/* ============================================
   Design Philosophy:
   "Terminal Elegance" - The precision of a CLI
   meets modern web aesthetics. Dark canvas,
   carefully chosen accent color, generous
   whitespace, and purposeful motion.
   ============================================ */

:root {
  --bg-primary: #0a0f1a;
  --bg-secondary: #111827;
  --bg-card: #151d2e;
  --bg-card-hover: #1a2540;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #38bdf8;
  --accent-dim: rgba(56, 189, 248, 0.1);
  --accent-glow: rgba(56, 189, 248, 0.15);
  --border: #1e293b;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 1100px;
  --nav-height: 64px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #7dd3fc;
}

ul {
  list-style: none;
}

/* Cursor glow */
.cursor-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  z-index: 0;
  opacity: 0;
  transition: opacity 0.3s;
}

/* ---- NAVIGATION ---- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 100;
  background: rgba(10, 15, 26, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

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

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

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

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

.nav-links a {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-secondary);
  transition: color 0.2s;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

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

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

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ---- HERO ---- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  max-width: var(--max-width);
  margin: 0 auto;
  gap: 60px;
  position: relative;
}

.hero-content {
  flex: 1;
  max-width: 560px;
}

.hero-greeting {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: 12px;
}

.hero-name {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.hero-description {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 480px;
}

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

/* Terminal in hero */
.hero-terminal {
  flex: 1;
  max-width: 440px;
}

.terminal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.3);
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(30, 41, 59, 0.5);
  border-bottom: 1px solid var(--border);
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-dot.red { background: #ef4444; }
.terminal-dot.yellow { background: #eab308; }
.terminal-dot.green { background: #22c55e; }

.terminal-title {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.terminal-body {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  min-height: 200px;
}

.terminal-line {
  display: flex;
  align-items: center;
  gap: 8px;
}

.terminal-prompt {
  color: var(--accent);
  user-select: none;
}

.terminal-command {
  color: var(--text-primary);
}

.terminal-cursor {
  animation: blink 0.8s step-end infinite;
  color: var(--accent);
  font-weight: 300;
}

.terminal-output {
  margin-top: 12px;
  color: var(--text-secondary);
  line-height: 1.6;
  white-space: pre-wrap;
}

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

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

.btn-primary:hover {
  background: #7dd3fc;
  color: var(--bg-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(56, 189, 248, 0.3);
}

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

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

.btn-lg {
  padding: 16px 40px;
  font-size: 1rem;
}

/* ---- SECTIONS ---- */
.section {
  padding: 100px 24px;
  position: relative;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: 48px;
  letter-spacing: -0.02em;
}

.section-number {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
  margin-right: 12px;
  font-weight: 400;
}

/* ---- ABOUT ---- */
.about-content {
  max-width: 640px;
}

.about-content p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 1rem;
}

/* ---- SKILLS ---- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  transition: all 0.3s;
}

.skill-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(56, 189, 248, 0.2);
  transform: translateY(-4px);
}

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

.skill-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.skill-list li {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding: 3px 0;
}

/* ---- PROJECTS ---- */
.project-featured {
  margin-bottom: 48px;
}

.project-featured-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  position: relative;
  overflow: hidden;
}

.project-featured-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #818cf8, var(--accent));
  background-size: 200% 100%;
  animation: shimmer 3s linear infinite;
}

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

.project-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 8px;
}

.project-featured-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.project-featured-desc {
  max-width: 560px;
  margin-bottom: 20px;
}

.project-featured-desc p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.project-tech li {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 4px 12px;
  border-radius: 100px;
}

.project-links {
  margin-top: 20px;
}

.project-links a {
  color: var(--text-secondary);
  transition: color 0.2s;
}

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

.project-stars {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  color: #eab308;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* Project grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s;
}

.project-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(56, 189, 248, 0.2);
  transform: translateY(-4px);
}

.project-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
}

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

.project-card-links {
  display: flex;
  gap: 12px;
}

.project-card-links a {
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.project-private-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  background: rgba(100, 116, 139, 0.15);
  padding: 3px 10px;
  border-radius: 100px;
  border: 1px solid rgba(100, 116, 139, 0.2);
}

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

.project-card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}

/* ---- CONTACT ---- */
.contact-inner {
  text-align: center;
}

.contact-text {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 480px;
  margin: 0 auto 32px;
}

.contact-socials {
  margin-top: 32px;
  display: flex;
  justify-content: center;
  gap: 20px;
}

.contact-socials a {
  color: var(--text-muted);
  transition: all 0.2s;
}

.contact-socials a:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

/* ---- FOOTER ---- */
.footer {
  text-align: center;
  padding: 32px 24px;
  border-top: 1px solid var(--border);
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  transition: color 0.2s;
}

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

.footer-sep {
  color: var(--border);
  font-size: 0.8rem;
}

.footer p {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---- ANIMATIONS ---- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    padding: 120px 24px 60px;
    min-height: auto;
    gap: 40px;
  }

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

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

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 15, 26, 0.98);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 40px;
  }

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

  .nav-links a {
    font-size: 1.1rem;
  }

  .nav-toggle {
    display: flex;
  }

  .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);
  }

  .section {
    padding: 60px 20px;
  }

  .project-featured-content {
    padding: 24px;
  }

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

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

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

  .hero-cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}