:root {
  --bg: #050816;
  --bg-alt: #0b1020;
  --card-bg: #111827;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.15);
  --text: #e5e7eb;
  --muted: #9ca3af;
  --border: #1f2933;
  --danger: #f97373;
  --success: #22c55e;
  --warning: #f59e0b;
  --radius-lg: 1.25rem;
  --radius-md: 0.75rem;
  --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.6);
  --shadow-glow: 0 0 30px rgba(56, 189, 248, 0.3);
  --transition-fast: 0.18s ease-out;
  --transition-slow: 0.4s ease-out;
  --body-bg: radial-gradient(circle at top, #111827 0, #020617 45%, #000 100%);
  --pattern-bg: radial-gradient(circle at 20% 80%, rgba(56, 189, 248, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(34, 197, 94, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 40% 40%, rgba(245, 158, 11, 0.1) 0%, transparent 50%);
}

[data-theme="light"] {
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --card-bg: #ffffff;
  --accent: #0ea5e9;
  --accent-soft: rgba(14, 165, 233, 0.1);
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --danger: #ef4444;
  --success: #16a34a;
  --warning: #d97706;
  --shadow-soft: 0 18px 40px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 30px rgba(14, 165, 233, 0.2);
  --body-bg: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  --pattern-bg: radial-gradient(circle at 20% 80%, rgba(14, 165, 233, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(22, 163, 74, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 40% 40%, rgba(217, 119, 6, 0.08) 0%, transparent 50%);
}

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

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
  background: var(--body-bg);
  color: var(--text);
  line-height: 1.6;
  transition: background 0.3s ease, color 0.3s ease;
  position: relative;
  overflow-x: hidden;
}



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

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

a:hover {
  text-decoration: underline;
}

h1, h2, h3, h4 {
  margin-top: 0;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-weight: 600;
}

/* Code-like elements */
.code-text {
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  font-weight: 400;
}

/* Layout */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 5rem 0;
}

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

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

[data-theme="dark"] .section-alt {
  background: linear-gradient(145deg, rgba(15,23,42,0.9), rgba(15,23,42,0.3));
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 2rem;
}

/* Header / Nav */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--border);
}

[data-theme="dark"] .site-header {
  background: linear-gradient(to right, rgba(15,23,42,0.9), rgba(15,23,42,0.8));
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--success));
  color: var(--bg);
  font-weight: 800;
  font-size: 1.2rem;
  box-shadow: 0 8px 25px rgba(56,189,248,0.4);
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.logo:hover {
  transform: scale(1.05);
  box-shadow: 0 12px 35px rgba(56,189,248,0.6);
}

[data-theme="light"] .logo {
  color: var(--text);
}

.main-nav {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.main-nav a {
  font-size: 0.9rem;
  color: var(--muted);
  padding: 0.6rem 1rem;
  border-radius: 8px;
  transition: all var(--transition-fast);
  position: relative;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.main-nav a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--success));
  transition: all var(--transition-fast);
  transform: translateX(-50%);
}

.main-nav a:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
  transform: translateY(-2px);
}

.main-nav a:hover::before {
  width: 100%;
}

[data-theme="dark"] .main-nav a:hover {
  background: rgba(15,23,42,0.8);
  color: var(--text);
}

.main-nav a.active {
  background: var(--accent-soft);
  color: var(--text);
  font-weight: 600;
}

.main-nav a.active::before {
  width: 100%;
  background: var(--accent);
}

/* Mobile nav */

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  padding: 0.4rem 0.7rem;
  font-size: 1.1rem;
  cursor: pointer;
}

.theme-toggle {
  background: none;
  border: 2px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  padding: 0.4rem 0.7rem;
  font-size: 1.1rem;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  position: relative;
  z-index: 10;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .theme-toggle:hover {
  background: rgba(15,23,42,0.8);
}

/* Hero */

.hero {
  padding: 6rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0,2fr) minmax(0,1.3fr);
  gap: 4rem;
  align-items: center;
  position: relative;
}

.hero-kicker {
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 1rem;
  font-weight: 600;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  border-right: 2px solid var(--accent);
  animation: typing 3s steps(40, end), blink-caret 0.75s step-end infinite;
}

@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes blink-caret {
  from, to { border-color: transparent; }
  50% { border-color: var(--accent); }
}

.hero-kicker::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 30px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--success));
  border-radius: 1px;
}

.hero h1 {
  font-size: clamp(3rem, 6vw, 4.5rem);
  margin-bottom: 1rem;
  font-weight: 800;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  color: var(--muted);
  max-width: 32rem;
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.hero-sub strong {
  color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  background: var(--accent-soft);
  padding: 0.1rem 0.3rem;
  border-radius: 0.25rem;
  font-size: 0.95em;
}

.hero-actions {
  margin-top: 2rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

.hero-image-wrapper {
  justify-self: center;
  position: relative;
}

.hero-image {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--accent);
  box-shadow: var(--shadow-glow), var(--shadow-soft);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
  position: relative;
  z-index: 2;
}

.hero-image:hover {
  transform: scale(1.05) rotate(2deg);
  box-shadow: 0 0 50px rgba(56, 189, 248, 0.4), var(--shadow-soft);
}

.hero-image-wrapper::before {
  content: '';
  position: absolute;
  top: -10px;
  left: -10px;
  right: -10px;
  bottom: -10px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, var(--accent), var(--success), var(--warning), var(--accent));
  z-index: 1;
  opacity: 0.6;
}

/* Sections */

.section {
  padding: 5rem 0;
}



.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-lg);
  padding: 2rem 1.8rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--success), var(--warning));
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
  border-color: var(--accent);
}

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

[data-theme="dark"] .card {
  background: radial-gradient(circle at top left, rgba(56,189,248,0.06), rgba(15,23,42,0.95));
  border: 1px solid rgba(15,23,42,0.9);
  box-shadow: 0 18px 40px rgba(15,23,42,0.9);
}

.card h3 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  position: relative;
}

.card h3::before {
  content: '▸';
  position: absolute;
  left: -1.2rem;
  color: var(--accent);
  font-weight: bold;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.card:hover h3::before {
  opacity: 1;
}

.card p {
  color: var(--muted);
  line-height: 1.6;
  margin: 0;
}

.project-card {
  position: relative;
}

.project-card .project-tech {
  font-size: 0.8rem;
  color: var(--accent);
  margin-top: 1rem;
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.project-card:hover .project-tech {
  color: var(--success);
}

/* About */

.about-grid {
  display: grid;
  grid-template-columns: minmax(0,2.1fr) minmax(0,1.1fr);
  gap: 2.5rem;
}

.about-aside {
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--border);
}

[data-theme="dark"] .about-aside {
  background: rgba(15,23,42,0.9);
}

/* Contact */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0,2fr) minmax(0,1.2fr);
  gap: 2.5rem;
}

.contact-form {
  margin-top: 1.5rem;
}

.form-group {
  margin-bottom: 1rem;
}

label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
  color: var(--muted);
}

input, textarea {
  width: 100%;
  border-radius: 0.75rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
  font-size: 0.95rem;
}

[data-theme="dark"] input, [data-theme="dark"] textarea {
  background: rgba(15,23,42,0.9);
}

input:focus, textarea:focus {
  outline: 1px solid var(--accent);
  border-color: var(--accent);
}

/* Project detail */

.project-detail h1 {
  margin-bottom: 0.25rem;
}

.project-meta {
  color: var(--muted);
  margin-bottom: 1.5rem;
}

.project-detail h2 {
  margin-top: 1.8rem;
}

pre {
  background: #f8fafc;
  border-radius: 0.8rem;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  border: 1px solid var(--border);
}

[data-theme="dark"] pre {
  background: #020617;
}

.project-links-bottom {
  margin-top: 1.5rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.project-links-bottom .btn {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text);
}

[data-theme="light"] .project-links-bottom .btn {
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  color: #334155;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.project-links-bottom .btn:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--text);
}

/* Resume */

.resume-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.skills-list {
  columns: 2;
  column-gap: 2rem;
}

/* Buttons & Links */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  font-family: inherit;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--success));
  color: var(--bg);
  font-weight: 700;
  box-shadow: 0 8px 25px rgba(56,189,248,0.4);
  border: 2px solid transparent;
}

.btn.primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 35px rgba(56,189,248,0.6);
  background: linear-gradient(135deg, var(--success), var(--accent));
}

.btn.ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
  backdrop-filter: blur(10px);
}

.btn.ghost:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--text);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(56,189,248,0.2);
}

.btn.small {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  border-radius: 8px;
}

.link {
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 500;
  position: relative;
  transition: color var(--transition-fast);
}

.link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--success));
  transition: width var(--transition-fast);
}

.link:hover::after {
  width: 100%;
}

/* CTA */

.cta {
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}

/* Footer */

.site-footer {
  border-top: 2px solid var(--border);
  padding: 3rem 0 2rem;
  background: rgba(255, 255, 255, 0.95);
  margin-top: 4rem;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent 30%, rgba(56, 189, 248, 0.02) 50%, transparent 70%);
  pointer-events: none;
}

[data-theme="dark"] .site-footer {
  background: rgba(5,8,22,0.96);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  align-items: center;
  font-size: 0.9rem;
  position: relative;
  z-index: 1;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--muted);
  font-size: 1.1rem;
  transition: color var(--transition-fast), transform var(--transition-fast);
  padding: 0.5rem;
  border-radius: 8px;
}

.footer-links a:hover {
  color: var(--accent);
  transform: translateY(-2px);
  background: var(--accent-soft);
}

/* Modal Background */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

/* Project Demo Styles */

.demo-container {
  margin: 2rem 0;
}

.terminal {
  background: #1e1e1e;
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  overflow: hidden;
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
  margin-bottom: 1.5rem;
}

[data-theme="light"] .terminal {
  background: #f8f8f8;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.terminal-header {
  background: #2d2d2d;
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

[data-theme="light"] .terminal-header {
  background: #e8e8e8;
}

.terminal-buttons {
  display: flex;
  gap: 0.5rem;
}

.terminal-button {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: block;
}

.terminal-button.red {
  background: #ff5f57;
}

.terminal-button.yellow {
  background: #ffbd2e;
}

.terminal-button.green {
  background: #28ca42;
}

.terminal-title {
  color: #cccccc;
  font-size: 0.85rem;
  font-weight: 500;
}

[data-theme="light"] .terminal-title {
  color: #666666;
}

.terminal-body {
  padding: 1rem;
  min-height: 300px;
  max-height: 400px;
  overflow-y: auto;
}

.terminal-output {
  color: #f8f8f2;
  font-size: 0.9rem;
  line-height: 1.4;
}

[data-theme="light"] .terminal-output {
  color: #2d2d2d;
}

.terminal-line {
  white-space: pre-wrap;
  word-wrap: break-word;
}

.terminal-prompt {
  display: inline;
}

.cursor {
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.demo-controls {
  margin-top: 1.5rem;
}

.demo-scenarios {
  margin-bottom: 1rem;
}

.demo-scenarios h4 {
  margin: 0 0 0.5rem 0;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
}

.scenario-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.scenario-buttons .btn {
  padding: 0.5rem;
  font-size: 0.8rem;
  text-align: center;
  white-space: nowrap;
}

.control-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.demo-btn {
  min-width: 100px;
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
}

.modal-content {
  background-color: var(--card-bg);
  margin: 5% auto;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 1000px;
  max-height: 90vh;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
}

.modal-header h3 {
  margin: 0;
  color: var(--text);
  font-size: 1.25rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--muted);
  cursor: pointer;
  padding: 0;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.25rem;
  transition: all 0.2s ease;
}

[data-theme="light"] .modal-close {
  color: #64748b;
}

.modal-close:hover {
  background: var(--accent-soft);
  color: var(--text);
}

.modal-body {
  padding: 2rem;
  max-height: calc(90vh - 80px);
  overflow-y: auto;
}

/* Responsive */

@media (max-width: 900px) {
  .hero-grid,
  .about-grid,
  .contact-grid {
    grid-template-columns: minmax(0,1fr);
  }

  .hero-image {
    width: 220px;
    height: 220px;
  }

  .grid-3 {
    grid-template-columns: minmax(0,1fr);
  }

  .skills-list {
    columns: 1;
  }
}

@media (max-width: 720px) {
  .main-nav {
    position: absolute;
    right: 1.25rem;
    top: 3.4rem;
    padding: 0.7rem;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 1rem;
    border: 1px solid var(--border);
    display: none;
  }

  [data-theme="dark"] .main-nav {
    background: rgba(15,23,42,0.99);
  }

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

  .nav-toggle {
    display: inline-flex;
  }

  /* Theme toggle remains visible on mobile */
  .theme-toggle {
    display: inline-flex;
    margin-right: 0.5rem;
  }

  .resume-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-content {
    flex-direction: column;
    align-items: flex-start;
  }

  .terminal-body {
    min-height: 250px;
    max-height: 300px;
  }

  .control-buttons {
    flex-direction: column;
  }

  .control-buttons .btn {
    width: 100%;
    min-width: unset;
  }

  .demo-note {
    font-size: 0.85rem;
  }

  .modal-content {
    margin: 2% auto;
    width: 95%;
    max-height: 95vh;
  }

  .modal-header {
    padding: 1rem 1.5rem;
  }

  .modal-body {
    padding: 1.5rem;
    max-height: calc(95vh - 70px);
  }
}