/* ==========================================================
   SAMVEDHYA PORTFOLIO - Enhanced Professional Theme
   ========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* -- Variables -- */
:root {
  --font-family: 'Inter', sans-serif;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --primary-bg: #eff6ff;
  --accent: #06b6d4;
  --accent-dark: #0891b2;
  --purple: #8b5cf6;
  --pink: #ec4899;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-card: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.05);
  --radius-sm: 0.5rem;
  --radius: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --nav-height: 4.5rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-secondary);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

ul { list-style: none; }

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

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

/* -- Cursor Glow -- */
.cursor-glow {
  position: fixed;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37,99,235,0.07) 0%, transparent 70%);
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.cursor-glow.active {
  opacity: 1;
}

/* -- Scroll Progress Bar -- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--purple));
  z-index: 10001;
  width: 0%;
  transition: width 0.05s linear;
  border-radius: 0 2px 2px 0;
}

/* -- Canvas -- */
#nokey {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

/* -- Navigation -- */
#desktop-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226,232,240,0.5);
  transition: all var(--transition);
}

#desktop-nav.scrolled {
  box-shadow: 0 4px 30px rgba(0,0,0,0.06);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.nav-logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.02em;
}

.logo-bracket {
  color: var(--accent);
  font-weight: 400;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  font-size: 0.938rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.25rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 1px;
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* -- Hamburger -- */
#hamburger-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
}

.hamburger-menu {
  position: relative;
}

.hamburger-icon {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 20px;
  width: 28px;
  cursor: pointer;
}

.hamburger-icon span {
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger-icon.open span:first-child {
  transform: rotate(45deg) translate(6px, 6px);
}

.hamburger-icon.open span:nth-child(2) {
  opacity: 0;
}

.hamburger-icon.open span:last-child {
  transform: rotate(-45deg) translate(6px, -6px);
}

.menu-links {
  position: absolute;
  top: calc(100% + 1rem);
  right: 0;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: all 0.3s ease;
  min-width: 200px;
}

.menu-links.open {
  max-height: 400px;
  opacity: 1;
}

.menu-links li a {
  display: block;
  padding: 0.875rem 1.5rem;
  font-size: 0.938rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.menu-links li a:hover {
  background: var(--primary-bg);
  color: var(--primary);
}

/* -- Buttons -- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-family);
  font-weight: 600;
  font-size: 0.938rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  position: relative;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
}

.btn-glow {
  animation: btnGlow 3s ease-in-out infinite;
}

@keyframes btnGlow {
  0%, 100% { box-shadow: 0 0 5px rgba(37,99,235,0.2); }
  50% { box-shadow: 0 0 20px rgba(37,99,235,0.4), 0 0 40px rgba(37,99,235,0.1); }
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text-primary);
}

.btn-sm:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--primary-bg);
  border-color: var(--primary-bg);
  color: var(--primary);
}

.btn-accent:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* -- Section Styles -- */
section {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

.section-alt {
  position: relative;
}

.section-alt::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  height: 100%;
  background: var(--bg-alt);
  z-index: -1;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

/* Animated Gradient Text for Section Titles */
.gradient-text {
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary) 50%, var(--accent) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 4s ease-in-out infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% center; }
  50% { background-position: 100% center; }
}

/* -- Wave Dividers -- */
.wave-divider {
  position: relative;
  width: 100%;
  overflow: hidden;
  line-height: 0;
  margin-top: -1px;
}

.wave-divider svg {
  width: 100%;
  height: 80px;
  display: block;
}

.wave-flip {
  transform: scaleY(-1);
  margin-bottom: -1px;
  margin-top: 0;
}

/* -- Hero / Profile -- */
#profile {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding-top: var(--nav-height);
  position: relative;
  overflow: hidden;
}

/* Gradient Blobs */
.hero-blobs {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.45;
}

.blob-1 {
  width: 500px;
  height: 500px;
  background: linear-gradient(135deg, rgba(37,99,235,0.35), rgba(6,182,212,0.25));
  top: -10%;
  right: -5%;
  animation: blobFloat1 18s ease-in-out infinite alternate;
}

.blob-2 {
  width: 400px;
  height: 400px;
  background: linear-gradient(135deg, rgba(6,182,212,0.25), rgba(139,92,246,0.2));
  bottom: -10%;
  left: -5%;
  animation: blobFloat2 22s ease-in-out infinite alternate;
}

.blob-3 {
  width: 350px;
  height: 350px;
  background: linear-gradient(135deg, rgba(236,72,153,0.15), rgba(37,99,235,0.2));
  top: 40%;
  left: 35%;
  animation: blobFloat3 20s ease-in-out infinite alternate;
}

@keyframes blobFloat1 {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-100px, 80px) scale(1.15); }
}

@keyframes blobFloat2 {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(80px, -100px) scale(1.2); }
}

@keyframes blobFloat3 {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-60px, -80px) scale(0.85); }
}

.profile-content {
  display: flex;
  align-items: center;
  gap: 5rem;
  max-width: 1200px;
  padding: 0 2rem;
  position: relative;
  z-index: 1;
}

.profile-pic-container {
  flex-shrink: 0;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  overflow: hidden;
  position: relative;
  border: 4px solid var(--primary-bg);
  box-shadow: var(--shadow-lg), 0 0 0 8px rgba(37,99,235,0.08);
}

.profile-pic-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.profile-text {
  max-width: 600px;
  position: relative;
  z-index: 1;
}

.greeting {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.greeting-wave {
  display: inline-block;
  animation: wave 2.5s ease-in-out infinite;
  transform-origin: 70% 70%;
}

@keyframes wave {
  0%, 100% { transform: rotate(0deg); }
  10% { transform: rotate(14deg); }
  20% { transform: rotate(-8deg); }
  30% { transform: rotate(14deg); }
  40% { transform: rotate(-4deg); }
  50% { transform: rotate(10deg); }
  60%, 100% { transform: rotate(0deg); }
}

.name {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.name .accent {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  font-size: 1.25rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-bottom: 2rem;
  min-height: 1.8em;
}

.typed-cursor {
  color: var(--primary);
  font-weight: 300;
  animation: cursorBlink 1s step-end infinite;
}

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

.profile-buttons {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  color: var(--text-secondary);
  font-size: 1.125rem;
  transition: all var(--transition);
}

.social-links a:hover {
  border-color: var(--primary);
  color: #fff;
  background: var(--primary);
  transform: translateY(-3px) scale(1.1);
  box-shadow: 0 4px 15px rgba(37,99,235,0.3);
}

/* Mouse Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  z-index: 1;
}

.mouse-scroll {
  width: 26px;
  height: 42px;
  border: 2px solid var(--text-muted);
  border-radius: 13px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.mouse-scroll-wheel {
  width: 4px;
  height: 10px;
  background: var(--primary);
  border-radius: 2px;
  animation: scrollWheel 2s ease-in-out infinite;
}

@keyframes scrollWheel {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(12px); opacity: 0; }
}

/* -- About -- */
.about-content {
  display: flex;
  align-items: center;
  gap: 4rem;
}

.about-pic-container {
  flex-shrink: 0;
  width: 300px;
  height: 380px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.about-pic-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: transform 0.6s ease;
}

.about-pic-container:hover img {
  transform: scale(1.05);
}

.about-pic-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(37,99,235,0.15), transparent 50%);
  pointer-events: none;
}

.about-text {
  max-width: 600px;
}

.about-text p {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.about-text p:last-child {
  margin-bottom: 0;
}

/* -- Experience -- */
.experience-tabs {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
}

.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 2rem;
  border: 1.5px solid var(--border);
  border-radius: 50px;
  background: var(--bg);
  font-family: var(--font-family);
  font-size: 0.938rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}

.tab-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 15px rgba(37,99,235,0.25);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: fadeSlideIn 0.5s ease;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Timeline */
.timeline {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--accent));
  border-radius: 1px;
}

.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -2rem;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid var(--primary-bg);
  z-index: 1;
  box-shadow: 0 0 0 4px rgba(37,99,235,0.15);
  transition: all var(--transition);
}

.timeline-item:hover .timeline-dot {
  transform: scale(1.3);
  box-shadow: 0 0 0 6px rgba(37,99,235,0.2);
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.timeline-content:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
  transform: translateX(6px);
}

.timeline-content h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.timeline-content .institution {
  display: block;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.timeline-content .date {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.813rem;
  color: var(--text-muted);
}

/* -- Skills -- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

/* Gradient border glow on hover */
.skill-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 2px;
  background: linear-gradient(135deg, var(--primary), var(--accent), var(--purple));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

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

.skill-card:hover {
  border-color: transparent;
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.skill-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.skill-icon-wrap {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-bg), rgba(6,182,212,0.1));
  border-radius: var(--radius-sm);
  font-size: 1.25rem;
  color: var(--primary);
  transition: all var(--transition);
}

.skill-card:hover .skill-icon-wrap {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  transform: rotate(-5deg) scale(1.1);
}

.skill-card-header h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tags span {
  font-size: 0.813rem;
  font-weight: 500;
  padding: 0.375rem 0.875rem;
  background: var(--bg-alt);
  color: var(--text-secondary);
  border-radius: 50px;
  border: 1px solid var(--border-light);
  transition: all var(--transition);
  cursor: default;
}

.skill-tags span:hover {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(37,99,235,0.2);
}

/* -- Projects -- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.4s ease;
  transform-style: preserve-3d;
  will-change: transform;
}

.project-card:hover {
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.12);
}

.project-img-wrapper {
  height: 220px;
  overflow: hidden;
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.project-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.project-card:hover .project-img-wrapper img {
  transform: scale(1.08);
}

/* Hover Overlay */
.project-overlay {
  position: absolute;
  inset: 0;
  background: rgba(30,41,59,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  opacity: 0;
  transition: opacity 0.4s ease;
}

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

.overlay-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  background: #fff;
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  transition: all var(--transition);
  text-decoration: none;
}

.overlay-btn:hover {
  background: var(--primary);
  color: #fff;
  transform: scale(1.05);
}

.overlay-btn.accent {
  background: var(--accent);
  color: #fff;
}

.overlay-btn.accent:hover {
  background: var(--accent-dark);
}

.project-info {
  padding: 1.5rem;
}

.project-info h3 {
  font-size: 1.063rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.project-tech {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.project-tech span {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.75rem;
  background: var(--primary-bg);
  color: var(--primary);
  border-radius: 50px;
}

/* -- Contact -- */
#contact {
  text-align: center;
}

.contact-cards {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 2.5rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  min-width: 220px;
  transition: all var(--transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

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

.contact-card:hover::before {
  transform: scaleX(1);
}

.contact-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
}

.contact-icon-wrap {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-bg), rgba(6,182,212,0.08));
  border-radius: 50%;
  font-size: 1.5rem;
  color: var(--primary);
  transition: all var(--transition);
}

.contact-card:hover .contact-icon-wrap {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  transform: scale(1.1) rotate(-5deg);
}

.contact-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.contact-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* -- Back to Top -- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  box-shadow: 0 4px 15px rgba(37,99,235,0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
  z-index: 999;
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(37,99,235,0.4);
}

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

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1.5rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1.5rem;
}

.footer-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
}

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

.footer-socials {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.footer-socials a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: all var(--transition);
}

.footer-socials a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

.footer-copy {
  font-size: 0.813rem;
  color: var(--text-muted);
}

/* -- Scroll Reveal Animations -- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-up {
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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