/* ============================================
   Portfolio — Dark Modern Theme
   ============================================ */

:root {
  --bg: #0a0a0f;
  --bg-card: #12121a;
  --bg-card-hover: #1a1a25;
  --bg-section-alt: #0e0e16;
  --surface: #16161f;
  --border: #1e1e2e;
  --border-hover: #2a2a3d;
  --text: #e4e4ec;
  --text-muted: #8888a0;
  --text-dim: #5c5c72;
  --accent: #6c63ff;
  --accent-hover: #7f78ff;
  --accent-glow: rgba(108, 99, 255, 0.15);
  --accent-2: #00d4aa;
  --green: #22c55e;
  --yellow: #eab308;
  --blue: #3b82f6;
  --red: #ef4444;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

::selection {
  background: var(--accent);
  color: #fff;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

/* ============================================
   Navigation
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.nav.scrolled {
  border-bottom-color: var(--border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

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

.nav-links a.active {
  position: relative;
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-muted);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-mobile {
  display: none;
  flex-direction: column;
  padding: 16px 24px 24px;
  gap: 16px;
  border-top: 1px solid var(--border);
}

.nav-mobile a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 500;
}

.nav-mobile.open {
  display: flex;
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
}

/* ============================================
   Hero
   ============================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

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

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(108, 99, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(108, 99, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
}

.glow-1 {
  width: 600px;
  height: 600px;
  background: var(--accent);
  top: -200px;
  right: -100px;
  opacity: 0.08;
}

.glow-2 {
  width: 500px;
  height: 500px;
  background: var(--accent-2);
  bottom: -200px;
  left: -100px;
  opacity: 0.06;
}

.mouse-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(108, 99, 255, 0.08), transparent 70%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 0;
}

.hero:hover .mouse-glow {
  opacity: 1;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 120px 24px 80px;
}

/* Hero load animation */
.hero-greeting,
.hero-name,
.hero-desc,
.hero-actions,
.hero-stats {
  opacity: 0;
  transform: translateY(24px);
  animation: heroFadeIn 0.7s ease forwards;
}

.hero-greeting  { animation-delay: 0.1s; }
.hero-name      { animation-delay: 0.25s; }
.hero-desc      { animation-delay: 0.4s; }
.hero-actions   { animation-delay: 0.55s; }
.hero-stats     { animation-delay: 0.7s; }

@keyframes heroFadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-greeting {
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 16px;
  letter-spacing: 1px;
}

/* Typing cursor */
.typing-text::after {
  content: '|';
  color: var(--accent);
  font-weight: 300;
  animation: blink 0.8s step-end infinite;
  margin-left: 2px;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* Animated gradient on hero accent */
.hero-accent {
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent));
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradientShift 4s linear infinite;
}

@keyframes gradientShift {
  0% { background-position: 0% center; }
  100% { background-position: 200% center; }
}

.hero-name {
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -2px;
  margin-bottom: 24px;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  font-family: var(--font);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 24px rgba(108, 99, 255, 0.3);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 8px 32px rgba(108, 99, 255, 0.4);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-full {
  width: 100%;
}

.hero-stats {
  display: flex;
  gap: 48px;
  justify-content: center;
}

.stat {
  text-align: center;
}

.stat-num {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.scroll-arrow {
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--text-dim);
  border-bottom: 2px solid var(--text-dim);
  transform: rotate(45deg);
  animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: rotate(45deg) translateY(0); opacity: 0.5; }
  50% { transform: rotate(45deg) translateY(8px); opacity: 1; }
}

/* ============================================
   Sections
   ============================================ */

.section {
  padding: 100px 0;
}

.section-dark {
  background: var(--bg-section-alt);
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 56px;
  font-size: 1.05rem;
}

/* ============================================
   About
   ============================================ */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
  margin-top: 48px;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

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

.partner-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.partner-link:hover {
  border-bottom-color: var(--accent);
}

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

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all var(--transition);
}

.about-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.about-card-icon {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.about-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.about-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* ============================================
   Projects
   ============================================ */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 24px;
}

.project-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.project-card {
  transform-style: preserve-3d;
  perspective: 800px;
}

.project-card:hover {
  border-color: var(--accent);
  box-shadow: 0 12px 40px rgba(108, 99, 255, 0.08);
}

.project-card .card-shine {
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(108, 99, 255, 0.06), transparent 60%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.project-featured {
  grid-column: 1 / -1;
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(108, 99, 255, 0.05), transparent);
}

@media (min-width: 769px) {
  .project-featured {
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto 1fr auto auto;
  }
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.project-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-production {
  background: rgba(34, 197, 94, 0.12);
  color: var(--green);
}

.badge-active {
  background: rgba(59, 130, 246, 0.12);
  color: var(--blue);
}

.badge-complete {
  background: rgba(234, 179, 8, 0.12);
  color: var(--yellow);
}

.badge-dev {
  background: rgba(239, 68, 68, 0.12);
  color: var(--red);
}

.project-type {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.project-name {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.project-desc {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 20px;
  flex-grow: 1;
  line-height: 1.7;
}

.project-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.project-features span {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: var(--accent-glow);
  color: var(--accent);
  border-radius: 20px;
  font-weight: 500;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.tech-tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 4px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  color: var(--text-muted);
  font-weight: 500;
}

.project-footer {
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

.project-arch {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-family: var(--mono);
}

@media (max-width: 480px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .mouse-glow { display: none; }
  .back-to-top { bottom: 20px; right: 20px; width: 42px; height: 42px; }
}

/* ============================================
   Tech Stack
   ============================================ */

.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
  margin-top: 48px;
}

.stack-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.stack-category h3 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin-bottom: 20px;
  font-weight: 600;
}

.stack-items {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.stack-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stack-name {
  font-size: 0.9rem;
  font-weight: 600;
}

.stack-bar {
  height: 6px;
  background: var(--surface);
  border-radius: 3px;
  overflow: hidden;
}

.stack-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 3px;
  width: 0;
  transition: width 1.2s cubic-bezier(0.22, 1, 0.36, 1);
}

.stack-fill.animate {
  /* width set inline */
}

/* ============================================
   Contact
   ============================================ */

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

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

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: var(--font);
  transition: border-color var(--transition);
  resize: vertical;
}

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

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

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.contact-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.contact-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.92rem;
  transition: all var(--transition);
}

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

.contact-link-soon {
  opacity: 0.5;
  cursor: default;
  pointer-events: none;
}

.contact-link-icon {
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow);
  border-radius: var(--radius-xs);
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Back to Top
   ============================================ */

.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: all var(--transition);
  z-index: 90;
  backdrop-filter: blur(8px);
}

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

.back-to-top:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(108, 99, 255, 0.2);
}

/* ============================================
   Footer
   ============================================ */

.footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 16px;
}

.footer-links a {
  color: var(--text-dim);
  transition: color var(--transition);
  display: flex;
  align-items: center;
}

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

.footer p {
  font-size: 0.85rem;
  color: var(--text-dim);
  font-family: var(--mono);
}

/* ============================================
   Animations
   ============================================ */

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.project-card { opacity: 0; transform: translateY(24px); }
.project-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stack-category { opacity: 0; transform: translateY(24px); }
.stack-category.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.about-card { opacity: 0; transform: translateY(16px); }
.about-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

/* ============================================
   Scrollbar
   ============================================ */

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-dim);
}