/* ========================================
   Portfolio Dev — Dark Theme Stylesheet
   ======================================== */

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

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111119;
  --bg-card: #16161f;
  --bg-card-hover: #1c1c28;
  --text-primary: #e8e8ed;
  --text-secondary: #9a9ab0;
  --text-muted: #5a5a72;
  --accent: #6c5ce7;
  --accent-light: #a29bfe;
  --accent-glow: rgba(108, 92, 231, 0.3);
  --border: #222233;
  --border-light: #2a2a3d;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

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

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

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

/* --- Layout --- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

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

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 60px;
  text-align: center;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: var(--accent);
  margin: 16px auto 0;
  border-radius: 2px;
}

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border);
  padding: 10px 0;
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary) !important;
  letter-spacing: -0.5px;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 36px;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

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

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  font-family: var(--font-main);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border-light);
}

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

.btn-full {
  width: 100%;
  text-align: center;
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-greeting {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent-light);
  margin-bottom: 12px;
}

.hero-name {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 12px;
  letter-spacing: -1.5px;
}

.hero-title {
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.hero-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 480px;
  margin-bottom: 36px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Hero Avatar */
.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-avatar {
  position: relative;
  width: 280px;
  height: 280px;
}

.avatar-placeholder {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  position: relative;
  z-index: 2;
}

.avatar-placeholder svg {
  width: 80px;
  height: 80px;
}

.avatar-ring {
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  border: 2px dashed var(--accent);
  opacity: 0.3;
  animation: spin 30s linear infinite;
}

.avatar-dots span {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  z-index: 3;
}

.avatar-dots span:nth-child(1) { top: -5px; left: 50%; transform: translateX(-50%); }
.avatar-dots span:nth-child(2) { bottom: -5px; left: 50%; transform: translateX(-50%); }
.avatar-dots span:nth-child(3) { left: -5px; top: 50%; transform: translateY(-50%); }
.avatar-dots span:nth-child(4) { right: -5px; top: 50%; transform: translateY(-50%); }

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-arrow {
  width: 24px;
  height: 38px;
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  position: relative;
}

.scroll-arrow::after {
  content: '';
  position: absolute;
  width: 4px;
  height: 8px;
  background: var(--text-muted);
  border-radius: 2px;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollBounce 2s ease-in-out infinite;
}

/* --- About --- */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: start;
}

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

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

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

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition);
}

.stat-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

.stat-number {
  display: block;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent-light);
  font-family: var(--font-mono);
  line-height: 1;
  margin-bottom: 8px;
}

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

/* --- Projects --- */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.project-image {
  aspect-ratio: 5/3;
  overflow: hidden;
  background: var(--bg-primary);
}

.project-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.project-placeholder svg {
  width: 100%;
  height: 100%;
}

.project-info {
  padding: 28px;
}

.project-info h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.project-info p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 18px;
  line-height: 1.6;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.project-tags span {
  font-size: 0.78rem;
  padding: 4px 12px;
  background: rgba(108, 92, 231, 0.12);
  color: var(--accent-light);
  border-radius: 20px;
  font-weight: 500;
}

.project-links {
  display: flex;
  gap: 20px;
}

.project-link {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
}

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

/* --- Skills --- */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all var(--transition);
}

.skill-category:hover {
  border-color: var(--border-light);
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

.skill-category-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.skill-icon {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--accent);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.skill-tag {
  position: relative;
  font-size: 0.88rem;
  padding: 8px 18px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition);
  overflow: hidden;
}

.skill-tag::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: var(--accent);
  transition: width 0.6s ease;
}

.skill-tag.revealed::before {
  width: var(--level, 0%);
}

.skill-tag:hover {
  border-color: var(--accent);
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 60px;
  align-items: start;
}

.contact-info p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text-secondary);
}

.contact-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-light);
  flex-shrink: 0;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
}

.form-group {
  margin-bottom: 22px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 0.95rem;
  transition: border-color var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* --- Footer --- */
.footer {
  padding: 40px 0;
  text-align: center;
  border-top: 1px solid var(--border);
}

.footer p {
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* --- Animations --- */
@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
  50% { transform: translateX(-50%) translateY(10px); opacity: 0.3; }
}

/* Entrance Animations */
.animate-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.delay-1 { transition-delay: 0.15s; }
.delay-2 { transition-delay: 0.3s; }
.delay-3 { transition-delay: 0.45s; }
.delay-4 { transition-delay: 0.6s; }

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* --- Responsive --- */
@media (max-width: 900px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

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

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

  .hero-visual {
    order: -1;
  }

  .hero-avatar {
    width: 200px;
    height: 200px;
  }

  .hero-name {
    font-size: 2.5rem;
  }

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

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

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

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

@media (max-width: 600px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 20px 24px;
    gap: 0;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links li a {
    display: block;
    padding: 12px 0;
  }

  .nav-toggle {
    display: flex;
  }

  .section {
    padding: 70px 0;
  }

  .section-title {
    font-size: 1.6rem;
    margin-bottom: 40px;
  }

  .hero-name {
    font-size: 2rem;
  }

  .hero-title {
    font-size: 1.2rem;
  }

  .about-stats {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .stat-card {
    padding: 20px 14px;
  }

  .stat-number {
    font-size: 1.6rem;
  }

  .contact-form {
    padding: 24px;
  }
}