/**
 * brand.css — FrameOS visual identity system.
 *
 * Defines: CSS custom properties, typography scale, motion tokens,
 * component states. Loaded before page-specific styles.
 *
 * Does NOT own page-specific layout or component styles — those live in
 * theme.css (landing) and inline portal styles.
 */

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  /* Colors */
  --frame-bg:           #0e0e12;
  --frame-bg-2:         #14141a;
  --frame-bg-3:         #1a1a22;
  --frame-cream:        #f4efe6;
  --frame-cream-2:      #ede8dc;
  --frame-cream-3:      #e8e2d6;
  --frame-amber:        #d4a843;
  --frame-amber-dim:    #a8863a;
  --frame-amber-glow:   rgba(212, 168, 67, 0.12);
  --frame-amber-subtle: rgba(212, 168, 67, 0.06);
  --frame-sage:         #8a9e7d;
  --frame-sage-dim:     #6a7e61;
  --frame-dark-text:    #1a1a1e;
  --frame-mid-text:     #5a5a62;
  --frame-light-text:   #c0bdb8;
  --frame-bright:       #ffffff;
  --frame-error:        #a84040;
  --frame-error-subtle:  rgba(168, 64, 64, 0.15);
  --frame-success:      #8a9e7d;
  --frame-success-subtle: rgba(138, 158, 125, 0.15);

  /* Border */
  --frame-border:       rgba(212, 168, 67, 0.15);
  --frame-border-soft:  rgba(212, 168, 67, 0.08);
  --frame-border-dark:  rgba(255, 255, 255, 0.05);
  --frame-border-mid:   rgba(26, 26, 30, 0.12);

  /* Shadows */
  --frame-shadow-sm:    0 2px 8px rgba(0,0,0,0.25);
  --frame-shadow-md:    0 4px 20px rgba(0,0,0,0.35);
  --frame-shadow-glow:   0 0 20px rgba(212,168,67,0.08);
  --frame-shadow-glow-lg: 0 0 40px rgba(212,168,67,0.12);

  /* ── Typography Scale ──────────────────────────────────── */
  --font-display:       'Playfair Display', Georgia, serif;
  --font-body:          'DM Sans', system-ui, sans-serif;
  --font-mono:          'DM Mono', 'Courier New', monospace;

  --text-xs:   0.6rem;    /* 9.6px — labels, meta */
  --text-sm:   0.72rem;   /* 11.5px — secondary labels */
  --text-base: 0.85rem;   /* 13.6px — body, inputs */
  --text-md:   1rem;      /* 16px — body text */
  --text-lg:   1.2rem;    /* 19px — card titles */
  --text-xl:   1.5rem;    /* 24px — section headings */
  --text-2xl:  1.8rem;    /* 28px — portal headings */
  --text-3xl:  2.4rem;    /* 38px — page headings */
  --text-hero: clamp(2.6rem, 5vw, 4.2rem);
  --text-display: clamp(3.5rem, 7vw, 6rem);

  /* ── Spacing ───────────────────────────────────────────── */
  --sp-1: 0.25rem;   /* 4px */
  --sp-2: 0.5rem;    /* 8px */
  --sp-3: 0.75rem;   /* 12px */
  --sp-4: 1rem;      /* 16px */
  --sp-5: 1.25rem;   /* 20px */
  --sp-6: 1.5rem;    /* 24px */
  --sp-8: 2rem;      /* 32px */
  --sp-10: 2.5rem;   /* 40px */
  --sp-12: 3rem;     /* 48px */
  --sp-16: 4rem;     /* 64px */
  --sp-20: 5rem;     /* 80px */

  /* ── Motion ────────────────────────────────────────────── */
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:     cubic-bezier(0.7, 0, 0.84, 0);
  --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  --dur-fast:    150ms;
  --dur-base:    250ms;
  --dur-slow:    400ms;
  --dur-xslow:   600ms;

  /* ── Border Radius ─────────────────────────────────────── */
  --radius-sm:  2px;
  --radius-md:  4px;
  --radius-lg:  8px;
  --radius-pill: 999px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Text Selection ───────────────────────────────────────── */
::selection {
  background: var(--frame-amber);
  color: var(--frame-bg);
}

/* ── Focus Visible ─────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--frame-amber);
  outline-offset: 2px;
}

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--frame-amber);
  opacity: 0.35;
  border-radius: 3px;
}

/* ── Typography Utilities ──────────────────────────────────── */
.label-xs {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--frame-amber-dim);
  opacity: 0.8;
}

.label-sm {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--frame-amber-dim);
}

.heading-display {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--frame-bright);
}

.heading-display em {
  font-style: italic;
  color: var(--frame-amber);
}

.text-body {
  font-size: var(--text-md);
  line-height: 1.7;
  color: var(--frame-light-text);
}

.text-muted {
  color: var(--frame-mid-text);
  font-size: var(--text-base);
}

/* ── Button System ─────────────────────────────────────────── */

/* Primary — solid amber, used for main CTAs */
.btn-primary {
  background: var(--frame-amber);
  color: var(--frame-bg);
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out);
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
}
.btn-primary:hover {
  background: var(--frame-amber-dim);
  transform: translateY(-1px);
  box-shadow: var(--frame-shadow-glow);
}
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }

/* Ghost — amber outline, secondary actions */
.btn-ghost {
  background: transparent;
  border: 1px solid rgba(212,168,67,0.4);
  color: var(--frame-amber);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.9rem;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-out),
    border-color var(--dur-base) var(--ease-out);
}
.btn-ghost:hover {
  background: var(--frame-amber-subtle);
  border-color: rgba(212,168,67,0.6);
}

/* Dark — solid dark, used in light-background contexts */
.btn-dark {
  background: var(--frame-dark-text);
  color: var(--frame-amber);
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.75rem 2rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
}
.btn-dark:hover {
  background: #2d2d35;
  transform: translateY(-1px);
}
.btn-dark:disabled { opacity: 0.5; cursor: not-allowed; }

/* ── Card ──────────────────────────────────────────────────── */
.card {
  background: var(--frame-cream);
  border: 1px solid rgba(26,26,30,0.08);
  border-radius: var(--radius-sm);
  padding: var(--sp-8);
  position: relative;
  transition:
    box-shadow var(--dur-base) var(--ease-out),
    transform var(--dur-base) var(--ease-out);
}
.card:hover {
  box-shadow: var(--frame-shadow-sm);
}
.card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--frame-dark-text);
  margin-bottom: var(--sp-6);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid rgba(26,26,30,0.06);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.card-title-icon { font-size: 1rem; color: var(--frame-amber); }

/* Card variant for dark backgrounds */
.card-dark {
  background: var(--frame-bg-2);
  border: 1px solid var(--frame-border);
  border-radius: var(--radius-sm);
  padding: var(--sp-8);
}
.card-dark:hover {
  border-color: rgba(212,168,67,0.25);
  box-shadow: var(--frame-shadow-glow);
}

/* ── Form Elements ─────────────────────────────────────────── */
.field-label {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--frame-amber-dim);
  margin-bottom: var(--sp-2);
  font-weight: 600;
  display: block;
}

.input-base {
  width: 100%;
  background: var(--frame-cream);
  border: 1px solid var(--frame-border-mid);
  border-radius: var(--radius-sm);
  color: var(--frame-dark-text);
  padding: 0.65rem 0.85rem;
  font-family: var(--font-body);
  font-size: var(--text-base);
  outline: none;
  transition:
    border-color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out);
  box-sizing: border-box;
}
.input-base::placeholder { color: var(--frame-mid-text); opacity: 0.7; }
.input-base:focus {
  border-color: var(--frame-amber);
  box-shadow: 0 0 0 3px var(--frame-amber-subtle);
}

.input-dark {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(212,168,67,0.2);
  color: var(--frame-bright);
}
.input-dark:focus { border-color: var(--frame-amber); }
.input-dark::placeholder { color: var(--frame-light-text); opacity: 0.5; }

/* ── Tag Chips ─────────────────────────────────────────────── */
.tag-chip {
  background: var(--frame-amber-subtle);
  border: 1px solid rgba(212,168,67,0.3);
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.7rem;
  font-size: 0.72rem;
  color: var(--frame-amber-dim);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition:
    background var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out);
}
.tag-chip:hover {
  background: rgba(212,168,67,0.12);
  border-color: rgba(212,168,67,0.5);
}

/* ── Status Badges ─────────────────────────────────────────── */
.status-badge {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
}
.status-pending  { background: rgba(212,168,67,0.15); color: var(--frame-amber-dim); }
.status-shipped  { background: var(--frame-success-subtle); color: var(--frame-sage-dim); }
.status-delivered { background: rgba(26,26,30,0.08); color: var(--frame-dark-text); }
.status-cancelled { background: var(--frame-error-subtle); color: var(--frame-error); }

/* ── Nav ───────────────────────────────────────────────────── */
.nav-dark {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: var(--sp-5) var(--sp-10);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(14,14,18,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--frame-border);
}

.nav-brand {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--frame-bright);
}
.nav-brand span { color: var(--frame-amber); }

.nav-meta {
  font-size: var(--text-xs);
  color: var(--frame-light-text);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  opacity: 0.7;
}

/* ── Section Label (overline) ──────────────────────────────── */
.overline {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--frame-amber-dim);
  margin-bottom: var(--sp-5);
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}
.overline::before {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--frame-amber-dim);
  opacity: 0.6;
  flex-shrink: 0;
}

/* ── Accent Divider ────────────────────────────────────────── */
.divider-amber {
  height: 1px;
  background: linear-gradient(90deg, var(--frame-amber), transparent);
  border: none;
  margin: var(--sp-6) 0;
}

.divider-amber-subtle {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--frame-amber), transparent);
  border: none;
  width: 60px;
  margin: var(--sp-6) auto;
  opacity: 0.6;
}

/* ── Toast ─────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: var(--sp-8);
  right: var(--sp-8);
  background: var(--frame-bg);
  color: var(--frame-bright);
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-sm);
  font-size: var(--text-base);
  border: 1px solid var(--frame-border);
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity var(--dur-base) var(--ease-out),
    transform var(--dur-base) var(--ease-out);
  z-index: 9999;
  pointer-events: none;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.success { border-color: var(--frame-sage); }
.toast.error { border-color: var(--frame-error); }

/* ── Entrance Animations ───────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes shimmer {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 1; }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
@keyframes pulseRing {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.04); opacity: 0.7; }
}
@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.animate-fade-up { animation: fadeUp var(--dur-slow) var(--ease-out) both; }
.animate-fade-in { animation: fadeIn var(--dur-slow) var(--ease-out) both; }

/* Staggered entrance delays */
.delay-1 { animation-delay: 100ms; }
.delay-2 { animation-delay: 200ms; }
.delay-3 { animation-delay: 300ms; }
.delay-4 { animation-delay: 400ms; }
.delay-5 { animation-delay: 500ms; }

/* ── Hover Transitions (reusable) ──────────────────────────── */
.hover-lift {
  transition:
    transform var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out);
}
.hover-lift:hover { transform: translateY(-3px); box-shadow: var(--frame-shadow-md); }

.hover-glow {
  transition:
    box-shadow var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out);
}
.hover-glow:hover {
  box-shadow: var(--frame-shadow-glow);
  border-color: rgba(212,168,67,0.3);
}

/* ── Loading Skeleton ──────────────────────────────────────── */
@keyframes skeleton {
  from { background-position: -200% 0; }
  to   { background-position: 200% 0; }
}
.skeleton {
  background: linear-gradient(
    90deg,
    var(--frame-cream-2) 25%,
    var(--frame-cream) 50%,
    var(--frame-cream-2) 75%
  );
  background-size: 200% 100%;
  animation: skeleton 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}
.skeleton-dark {
  background: linear-gradient(
    90deg,
    var(--frame-bg-3) 25%,
    var(--frame-bg-2) 50%,
    var(--frame-bg-3) 75%
  );
  background-size: 200% 100%;
  animation: skeleton 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}