 14px 18px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--border-radius-sm);
  color: #10b981;
  font-size: 0.9rem;
  font-weight: 500;
}

.form-success.visible {
  display: flex;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--clr-bg-alt);
  border-top: 1px solid var(--clr-border);
  padding: 64px 0 32px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--clr-text);
  display: block;
  margin-bottom: 12px;
}

.footer-tagline {
  font-size: 1rem;
  font-weight: 600;
  color: var(--clr-text);
  margin-bottom: 4px;
}

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

.footer-links-col h4 {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-muted);
  margin-bottom: 20px;
}

.footer-links-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links-col a {
  font-size: 0.9rem;
  color: var(--clr-text-secondary);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--clr-border);
  padding-top: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.footer-thank {
  font-size: 0.95rem;
  color: var(--clr-text-secondary);
  font-style: italic;
}

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

/* ============================================================
   BACK TO TOP
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--gradient-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: all var(--transition);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  transform: none;
  pointer-events: all;
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.5);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .skills-grid {
    grid-template-columns: 1fr 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr 1fr;
  }

  .certifications-grid {
    grid-template-columns: 1fr 1fr;
  }

  .activities-grid {
    grid-template-columns: 1fr 1fr;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-container {
    gap: 40px;
  }

  .hero-image-ring {
    width: 280px;
    height: 280px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 72px 0;
  }

  .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .hero-container {
    flex-direction: column-reverse;
    text-align: center;
    padding: 60px 24px;
    gap: 40px;
  }

  .hero-image-ring {
    width: 220px;
    height: 220px;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-socials {
    justify-content: center;
  }

  .hero-location {
    justify-content: center;
  }

  .hero-badge {
    margin-left: auto;
    margin-right: auto;
  }

  .floating-badge {
    display: none;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .certifications-grid {
    grid-template-columns: 1fr;
  }

  .activities-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .about-stat-cards {
    grid-template-columns: repeat(3, 1fr);
  }

  .about-quick-facts {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 40px 1fr;
    gap: 16px;
  }

  .timeline-card-header {
    flex-wrap: wrap;
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .hero-name {
    font-size: 2.2rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    justify-content: center;
  }

  .contact-form {
    padding: 24px;
  }

  .about-stat-cards {
    grid-template-columns: 1fr;
  }

  .timeline-meta {
    flex-direction: column;
    gap: 8px;
  }
}