/* ============================================
   LeaCoder0 — Cozy, sci-fi, editorial
   All theme values are CSS variables for the side pane.
   ============================================ */

:root {
  /* Default accent (violet); overridden by pane or localStorage */
  --accent: #a78bfa;
  --accent-dim: rgba(167, 139, 250, 0.18);
  --accent-glow: rgba(167, 139, 250, 0.25);
  --font-head: 'DM Serif Display', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --max-width: 48rem;
  --space: 1.25rem;
}

/* System (default): follow prefers-color-scheme */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --bg: #faf8f5;
    --surface: #fff;
    --surface-hover: #f5f2ed;
    --text: #1a1a1a;
    --text-muted: #5c5c5c;
    --border: #e5e2dd;
  }
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #0d0d0d;
    --surface: #161616;
    --surface-hover: #1c1c1c;
    --text: #e8e6e3;
    --text-muted: #9a9691;
    --border: #2a2826;
  }
}

/* Explicit light theme */
[data-theme="light"] {
  --bg: #faf8f5;
  --surface: #fff;
  --surface-hover: #f5f2ed;
  --text: #1a1a1a;
  --text-muted: #5c5c5c;
  --border: #e5e2dd;
}

/* Explicit dark theme */
[data-theme="dark"] {
  --bg: #0d0d0d;
  --surface: #161616;
  --surface-hover: #1c1c1c;
  --text: #e8e6e3;
  --text-muted: #9a9691;
  --border: #2a2826;
}

/* Base */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Transparent profile image as background */
.bg-profile {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: url("./background.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.12;
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1000;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* ----- Theme side pane ----- */
.theme-pane {
  position: fixed;
  top: 0;
  right: 0;
  width: 280px;
  height: 100vh;
  background: var(--surface);
  border-left: 1px solid var(--border);
  box-shadow: -8px 0 32px rgba(0, 0, 0, 0.12);
  z-index: 200;
  transform: translateX(100%);
  transition: transform 0.25s ease;
  overflow-y: auto;
}
.theme-pane.is-open { transform: translateX(0); }
.theme-pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space) 1.25rem;
  border-bottom: 1px solid var(--border);
}
.theme-pane-title {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  margin: 0;
  color: var(--text);
}
.theme-pane-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: var(--radius);
  transition: color 0.2s ease, background 0.2s ease;
}
.theme-pane-close:hover {
  color: var(--text);
  background: var(--surface-hover);
}
.theme-pane-body { padding: 1.25rem; }
.theme-option { margin-bottom: 1.5rem; }
.theme-option:last-child { margin-bottom: 0; }
.theme-option-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}
.theme-option-buttons {
  display: flex;
  gap: 0.5rem;
}
.theme-btn {
  flex: 1;
  padding: 0.5rem 0.75rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface-hover);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.theme-btn:hover { color: var(--text); }
.theme-btn.active,
.theme-btn[aria-pressed="true"] {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
}
.accent-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.accent-swatch {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--swatch);
  border: 2px solid var(--border);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}
.accent-swatch:hover { transform: scale(1.1); box-shadow: 0 4px 12px rgba(0,0,0,0.2); }
.accent-swatch.active { border-color: var(--text); box-shadow: 0 0 0 2px var(--bg); }
.accent-custom {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.accent-picker {
  width: 40px;
  height: 40px;
  padding: 2px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-hover);
  cursor: pointer;
}
.accent-custom-label { font-size: 0.875rem; color: var(--text-muted); }
.theme-pane-toggle {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 150;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.theme-pane-toggle:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

/* ----- Header ----- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space) 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-family: var(--font-head);
  font-weight: 400;
  font-size: 1.5rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.logo:hover { color: var(--accent); }
.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}
.nav-links a:hover { color: var(--accent); }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text);
}
.nav-toggle span { width: 22px; height: 2px; background: currentColor; border-radius: 1px; }

/* ----- Hero ----- */
.hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3.5rem 1.5rem 4rem;
}
.hero-profile {
  display: grid;
  gap: 2rem;
  align-items: start;
}
@media (min-width: 640px) {
  .hero-profile { grid-template-columns: auto 1fr; }
}
.hero-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--border);
  overflow: hidden;
  flex-shrink: 0;
  box-shadow: 0 0 0 1px var(--border), 0 8px 32px rgba(0, 0, 0, 0.12), 0 0 48px var(--accent-glow);
}
.hero-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.hero-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin: 0 0 0.25rem;
}
.hero-title {
  font-family: var(--font-head);
  font-weight: 400;
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
  color: var(--text);
}
.hero-tagline {
  font-style: italic;
  color: var(--text-muted);
  margin: 0 0 1rem;
  font-size: 1.05rem;
}
.hero-desc {
  color: var(--text-muted);
  margin: 0 0 1.75rem;
  max-width: 42ch;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  transition: transform 0.15s ease, box-shadow 0.2s ease, color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px var(--accent-glow);
}
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ----- Sections ----- */
.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 1.5rem;
  border-top: 1px solid var(--border);
}
.section-title {
  font-family: var(--font-head);
  font-weight: 400;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
  color: var(--text);
}
.section-desc {
  color: var(--text-muted);
  margin: 0 0 1.5rem;
  max-width: 40ch;
}

/* About */
.about-lead {
  font-size: 1.15rem;
  line-height: 1.75;
  color: var(--text);
  margin: 0 0 0.75rem;
}
.about-lang { margin: 0; color: var(--text-muted); }
.about-lang strong { color: var(--accent); }

/* Projects — cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px var(--accent-glow);
}
.card-icon { font-size: 1.75rem; margin-bottom: 0.75rem; }
.card h3 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1.15rem;
  margin: 0 0 0.5rem;
  color: var(--text);
}
.card p { margin: 0 0 0.75rem; color: var(--text-muted); font-size: 0.95rem; }
.card-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s ease;
}
.card-link:hover { opacity: 0.85; }
.card-link.placeholder { color: var(--text-muted); font-style: italic; }
.card[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.45s ease, transform 0.45s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.card[data-reveal].visible { opacity: 1; transform: translateY(0); }

/* Skills */
.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.skill-tag {
  display: inline-block;
  padding: 0.4rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}
.skill-tag:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
}
.skill-tag em { font-style: italic; font-weight: 400; color: var(--text-muted); }

/* Work */
.work-content p { margin: 0 0 0.5rem; color: var(--text-muted); }
.work-content strong { color: var(--text); }
.placeholder-resume { margin-top: 1rem; }
.placeholder-resume.placeholder { font-style: italic; color: var(--text-muted); }

/* Contact */
.contact-desc { color: var(--text-muted); margin: 0 0 1.25rem; }
.contact-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.contact-link {
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s ease;
}
.contact-link:hover { opacity: 0.85; }
.contact-link.placeholder { color: var(--text-muted); font-style: italic; }

/* Footer */
.footer {
  padding: 2rem 1.5rem;
  text-align: center;
  border-top: 1px solid var(--border);
}
.footer p { margin: 0; font-size: 0.9rem; color: var(--text-muted); }
.footer a { color: var(--accent); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

/* ----- Mobile ----- */
@media (max-width: 640px) {
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    margin-top: 0.5rem;
  }
  .nav-links.is-open { display: flex; }
  .nav { flex-wrap: wrap; }
  .nav-toggle { display: flex; }
  .theme-pane { width: 100%; max-width: 280px; }
  .theme-pane-toggle { bottom: 1rem; right: 1rem; }
}