/* ===== CSS Custom Properties ===== */
:root {
  --bg-base: #0a0a0f;
  --bg-elevated: rgba(18, 18, 28, 0.95);
  --bg-card: rgba(22, 22, 35, 0.9);
  --bg-nav: rgba(10, 10, 18, 0.88);
  --accent: #22d3ee;
  --accent-hover: #67e8f9;
  --accent-muted: rgba(34, 211, 238, 0.15);
  --accent-glow: rgba(34, 211, 238, 0.25);
  --text: #f4f4f5;
  --text-muted: rgba(244, 244, 245, 0.75);
  --text-faint: rgba(244, 244, 245, 0.5);
  --border: rgba(255, 255, 255, 0.06);
  --radius: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 40px -12px rgba(0, 0, 0, 0.5);
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 5rem;
  --section-block: 5rem;
  --section-inline: 1.5rem;
  --transition: 0.2s ease;
  --transition-slow: 0.35s ease;
}

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

html {
  scroll-behavior: smooth;
}

/* Anchor targets: leave room for sticky nav */
section[id] {
  scroll-margin-top: 80px;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ===== Skip link ===== */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-sm);
  padding: var(--space-xs) var(--space-md);
  background: var(--accent);
  color: white;
  text-decoration: none;
  border-radius: var(--radius);
  z-index: 10000;
  transition: top var(--transition);
}
.skip-link:focus {
  top: var(--space-sm);
}

/* ===== Navbar ===== */
.navbar-container {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 64px;
  padding: var(--space-sm);
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.navbar {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-xs) var(--space-md);
  background: var(--bg-card);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.nav-badge {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--accent-muted);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.nav-location {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.nav-pin-icon {
  flex-shrink: 0;
  opacity: 0.9;
}

.nav-time {
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}

.navbar-link {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  transition: color var(--transition), background var(--transition);
}

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

.navbar-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Mobile menu button – hidden on desktop */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: var(--radius);
  color: var(--text);
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: var(--section-block) var(--section-inline);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: url("Assets/images/purple.gif") center / cover no-repeat;
  background-attachment: fixed;
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 10, 15, 0.7) 0%, rgba(10, 10, 15, 0.92) 60%, var(--bg-base) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
}

.hero-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-md);
}

.about-image {
  margin-bottom: var(--space-lg);
}

.hero-content .about-image img {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid var(--accent-muted);
  box-shadow: 0 0 40px var(--accent-glow);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

.hero-content .about-image img:hover {
  transform: scale(1.04);
  box-shadow: 0 0 50px var(--accent-glow);
}

.hero-content h1 {
  font-size: clamp(2rem, 5.5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 var(--space-sm);
  letter-spacing: -0.03em;
}

.hero-name {
  display: block;
  background: linear-gradient(135deg, var(--text) 0%, var(--text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: clamp(0.95rem, 2.2vw, 1.1rem);
  line-height: 1.6;
  color: var(--text-muted);
  margin: 0 auto var(--space-xl);
  max-width: 480px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
}

.hero-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.35rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--bg-base);
  background: var(--text);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: transform var(--transition), background var(--transition), color var(--transition);
  border: 2px solid transparent;
}

.hero-button:hover {
  transform: translateY(-2px);
  background: var(--accent);
  color: var(--bg-base);
}

.hero-button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.hero-button-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.hero-button-outline:hover {
  background: var(--accent-muted);
  border-color: var(--accent);
  color: var(--accent-hover);
}

.hero-button-ghost {
  background: transparent;
  color: var(--text-muted);
}

.hero-button-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

/* ===== Section labels ===== */
.section-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 var(--space-xs);
}

/* ===== About ===== */
.about .section-label {
  text-align: center;
}

.about {
  padding: var(--section-block) var(--section-inline);
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.about h2 {
  font-size: clamp(1.65rem, 4vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-sm);
}

.about-education {
  font-size: 0.9rem;
  font-family: var(--font-mono);
  color: var(--accent);
  margin: 0 0 var(--space-lg);
}

.about-text {
  margin-bottom: var(--space-xl);
}

.about-text p {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin: 0 0 var(--space-md);
}

.skills-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: var(--space-sm);
  list-style: none;
  padding: 0;
  margin: 0;
  max-width: 720px;
  margin-inline: auto;
}

.skills-list li {
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  transition: background var(--transition), transform var(--transition), border-color var(--transition), color var(--transition);
}

.skills-list li:hover {
  background: var(--accent-muted);
  border-color: var(--accent);
  color: var(--text);
  transform: translateY(-2px);
}

/* ===== Projects ===== */
.projects-section {
  padding: var(--section-block) var(--section-inline);
}

.projects {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.projects .section-label {
  text-align: center;
}

.projects h2 {
  font-size: clamp(1.65rem, 4vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-sm);
}

.projects-intro {
  color: var(--text-muted);
  margin: 0 0 var(--space-xl);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.project-card {
  --card-bg: url("Assets/images/Other.gif");
  position: relative;
  display: block;
  min-height: 220px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition);
}

/* Background on ::after so we can filter it per-card without affecting text */
.project-card::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: var(--card-bg) center / cover no-repeat;
  pointer-events: none;
}

.project-card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.75) 50%, rgba(0, 0, 0, 0.92) 100%);
  pointer-events: none;
}

/* TraveList card: ByteCard.gif with hue shifted to green/teal */
.project-card-travelist::after {
  filter: hue-rotate(100deg);
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--border);
  border-color: var(--accent-muted);
}

.project-card-overlay {
  position: relative;
  z-index: 2;
  height: 100%;
  min-height: 220px;
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: var(--text);
}

.project-tags {
  display: inline-block;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--accent);
  margin-bottom: var(--space-xs);
  opacity: 0.95;
}

.project-card-overlay h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 var(--space-xs);
  letter-spacing: -0.01em;
}

.project-card-overlay p {
  font-size: 0.875rem;
  margin: 0;
  color: var(--text-muted);
  line-height: 1.5;
}

.project-card-featured {
  border-color: rgba(34, 211, 238, 0.3);
}
.project-card-featured:hover {
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(34, 211, 238, 0.25);
}

/* ===== Contact ===== */
.contact {
  padding: var(--section-block) var(--section-inline);
  text-align: center;
  background: linear-gradient(180deg, var(--bg-base) 0%, rgba(18, 25, 35, 0.97) 100%);
  border-top: 1px solid var(--border);
}

.contact-inner {
  max-width: 560px;
  margin: 0 auto;
}

.contact .section-label {
  text-align: center;
}

.contact h2 {
  font-size: clamp(1.65rem, 4vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-sm);
}

.contact-lead {
  color: var(--text-muted);
  font-size: 1rem;
  margin: 0 0 var(--space-xl);
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-lg);
}

.contact-link {
  display: inline-flex;
  color: var(--text);
  transition: transform var(--transition), color var(--transition);
}

.contact-link .contact-icon {
  width: 44px;
  height: 44px;
  opacity: 0.85;
  transition: opacity var(--transition);
}

.contact-link:hover {
  transform: scale(1.1);
}

.contact-link:hover .contact-icon {
  opacity: 1;
}

.contact-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--bg-base);
  background: var(--accent);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: background var(--transition), transform var(--transition), color var(--transition);
  border: none;
}

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

.contact-button-arrow {
  transition: transform var(--transition);
}
.contact-button:hover .contact-button-arrow {
  transform: translateX(4px);
}

.contact-button:focus-visible {
  outline: 2px solid var(--accent-hover);
  outline-offset: 2px;
}

/* ===== Footer ===== */
.footer {
  padding: var(--space-lg);
  text-align: center;
  background: var(--bg-nav);
  border-top: 1px solid var(--border);
}

.footer p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ===== Responsive: tablet ===== */
@media (max-width: 768px) {
  .skills-list {
    grid-template-columns: repeat(2, 1fr);
  }

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

/* ===== Responsive: mobile nav ===== */
@media (max-width: 600px) {
  :root {
    --section-block: 3.5rem;
  }

  .navbar-container {
    min-height: 48px;
    padding: 0.5rem var(--space-sm);
  }

  .navbar {
    width: auto;
    max-width: 280px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 0;
    padding: 0.35rem 0.5rem;
    transition: border-radius var(--transition);
  }

  .navbar.is-open {
    width: 100%;
    max-width: 100%;
    flex-direction: column;
    align-items: stretch;
    padding: 0.5rem;
    border-radius: var(--radius-lg);
  }

  .navbar-link {
    display: none;
    width: 100%;
    text-align: center;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    color: var(--text);
  }

  .navbar.is-open .navbar-link {
    display: block;
  }

  .navbar.is-open .navbar-link:hover {
    background: var(--accent-muted);
  }

  .nav-badge {
    display: none;
  }

  .nav-location {
    display: none;
  }

  .nav-toggle {
    display: flex;
    order: -1;
    width: 36px;
    height: 36px;
    margin-left: 0;
  }

  .nav-toggle-bar {
    width: 18px;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .hero {
    min-height: 80vh;
    padding: var(--space-xl) var(--space-sm);
  }

  .hero-content .about-image img {
    width: 130px;
    height: 130px;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-button {
    width: 100%;
    max-width: 260px;
  }

  .about,
  .projects-section,
  .contact {
    padding: var(--section-block) var(--space-sm);
  }

  .contact-links {
    flex-direction: column;
    gap: var(--space-md);
  }
}

/* ===== Small phones ===== */
@media (max-width: 380px) {
  .skills-list {
    grid-template-columns: 1fr;
  }
}