/* ============================================================
   MotionReach — Design Tokens
   v1.0 — Foundation
   ============================================================ */

:root {
  /* ---------- Brand Core (immutable) ---------- */
  --brand-black:        #000000;
  --brand-purple-dark:  #221177;
  --brand-purple-mid:   #5B2D9A;
  --brand-purple-light: #9437FF;   /* Sugar Grape — primary */
  --brand-cyan:         #73FDFF;   /* Blue Ancient Ice */
  --brand-cyan-deep:    #007A8C;   /* Light-mode-safe cyan */
  --brand-white:        #FFFFFF;

  /* Signature Motion Gradients */
  --motion-gradient: linear-gradient(135deg, #221177 0%, #5B2D9A 80%, #9437FF 100%);
  --motion-gradient-radial: radial-gradient(circle at 30% 20%, #9437FF 0%, #5B2D9A 40%, #221177 100%);

  /* ---------- Typography ---------- */
  --font-en: "Bounded", "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-th: "Noto Sans Thai", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Consolas, monospace;

  /* ---------- Spacing (4px base) ---------- */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  24px;
  --space-6:  32px;
  --space-7:  48px;
  --space-8:  64px;
  --space-9:  96px;
  --space-10: 128px;

  /* ---------- Radius ---------- */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   20px;
  --radius-pill: 9999px;

  /* ---------- Motion ---------- */
  --easing-standard:   cubic-bezier(0.4, 0.0, 0.2, 1);
  --easing-accelerate: cubic-bezier(0.4, 0.0, 1, 1);
  --easing-decelerate: cubic-bezier(0.0, 0.0, 0.2, 1);
  --easing-emphasized: cubic-bezier(0.2, 0.0, 0, 1);
  --duration-instant: 100ms;
  --duration-fast:    200ms;
  --duration-medium:  300ms;
  --duration-slow:    500ms;

  /* ---------- Semantic (dark default) ---------- */
  --success: #22D389;
  --warning: #FFB547;
  --danger:  #FF5E7A;
  --info:    #73FDFF;
}

/* ---------- Dark mode (default scheme) ---------- */
[data-theme="dark"], :root {
  --bg-primary:   #000000;
  --bg-secondary: #0D0820;
  --bg-tertiary:  #1A1238;
  --bg-overlay:   rgba(0, 0, 0, 0.65);

  --text-primary:    #FFFFFF;
  --text-secondary:  rgba(255, 255, 255, 0.75);
  --text-tertiary:   rgba(255, 255, 255, 0.50);
  --text-disabled:   rgba(255, 255, 255, 0.30);
  --text-accent:     #73FDFF;
  --text-on-purple:  #FFFFFF;

  --border-subtle:  rgba(255, 255, 255, 0.08);
  --border-default: rgba(255, 255, 255, 0.15);
  --border-strong:  rgba(255, 255, 255, 0.30);
  --border-accent:  #73FDFF;

  --interactive-primary:        #9437FF;
  --interactive-primary-hover:  #A554FF;
  --interactive-primary-active: #7E2BE6;
  --interactive-secondary:        rgba(255, 255, 255, 0.10);
  --interactive-secondary-hover:  rgba(255, 255, 255, 0.18);
  --interactive-accent:        #73FDFF;
  --interactive-accent-text:   #000000;

  --success: #22D389;
  --warning: #FFB547;
  --danger:  #FF5E7A;
  --info:    #73FDFF;

  /* Elevation — dark uses glow */
  --elevation-1: 0 1px 2px rgba(0, 0, 0, 0.4);
  --elevation-2: 0 4px 12px rgba(0, 0, 0, 0.5), 0 0 1px rgba(148, 55, 255, 0.15);
  --elevation-3: 0 12px 32px rgba(0, 0, 0, 0.6), 0 0 24px rgba(148, 55, 255, 0.10);
  --elevation-glow-cyan:   0 0 24px rgba(115, 253, 255, 0.35);
  --elevation-glow-purple: 0 0 32px rgba(148, 55, 255, 0.40);
}

/* ---------- Light mode ---------- */
[data-theme="light"] {
  --bg-primary:   #FFFFFF;
  --bg-secondary: #F7F5FB;
  --bg-tertiary:  #EDE9F5;
  --bg-overlay:   rgba(13, 8, 32, 0.45);

  --text-primary:   #0D0820;
  --text-secondary: rgba(13, 8, 32, 0.70);
  --text-tertiary:  rgba(13, 8, 32, 0.50);
  --text-disabled:  rgba(13, 8, 32, 0.30);
  --text-accent:    #007A8C;
  --text-brand:     #5B2D9A;

  --border-subtle:  rgba(13, 8, 32, 0.08);
  --border-default: rgba(13, 8, 32, 0.15);
  --border-strong:  rgba(13, 8, 32, 0.40);
  --border-accent:  #5B2D9A;

  --interactive-primary:        #5B2D9A;
  --interactive-primary-hover:  #4F2487;
  --interactive-primary-active: #3F1D6E;
  --interactive-secondary:        rgba(13, 8, 32, 0.06);
  --interactive-secondary-hover:  rgba(13, 8, 32, 0.10);
  --interactive-accent:        #007A8C;
  --interactive-accent-text:   #FFFFFF;

  --success: #0D9D5F;
  --warning: #B87B14;
  --danger:  #C42848;
  --info:    #007A8C;

  --elevation-1: 0 1px 2px rgba(13, 8, 32, 0.06);
  --elevation-2: 0 4px 12px rgba(13, 8, 32, 0.08);
  --elevation-3: 0 12px 32px rgba(13, 8, 32, 0.12);
  --elevation-glow-cyan:   0 0 0 rgba(0,0,0,0);
  --elevation-glow-purple: 0 4px 16px rgba(91, 45, 154, 0.20);
}

/* ============================================================
   Base elements
   ============================================================ */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-en);
  font-weight: 300;
  background: var(--bg-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-variant-numeric: tabular-nums;
}
:lang(th) { font-family: var(--font-th); }

/* ============================================================
   Typography utilities
   ============================================================ */
.t-display-2xl { font-size: 72px; line-height: 80px; font-weight: 600; letter-spacing: -0.02em; }
.t-display-xl  { font-size: 60px; line-height: 68px; font-weight: 600; letter-spacing: -0.02em; }
.t-display-lg  { font-size: 48px; line-height: 56px; font-weight: 600; letter-spacing: -0.015em; }
.t-heading-xl  { font-size: 36px; line-height: 44px; font-weight: 600; letter-spacing: -0.01em; }
.t-heading-lg  { font-size: 28px; line-height: 36px; font-weight: 600; }
.t-heading-md  { font-size: 22px; line-height: 30px; font-weight: 600; }
.t-heading-sm  { font-size: 18px; line-height: 26px; font-weight: 600; }
.t-body-lg     { font-size: 16px; line-height: 24px; font-weight: 300; }
.t-body-md     { font-size: 14px; line-height: 22px; font-weight: 300; }
.t-body-sm     { font-size: 13px; line-height: 20px; font-weight: 300; }
.t-caption     { font-size: 12px; line-height: 16px; font-weight: 300; }
.t-eyebrow     { font-size: 12px; line-height: 16px; font-weight: 400; text-transform: uppercase; letter-spacing: 0.12em; }
.t-code        { font-family: var(--font-mono); font-size: 13px; line-height: 20px; font-weight: 400; }
:lang(th).t-body-lg, :lang(th) .t-body-lg { line-height: 28px; font-weight: 400; }
:lang(th).t-body-md, :lang(th) .t-body-md { line-height: 26px; font-weight: 400; }
:lang(th).t-heading-lg, :lang(th) .t-heading-lg { line-height: 40px; }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  font-family: var(--font-en);
  font-weight: 400;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  padding: 0 var(--space-4);
  height: 40px;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  transition: background var(--duration-fast) var(--easing-standard),
              transform var(--duration-instant) var(--easing-standard),
              box-shadow var(--duration-fast) var(--easing-standard),
              border-color var(--duration-fast) var(--easing-standard);
  white-space: nowrap;
  user-select: none;
}
.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--bg-primary), 0 0 0 4px var(--border-accent);
}
.btn:active { transform: translateY(1px); }
.btn[disabled], .btn.is-disabled {
  opacity: 0.4;
  pointer-events: none;
}

/* sizes */
.btn-sm { height: 32px; padding: 0 var(--space-3); font-size: 13px; border-radius: var(--radius-md); }
.btn-md { height: 40px; padding: 0 var(--space-4); font-size: 14px; }
.btn-lg { height: 48px; padding: 0 var(--space-5); font-size: 15px; border-radius: var(--radius-lg); }
.btn-xl { height: 56px; padding: 0 var(--space-6); font-size: 16px; border-radius: var(--radius-lg); }

/* primary */
.btn-primary {
  background: var(--interactive-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--interactive-primary-hover); box-shadow: var(--elevation-glow-purple); }
.btn-primary:active { background: var(--interactive-primary-active); }

/* accent (cyan) */
.btn-accent {
  background: var(--interactive-accent);
  color: var(--interactive-accent-text);
}
.btn-accent:hover { box-shadow: var(--elevation-glow-cyan); }

/* secondary */
.btn-secondary {
  background: var(--interactive-secondary);
  color: var(--text-primary);
}
.btn-secondary:hover { background: var(--interactive-secondary-hover); }

/* ghost */
.btn-ghost {
  background: transparent;
  color: var(--text-primary);
}
.btn-ghost:hover { background: var(--interactive-secondary); }

/* danger */
.btn-danger {
  background: var(--danger);
  color: #fff;
}

/* gradient mega CTA — marketing only */
.btn-gradient {
  background: var(--motion-gradient);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.btn-gradient::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 30%, rgba(255,255,255,0.25) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.7s var(--easing-emphasized);
}
.btn-gradient:hover::after { transform: translateX(100%); }
.btn-gradient:hover { box-shadow: var(--elevation-glow-purple); }

/* ============================================================
   Inputs
   ============================================================ */
.field { display: flex; flex-direction: column; gap: var(--space-2); }
.field-label {
  font-size: 13px;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}
.input {
  font-family: var(--font-en);
  font-weight: 300;
  height: 40px;
  padding: 0 var(--space-3);
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  font-size: 14px;
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
  width: 100%;
}
.input::placeholder { color: var(--text-tertiary); }
.input:hover { border-color: var(--border-strong); }
.input:focus {
  outline: none;
  border-color: var(--border-accent);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--border-accent) 25%, transparent);
}
.input[disabled] {
  background: var(--interactive-secondary);
  color: var(--text-disabled);
  cursor: not-allowed;
}
.input.has-error {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--danger) 20%, transparent);
}
.field-help { font-size: 12px; color: var(--text-tertiary); }
.field-help.is-error { color: var(--danger); }

/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--elevation-2);
}
[data-theme="light"] .card {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--elevation-1);
}
.card-stat .stat-value {
  font-family: var(--font-en);
  font-size: 48px;
  line-height: 1;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.card-stat .stat-value .accent { color: var(--text-accent); }
.card-data {
  padding: 0;
  overflow: hidden;
}

/* ============================================================
   Misc
   ============================================================ */
.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  height: 24px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-pill);
  font-size: 12px;
  background: var(--interactive-secondary);
  color: var(--text-primary);
}
.pill .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: currentColor;
}
.pill-success { color: var(--success); background: color-mix(in oklab, var(--success) 15%, transparent); }
.pill-warning { color: var(--warning); background: color-mix(in oklab, var(--warning) 15%, transparent); }
.pill-danger  { color: var(--danger);  background: color-mix(in oklab, var(--danger) 15%, transparent); }
.pill-accent  { color: var(--text-accent); background: color-mix(in oklab, var(--text-accent) 15%, transparent); }