/* ===== SNOWARE — Dual Theme ===== */

:root {
  --bg: #1a1710;
  --bg-soft: #242016;
  --bg-card: #2c2818;
  --accent: #c8a87a;
  --accent-warm: #e8c9a0;
  --accent-cool: #8a9a7e;
  --text: #e0d8c8;
  --text-muted: #9e9585;
  --text-dim: #6b6358;
  --border: rgba(200,168,122,0.12);
  --border-hover: rgba(200,168,122,0.28);
  --radius: 10px;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --mono: 'Cascadia Code', 'Fira Code', monospace;
  --transition: 0.25s ease;
  --nav-bg: rgba(26,23,16,0.92);
  --logo-border: rgba(200,168,122,0.3);
  --logo-bg: rgba(44,40,24,0.5);
  --btn-hover-bg: rgba(200,168,122,0.08);
  --service-hover-bg: rgba(200,168,122,0.06);
  --code-bg: rgba(255,255,255,0.05);
  --code-inline-bg: rgba(255,255,255,0.06);
  --warning-bg: rgba(180,60,50,0.06);
  --warning-border: rgba(180,60,50,0.25);
  --warning-h: #b84040;
  --noise-svg: 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='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  --btn-accent-bg: rgba(200,168,122,0.1);
  --btn-accent-hover-bg: rgba(200,168,122,0.18);
  --subject-inline-bg: rgba(255,255,255,0.06);
}

/* Macaron Cyan theme (dark) */
[data-theme="cyan"] {
  --bg: #101820;
  --bg-soft: #161e2c;
  --bg-card: #1c2636;
  --accent: #5cb8e4;
  --accent-warm: #81d4fa;
  --accent-cool: #7ec8e3;
  --text: #c8dce8;
  --text-muted: #8aa4b8;
  --text-dim: #5a7a90;
  --border: rgba(92,184,228,0.12);
  --border-hover: rgba(92,184,228,0.28);
  --nav-bg: rgba(16,24,32,0.92);
  --logo-border: rgba(92,184,228,0.35);
  --logo-bg: rgba(28,38,54,0.5);
  --btn-hover-bg: rgba(92,184,228,0.08);
  --service-hover-bg: rgba(92,184,228,0.06);
  --code-bg: rgba(255,255,255,0.04);
  --code-inline-bg: rgba(255,255,255,0.06);
  --warning-bg: rgba(180,60,50,0.06);
  --warning-border: rgba(180,60,50,0.25);
  --warning-h: #c04040;
  --noise-svg: 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='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  --btn-accent-bg: rgba(92,184,228,0.1);
  --btn-accent-hover-bg: rgba(92,184,228,0.18);
  --subject-inline-bg: rgba(255,255,255,0.06);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: transparent;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.7;
  transition: color var(--transition);
}

.container { max-width: 920px; margin: 0 auto; padding: 0 24px; }

/* ===== Theme Toggle ===== */
.theme-toggle {
  background: none; border: none; cursor: pointer;
  padding: 4px; color: var(--text-muted);
  transition: color var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.theme-toggle:hover { color: var(--accent); }
[data-theme="warm"] .theme-icon-warm,
[data-theme="cyan"] .theme-icon-cyan { display: block; }
[data-theme="warm"] .theme-icon-cyan,
[data-theme="cyan"] .theme-icon-warm { display: none; }

/* Logo color shift for cyan theme — sepia+hue-rotate for precise warm→cool conversion */
[data-theme="cyan"] .nav-logo,
[data-theme="cyan"] .home-logo,
[data-theme="cyan"] .xag-logo,
[data-theme="cyan"] .warning-logo,
[data-theme="cyan"] .error-logo {
  filter: sepia(0.6) hue-rotate(190deg) saturate(1.5) brightness(1.08);
}

/* ===== Navigation ===== */
.site-nav {
  position: sticky; top: 0; z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
  transition: background-color var(--transition), border-color var(--transition);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--text); font-weight: 700; font-size: 17px; text-decoration: none;
  transition: color var(--transition);
}
.nav-brand img { border-radius: 50%; }
.nav-links { display: flex; gap: 22px; align-items: center; }
.nav-links a {
  color: var(--text-muted); text-decoration: none; font-size: 13.5px;
  transition: color var(--transition); position: relative;
}
.nav-links a:hover { color: var(--accent-warm); }
.nav-links a::after {
  content: ''; position: absolute; bottom: -3px; left: 0;
  width: 0; height: 1.5px; background: var(--accent);
  transition: width var(--transition);
}
.nav-links a:hover::after { width: 100%; }

/* ===== Homepage ===== */
.home-hero {
  min-height: 100vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 60px 24px;
  gap: 32px;
}
.home-hero .logo-wrap { text-align: center; }
.home-hero .home-logo {
  width: 160px; height: 160px;
  border-radius: 50%;
  border: 2px solid var(--logo-border);
  background: var(--logo-bg);
  backdrop-filter: blur(8px);
  transition: border-color var(--transition), background-color var(--transition);
}
.home-title {
  font-size: 44px; font-weight: 700; letter-spacing: 6px;
  color: var(--accent-warm);
  margin: 0;
  transition: color var(--transition);
}
/* Poem section */
.home-poem {
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
  position: relative;
}
.poem-line {
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 2;
  opacity: 0;
  animation: poemFadeIn 1.2s ease forwards;
  transition: color var(--transition);
}
.poem-line.fade-1 { animation-delay: 0.3s; color: var(--accent-warm); font-size: 15px; }
.poem-line.fade-2 { animation-delay: 0.9s; }
.poem-line.fade-3 { animation-delay: 1.5s; color: var(--accent-warm); font-size: 15px; }
.poem-line.fade-4 { animation-delay: 2.1s; }
.poem-sig {
  color: var(--text-dim);
  font-size: 12px;
  margin-top: 14px;
  opacity: 0;
  animation: poemFadeIn 1s ease 2.7s forwards;
  font-family: var(--mono);
  letter-spacing: 1px;
}
@keyframes poemFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
.home-poem::before {
  content: '';
  display: block;
  width: 60px;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--accent), transparent);
  margin: 0 auto 20px auto;
  opacity: 0;
  animation: poemFadeIn 0.8s ease 0.1s forwards;
}
.home-poem::after {
  content: '';
  display: block;
  width: 60px;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--accent), transparent);
  margin: 20px auto 0 auto;
  opacity: 0;
  animation: poemFadeIn 0.8s ease 3.2s forwards;
}

/* Homepage nav buttons */
.home-nav { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.home-btn {
  padding: 11px 26px; border-radius: 8px;
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text); text-decoration: none; font-size: 14px; font-weight: 500;
  transition: all var(--transition);
}
.home-btn:hover {
  border-color: var(--border-hover);
  background: var(--btn-hover-bg);
  transform: translateY(-1px);
}

/* Services section on homepage */
.home-services {
  margin-top: 48px;
  text-align: center;
}
.home-services h2 {
  font-size: 15px; color: var(--text-dim); font-weight: 500;
  letter-spacing: 2px; text-transform: uppercase; margin-bottom: 20px;
  transition: color var(--transition);
}
.services-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  max-width: 720px; margin: 0 auto;
}
.service-card {
  padding: 20px 16px; border-radius: var(--radius);
  background: var(--bg-card); border: 1px solid var(--border);
  text-decoration: none; color: var(--text);
  transition: all var(--transition);
  text-align: center;
}
.service-card:hover {
  border-color: var(--border-hover);
  background: var(--service-hover-bg);
}
.service-icon {
  display: flex; justify-content: center; margin-bottom: 10px;
}
.service-icon svg { width: 28px; height: 28px; stroke: var(--accent); fill: none; stroke-width: 1.8; }
.service-card h3 { font-size: 14px; color: var(--accent-warm); margin-bottom: 4px; }
.service-card p { font-size: 12.5px; color: var(--text-muted); }
.service-card.no-link { cursor: default; }
.service-card.no-link:hover { background: var(--bg-card); border-color: var(--border); transform: none; }

/* ===== Page Hero ===== */
.page-hero {
  text-align: center; padding: 72px 24px 36px;
}
.page-hero h1 {
  font-size: 36px; font-weight: 700;
  color: var(--accent-warm); margin-bottom: 6px;
  transition: color var(--transition);
}
.page-hero .subtitle { color: var(--text-muted); font-size: 16px; }

/* ===== Page Content ===== */
.page-content { padding: 16px 24px 60px; }

/* ===== Buttons ===== */
.btn {
  display: inline-block; padding: 9px 22px; border-radius: 8px;
  font-size: 14px; font-weight: 500; text-decoration: none;
  transition: all var(--transition); cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-warm); }
.btn-accent {
  background: var(--btn-accent-bg); color: var(--accent);
  border-color: var(--border-hover);
}
.btn-accent:hover { background: var(--btn-accent-hover-bg); }
.btn-outline { background: transparent; color: var(--text-muted); border-color: var(--border); }
.btn-outline:hover { border-color: var(--text-muted); color: var(--text); }
.btn-lg { padding: 13px 30px; font-size: 16px; }

/* ===== Cards ===== */
.card-base {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(6px);
  transition: all var(--transition);
}
.card-base:hover { border-color: var(--border-hover); }

.feature-card {
  padding: 22px; text-align: center;
}
.feature-card h3 { color: var(--accent-warm); font-size: 15px; margin-bottom: 6px; }
.feature-card p { color: var(--text-muted); font-size: 13px; }
.feature-icon { font-size: 28px; margin-bottom: 10px; color: var(--accent); }

/* ===== Resources Section ===== */
.res-intro { text-align: center; margin-bottom: 28px; }
.res-intro-text { color: var(--text); font-size: 15px; }
.res-actions {
  display: flex; gap: 14px; justify-content: center;
  margin-bottom: 36px; flex-wrap: wrap;
}
.res-features {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 28px;
}

/* ===== File List ===== */
.filelist-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.subject-card {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 24px 16px;
  background: var(--bg-card);
  border: 1px solid color-mix(in srgb, var(--color) 20%, transparent);
  border-radius: var(--radius);
  text-decoration: none; color: var(--text);
  transition: all var(--transition);
}
.subject-card:hover {
  border-color: var(--color);
  background: color-mix(in srgb, var(--color) 6%, var(--bg-card));
  transform: translateY(-2px);
}
.subject-icon svg { width: 36px; height: 36px; stroke: var(--color); fill: none; stroke-width: 1.5; }
.subject-card h3 { font-size: 17px; }
.subject-pw { font-size: 12.5px; color: var(--text-muted); }
.subject-pw code {
  background: var(--subject-inline-bg); padding: 2px 7px; border-radius: 4px;
  color: var(--color); font-family: var(--mono);
}

/* ===== Software Section ===== */
.about-intro {
  text-align: center; margin-bottom: 36px; padding: 22px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
}
.about-intro p { color: var(--text-muted); margin-bottom: 14px; }
.project-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.project-card {
  display: flex; flex-direction: column; gap: 10px; padding: 24px;
  background: var(--bg-card);
  border: 1px solid color-mix(in srgb, var(--accent) 15%, transparent);
  border-radius: var(--radius);
  text-decoration: none; color: var(--text);
  transition: all var(--transition);
}
.project-card:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 4%, var(--bg-card));
  transform: translateY(-2px);
}
.card-header { display: flex; justify-content: space-between; align-items: flex-start; }
.card-header h3 { font-size: 18px; color: var(--accent-warm); }
.card-tags { display: flex; gap: 5px; flex-wrap: wrap; }
.tag {
  font-size: 11px; padding: 2px 9px; border-radius: 50px;
  background: color-mix(in srgb, var(--accent) 12%, var(--bg-card));
  color: var(--accent); border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
}
.card-desc { color: var(--text-muted); font-size: 13.5px; }
.card-links { margin-top: auto; }
.card-link { font-size: 13.5px; color: var(--accent); }

/* ===== Software Detail ===== */
.sw-links { display: flex; gap: 10px; justify-content: center; margin-bottom: 36px; flex-wrap: wrap; }
.sw-features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 36px; }
.sw-section {
  margin-bottom: 28px; padding: 22px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
}
.sw-section h2 { color: var(--accent-warm); margin-bottom: 10px; font-size: 20px; }
.sw-code {
  background: var(--code-bg); padding: 10px 16px; border-radius: 6px;
  font-family: var(--mono); font-size: 13px; overflow-x: auto; color: var(--text);
}
.usage-list { display: flex; flex-direction: column; gap: 10px; }
.usage-item { display: flex; gap: 10px; align-items: center; }
.usage-item code {
  background: var(--code-inline-bg); padding: 5px 10px; border-radius: 5px;
  font-family: var(--mono); font-size: 12.5px; white-space: nowrap;
}
.usage-item span { color: var(--text-muted); font-size: 13px; }

/* ===== Drag Ball ===== */
.drag-ball-area {
  text-align: center; padding: 22px; margin: 36px 0;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
}
.drag-hint { color: var(--text-muted); font-size: 13px; margin-top: 6px; }

/* ===== XAGuarder ===== */
.xag-intro {
  text-align: center; padding: 36px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  max-width: 560px; margin: 0 auto;
}
.xag-logo { border-radius: 50%; margin-bottom: 14px; }
.xag-intro h2 { margin-bottom: 14px; color: var(--accent-warm); }
.xag-intro p { color: var(--text-muted); margin-bottom: 18px; }

/* ===== Warning Page ===== */
.warning-page {
  min-height: 80vh; display: flex; align-items: center; justify-content: center;
}
.warning-content {
  text-align: center; padding: 50px;
  background: var(--warning-bg); border: 2px solid var(--warning-border);
  border-radius: var(--radius); max-width: 480px;
  transition: background-color var(--transition), border-color var(--transition);
}
.warning-logo { border-radius: 50%; margin-bottom: 18px; }
.warning-content h1 { color: var(--warning-h); font-size: 26px; margin-bottom: 14px; }
.warning-text { font-size: 16px; color: var(--text); margin-bottom: 6px; }
.warning-sub { color: var(--text-muted); font-size: 13px; margin-bottom: 22px; }

/* ===== Error Page ===== */
.error-page { min-height: 80vh; display: flex; align-items: center; justify-content: center; }
.error-content { text-align: center; }
.error-logo { border-radius: 50%; margin-bottom: 18px; }
.error-content h1 { font-size: 64px; color: var(--accent); margin-bottom: 10px; }
.error-content p { color: var(--text-muted); }
.error-hint { font-size: 13px; margin-bottom: 22px; }

/* ===== Footer ===== */
.site-footer {
  text-align: center; padding: 22px;
  border-top: 1px solid var(--border);
  color: var(--text-dim); font-size: 12.5px; margin-top: auto;
  transition: border-color var(--transition), color var(--transition);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-inner { flex-direction: column; gap: 10px; }
  .nav-links { gap: 14px; }
  .home-title { font-size: 30px; letter-spacing: 4px; }
  .home-hero .home-logo { width: 120px; height: 120px; }
  .services-grid { grid-template-columns: 1fr 1fr; max-width: 360px; }
  .page-hero h1 { font-size: 26px; }
  .project-grid { grid-template-columns: 1fr; }
  .filelist-grid { grid-template-columns: repeat(2, 1fr); }
  .res-features, .sw-features { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .services-grid { grid-template-columns: 1fr; max-width: 280px; }
  .filelist-grid { grid-template-columns: 1fr; }
  .res-features, .sw-features { grid-template-columns: 1fr; }
  .sw-links { flex-direction: column; align-items: center; }
}