/*
 * marlek.css — Marlek web stylesheet (marlek.khassinx.com)
 *
 * Combines Layer 2 (Marlek "secret code" green brand tokens) + Layer 3 (KhassinX
 * shared primitives) into one self-contained file so the site deploys as plain
 * static HTML on GitHub Pages without a Jekyll include pipeline.
 *
 * Brand origin: Marlek — a 1:1 emoji/symbol substitution cipher invented by its
 * creator (public handle Slime@YT). "Secret code" neon green.
 *   - Icon: "Cipher M" v3 — flat 2D M whose central vertex is a key (the cipher)
 *     plus 4 terminal nodes; neon-green symbol on a deep-forest gradient field.
 *   - Icon bg gradient: #04241A -> #0A3D2A -> #0E5538 (deep forest)
 *   - Cipher M / node mark: #5BFB6A (neon — decorative / dark-mode signature only)
 *   - App tint (light/dark): #0E6B40 light (WCAG AA 6.57:1 on white) / #5BFB6A dark
 *
 * Mirrors BRAND_SYSTEM.md §1 3-layer doctrine + primitives.css verbatim structure.
 * IP belongs to the creator. Published by KHASSINX LLC.
 */

/* ═══════════════ Layer 2 — Marlek brand tokens ═══════════════ */

:root {
  /* ── Light theme (default — Apple canon surfaces, Marlek green accent) ── */

  /* Backgrounds (Apple canon) */
  --marlek-bg: #FFFFFF;
  --marlek-bg-section: #F2F7F3;        /* faint green-tinted section */
  --marlek-bg-card: #FBFEFC;
  --marlek-bg-elevated: #FFFFFF;

  /* Text (Apple canon) */
  --marlek-text-primary: #102018;       /* near-black, faint green cast */
  --marlek-text-secondary: #4B5A52;
  --marlek-text-tertiary: #63726B;      /* WCAG AA 5.06:1 on white (era #7A8A82 = 3.64:1, fallaba AA en captions/fechas) */
  --marlek-text-disabled: #C2CCC7;

  /* Accents — Marlek "secret code" green (matches app BrandColor + Cipher M v3 icon) */
  --marlek-accent: #0E6B40;             /* deep code green — CTA/link/text. WCAG AA 6.57:1 on white */
  --marlek-accent-strong: #0A5230;      /* hover/active darker — 9.28:1 on white */
  --marlek-accent-soft: #E4F4EA;        /* subtle green wash */
  --marlek-neon: #1FA86B;               /* mid teal-green — decorative borders/badges only (3.06:1, not for text) */

  /* Borders (Apple hairline) */
  --marlek-border: #D5E0DA;
  --marlek-border-strong: #7A8A82;

  /* Status (Apple system colors) */
  --marlek-success: #34C759;
  --marlek-warning: #FF9500;
  --marlek-danger: #FF3B30;

  /* Icon field gradient (Cipher M v3 deep-forest field — reused in hero badge) */
  --marlek-field-1: #04241A;
  --marlek-field-2: #0A3D2A;
  --marlek-field-3: #0E5538;
  --marlek-glow: #5BFB6A;                /* Cipher M neon-green symbol — decorative / dark-mode signature */

  /* ── Re-bind to Layer 1 token names so primitives below work ── */
  --khassinx-bg: var(--marlek-bg);
  --khassinx-bg-section: var(--marlek-bg-section);
  --khassinx-bg-card: var(--marlek-bg-card);
  --khassinx-bg-elevated: var(--marlek-bg-elevated);
  --khassinx-text-primary: var(--marlek-text-primary);
  --khassinx-text-secondary: var(--marlek-text-secondary);
  --khassinx-text-tertiary: var(--marlek-text-tertiary);
  --khassinx-text-disabled: var(--marlek-text-disabled);
  --khassinx-accent: var(--marlek-accent);
  --khassinx-accent-strong: var(--marlek-accent-strong);
  --khassinx-accent-soft: var(--marlek-accent-soft);
  --khassinx-border: var(--marlek-border);
  --khassinx-border-strong: var(--marlek-border-strong);
  --khassinx-success: var(--marlek-success);
  --khassinx-warning: var(--marlek-warning);
  --khassinx-danger: var(--marlek-danger);

  /* ── Spacing scale (Apple-grade) ── */
  --space-xs: 4px;
  --space-s: 8px;
  --space-m: 12px;
  --space-md: 16px;
  --space-lg: 20px;
  --space-xl: 24px;
  --space-2xl: 32px;
  --space-3xl: 48px;
  --space-4xl: 64px;
  --space-5xl: 96px;
  --space-6xl: 128px;
  --space-7xl: 160px;
  --space-8xl: 200px;

  /* Container max-widths (Apple-canonical 980px) */
  --container-narrow: 640px;
  --container-default: 980px;
  --container-wide: 1280px;

  /* Border radius (Apple soft corners) */
  --radius-s: 6px;
  --radius-m: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 22px;
  --radius-2xl: 28px;
  --radius-pill: 999px;

  /* Typography (Apple canon) */
  --font-stack: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Menlo, Consolas, monospace;

  --fs-display-xl: 80px;
  --fs-display-l: 56px;
  --fs-display-m: 40px;
  --fs-display-s: 32px;
  --fs-h1: 48px;
  --fs-h2: 32px;
  --fs-h3: 24px;
  --fs-h4: 19px;
  --fs-body-l: 19px;
  --fs-body: 17px;
  --fs-body-s: 15px;
  --fs-caption: 13px;
  --fs-micro: 11px;

  /* Shadows (Apple-canonical subtle) */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 32px rgba(4, 36, 26, 0.10);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

/* ── Dark theme (auto via prefers-color-scheme — neon code-green identity) ── */

@media (prefers-color-scheme: dark) {
  :root {
    --marlek-bg: #07120D;               /* deep forest, OLED-friendly */
    --marlek-bg-section: #0C1C14;
    --marlek-bg-card: #102219;
    --marlek-bg-elevated: #14291E;

    --marlek-text-primary: #ECF7F0;
    --marlek-text-secondary: #A6BBB0;
    --marlek-text-tertiary: #7E948A;
    --marlek-text-disabled: #455048;

    --marlek-accent: #5BFB6A;           /* neon code green — the signature */
    --marlek-accent-strong: #84FF90;
    --marlek-accent-soft: #112B1C;
    --marlek-neon: #5BFB6A;

    --marlek-border: #1E3A2B;
    --marlek-border-strong: #2C5240;

    --marlek-success: #30D158;
    --marlek-warning: #FF9F0A;
    --marlek-danger: #FF453A;

    /* Re-bind to Layer 1 names */
    --khassinx-bg: var(--marlek-bg);
    --khassinx-bg-section: var(--marlek-bg-section);
    --khassinx-bg-card: var(--marlek-bg-card);
    --khassinx-bg-elevated: var(--marlek-bg-elevated);
    --khassinx-text-primary: var(--marlek-text-primary);
    --khassinx-text-secondary: var(--marlek-text-secondary);
    --khassinx-text-tertiary: var(--marlek-text-tertiary);
    --khassinx-text-disabled: var(--marlek-text-disabled);
    --khassinx-accent: var(--marlek-accent);
    --khassinx-accent-strong: var(--marlek-accent-strong);
    --khassinx-accent-soft: var(--marlek-accent-soft);
    --khassinx-border: var(--marlek-border);
    --khassinx-border-strong: var(--marlek-border-strong);
    --khassinx-success: var(--marlek-success);
    --khassinx-warning: var(--marlek-warning);
    --khassinx-danger: var(--marlek-danger);

    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  }
}

/* ═══════════════ Layer 3 — KhassinX shared primitives ═══════════════ */

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; font-size: 100%; }

body {
  font-family: var(--font-stack);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: 1.47;
  color: var(--khassinx-text-primary);
  background: var(--khassinx-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  letter-spacing: -0.003em;
}

main { flex: 1; }

h1, h2, h3, h4, h5, h6 {
  color: var(--khassinx-text-primary);
  font-weight: 600;
  letter-spacing: -0.012em;
  line-height: 1.15;
}
h1 { font-size: clamp(2rem, 5vw, var(--fs-h1)); letter-spacing: -0.012em; }
h2 { font-size: clamp(1.75rem, 4vw, var(--fs-h2)); letter-spacing: -0.008em; line-height: 1.2; }
h3 { font-size: var(--fs-h3); font-weight: 600; letter-spacing: -0.003em; line-height: 1.27; }

p { margin-bottom: var(--space-md); color: var(--khassinx-text-primary); }
p:last-child { margin-bottom: 0; }

a { color: var(--khassinx-accent); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--khassinx-accent-strong); text-decoration: underline; text-underline-offset: 2px; }

strong { font-weight: 600; }
em { font-style: italic; }

code, pre { font-family: var(--font-mono); font-size: var(--fs-body-s); }
code {
  background: var(--khassinx-bg-section);
  padding: 2px 6px;
  border-radius: var(--radius-s);
  font-size: 0.92em;
}

:focus-visible {
  outline: 2px solid var(--khassinx-accent);
  outline-offset: 3px;
  border-radius: var(--radius-s);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--khassinx-text-primary);
  color: var(--khassinx-bg);
  padding: var(--space-s) var(--space-md);
  z-index: 999;
  font-size: var(--fs-body-s);
  font-weight: 500;
  border-radius: 0 0 var(--radius-m) 0;
}
.skip-link:focus { left: 0; top: 0; }

.container {
  width: 100%;
  max-width: var(--container-default);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}
.container-narrow { max-width: var(--container-narrow); }

@media (min-width: 768px) {
  .container { padding: 0 var(--space-2xl); }
}

/* ── Header / Nav ── */
.site-header {
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--khassinx-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: saturate(180%) blur(20px);
  background: rgba(255, 255, 255, 0.72);
}
@media (prefers-color-scheme: dark) {
  .site-header { background: rgba(7, 18, 13, 0.72); }
}
.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-s);
  font-weight: 600;
  font-size: var(--fs-body);
  letter-spacing: -0.012em;
  color: var(--khassinx-text-primary);
  text-decoration: none;
}
.logo:hover { text-decoration: none; color: var(--khassinx-text-primary); }
.logo img { height: 28px; width: 28px; border-radius: 7px; }
.site-nav { display: flex; gap: var(--space-xl); align-items: center; }
.site-nav a {
  color: var(--khassinx-text-primary);
  font-size: var(--fs-body-s);
  font-weight: 400;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  letter-spacing: -0.003em;
}
.site-nav a:hover { color: var(--khassinx-accent); text-decoration: none; }
@media (max-width: 520px) {
  .site-header .container { flex-direction: column; align-items: flex-start; }
  .site-nav { width: 100%; flex-wrap: wrap; gap: var(--space-md); }
}

/* ── Hero ── */
.hero { padding: var(--space-5xl) 0 var(--space-4xl); text-align: center; }
@media (min-width: 768px) { .hero { padding: var(--space-6xl) 0 var(--space-5xl); } }
.hero h1 {
  font-size: clamp(2.5rem, 7vw, var(--fs-display-xl));
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.05;
  margin-bottom: var(--space-lg);
  color: var(--khassinx-text-primary);
}
.hero .lead {
  font-size: clamp(1.125rem, 2.5vw, var(--fs-body-l));
  font-weight: 400;
  color: var(--khassinx-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
  line-height: 1.38;
  letter-spacing: -0.003em;
}
.hero .cta { display: flex; justify-content: center; gap: var(--space-md); flex-wrap: wrap; margin-top: var(--space-xl); }

/* Hero brand badge (icon artwork on the deep-green field) */
.brand-badge {
  width: 132px;
  height: 132px;
  margin: 0 auto var(--space-xl);
  border-radius: 29.5%;
  box-shadow: var(--shadow-lg);
  display: block;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-s);
  min-height: 48px;
  padding: var(--space-m) var(--space-xl);
  font-family: var(--font-stack);
  font-size: var(--fs-body);
  font-weight: 600;
  letter-spacing: -0.003em;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}
/* Light: white text on the deep-green fill — readable in normal AND :hover
   (accent #0E6B40 → 6.57:1, accent-strong #0A5230 → 9.28:1). The old dark-green
   text vanished on the darker hover fill. Dark mode keeps dark text on the neon fill. */
.btn-primary { background: var(--khassinx-accent); color: #FFFFFF; }
@media (prefers-color-scheme: dark) { .btn-primary { color: #04140C; } }
.btn-primary:hover { background: var(--khassinx-accent-strong); text-decoration: none; transform: translateY(-1px); }
.btn-secondary { background: transparent; color: var(--khassinx-accent); border-color: var(--khassinx-accent); }
.btn-secondary:hover { background: var(--khassinx-accent-soft); color: var(--khassinx-accent-strong); text-decoration: none; }
.btn[aria-disabled="true"] { opacity: 0.55; pointer-events: none; }

/* ── Card ── */
.card {
  background: var(--khassinx-bg-card);
  border: 1px solid var(--khassinx-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: transform var(--transition-base);
}
.card .emoji { font-size: 32px; line-height: 1; display: block; margin-bottom: var(--space-m); }
.card h3 { margin-bottom: var(--space-m); color: var(--khassinx-text-primary); font-size: var(--fs-h3); letter-spacing: -0.003em; }
.card p { color: var(--khassinx-text-secondary); font-size: var(--fs-body); line-height: 1.47; }
.cards-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-lg); margin-top: var(--space-2xl); }
@media (min-width: 768px) { .cards-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 980px) { .cards-grid.cols-4 { grid-template-columns: repeat(4, 1fr); } }

/* ── Section ── */
.section { padding: var(--space-5xl) 0; }
@media (min-width: 768px) { .section { padding: var(--space-6xl) 0; } }
.section-tinted { background: var(--khassinx-bg-section); }
.section h2 {
  text-align: center;
  margin-bottom: var(--space-md);
  font-size: clamp(2rem, 4.5vw, var(--fs-display-m));
  font-weight: 600;
  letter-spacing: -0.018em;
  line-height: 1.1;
}
.section .section-lead {
  text-align: center;
  max-width: 560px;
  margin: 0 auto var(--space-2xl);
  color: var(--khassinx-text-secondary);
  font-size: var(--fs-body-l);
}

/* ── Cipher demo strip (playful) ── */
.cipher-demo {
  max-width: 560px;
  margin: var(--space-2xl) auto 0;
  background: var(--khassinx-bg-card);
  border: 1px solid var(--khassinx-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
}
.cipher-demo .plain { font-size: var(--fs-h3); font-weight: 600; color: var(--khassinx-text-primary); }
.cipher-demo .arrow { font-size: var(--fs-h3); color: var(--khassinx-accent); margin: var(--space-s) 0; display: block; }
.cipher-demo .secret { font-size: 28px; line-height: 1.4; letter-spacing: 4px; }
.cipher-demo .caption { margin-top: var(--space-md); font-size: var(--fs-caption); color: var(--khassinx-text-tertiary); }

/* ── FAQ ── */
.faq { max-width: 720px; margin: 0 auto; }
.faq details {
  border-bottom: 1px solid var(--khassinx-border);
  padding: var(--space-md) 0;
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: var(--fs-body-l);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--khassinx-accent); font-size: var(--fs-h3); transition: transform var(--transition-fast); }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin-top: var(--space-md); color: var(--khassinx-text-secondary); }

/* ── Steps (support) ── */
.steps { max-width: 720px; margin: var(--space-2xl) auto 0; counter-reset: step; list-style: none; }
.steps li {
  position: relative;
  padding: var(--space-md) 0 var(--space-md) var(--space-4xl);
  border-bottom: 1px solid var(--khassinx-border);
}
.steps li:last-child { border-bottom: none; }
.steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: var(--space-md);
  width: 40px;
  height: 40px;
  background: var(--khassinx-accent-soft);
  color: var(--khassinx-accent);
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}
.steps li strong { display: block; margin-bottom: var(--space-xs); }
.steps li span { color: var(--khassinx-text-secondary); }

/* ── Creator credit ── */
.credit {
  text-align: center;
  max-width: 520px;
  margin: 0 auto;
}
.credit .handle { font-size: var(--fs-h2); font-weight: 700; color: var(--khassinx-accent); }
.credit .handle-cipher { font-size: var(--fs-h3); letter-spacing: 3px; margin-top: var(--space-s); }
.credit .role { color: var(--khassinx-text-secondary); margin-top: var(--space-s); }

/* ── Prose (legal / support pages) ── */
.prose { max-width: 720px; margin: 0 auto; font-size: var(--fs-body); line-height: 1.55; color: var(--khassinx-text-primary); }
.prose h1 { font-size: clamp(2rem, 5vw, var(--fs-h1)); margin-bottom: var(--space-s); }
.prose .updated { color: var(--khassinx-text-tertiary); font-size: var(--fs-body-s); margin-bottom: var(--space-2xl); display: block; }
.prose h2 { margin-top: var(--space-3xl); margin-bottom: var(--space-md); font-size: var(--fs-h2); text-align: left; }
.prose h3 { margin-top: var(--space-2xl); margin-bottom: var(--space-m); font-size: var(--fs-h3); }
.prose p, .prose ul, .prose ol { margin-bottom: var(--space-md); }
.prose ul, .prose ol { padding-left: var(--space-xl); }
.prose li { margin-bottom: var(--space-s); }
.prose blockquote {
  border-left: 3px solid var(--khassinx-accent);
  padding-left: var(--space-md);
  margin: var(--space-lg) 0;
  color: var(--khassinx-text-secondary);
}
.prose hr { border: none; border-top: 1px solid var(--khassinx-border); margin: var(--space-2xl) 0; }
.callout {
  background: var(--khassinx-accent-soft);
  border: 1px solid var(--khassinx-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin: var(--space-lg) 0;
}
.callout p { margin: 0; }

/* ── Footer ── */
.site-footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--khassinx-border);
  background: var(--khassinx-bg-section);
  color: var(--khassinx-text-secondary);
  font-size: var(--fs-body-s);
}
.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}
.site-footer nav { display: flex; gap: var(--space-md); flex-wrap: wrap; }
.site-footer nav a {
  color: var(--khassinx-text-secondary);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  font-size: var(--fs-body-s);
}
.site-footer nav a:hover { color: var(--khassinx-text-primary); text-decoration: none; }
.footer-copyright { font-weight: 500; }
.locale-switcher { display: inline-flex; gap: var(--space-xs); align-items: center; color: var(--khassinx-text-tertiary); }
.locale-switcher [aria-current="true"] { color: var(--khassinx-text-primary); font-weight: 600; }
.footer-ecosystem {
  display: block;
  width: 100%;
  margin-top: var(--space-md);
  font-size: var(--fs-caption);
  color: var(--khassinx-text-tertiary);
}
.footer-trademarks {
  display: block;
  width: 100%;
  margin-top: var(--space-xs);
  font-size: var(--fs-caption);
  color: var(--khassinx-text-tertiary);
}

/* ── Utility ── */
.text-center { text-align: center; }
.text-secondary { color: var(--khassinx-text-secondary); }
.text-tertiary { color: var(--khassinx-text-tertiary); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}