/* ============================================================
   FluidCast Design System — Site Stylesheet
   Derived from the FluidCast Design System (colors_and_type.css)
   Dark-first brand with light mode support via OS detection + toggle.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ── Tokens — Dark Theme (default) ── */
:root {
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'Fira Code', monospace;

  /* Dark theme */
  --bg:            #06090F;
  --surface:       #0B1220;
  --elevated:      #0F1829;
  --overlay:       #162038;

  /* Brand */
  --cyan-300:      #8EE8FA;
  --cyan-400:      #3DD0F0;
  --cyan-500:      #1ABCD8;
  --blue-500:      #1E4FE0;
  --blue-600:      #1740C0;
  --blue-700:      #1032A0;
  --gold-400:      #FFD700;
  --gold-500:      #FFB700;

  /* Foreground (dark) */
  --fg:            #FFFFFF;
  --fg2:           #B8C9E0;
  --fg3:           #6B7A99;
  --fg4:           #3A4A63;

  --border-subtle: rgba(255,255,255,0.08);
  --border-mid:    rgba(255,255,255,0.14);

  /* Light theme */
  --light-bg:      #F7FAFC;
  --light-surface: #FFFFFF;
  --light-text:    #2D3748;
  --light-muted:   #718096;
  --light-border:  #E2E8F0;

  --nav-from:      rgb(44,56,80);
  --nav-to:        rgb(29,40,58);

  /* Gradients */
  --gradient-brand: linear-gradient(135deg, #3DD0F0, #1E4FE0);
  --gradient-text:  linear-gradient(135deg, #8EE8FA 0%, #3DD0F0 40%, #1E4FE0 100%);
  --gradient-hero:  linear-gradient(135deg, #0a1218 0%, #06090F 100%);
  --gradient-gold:  linear-gradient(90deg, #FFD700 0%, #FFB700 100%);
  --gradient-violet: linear-gradient(135deg, #7C8CF8 0%, #5B6BE0 100%);

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-sm: 0 2px 10px rgba(0,0,0,0.20);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.25);
  --shadow-lg: 0 20px 60px -20px rgba(0,0,0,0.60);
  --shadow-card: 0 20px 60px -20px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.04);
  --shadow-light: 0 4px 20px rgba(0,0,0,0.08);
  --glow-cyan: 0 8px 24px -6px rgba(61,208,240,0.5);
}

/* ── Light Mode Theme ── */
html[data-theme="light"],
html.theme-light {
  /* Surfaces — cool, near-white with a faint blue cast */
  --bg:       #F4F7FB;
  --surface:  #FFFFFF;
  --elevated: #FFFFFF;
  --overlay:  #F0F4FA;

  /* Foreground — dark navy ramp */
  --fg:       #0E1726;
  --fg2:      #3C4A60;
  --fg3:      #6B7A99;
  --fg4:      #9FB0C8;

  --border-subtle: #E2E8F0;
  --border-mid:    #CBD8E8;

  /* Brand on light — lean blue for contrast */
  --cyan-300: #0EABC8;
  --cyan-400: #1ABCD8;
  --cyan-500: #1ABCD8;
  --blue-500: #1E4FE0;
  --blue-600: #1740C0;
  --blue-700: #1032A0;

  /* Gradients */
  --gradient-text:   linear-gradient(135deg, #1ABCD8 0%, #1E4FE0 60%, #1740C0 100%);
  --gradient-hero:   linear-gradient(160deg, #FFFFFF 0%, #EAF2FB 55%, #E0EEFA 100%);
  --gradient-brand:  linear-gradient(135deg, #1E4FE0, #1740C0);

  /* Shadows — soft, cool-tinted */
  --shadow-sm:     0 1px 3px rgba(14,23,38,0.06), 0 1px 2px rgba(14,23,38,0.04);
  --shadow-md:     0 4px 16px rgba(14,23,38,0.08);
  --shadow-lg:     0 16px 48px -12px rgba(14,23,38,0.16);
  --shadow-card:   0 4px 20px rgba(14,23,38,0.08);
  --glow-cyan:     0 8px 24px -8px rgba(30,79,224,0.45);
}

/* ── Reset / Base ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; }
a { color: var(--cyan-400); }

::selection { background: rgba(61,208,240,0.28); color: #fff; }

/* ── Layout helpers ── */
.ds-container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.ds-section { padding: 88px 0; }
@media (max-width: 640px) { .ds-section { padding: 60px 0; } }

.ds-eyebrow {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.ds-text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ── Header / Nav ── */
.ds-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(11,18,32,0.72);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background 0.3s ease, border-color 0.3s ease;
}
html[data-theme="light"] .ds-header,
html.theme-light .ds-header {
  background: rgba(244,247,251,0.92);
}
.ds-nav {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.ds-logo {
  display: flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  color: var(--fg);
}
.ds-logo img {
  width: 38px; height: 38px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.35);
}
.ds-logo span {
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.02em;
}
.ds-nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
}
.ds-nav-links a {
  color: var(--fg2);
  text-decoration: none;
  font-weight: 500;
  font-size: 14.5px;
  transition: color 0.2s;
}
.ds-nav-links a:hover { color: var(--fg); }
.ds-nav-cta {
  font-weight: 700 !important;
  font-size: 13.5px !important;
  color: #fff !important;
  background: var(--gradient-brand);
  border-radius: var(--radius-pill);
  padding: 9px 20px;
  box-shadow: var(--glow-cyan);
}
.ds-nav-cta:hover { color: #fff !important; filter: brightness(1.05); }

.ds-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none; border: none;
  z-index: 1001;
}
.ds-burger span {
  width: 24px; height: 2.5px;
  background: #fff;
  border-radius: 2px;
  transition: all 0.3s ease;
  display: block;
}
.ds-burger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.ds-burger.active span:nth-child(2) { opacity: 0; }
.ds-burger.active span:nth-child(3) { transform: rotate(-45deg) translate(6px,-6px); }
html[data-theme="light"] .ds-burger span,
html.theme-light .ds-burger span {
  background: #0E1726;
}

@media (max-width: 860px) {
  .ds-burger { display: flex; }
  .ds-nav-links {
    position: fixed;
    top: 64px;
    right: -100%;
    width: 78%;
    max-width: 320px;
    height: calc(100vh - 64px);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 0;
    background: linear-gradient(160deg, var(--elevated), var(--surface));
    border-left: 1px solid var(--border-subtle);
    box-shadow: -8px 0 40px rgba(0,0,0,0.5);
    transition: right 0.3s ease;
  }
  .ds-nav-links.active { right: 0; }
  .ds-nav-links li { border-bottom: 1px solid var(--border-subtle); }
  .ds-nav-links a { display: block; padding: 16px 24px; font-size: 16px; }
  .ds-nav-cta {
    margin: 14px 24px;
    text-align: center;
    box-shadow: none;
  }
  .ds-nav-links .theme-toggle {
    margin: 14px 24px;
  }
}

/* ── Buttons ── */
.ds-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 16px;
  border: none;
  border-radius: var(--radius-pill);
  padding: 14px 32px;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s, filter 0.2s, background 0.2s;
}
.ds-btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: var(--glow-cyan);
}
.ds-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 36px -8px rgba(61,208,240,0.6); }
html[data-theme="light"] .ds-btn-primary:hover,
html.theme-light .ds-btn-primary:hover { box-shadow: 0 14px 36px -8px rgba(30,79,224,0.4); }
.ds-btn-secondary {
  background: rgba(255,255,255,0.10);
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.25);
}
.ds-btn-secondary:hover { transform: translateY(-2px); background: rgba(255,255,255,0.16); }
html[data-theme="light"] .ds-btn-secondary,
html.theme-light .ds-btn-secondary {
  background: rgba(14,23,38,0.08);
  color: #0E1726;
  border: 1.5px solid rgba(14,23,38,0.2);
}
html[data-theme="light"] .ds-btn-secondary:hover,
html.theme-light .ds-btn-secondary:hover {
  background: rgba(14,23,38,0.14);
}
.ds-btn-light {
  background: #fff;
  color: var(--light-text);
}
.ds-btn-light:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.ds-btn-ghost-light {
  background: #EDF2F7;
  color: var(--light-text);
}
.ds-btn-ghost-light:hover { transform: translateY(-2px); background: #E2E8F0; }

/* ── Platform / mono chips ── */
.ds-chip {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 11.5px;
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  padding: 7px 13px;
  background: rgba(255,255,255,0.05);
  color: #9DB0CF;
  border: 1px solid var(--border-subtle);
}
.ds-chip-active {
  background: var(--gradient-brand);
  color: #fff;
  border: none;
  box-shadow: var(--glow-cyan);
}
html[data-theme="light"] .ds-chip,
html.theme-light .ds-chip {
  background: rgba(14,23,38,0.06);
  color: #3C4A60;
  border: 1px solid #E2E8F0;
}
html[data-theme="light"] .ds-chip-active,
html.theme-light .ds-chip-active {
  background: var(--gradient-brand);
  color: #fff;
}

/* ── Pro / Gold badge ── */
.ds-pro {
  display: inline-block;
  background: var(--gradient-gold);
  color: #2D3748;
  font-weight: 700;
  font-size: 11px;
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  margin-left: 7px;
  vertical-align: middle;
  letter-spacing: 0.01em;
}

/* ── Section headings (light) ── */
.ds-light { background: var(--light-bg); color: var(--light-text); }
.ds-white { background: #fff; color: var(--light-text); }
.ds-section-title {
  font-weight: 800;
  font-size: clamp(1.8rem, 3.4vw, 2.4rem);
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: 10px;
}
.ds-section-sub {
  font-size: 1.05rem;
  color: var(--light-muted);
  text-align: center;
  max-width: 560px;
  margin: 0 auto 52px;
}
.ds-section-title.on-dark { color: #fff; }
.ds-section-sub.on-dark { color: var(--fg3); }
html[data-theme="light"] .ds-light,
html.theme-light .ds-light { background: var(--bg); }
html[data-theme="light"] .ds-white,
html.theme-light .ds-white { background: var(--surface); }

/* ── Footer ── */
.ds-footer {
  background: var(--surface);
  border-top: 1px solid var(--border-subtle);
  padding: 40px 24px 32px;
  text-align: center;
}
.ds-footer-inner { max-width: 1160px; margin: 0 auto; }
.ds-footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.ds-footer-brand img { width: 30px; height: 30px; border-radius: 8px; }
.ds-footer-brand span { font-weight: 800; font-size: 16px; letter-spacing: -0.02em; }
.ds-footer-links {
  display: flex;
  justify-content: center;
  gap: 26px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.ds-footer-links a {
  color: var(--fg2);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}
.ds-footer-links a:hover { color: var(--fg); }
.ds-footer-copy { color: var(--fg4); font-size: 13px; margin-bottom: 4px; }
.ds-footer-copy a { color: var(--fg3); text-decoration: none; }
.ds-footer-copy a:hover { color: var(--fg2); }

/* ── Document / legal pages ── */
.ds-doc-wrap {
  min-height: 100vh;
  background:
    radial-gradient(ellipse at 100% -10%, rgba(61,208,240,0.10), transparent 55%),
    radial-gradient(ellipse at 0% 110%, rgba(30,79,224,0.14), transparent 55%),
    var(--bg);
  padding: 96px 24px 64px;
}
.ds-doc {
  max-width: 760px;
  margin: 0 auto;
  background: var(--elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: 48px 44px;
}
.ds-doc .back-link,
.ds-doc-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 28px;
  color: var(--cyan-400);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
}
.ds-doc .back-link:hover,
.ds-doc-back:hover { color: var(--cyan-300); }
.ds-doc h1 {
  font-weight: 800;
  font-size: 2rem;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 18px;
}
.ds-doc h2 {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--fg);
  margin-top: 32px;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}
.ds-doc h3 { font-weight: 600; font-size: 1.05rem; color: var(--fg); margin-top: 22px; }
.ds-doc p, .ds-doc ul, .ds-doc ol {
  font-size: 1rem;
  color: var(--fg2);
  margin-bottom: 16px;
}
.ds-doc ul, .ds-doc ol { padding-left: 22px; }
.ds-doc li { margin-bottom: 6px; }
.ds-doc strong { color: var(--fg); }
.ds-doc em { color: var(--fg3); }
.ds-doc a { color: var(--cyan-400); text-decoration: underline; text-underline-offset: 2px; }
.ds-doc a:hover { color: var(--cyan-300); }
.ds-doc hr { border: none; border-top: 1px solid var(--border-subtle); margin: 28px 0; }
.ds-doc table { width: 100%; border-collapse: collapse; margin-bottom: 18px; }
.ds-doc th, .ds-doc td {
  border: 1px solid var(--border-subtle);
  padding: 10px 12px;
  text-align: left;
  font-size: 0.95rem;
  color: var(--fg2);
}
.ds-doc th { background: rgba(255,255,255,0.05); color: var(--fg); font-weight: 600; }
@media (max-width: 600px) {
  .ds-doc { padding: 32px 20px; }
  .ds-doc-wrap { padding-top: 80px; }
  .ds-doc h1 { font-size: 1.7rem; }
  .ds-doc table { font-size: 0.82rem; }
  .ds-doc th, .ds-doc td { padding: 7px 8px; }
}

/* ── Doc callout / note ── */
.ds-doc .callout {
  background: rgba(61,208,240,0.06);
  border-left: 4px solid var(--cyan-400);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  margin-bottom: 22px;
}
.ds-doc .callout p { margin: 0; color: var(--fg2); }
.ds-doc .callout p + p { margin-top: 10px; }

/* ── Cookie Consent (shared) ── */
#cookie-consent-dialog {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: transparent;
  z-index: 9999;
  font-family: var(--font-sans);
  pointer-events: none;
}
#cookie-consent-dialog.hidden { display: none; }
.cookie-consent-box {
  background: var(--elevated);
  color: var(--fg);
  border: 1px solid var(--border-subtle);
  border-radius: 16px 16px 0 0;
  box-shadow: 0 -10px 40px rgba(0,0,0,0.45);
  max-width: 100%;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  animation: cookieSlideUp 0.3s ease-out;
  pointer-events: auto;
}
@keyframes cookieSlideUp {
  from { transform: translateY(100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
@media (min-width: 768px) {
  .cookie-consent-box {
    border-radius: 16px;
    max-width: 600px;
    width: auto;
    max-height: none;
    margin: 0 20px 20px 0;
    align-self: flex-end;
  }
}
.cookie-content, .cookie-preferences { padding: 24px; }
.cookie-preferences { display: none; }
.cookie-close-btn {
  position: absolute; top: 12px; right: 12px;
  background: none; border: none; font-size: 20px;
  cursor: pointer; color: var(--fg3);
}
.cookie-close-btn:hover { color: var(--fg); }
.cookie-title { font-size: 18px; font-weight: 700; margin: 0 0 8px; color: var(--fg); }
.cookie-description { font-size: 14px; color: var(--fg2); margin-bottom: 16px; line-height: 1.5; }
.cookie-description a { color: var(--cyan-400); text-decoration: none; }
.cookie-description a:hover { text-decoration: underline; }
.cookie-toggle { display: flex; align-items: center; margin-bottom: 16px; padding: 8px 0; }
.cookie-toggle input[type="checkbox"] {
  width: 16px; height: 16px; margin-right: 10px;
  cursor: pointer; accent-color: var(--cyan-400);
}
.cookie-toggle label { flex: 1; cursor: pointer; font-size: 14px; color: var(--fg); }
.cookie-toggle-description {
  font-size: 13px; color: var(--fg3);
  margin-left: 26px; margin-top: -6px; margin-bottom: 10px;
}
.cookie-buttons { display: flex; gap: 12px; margin-top: 20px; }
@media (max-width: 480px) { .cookie-buttons { flex-direction: column; } }
.cookie-btn {
  flex: 1; padding: 11px 16px;
  border-radius: var(--radius-pill);
  border: none; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: all 0.2s ease; font-family: inherit;
}
.cookie-btn-accept, .cookie-btn-save { background: var(--gradient-brand); color: #fff; }
.cookie-btn-accept:hover, .cookie-btn-save:hover { filter: brightness(1.06); }
.cookie-btn-reject {
  background: rgba(255,255,255,0.06); color: var(--fg);
  border: 1px solid var(--border-mid);
}
.cookie-btn-reject:hover { background: rgba(255,255,255,0.1); }
.cookie-btn-settings {
  background: transparent; color: var(--cyan-400);
  border: 1px solid var(--cyan-500);
}
.cookie-btn-settings:hover { background: rgba(61,208,240,0.08); }
.cookie-back-btn {
  display: flex; align-items: center; background: none; border: none;
  color: var(--cyan-400); cursor: pointer; font-size: 14px; font-weight: 600;
  margin-bottom: 16px; padding: 0; font-family: inherit;
}
.cookie-back-btn:hover { text-decoration: underline; }
.cookie-back-btn::before { content: "←"; margin-right: 8px; }

/* ── Utility ── */
.ds-no-scroll { overflow: hidden; }