/* Financially Sovereign Academy: Brand Tokens & Components
   Sister brand to Bitcoin Sovereign Academy: same editorial grammar
   (Playfair Display + Crimson Pro + Inter + JetBrains Mono, sharp 2px
   radius, 4px spacing, the diagonal brand fade), palette translated
   from BSA's orange/yellow to FSA's emerald/mint on neutral dark.

   Identity: neutral dark surfaces, white/gray text, emerald + mint as
   accent only. The teal->emerald->mint fade is the signature, used only
   on headline accents, card outlines, and button outlines. Buttons are
   never filled with green. No yellow. No pale-green surfaces.

   Canonical source of truth for FSA visual tokens. Date: 2026-06-24.
*/

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,500;0,700;0,900;1,500;1,700&family=Crimson+Pro:ital,wght@0,400;0,600;1,400&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  /* ---- Accent (emerald/mint): accent use only, never large fields ---- */
  --color-brand:        #10B981;   /* emerald, primary accent / action */
  --color-brand-soft:   #0D9668;   /* deeper emerald */
  --color-brand-deep:   #047857;   /* deepest emerald (AA text on dark edge cases) */
  --color-mint:         #6EE7B7;   /* bright accent: numbers, links, diamonds */
  --color-mint-bright:  #A7F3D0;

  /* ---- Signature fade (B): teal -> emerald -> aqua-mint ---- */
  --brand-gradient:            linear-gradient(135deg, #0F766E 0%, #10B981 50%, #5EEAD4 100%);
  --brand-gradient-horizontal: linear-gradient(90deg,  #0F766E 0%, #10B981 50%, #5EEAD4 100%);

  /* ---- Neutral dark surface system (no green tint) ---- */
  --color-bg:        #0E1013;   /* page background, near-black neutral */
  --color-surface:   #16181C;   /* alt sections, panels */
  --color-elevated:  #1C1F24;   /* cards */
  --color-deepest:   #08090B;   /* dramatic / CTA bands */
  --color-border:    #2A2E35;   /* default neutral border */
  --color-border-strong: #3A3F47;

  /* ---- Text (white / neutral gray) ---- */
  --color-text:        #F4F6F7;  /* body */
  --color-text-strong: #FFFFFF;  /* headings emphasis */
  --color-muted:       #A8B0B8;  /* supporting copy */
  --color-faint:       #6B7280;  /* captions, disabled: never body text */
  --ink-on-brand:      #06231A;  /* dark ink for the rare on-emerald label */

  /* ---- Semantic alerts (solid, never gradient) ---- */
  --color-success: #10B981;
  --color-warning: #F59E0B;   /* the one warm accent, alerts only */
  --color-error:   #F87171;
  --color-info:    #60A5FA;

  /* ---- Typography ---- */
  --font-serif: 'Playfair Display', Georgia, serif;     /* h1, h2 */
  --font-body:  'Crimson Pro', Georgia, Cambria, serif; /* body */
  --font-sans:  'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; /* UI, labels, h3/h4 */
  --font-mono:  'JetBrains Mono', ui-monospace, 'SF Mono', monospace; /* labels, data, chips */

  --fs-h1: clamp(2.1rem, 5vw, 3.4rem);
  --fs-h2: clamp(1.6rem, 3.2vw, 2.3rem);
  --fs-h3: 1.15rem;
  --fs-h4: 1rem;
  --fs-lede: 1.2rem;
  --fs-body: 1.05rem;
  --fs-small: 0.9rem;
  --fs-eyebrow: 0.72rem;
  --fs-mono: 0.85rem;

  /* ---- Spacing (4px base) ---- */
  --space-1: 4px;  --space-2: 8px;  --space-3: 12px; --space-4: 16px;
  --space-6: 24px; --space-8: 32px; --space-12: 48px; --space-16: 64px; --space-20: 80px;
  --space-section: clamp(2.75rem, 5vw, 4rem);

  /* ---- Layout ---- */
  --width-prose: 680px;
  --width-content: 760px;
  --width-default: 1100px;
  --width-wide: 1280px;

  /* ---- Radius (sharp editorial) ---- */
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --radius-pill: 999px;
  --radius-button: 2px;

  /* ---- Shadows (deep, for dark surfaces) ---- */
  --shadow-1: 0 2px 10px rgba(0, 0, 0, 0.40);
  --shadow-2: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-card: 0 14px 44px rgba(0, 0, 0, 0.55);

  /* ---- Motion ---- */
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  font-size: 18px;
  min-height: 100vh;
}

a { color: var(--color-mint); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ============================================================
   Layout helpers
   ============================================================ */
.fsa-container, .fsa-wrap {
  max-width: var(--width-default);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.fsa-container--prose { max-width: var(--width-prose); }
.fsa-container--content { max-width: var(--width-content); }

.fsa-section { padding: var(--space-section) 0; border-top: 1px solid var(--color-border); }
.fsa-section--alt { background: var(--color-surface); }
.fsa-section--deep {
  background: var(--color-deepest);
  position: relative;
  overflow: hidden;
}
/* single subtle "lit from within" glow for hero / CTA bands */
.fsa-section--glow::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 35%, rgba(16, 185, 129, 0.10) 0%, transparent 58%);
  pointer-events: none;
}
.fsa-section--glow > * { position: relative; }

.fsa-divider { border: 0; border-top: 1px solid var(--color-border); }

/* ============================================================
   Typography
   ============================================================ */
.fsa-h1, h1.fsa {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--fs-h1);
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--color-text-strong);
}
.fsa-h2, h2.fsa {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--fs-h2);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--color-text-strong);
}
.fsa-h3, h3.fsa {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--fs-h3);
  letter-spacing: -0.005em;
  color: var(--color-text);
}
.fsa-h4, h4.fsa {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--fs-h4);
  color: var(--color-text);
}

/* Gradient accent on headline emphasis (one of the 3 permitted fade surfaces).
   Always provide a solid fallback color for browsers without bg-clip:text. */
.fsa-h1 em, h1.fsa em,
.fsa-h2 em, h2.fsa em,
.fsa-accent-text {
  font-style: italic;
  color: var(--color-mint); /* fallback */
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.fsa-lede {
  font-size: var(--fs-lede);
  color: var(--color-muted);
  max-width: var(--width-prose);
  line-height: 1.6;
}

.fsa-eyebrow {
  font-family: var(--font-sans);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  color: var(--color-mint);
}

/* Section tag: mono-uppercase chip with a mint diamond */
.fsa-section-tag {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-text);
}
.fsa-section-tag::before {
  content: '\25C6'; /* diamond */
  font-size: 8px;
  color: var(--color-mint);
}

.fsa-mono { font-family: var(--font-mono); font-size: var(--fs-mono); }

/* Pull quote */
.fsa-pullquote {
  border-left: 2px solid var(--color-brand);
  font-family: var(--font-serif);
  font-style: italic;
  padding: 0.4rem 0 0.4rem 1.4rem;
  color: var(--color-text);
}

/* ============================================================
   Buttons: gradient OUTLINE, light text, never green-filled
   The inner fill must match the surface the button sits on; override
   --btn-bg on dark sections (e.g. .fsa-section--deep button { --btn-bg: var(--color-deepest); }).
   ============================================================ */
.fsa-btn {
  --btn-bg: var(--color-bg);
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-button);
  border: 1.6px solid transparent;
  color: var(--color-text);
  cursor: pointer;
  transition: var(--transition-base);
}
.fsa-btn:hover { text-decoration: none; }

.fsa-btn--primary {
  background:
    linear-gradient(var(--btn-bg), var(--btn-bg)) padding-box,
    var(--brand-gradient) border-box;
  color: var(--color-text);
}
.fsa-btn--primary:hover {
  color: var(--color-text-strong);
  transform: translateY(-1px);
  box-shadow: var(--shadow-2);
}

.fsa-btn--secondary {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}
.fsa-btn--secondary:hover {
  border-color: var(--color-mint);
  color: var(--color-mint);
}

/* On deep/alt surfaces, keep the button center matched to the surface */
.fsa-section--alt .fsa-btn { --btn-bg: var(--color-surface); }
.fsa-section--deep .fsa-btn { --btn-bg: var(--color-deepest); }

/* Small mono chip (e.g. Open / PDF / DOCX links) */
.fsa-chip {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.78rem;
  color: var(--color-mint);
  border: 1px solid var(--color-brand);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  white-space: nowrap;
  transition: var(--transition-base);
}
.fsa-chip:hover { background: rgba(16, 185, 129, 0.12); text-decoration: none; }
.fsa-chip--muted { color: var(--color-muted); border-color: var(--color-border); }

/* ============================================================
   Cards
   ============================================================ */
.fsa-card {
  background: var(--color-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-1);
  transition: var(--transition-base);
}
.fsa-card--hover:hover {
  transform: translateY(-2px);
  border-color: var(--color-brand);
  box-shadow: var(--shadow-card);
}

/* Gradient-bordered card (permitted fade surface): layered-backgrounds.
   --card-bg must match the inner card color for the surface it's on. */
.fsa-card--gradient {
  --card-bg: var(--color-elevated);
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(var(--card-bg), var(--card-bg)) padding-box,
    var(--brand-gradient) border-box;
  padding: 1.6rem 1.8rem;
  box-shadow: var(--shadow-1);
}

/* Mono data panel (e.g. the cost comparison) */
.fsa-panel {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  line-height: 1.9;
  background: var(--color-deepest);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.4rem 1.6rem;
  color: var(--color-text);
}
.fsa-panel__label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 0.7rem;
}
.fsa-panel__accent { color: var(--color-mint); font-weight: 700; }

/* Diamond list */
.fsa-list { list-style: none; }
.fsa-list li {
  padding: 0.45rem 0 0.45rem 1.7rem;
  position: relative;
  border-bottom: 1px solid var(--color-border);
}
.fsa-list li::before {
  content: '\25C6';
  position: absolute;
  left: 0;
  top: 0.7rem;
  color: var(--color-mint);
  font-size: 0.7rem;
}

/* Badge / pill */
.fsa-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--color-mint);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
}

/* ============================================================
   Accessibility
   ============================================================ */
*:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: 3px;
}
.fsa-btn:focus-visible, a:focus-visible {
  outline: 2px solid var(--color-mint);
  outline-offset: 4px;
}

/* Touch targets (WCAG 2.5.5) */
.fsa-btn, .fsa-chip { min-height: 44px; display: inline-flex; align-items: center; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.fsa-sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border-width: 0;
}

.fsa-skip-link {
  position: absolute; top: -40px; left: 0;
  background: var(--color-brand); color: var(--ink-on-brand);
  padding: 8px 12px; z-index: 100; font-family: var(--font-sans); font-weight: 600;
}
.fsa-skip-link:focus { top: 0; }

/* Legal footer (locked footer convention) */
.fsa-legal-footer {
  padding: 2.2rem 1rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--color-muted);
  line-height: 1.5;
}

/* Print */
@media print {
  body { background: #fff; color: #000; }
  .fsa-no-print { display: none !important; }
}