/* ============================================
   NOVA THEME — Ruchika Singh Portfolio
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors */
  --bg-primary: #0A0A0F;
  --bg-secondary: #111118;
  --bg-card: #13131c;
  --bg-card-hover: #1a1a26;
  --border: rgba(255,255,255,0.06);
  --border-accent: rgba(100,255,218,0.2);

  --text-primary: #e8e8f0;
  --text-secondary: #8888a8;
  --text-muted: #55556a;

  --accent: #64FFDA;
  --accent-dim: rgba(100,255,218,0.1);
  --accent-mid: rgba(100,255,218,0.4);

  --gradient-hero: radial-gradient(ellipse 80% 60% at 60% 0%, rgba(100,255,218,0.08) 0%, transparent 60%);
  --gradient-section: radial-gradient(ellipse 60% 40% at 20% 50%, rgba(100,130,255,0.06) 0%, transparent 60%);

  /* Typography */
  --font-sans: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --section-padding: clamp(80px, 12vw, 140px);
  --container-width: 1200px;
  --container-pad: clamp(20px, 5vw, 60px);

  /* Motion */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 600ms;

  /* Shadows */
  --shadow-card: 0 2px 20px rgba(0,0,0,0.4);
  --shadow-accent: 0 0 40px rgba(100,255,218,0.08);

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
}

/* ---------- Light Mode Variables ---------- */
[data-theme="light"] {
  --bg-primary: #f5f5f7;
  --bg-secondary: #ebebef;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f0f6;
  --border: rgba(0,0,0,0.08);
  --border-accent: rgba(0,150,120,0.25);

  --text-primary: #111118;
  --text-secondary: #44445a;
  --text-muted: #88889a;

  --accent: #009978;
  --accent-dim: rgba(0,153,120,0.1);
  --accent-mid: rgba(0,153,120,0.4);

  --gradient-hero: radial-gradient(ellipse 80% 60% at 60% 0%, rgba(0,153,120,0.08) 0%, transparent 60%);
  --gradient-section: radial-gradient(ellipse 60% 40% at 20% 50%, rgba(80,100,220,0.05) 0%, transparent 60%);

  --shadow-card: 0 2px 20px rgba(0,0,0,0.08);
  --shadow-accent: 0 0 40px rgba(0,153,120,0.08);
}

/* Light mode: invert profile placeholder tones */
[data-theme="light"] .profile-image-wrapper {
  background: #e0e0e8;
  border-color: rgba(0,0,0,0.08);
}

[data-theme="light"] .hero-grid {
  background-image:
    linear-gradient(rgba(0,0,0,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.04) 1px, transparent 1px);
}

[data-theme="light"] .toggle-bar {
  background: var(--text-primary);
}

/* Smooth global transition when switching themes */
body {
  transition: background-color 350ms ease, color 350ms ease;
}

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

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

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

/* Reduce motion for accessibility */
@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; }
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: var(--accent);
  color: var(--bg-primary);
}

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

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 48px;
}

.section-header {
  margin-bottom: 16px;
}

.section-header--center {
  text-align: center;
}

.section-header--center .section-title {
  margin-left: auto;
  margin-right: auto;
}

.subsection-title {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: all var(--duration-normal) var(--ease-out-expo);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: #4fd6b8;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(100,255,218,0.25);
}

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

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

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border-accent);
}

.btn-outline:hover {
  background: var(--accent-dim);
  transform: translateY(-2px);
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
  transition: background var(--duration-normal) var(--ease-in-out),
              backdrop-filter var(--duration-normal) var(--ease-in-out),
              box-shadow var(--duration-normal) var(--ease-in-out);
}

.site-header.scrolled {
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border);
  padding: 14px 0;
}

[data-theme="light"] .site-header.scrolled {
  background: rgba(245,245,247,0.88);
}

.nav-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.nav-logo {
  flex-shrink: 0;
}

.logo-text {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.02em;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.nav-logo:hover .logo-text {
  background: var(--accent);
  color: var(--bg-primary);
  transform: rotate(-3deg);
}

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

.nav-link {
  padding: 8px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-in-out);
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}

[data-theme="light"] .nav-link:hover {
  background: rgba(0,0,0,0.06);
}

.nav-link.active {
  color: var(--accent);
}

.nav-cta {
  padding: 8px 18px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-sm);
  background: var(--accent-dim);
  transition: all var(--duration-normal) var(--ease-out-expo);
  margin-left: 8px;
}

.nav-cta:hover {
  background: var(--accent);
  color: var(--bg-primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(100,255,218,0.2);
}

/* ---------- Theme Toggle ---------- */
.nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  transition: all var(--duration-normal) var(--ease-out-expo);
  flex-shrink: 0;
}

.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--border-accent);
  background: var(--accent-dim);
  transform: rotate(12deg) scale(1.05);
}

/* Show/hide icons based on current theme */
.icon-sun  { display: none; }
.icon-moon { display: block; }

[data-theme="light"] .icon-sun  { display: block; }
[data-theme="light"] .icon-moon { display: none; }

/* ---------- Nav Toggle (hamburger) ---------- */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: var(--radius-sm);
}

.toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

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

.hero-gradient {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 80% at 60% 20%, black 0%, transparent 70%);
}

.hero-particles {
  position: absolute;
  inset: 0;
}

.particle {
  position: absolute;
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0;
  animation: float-particle 6s ease-in-out infinite;
}

@keyframes float-particle {
  0%, 100% { opacity: 0; transform: translateY(0) scale(0); }
  20% { opacity: 0.6; transform: translateY(-20px) scale(1); }
  80% { opacity: 0.3; transform: translateY(-60px) scale(0.5); }
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 80px;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(100,255,218,0.06);
  border: 1px solid var(--border-accent);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 28px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.5); opacity: 0.6; }
}

.hero-name {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
}

.hero-greeting {
  font-size: clamp(1rem, 2vw, 1.1rem);
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}

.hero-title-name {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  background: linear-gradient(135deg, #e8e8f0 0%, #9898b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-role {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: clamp(0.9rem, 1.8vw, 1.1rem);
  color: var(--accent);
  margin-bottom: 24px;
}

.cursor-blink {
  animation: blink 1s step-end infinite;
  color: var(--accent);
}

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

.hero-description {
  font-size: clamp(0.95rem, 1.5vw, 1.05rem);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 480px;
}

.hero-company-link {
  color: var(--accent);
  border-bottom: 1px solid var(--border-accent);
  transition: border-color var(--duration-fast);
}

.hero-company-link:hover {
  border-color: var(--accent);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}

.hero-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.social-link:hover {
  color: var(--accent);
  border-color: var(--border-accent);
  background: var(--accent-dim);
  transform: translateY(-3px);
}

/* ---------- Hero Visual / Profile ---------- */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.profile-frame {
  position: relative;
  width: 360px;
  height: 360px;
}

.profile-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid transparent;
  animation: rotate-ring linear infinite;
}

.ring-1 {
  inset: -20px;
  border-top-color: var(--accent);
  border-right-color: rgba(100,255,218,0.2);
  animation-duration: 12s;
}

.ring-2 {
  inset: -44px;
  border-bottom-color: rgba(100,130,255,0.4);
  border-left-color: rgba(100,130,255,0.1);
  animation-duration: 20s;
  animation-direction: reverse;
}

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

.profile-image-wrapper {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--border);
  background: var(--bg-card);
}

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

.profile-badge-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: rgba(13,13,20,0.9);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-primary);
  box-shadow: var(--shadow-card);
  animation: float-badge 4s ease-in-out infinite;
}

.experience-badge {
  bottom: 30px;
  left: -30px;
  flex-direction: column;
  gap: 2px;
  animation-delay: 0s;
}

.badge-number {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.badge-label {
  font-size: 0.7rem;
  color: var(--text-secondary);
}

.location-badge {
  top: 30px;
  right: -20px;
  animation-delay: -2s;
  color: var(--text-secondary);
}

.location-badge svg {
  color: var(--accent);
}

@keyframes float-badge {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce-scroll 2.4s ease-in-out infinite;
}

.scroll-mouse {
  width: 24px;
  height: 38px;
  border: 2px solid var(--border);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}

.scroll-wheel {
  width: 3px;
  height: 8px;
  background: var(--text-muted);
  border-radius: 2px;
  animation: scroll-wheel 2.4s ease-in-out infinite;
}

@keyframes scroll-wheel {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(10px); opacity: 0; }
}

@keyframes bounce-scroll {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ---------- About Section ---------- */
.about {
  padding: var(--section-padding) 0;
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.about::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-section);
  pointer-events: none;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-lead {
  font-size: clamp(1.05rem, 1.8vw, 1.2rem);
  line-height: 1.7;
  color: var(--text-primary);
  margin-bottom: 20px;
  font-weight: 400;
}

.about-lead em {
  color: var(--accent);
  font-style: normal;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.8;
}

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

.about-cta-row {
  margin-top: 32px;
}

/* Timeline */
.experience-timeline {
  margin-bottom: 40px;
}

.timeline {
  position: relative;
  padding-left: 24px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 32px;
}

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

.timeline-dot {
  position: absolute;
  left: -24px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--accent);
  transition: all var(--duration-normal);
}

.timeline-item--edu .timeline-dot {
  border-color: rgba(100,130,255,0.6);
}

.timeline-item:hover .timeline-dot {
  background: var(--accent);
  box-shadow: 0 0 12px rgba(100,255,218,0.4);
}

.timeline-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 4px;
}

.timeline-header strong {
  font-size: 0.9rem;
  color: var(--text-primary);
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.timeline-company {
  display: block;
  font-size: 0.82rem;
  color: var(--accent);
  margin-bottom: 6px;
}

.timeline-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Skills */
.skills-block {}

.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.skill-category {}

.skill-cat-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.skill-tag {
  padding: 4px 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  transition: all var(--duration-fast);
}

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

/* ---------- Projects Section ---------- */
.projects {
  padding: var(--section-padding) 0;
  position: relative;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.project-card {
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: all var(--duration-normal) var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(100,255,218,0.04), transparent);
  opacity: 0;
  transition: opacity var(--duration-normal);
}

.project-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4), var(--shadow-accent);
}

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

.project-card--featured {
  grid-column: 1 / -1;
  background: var(--bg-card);
}

.project-card--placeholder {
  opacity: 0.5;
}

.project-card-inner {
  padding: 28px;
}

.project-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.project-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  padding: 3px 10px;
  border-radius: 100px;
}

.project-tag--coming {
  color: var(--text-muted);
  background: transparent;
  border-color: var(--border);
}

.project-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  transition: all var(--duration-fast);
}

.project-link:hover {
  color: var(--accent);
  border-color: var(--border-accent);
  background: var(--accent-dim);
}

.project-links {
  display: flex;
  gap: 8px;
}

.project-icon {
  color: var(--accent);
  margin-bottom: 16px;
}

.project-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.project-card--featured .project-title {
  font-size: 1.4rem;
}

.project-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tech-pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 3px 10px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-muted);
}

.projects-footer {
  text-align: center;
}

/* ---------- Blog Section ---------- */
.blog {
  padding: var(--section-padding) 0;
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.blog::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 40% at 80% 60%, rgba(100,130,255,0.05), transparent);
  pointer-events: none;
}

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

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--duration-normal) var(--ease-out-expo);
  overflow: hidden;
}

.blog-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}

.blog-card-link { display: block; }

.blog-card-inner {
  padding: 28px;
}

.blog-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.blog-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.blog-reading-time {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.blog-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.4;
  transition: color var(--duration-fast);
}

.blog-card:hover .blog-title {
  color: var(--accent);
}

.blog-summary {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.blog-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.blog-tag {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  padding: 2px 8px;
  background: var(--accent-dim);
  border-radius: 4px;
  color: var(--accent);
}

.blog-read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--accent);
  font-weight: 500;
  transition: gap var(--duration-fast);
}

.blog-card:hover .blog-read-more {
  gap: 10px;
}

/* Empty state */
.blog-empty {
  text-align: center;
  padding: 80px 20px;
}

.blog-empty-icon {
  display: flex;
  justify-content: center;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.blog-empty-title {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.blog-empty-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 440px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---------- Contact Section ---------- */
.contact {
  padding: var(--section-padding) 0;
  position: relative;
  overflow: hidden;
}

.contact::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 50%, rgba(100,255,218,0.04), transparent);
  pointer-events: none;
}

.contact-inner {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.contact-description {
  font-size: clamp(0.95rem, 1.5vw, 1.05rem);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 48px;
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

.contact-grid {
  margin-top: 0;
}

.contact-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  text-align: left;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.contact-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
  background: var(--bg-card-hover);
}

.contact-card-icon {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-sm);
  color: var(--accent);
  transition: all var(--duration-normal);
}

.contact-card:hover .contact-card-icon {
  background: var(--accent);
  color: var(--bg-primary);
}

.contact-card-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
}

.contact-card-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.contact-card-value {
  font-size: 0.85rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color var(--duration-fast);
}

.contact-card:hover .contact-card-value {
  color: var(--text-primary);
}

.contact-card-arrow {
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform var(--duration-fast);
}

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

/* ---------- Contact Section (centered) ---------- */
.contact-inner {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.contact-open-btn {
  margin: 0 auto 48px;
  padding: 14px 32px;
  font-size: 0.95rem;
  gap: 10px;
}

.contact-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  text-align: left;
}

/* ---------- Modal Backdrop ---------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(5, 5, 10, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-in-out);
}

.modal-backdrop[hidden] {
  display: none;
}

.modal-backdrop.open {
  opacity: 1;
}

/* ---------- Modal Card ---------- */
.modal-card {
  width: 100%;
  max-width: 480px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: 0 24px 64px rgba(0,0,0,0.5), 0 0 0 1px rgba(100,255,218,0.04);
  transform: translateY(24px) scale(0.97);
  transition: transform var(--duration-slow) var(--ease-out-expo);
  overflow: hidden;
  max-height: 90svh;
  overflow-y: auto;
}

.modal-backdrop.open .modal-card {
  transform: translateY(0) scale(1);
}

[data-theme="light"] .modal-card {
  box-shadow: 0 24px 64px rgba(0,0,0,0.18);
}

/* ---------- Modal Header ---------- */
.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 28px 28px 0;
}

.modal-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

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

.modal-close {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast);
  margin-top: 2px;
}

.modal-close:hover {
  background: rgba(255,107,107,0.1);
  border-color: rgba(255,107,107,0.3);
  color: #ff6b6b;
}

/* ---------- Contact Form (inside modal) ---------- */
.contact-form {
  padding: 24px 28px 28px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.form-honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 18px;
}

.form-label {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--text-secondary);
}

.form-input {
  width: 100%;
  padding: 11px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.5;
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
  -webkit-appearance: none;
  appearance: none;
}

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

.form-input:hover { border-color: rgba(255,255,255,0.12); }

.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.form-input.invalid {
  border-color: #ff6b6b;
  box-shadow: 0 0 0 3px rgba(255,107,107,0.12);
}

[data-theme="light"] .form-input { background: #f0f0f6; }

.form-textarea {
  resize: vertical;
  min-height: 120px;
  max-height: 260px;
  font-family: var(--font-body);
}

.form-error {
  font-size: 0.76rem;
  color: #ff6b6b;
  min-height: 1em;
}

.form-submit {
  width: 100%;
  justify-content: center;
  padding: 13px 24px;
  font-size: 0.9rem;
  gap: 8px;
  margin-top: 4px;
}

.form-submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.submit-spinner {
  display: none;
  animation: spin 0.8s linear infinite;
}

.form-submit.submitting .submit-icon    { display: none; }
.form-submit.submitting .submit-spinner { display: block; }
.form-submit.submitting .submit-label   { opacity: 0.75; }

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

/* ---------- Success State ---------- */
.form-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 40px 28px 36px;
  gap: 10px;
}

.form-success[hidden] { display: none; }

.form-success-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 6px;
  animation: pop-in 0.4s var(--ease-out-expo);
}

@keyframes pop-in {
  from { transform: scale(0.5); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}

.form-success-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.form-success-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 300px;
}

.form-reset {
  margin-top: 10px;
  font-size: 0.85rem;
}

/* ---------- Responsive contact links ---------- */
@media (max-width: 600px) {
  .contact-links {
    grid-template-columns: 1fr;
  }
  .modal-header { padding: 22px 20px 0; }
  .contact-form { padding: 20px 20px 24px; }
  .form-success { padding: 32px 20px 28px; }
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 28px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-name {
  font-weight: 500;
  color: var(--text-secondary);
}

.footer-sep { color: var(--border); }

.footer-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.footer-link {
  font-size: 0.82rem;
  color: var(--text-muted);
  transition: color var(--duration-fast);
}

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

/* ---------- Animations ---------- */
[data-animate] {
  opacity: 0;
  will-change: transform, opacity;
}

[data-animate="fade-up"] {
  transform: translateY(32px);
}

[data-animate="fade-right"] {
  transform: translateX(-32px);
}

[data-animate="fade-left"] {
  transform: translateX(32px);
}

[data-animate].in-view {
  animation: animate-in var(--duration-slow) var(--ease-out-expo) forwards;
}

[data-animate-delay="100"].in-view { animation-delay: 100ms; }
[data-animate-delay="200"].in-view { animation-delay: 200ms; }
[data-animate-delay="300"].in-view { animation-delay: 300ms; }

@keyframes animate-in {
  to {
    opacity: 1;
    transform: translate(0, 0);
  }
}

/* ---------- Profile Placeholder SVG ---------- */
/* Handled in SVG file */

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 60px;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
    order: 2;
  }

  .hero-visual {
    order: 1;
  }

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

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

  .hero-description {
    max-width: 100%;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

  .project-card--featured {
    grid-column: 1 / -1;
  }

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

@media (max-width: 768px) {
  :root {
    --section-padding: 80px;
  }

  .nav-links {
    display: none;
    position: fixed;
    inset: 72px 0 0;
    background: rgba(10,10,15,0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: stretch;
    padding: 24px var(--container-pad);
    gap: 4px;
    z-index: 99;
  }

  .nav-links.open {
    display: flex;
    animation: slide-down 300ms var(--ease-out-expo);
  }

  [data-theme="light"] .nav-links {
    background: rgba(245,245,247,0.97);
  }

  @keyframes slide-down {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .nav-link, .nav-cta {
    width: 100%;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    margin: 0;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero {
    padding-top: 100px;
  }

  .profile-frame {
    width: 260px;
    height: 260px;
  }

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

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

  .contact-links {
    grid-template-columns: 1fr;
  }

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

  .footer-inner {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .profile-frame {
    width: 220px;
    height: 220px;
  }

  .experience-badge {
    left: -10px;
  }

  .location-badge {
    right: -10px;
  }
}

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