/* Art direction: DatePrism (masonic date calculator) -> mystic-precise, cosmic light through a prism
   Palette: cool midnight neutrals, teal primary accent + gold secondary accent (light/celebration)
   Typography: Fraunces (display, elegant serif w/ character) + General Sans (body, clean geometric sans)
   Density: balanced, generous on informational hero, tighter on documentation */

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

html {
  -webkit-text-size-adjust: none; text-size-adjust: none;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility; scroll-behavior: smooth;
  scroll-padding-top: var(--space-16);
}

:root, [data-theme="light"] {
  --color-bg: #f5f6f6;
  --color-surface: #ffffff;
  --color-surface-2: #fbfcfc;
  --color-surface-offset: #eef0f0;
  --color-surface-offset-2: #e6e9e9;
  --color-surface-dynamic: #dde1e1;
  --color-divider: #dee2e2;
  --color-border: #d3d8d8;
  --color-text: #12181c;
  --color-text-muted: #5b6668;
  --color-text-faint: #687173;
  --color-text-inverse: #f7f9f9;
  --color-primary: #0d7a76;
  --color-primary-hover: #0a5f5c;
  --color-primary-active: #084a48;
  --color-primary-highlight: #cfe4e2;
  --color-gold: #b9852f;
  --color-gold-hover: #9c6d22;
  --color-gold-active: #7d5619;
  --color-gold-highlight: #ecdcbb;
  --color-error: #a12c4b;
  --radius-sm: 0.375rem; --radius-md: 0.5rem; --radius-lg: 0.75rem; --radius-xl: 1.25rem; --radius-full: 9999px;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm: 0 1px 2px oklch(0.2 0.02 220 / 0.07);
  --shadow-md: 0 4px 14px oklch(0.2 0.02 220 / 0.09);
  --shadow-lg: 0 14px 36px oklch(0.2 0.02 220 / 0.14);
  --content-narrow: 640px; --content-default: 980px; --content-wide: 1200px; --content-full: 100%;
  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'General Sans', 'Inter', sans-serif;
}

[data-theme="dark"] {
  --color-bg: #0b0f13;
  --color-surface: #10161b;
  --color-surface-2: #131a20;
  --color-surface-offset: #161d23;
  --color-surface-offset-2: #1b2329;
  --color-surface-dynamic: #232c33;
  --color-divider: #1f2830;
  --color-border: #2b3640;
  --color-text: #e6ecec;
  --color-text-muted: #8b9799;
  --color-text-faint: #7c8789;
  --color-text-inverse: #10161b;
  --color-primary: #4fbdb5;
  --color-primary-hover: #6fcec7;
  --color-primary-active: #8dd9d3;
  --color-primary-highlight: #1c3634;
  --color-gold: #e0ac54;
  --color-gold-hover: #eabf76;
  --color-gold-active: #f0cd93;
  --color-gold-highlight: #3a2f1c;
  --color-error: #dd6f8b;
  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 4px 14px oklch(0 0 0 / 0.4);
  --shadow-lg: 0 14px 36px oklch(0 0 0 / 0.55);
}

:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.25rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 4.5rem);
  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem; --space-5: 1.25rem;
  --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem; --space-12: 3rem; --space-16: 4rem;
  --space-20: 5rem; --space-24: 6rem; --space-32: 8rem;
}

body { min-height: 100dvh; line-height: 1.6; font-family: var(--font-body), sans-serif; font-size: var(--text-base); color: var(--color-text); background-color: var(--color-bg); }
img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4 { font-family: var(--font-display), serif; text-wrap: balance; line-height: 1.15; }
p, li, figcaption { text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
::selection { background: color-mix(in oklch, var(--color-primary) 30%, transparent); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }
button { cursor: pointer; background: none; border: none; }

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

.container { max-width: var(--content-default); margin-inline: auto; padding-inline: var(--space-5); }
.container-wide { max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-5); }
.container-narrow { max-width: var(--content-narrow); margin-inline: auto; padding-inline: var(--space-5); }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: color-mix(in oklch, var(--color-bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--color-divider); }
.header-inner { max-width: 1340px; margin-inline: auto; padding: var(--space-3) var(--space-5); display: flex; align-items: center; justify-content: space-between; gap: var(--space-6); }
.brand { display: flex; align-items: center; gap: var(--space-3); font-family: var(--font-display); font-weight: 600; font-size: var(--text-lg); flex-shrink: 0; }
.brand img { width: 34px; height: 34px; border-radius: var(--radius-md); flex-shrink: 0; }
.main-nav { display: flex; align-items: center; gap: var(--space-5); min-width: 0; flex: 1 1 auto; }
.main-nav ul { display: flex; flex-wrap: wrap; justify-content: flex-end; row-gap: var(--space-2); column-gap: var(--space-4); list-style: none; }
.main-nav ul li { list-style: none; }
.main-nav a { color: var(--color-text-muted); font-size: var(--text-sm); font-weight: 500; white-space: nowrap; }
.main-nav a:hover, .main-nav a.active { color: var(--color-primary); }
.header-controls { display: flex; align-items: center; gap: var(--space-3); flex-shrink: 0; }
.theme-toggle { width: 38px; height: 38px; border-radius: var(--radius-full); display: flex; align-items: center; justify-content: center; border: 1px solid var(--color-border); color: var(--color-text-muted); flex-shrink: 0; }
.theme-toggle:hover { color: var(--color-primary); border-color: var(--color-primary); }
.lang-switch { height: 38px; padding: 0 var(--space-2); border-radius: var(--radius-full); border: 1px solid var(--color-border); background: var(--color-surface); color: var(--color-text-muted); font-size: var(--text-sm); flex-shrink: 0; }
.lang-switch:hover { color: var(--color-primary); border-color: var(--color-primary); }
.nav-toggle { display: none; }

@media (max-width: 860px) {
  .header-inner { gap: var(--space-2); }
  .main-nav { flex: 0 0 auto; }
  .main-nav ul { display: none; }
  .nav-toggle { display: flex; width: 38px; height: 38px; align-items: center; justify-content: center; border: 1px solid var(--color-border); border-radius: var(--radius-md); flex-shrink: 0; }
  .main-nav.open ul { display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: var(--color-surface); padding: var(--space-4) var(--space-5); border-bottom: 1px solid var(--color-divider); gap: var(--space-3); }
}

@media (max-width: 480px) {
  .header-inner { padding-inline: var(--space-3); }
  .header-controls { gap: var(--space-2); }
  .lang-switch { padding: 0 var(--space-1); font-size: var(--text-xs); }
  .theme-toggle, .nav-toggle { width: 34px; height: 34px; }
}

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2); padding: var(--space-3) var(--space-6); border-radius: var(--radius-md); font-size: var(--text-sm); font-weight: 600; transition: all var(--transition-interactive); border: 1px solid transparent; }
.btn-primary { background: var(--color-primary); color: var(--color-text-inverse); }
.btn-primary:hover { background: var(--color-primary-hover); box-shadow: var(--shadow-md); }
.btn-secondary { background: var(--color-surface); border-color: var(--color-border); color: var(--color-text); }
.btn-secondary:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn-gold { background: var(--color-gold); color: var(--color-text-inverse); }
.btn-gold:hover { background: var(--color-gold-hover); box-shadow: var(--shadow-md); }
.btn-ghost { color: var(--color-text-muted); }
.btn-ghost:hover { color: var(--color-primary); }
.btn-block { width: 100%; }
.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--text-base); }

/* Hero */
.hero { position: relative; padding-block: var(--space-24) var(--space-16); overflow: clip; background: linear-gradient(180deg, color-mix(in oklch, var(--color-primary) 4%, var(--color-bg)), var(--color-bg)); }
[data-theme="dark"] .hero { background: linear-gradient(180deg, #0d1418, var(--color-bg)); }
.hero-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: var(--space-12); align-items: start; }
.hero-eyebrow { display: inline-flex; align-items: center; gap: var(--space-2); color: var(--color-gold); font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: var(--space-5); }
.hero h1 { font-size: var(--text-3xl); margin-bottom: var(--space-6); }
.hero h1 em { font-style: normal; color: var(--color-primary); }
.hero p.lede { font-size: var(--text-lg); color: var(--color-text-muted); max-width: 46ch; margin-bottom: var(--space-8); }
.hero-actions { display: flex; gap: var(--space-4); flex-wrap: wrap; }
.hero-text-col { display: flex; flex-direction: column; }
.hero-visual { align-self: stretch; }
.hero-visual-sticky { position: sticky; top: calc(var(--space-16) + 60px); border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow-lg); aspect-ratio: 4/3; margin-top: 2.6rem; width: 112%; max-width: 112%; }
.hero-visual-sticky img { width: 100%; height: 100%; object-fit: cover; }

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; align-self: auto; }
  .hero-visual-sticky { position: static; width: 100%; max-width: 100%; margin-top: 0; max-height: 55vh; }
}

/* Section */
.section-head { max-width: 60ch; margin-bottom: var(--space-10); }
.section-eyebrow { display: block; color: var(--color-primary); font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: var(--space-3); }
.section-head h2 { font-size: var(--text-2xl); margin-bottom: var(--space-4); }
.section-head p { color: var(--color-text-muted); font-size: var(--text-base); }
section { padding-block: clamp(var(--space-12), 6vw, var(--space-20)); }

/* Feature cards */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.feature-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-6); box-shadow: var(--shadow-sm); }
.feature-card h3 { font-size: var(--text-lg); margin-bottom: var(--space-3); font-family: var(--font-body); font-weight: 700; }
.feature-card p { color: var(--color-text-muted); font-size: var(--text-sm); }
.feature-card.wide { grid-column: span 2; }

@media (max-width: 860px) {
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card.wide { grid-column: span 1; }
}

/* Rite grid */
.rite-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-6); box-shadow: var(--shadow-sm); }
.card h3 { font-size: var(--text-base); font-weight: 700; margin-bottom: var(--space-2); font-family: var(--font-body); }
.card p { color: var(--color-text-muted); font-size: var(--text-sm); }
.rite-icon { color: var(--color-gold); margin-bottom: var(--space-3); }

@media (max-width: 700px) { .rite-grid { grid-template-columns: 1fr; } }

/* Screenshot gallery */
.shots-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
.shot-frame { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--color-border); box-shadow: var(--shadow-md); background: var(--color-surface-offset); }
.shot-frame img { width: 100%; height: auto; }
.shot-caption { padding: var(--space-3) var(--space-4); font-size: var(--text-sm); color: var(--color-text-muted); }

@media (max-width: 700px) { .shots-grid { grid-template-columns: 1fr; } }

/* Lang badges */
.lang-badges { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.lang-badge { padding: var(--space-2) var(--space-4); border-radius: var(--radius-full); border: 1px solid var(--color-border); font-size: var(--text-sm); background: var(--color-surface); }

/* Divider */
.motif-divider { text-align: center; color: var(--color-gold); font-size: var(--text-lg); opacity: 0.5; margin-block: var(--space-4); }

/* CTA band */
.cta-band { background: var(--color-surface-offset); border-radius: var(--radius-xl); padding: var(--space-12); text-align: left; display: flex; align-items: center; justify-content: space-between; gap: var(--space-8); flex-wrap: wrap; }
.cta-band h2 { font-size: var(--text-xl); margin-bottom: var(--space-2); }
.cta-band p { color: var(--color-text-muted); }

/* Footer */
.site-footer { border-top: 1px solid var(--color-divider); padding-block: var(--space-12) var(--space-8); background: var(--color-surface-offset); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-8); margin-bottom: var(--space-10); }
.footer-col h4 { font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-faint); margin-bottom: var(--space-4); font-family: var(--font-body); }
.footer-col a { display: block; color: var(--color-text-muted); font-size: var(--text-sm); margin-bottom: var(--space-2); }
.footer-col a:hover { color: var(--color-primary); }
.footer-brand { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-4); font-family: var(--font-display); font-weight: 600; font-size: var(--text-base); }
.footer-brand img { width: 28px; height: 28px; border-radius: var(--radius-sm); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: var(--space-6); border-top: 1px solid var(--color-divider); font-size: var(--text-xs); color: var(--color-text-faint); flex-wrap: wrap; gap: var(--space-3); }

@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }

/* Downloads page */
.dl-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-8); margin-bottom: var(--space-12); }
.dl-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-8); box-shadow: var(--shadow-sm); }
.dl-card .platform-icon { width: 48px; height: 48px; color: var(--color-primary); margin-bottom: var(--space-5); }
.dl-card h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); font-family: var(--font-body); font-weight: 700; }
.dl-card .version-tag { display: inline-block; font-size: var(--text-xs); color: var(--color-text-faint); margin-bottom: var(--space-5); }
.dl-card ul { list-style: none; margin-bottom: var(--space-6); }
.dl-card li { display: flex; gap: var(--space-2); font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-2); align-items: flex-start; }
.dl-card li svg { flex-shrink: 0; margin-top: 3px; color: var(--color-primary); }
.callout { background: var(--color-primary-highlight); border-radius: var(--radius-lg); padding: var(--space-5) var(--space-6); font-size: var(--text-sm); color: var(--color-text); margin-bottom: var(--space-10); }

@media (max-width: 760px) { .dl-grid { grid-template-columns: 1fr; } }

/* Documentation page */
.doc-layout { display: grid; grid-template-columns: 220px 1fr; gap: var(--space-10); }
.doc-nav { position: sticky; top: calc(var(--space-16) + 60px); align-self: start; display: flex; flex-direction: column; gap: var(--space-2); }
.doc-nav a { font-size: var(--text-sm); color: var(--color-text-muted); padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); }
.doc-nav a:hover { background: var(--color-surface-offset); color: var(--color-primary); }
.doc-content h2 { font-size: var(--text-xl); margin-block: var(--space-10) var(--space-4); }
.doc-content h2:first-child { margin-top: 0; }
.doc-content p { color: var(--color-text-muted); margin-bottom: var(--space-4); max-width: 72ch; }
.doc-content ul, .doc-content ol { margin-bottom: var(--space-4); padding-left: var(--space-6); color: var(--color-text-muted); }
.doc-content li { margin-bottom: var(--space-2); }
.doc-content strong { color: var(--color-text); }

@media (max-width: 860px) { .doc-layout { grid-template-columns: 1fr; } .doc-nav { position: static; flex-direction: row; overflow-x: auto; padding-bottom: var(--space-3); } }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--color-divider); padding-block: var(--space-5); }
.faq-item summary { cursor: pointer; font-weight: 600; font-size: var(--text-base); display: flex; justify-content: space-between; align-items: center; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item .chev { transition: transform var(--transition-interactive); color: var(--color-text-faint); flex-shrink: 0; margin-left: var(--space-4); }
.faq-item[open] .chev { transform: rotate(180deg); }
.faq-body { padding-top: var(--space-3); color: var(--color-text-muted); font-size: var(--text-sm); max-width: 70ch; }

/* Contact form */
.form-group { margin-bottom: var(--space-5); }
.form-group label { display: block; font-size: var(--text-sm); font-weight: 600; margin-bottom: var(--space-2); }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: var(--space-3) var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); color: var(--color-text); font-size: var(--text-base); }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color: var(--color-primary); }

/* Changelog */
.changelog-entry { border-left: none; border-bottom: 1px solid var(--color-divider); padding-block: var(--space-8); }
.changelog-entry:first-of-type { padding-top: 0; }
.v-tag { display: inline-block; background: var(--color-primary-highlight); color: var(--color-primary); font-weight: 700; font-size: var(--text-xs); padding: var(--space-1) var(--space-3); border-radius: var(--radius-full); margin-bottom: var(--space-2); }
.v-date { display: block; color: var(--color-text-faint); font-size: var(--text-xs); margin-bottom: var(--space-4); }
.changelog-entry ul { padding-left: var(--space-5); color: var(--color-text-muted); font-size: var(--text-sm); }
.changelog-entry li { margin-bottom: var(--space-2); }

/* Donate */
.donate-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.donate-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-8); }
.donate-card .currency { font-family: var(--font-display); font-size: var(--text-2xl); color: var(--color-gold); display: block; margin-bottom: var(--space-3); }

@media (max-width: 860px) { .donate-grid { grid-template-columns: 1fr; } }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }