/* ============================================
   DESIGN SYSTEM — Muhammed Sadiq T Portfolio
   ============================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');

/* ---- CSS Custom Properties ---- */
:root {
  /* Colors — Dark Premium Palette */
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #1a2035;
  --bg-card-hover: #1f2847;
  --bg-nav: rgba(10, 14, 23, 0.85);
  --bg-code: #151d2e;

  --text-primary: #f0f2f5;
  --text-secondary: #94a3b8;
  --text-tertiary: #64748b;
  --text-muted: #475569;

  --accent: #2dd4bf;
  --accent-secondary: #06b6d4;
  --accent-dim: rgba(45, 212, 191, 0.1);
  --accent-dim-hover: rgba(45, 212, 191, 0.18);
  --accent-gradient: linear-gradient(135deg, #2dd4bf, #06b6d4);
  --accent-gradient-text: linear-gradient(135deg, #2dd4bf 0%, #06b6d4 50%, #818cf8 100%);

  --border: #1e293b;
  --border-hover: #334155;
  --border-accent: rgba(45, 212, 191, 0.25);

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(45, 212, 191, 0.08);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.25rem;
  --fs-xl: 1.5rem;
  --fs-2xl: 2rem;
  --fs-3xl: 2.5rem;
  --fs-4xl: 3.5rem;
  --fs-5xl: 4.5rem;

  --fw-light: 300;
  --fw-normal: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-extrabold: 800;

  --lh-tight: 1.15;
  --lh-normal: 1.6;
  --lh-relaxed: 1.75;

  --ls-tight: -0.03em;
  --ls-normal: 0;
  --ls-wide: 0.05em;
  --ls-wider: 0.12em;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 72px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: var(--fs-base);
  font-weight: var(--fw-normal);
  line-height: var(--lh-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

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

a:hover {
  color: var(--accent-secondary);
}

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

::selection {
  background: rgba(45, 212, 191, 0.3);
  color: var(--text-primary);
}

/* ---- Utilities ---- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-5xl) 0;
  position: relative;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: var(--ls-wider);
  margin-bottom: var(--space-md);
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.section-title {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-tight);
  margin-bottom: var(--space-lg);
}

.section-subtitle {
  font-size: var(--fs-md);
  color: var(--text-secondary);
  max-width: 600px;
  line-height: var(--lh-relaxed);
}

/* Scroll animation base */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }

/* ============================================
   BACKGROUND EFFECTS
   ============================================ */

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(45, 212, 191, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 212, 191, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black, transparent);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black, transparent);
}

.bg-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.07;
  pointer-events: none;
  z-index: 0;
}

.bg-glow--teal {
  background: var(--accent);
  top: -200px;
  right: -100px;
}

.bg-glow--blue {
  background: #818cf8;
  bottom: 30%;
  left: -200px;
  opacity: 0.04;
}

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: var(--bg-nav);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), background var(--transition-base);
}

.nav.scrolled {
  border-bottom-color: var(--border);
  background: rgba(10, 14, 23, 0.95);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav__logo {
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  letter-spacing: var(--ls-tight);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav__logo-accent {
  color: var(--accent);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
}

.nav__link {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 1px;
  transition: width var(--transition-base);
}

.nav__link:hover,
.nav__link.active {
  color: var(--text-primary);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--bg-primary);
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.nav__cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(45, 212, 191, 0.3);
  color: var(--bg-primary);
}

/* Mobile menu toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
  z-index: 1001;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.nav__toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav__toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* CV Download button — hidden on desktop, visible in mobile drawer */
.nav__cv-download {
  display: none;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  position: relative;
  z-index: 1;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-4xl);
  align-items: center;
}

.hero__content {
  max-width: 620px;
}

/* Hero Profile Image — Creative Blob Design */
.hero__image-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 400px;
  height: 400px;
  opacity: 0;
  animation: fadeScaleIn 0.8s 0.6s forwards;
}

/* Multi-layer ambient glow */
.hero__image-glow {
  position: absolute;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(45, 212, 191, 0.18) 0%,
    rgba(6, 182, 212, 0.08) 40%,
    transparent 70%
  );
  filter: blur(50px);
  pointer-events: none;
  animation: glowPulse 4s ease-in-out infinite;
}

/* Orbit rings */
.hero__orbit {
  position: absolute;
  border-radius: 50%;
  border: 1px dashed rgba(45, 212, 191, 0.12);
  pointer-events: none;
}

.hero__orbit--1 {
  width: 380px;
  height: 380px;
  animation: orbitSpin 25s linear infinite;
}

.hero__orbit--2 {
  width: 340px;
  height: 340px;
  border-color: rgba(129, 140, 248, 0.1);
  animation: orbitSpin 18s linear infinite reverse;
}

/* Floating particles */
.hero__particle {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.hero__particle--1 {
  width: 8px;
  height: 8px;
  background: var(--accent);
  top: 30px;
  right: 60px;
  box-shadow: 0 0 12px rgba(45, 212, 191, 0.6);
  animation: particleDrift1 6s ease-in-out infinite;
}

.hero__particle--2 {
  width: 5px;
  height: 5px;
  background: #818cf8;
  bottom: 50px;
  left: 40px;
  box-shadow: 0 0 10px rgba(129, 140, 248, 0.5);
  animation: particleDrift2 7s ease-in-out infinite;
}

.hero__particle--3 {
  width: 6px;
  height: 6px;
  background: var(--accent-secondary);
  top: 50%;
  right: 10px;
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.5);
  animation: particleDrift3 5s ease-in-out infinite;
}

.hero__particle--4 {
  width: 4px;
  height: 4px;
  background: var(--accent);
  bottom: 80px;
  right: 80px;
  box-shadow: 0 0 8px rgba(45, 212, 191, 0.4);
  animation: particleDrift1 8s ease-in-out infinite reverse;
}

/* Blob-shaped image container */
.hero__image-blob {
  position: relative;
  width: 320px;
  height: 320px;
  border-radius: 62% 38% 46% 54% / 60% 44% 56% 40%;
  overflow: hidden;
  animation: blobMorph 8s ease-in-out infinite;
  box-shadow:
    0 0 0 2px rgba(45, 212, 191, 0.15),
    0 0 30px rgba(45, 212, 191, 0.1),
    0 0 60px rgba(45, 212, 191, 0.05),
    inset 0 0 40px rgba(0, 0, 0, 0.3);
  z-index: 2;
}

.hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
  background: var(--bg-secondary);
  transition: transform var(--transition-slow);
}

.hero__image-wrapper:hover .hero__image {
  transform: scale(1.05);
}

.hero__image-wrapper:hover .hero__orbit--1 {
  border-color: rgba(45, 212, 191, 0.25);
}

.hero__image-wrapper:hover .hero__orbit--2 {
  border-color: rgba(129, 140, 248, 0.2);
}

/* Keyframes for image effects */
@keyframes fadeScaleIn {
  from {
    opacity: 0;
    transform: scale(0.85);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes blobMorph {
  0%   { border-radius: 62% 38% 46% 54% / 60% 44% 56% 40%; }
  25%  { border-radius: 48% 52% 58% 42% / 42% 60% 40% 58%; }
  50%  { border-radius: 42% 58% 38% 62% / 54% 38% 62% 46%; }
  75%  { border-radius: 56% 44% 52% 48% / 46% 56% 44% 54%; }
  100% { border-radius: 62% 38% 46% 54% / 60% 44% 56% 40%; }
}

@keyframes orbitSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes glowPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.1); }
}

@keyframes particleDrift1 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-12px, 18px); }
}

@keyframes particleDrift2 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(15px, -12px); }
}

@keyframes particleDrift3 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-8px, -15px); }
}

.hero__greeting {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--accent);
  margin-bottom: var(--space-xl);
  letter-spacing: var(--ls-wide);
  opacity: 0;
  animation: fadeSlideUp 0.6s 0.2s forwards;
}

.hero__greeting::before {
  content: '//';
  opacity: 0.5;
}

.hero__name {
  font-size: var(--fs-5xl);
  font-weight: var(--fw-extrabold);
  letter-spacing: var(--ls-tight);
  line-height: 1.05;
  margin-bottom: var(--space-md);
  opacity: 0;
  animation: fadeSlideUp 0.6s 0.35s forwards;
}

.hero__name-gradient {
  background: var(--accent-gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__title {
  font-size: var(--fs-xl);
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  opacity: 0;
  animation: fadeSlideUp 0.6s 0.5s forwards;
}

.hero__description {
  font-size: var(--fs-md);
  color: var(--text-tertiary);
  line-height: var(--lh-relaxed);
  max-width: 560px;
  margin-bottom: var(--space-2xl);
  opacity: 0;
  animation: fadeSlideUp 0.6s 0.65s forwards;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeSlideUp 0.6s 0.8s forwards;
}

.hero__socials {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin-top: var(--space-3xl);
  opacity: 0;
  animation: fadeSlideUp 0.6s 0.95s forwards;
}

.hero__social-link {
  color: var(--text-muted);
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: inline-flex;
}

.hero__social-link:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

.hero__social-link svg {
  width: 22px;
  height: 22px;
}

.hero__scroll-hint {
  position: absolute;
  bottom: var(--space-3xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-muted);
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wide);
  opacity: 0;
  animation: fadeIn 1s 1.5s forwards;
}

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

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-primary);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  padding: 14px 28px;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  color: var(--bg-primary);
  background: var(--accent-gradient);
  box-shadow: 0 2px 15px rgba(45, 212, 191, 0.2);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(45, 212, 191, 0.35);
  color: var(--bg-primary);
}

.btn--secondary {
  color: var(--text-primary);
  background: transparent;
  border: 1px solid var(--border-hover);
}

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

.btn__icon {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.btn:hover .btn__icon {
  transform: translateX(3px);
}

/* ============================================
   ABOUT SECTION
   ============================================ */

.about {
  z-index: 1;
  position: relative;
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: start;
}

.about__text p {
  color: var(--text-secondary);
  font-size: var(--fs-md);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-lg);
}

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

.about__highlight {
  color: var(--text-primary);
  font-weight: var(--fw-medium);
}

.about__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.stat-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.stat-card__number {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-extrabold);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.stat-card__label {
  font-size: var(--fs-sm);
  color: var(--text-tertiary);
  font-weight: var(--fw-medium);
}

/* ============================================
   EXPERIENCE SECTION
   ============================================ */

.experience {
  z-index: 1;
  position: relative;
}

.experience__timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-3xl);
  margin-top: 50px;
}

.experience__timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 31px;
  width: 2px;
  height: 100%;
  background: linear-gradient(to bottom, var(--accent), var(--border), transparent);
  border-radius: 1px;
}

.exp-card {
  position: relative;
  padding-left: 80px;
}

.exp-card__dot {
  position: absolute;
  left: 22px;
  top: 6px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--accent);
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
}

.exp-card__dot::after {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.exp-card__header {
  margin-bottom: var(--space-lg);
}

.exp-card__date {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--accent);
  letter-spacing: var(--ls-wide);
  margin-bottom: var(--space-sm);
}

.exp-card__role {
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.exp-card__company {
  font-size: var(--fs-base);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.exp-card__company-tag {
  font-size: var(--fs-xs);
  color: var(--accent);
  background: var(--accent-dim);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-weight: var(--fw-medium);
}

.exp-card__body {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.exp-card__body:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}

.exp-card__achievements {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.exp-card__achievement {
  display: flex;
  gap: var(--space-md);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
}

.exp-card__achievement::before {
  content: '▹';
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 1px;
}

.exp-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
}

.exp-card__tech-tag {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--accent);
  background: var(--accent-dim);
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

/* ============================================
   SKILLS SECTION
   ============================================ */

.skills {
  z-index: 1;
  position: relative;
}

.skills__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  margin-top: 50px;
}

.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.skill-group:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.skill-group__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  color: var(--accent);
}

.skill-group__icon svg {
  width: 20px;
  height: 20px;
}

.skill-group__title {
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
}

.skill-group__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.skill-tag {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  background: var(--bg-secondary);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  transition: all var(--transition-fast);
}

.skill-tag:hover {
  color: var(--accent);
  border-color: var(--border-accent);
  background: var(--accent-dim);
}

/* ============================================
   PROJECTS SECTION
   ============================================ */

.projects {
  z-index: 1;
  position: relative;
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  margin-top: 50px;
}

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

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.project-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

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

.project-card__icon {
  color: var(--accent);
  margin-bottom: var(--space-xl);
}

.project-card__icon svg {
  width: 28px;
  height: 28px;
}

.project-card__title {
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.project-card__type {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--accent);
  letter-spacing: var(--ls-wide);
  margin-bottom: var(--space-lg);
}

.project-card__date {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
}

.project-card__desc {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-xl);
  flex: 1;
}

.project-card__desc li {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.project-card__desc li::before {
  content: '▹';
  color: var(--accent);
  flex-shrink: 0;
}

.project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: auto;
}

.project-card__tech-tag {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
}

.project-card__tech-tag + .project-card__tech-tag::before {
  content: '·  ';
  color: var(--text-muted);
}

/* ============================================
   EDUCATION SECTION
   ============================================ */

.education {
  z-index: 1;
  position: relative;
}

.education__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  margin-top: 50px;
}

.edu-block__title {
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.edu-block__title-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.edu-block__title-icon svg {
  width: 18px;
  height: 18px;
}

.edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
  transition: border-color var(--transition-base);
}

.edu-card:last-child {
  margin-bottom: 0;
}

.edu-card:hover {
  border-color: var(--border-accent);
}

.edu-card__degree {
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.edu-card__school {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.edu-card__date {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

.cert-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
  transition: border-color var(--transition-base);
}

.cert-card:last-child {
  margin-bottom: 0;
}

.cert-card:hover {
  border-color: var(--border-accent);
}

.cert-card__icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
}

.cert-card__icon svg {
  width: 16px;
  height: 16px;
}

.cert-card__name {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text-primary);
}

.cert-card__id {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-top: 2px;
}

/* ============================================
   CONTACT SECTION
   ============================================ */

.contact {
  z-index: 1;
  position: relative;
}

.contact__inner {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact__title {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  letter-spacing: var(--ls-tight);
}

.contact__text {
  font-size: var(--fs-md);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-2xl);
}

.contact__email {
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  color: var(--accent);
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-3xl);
}

.contact__email:hover {
  color: var(--accent-secondary);
}

.contact__links {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
}

.contact__link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-sm);
  color: var(--text-tertiary);
  transition: color var(--transition-fast);
  text-decoration: none;
}

.contact__link:hover {
  color: var(--accent);
}

.contact__link svg {
  width: 18px;
  height: 18px;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--border);
  z-index: 1;
  position: relative;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__text {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.footer__text a {
  color: var(--text-tertiary);
  transition: color var(--transition-fast);
}

.footer__text a:hover {
  color: var(--accent);
}

.footer__built {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ============================================
   KEYFRAME ANIMATIONS
   ============================================ */

@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(25px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scrollPulse {
  0%, 100% {
    opacity: 1;
    transform: scaleY(1);
  }
  50% {
    opacity: 0.3;
    transform: scaleY(0.5);
    transform-origin: top;
  }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
  :root {
    --fs-5xl: 3.5rem;
    --fs-4xl: 2.75rem;
    --fs-3xl: 2rem;
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
  }

  .hero__image-wrapper {
    width: 350px;
    height: 350px;
  }

  .hero__image-blob {
    width: 280px;
    height: 280px;
  }

  .hero__orbit--1 {
    width: 330px;
    height: 330px;
  }

  .hero__orbit--2 {
    width: 300px;
    height: 300px;
  }

  .about__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .projects__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .skills__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --fs-5xl: 2.5rem;
    --fs-4xl: 2rem;
    --fs-3xl: 1.75rem;
    --fs-2xl: 1.5rem;
    --nav-height: 64px;
  }

  .container {
    padding: 0 var(--space-lg);
  }

  .section {
    padding: var(--space-4xl) 0;
  }

  /* Mobile Nav */
  .nav__links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-secondary);
    flex-direction: column;
    align-items: flex-start;
    padding: calc(var(--nav-height) + var(--space-xl)) var(--space-xl) var(--space-xl);
    gap: var(--space-lg);
    border-left: 1px solid var(--border);
    transition: right var(--transition-base);
    z-index: 999;
  }

  .nav__links.open {
    right: 0;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__cv-download {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    margin-top: auto;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border);
    width: 100%;
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
  }

  .nav__cv-download:hover {
    color: var(--accent);
  }

  .nav__cv-download svg {
    flex-shrink: 0;
    transition: color var(--transition-fast);
  }

  /* Hero adjustments */
  .hero {
    min-height: auto;
    padding-top: calc(var(--nav-height) + var(--space-2xl));
    padding-bottom: var(--space-3xl);
    align-items: flex-start;
  }

  .hero__grid {
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
  }

  .hero__image-wrapper {
    display: none !important;
    width: 300px;
    height: 300px;
    justify-content: center;
    order: -1;
  }

  .hero__image-blob {
    width: 240px;
    height: 240px;
  }

  .hero__orbit--1 {
    width: 280px;
    height: 280px;
  }

  .hero__orbit--2 {
    width: 260px;
    height: 260px;
  }

  .hero__particle {
    display: none;
  }

  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
  }

  .hero__actions .btn {
    width: 100%;
    justify-content: center;
  }

  .hero__scroll-hint {
    display: none;
  }

  /* Grid adjustments */
  .about__stats {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

  /* Experience */
  .experience__timeline::before {
    left: 11px;
  }

  .exp-card {
    padding-left: 44px;
  }

  .exp-card__dot {
    left: 2px;
    width: 20px;
    height: 20px;
  }

  /* Contact */
  .contact__links {
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
  }

  /* Footer */
  .footer__inner {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}

/* Small mobile */
@media (max-width: 400px) {
  :root {
    --fs-5xl: 2rem;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .hero__image-wrapper { display: none; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}