/* ═════════════════════════════════════════════════════════════════════
   FAMILY DESIGN TOKENS + COMPONENT LIBRARY
   Source of truth for the Perpetuals · Barriers · UpSideOnly family.

   Layers (top → bottom):
     1. STRUCTURAL TOKENS (:root)       — radius, spacing, sizing, type, shadow scales.
     2. BRAND TOKENS ([data-brand])     — colors + per-brand MOTION vocabulary.
     3. KEYFRAMES (per-brand + shared)  — entry/exit/feedback animations.
     4. FAMILY PRIMITIVES (.fam-*)      — components consuming tokens.
     5. PER-BRAND OVERRIDES             — gameified gloss/ripple, minimal opacity,
                                           warm glow — applied on top of primitives.

   Locked decisions (2026-04-30):
     • Radius: 7-step (4/6/8/10/12/14/16)
     • Spacing: 8-step (2/4/8/12/16/20/24/32)
     • Primary CTA: 48h × 12r × 14/16 padding
     • Card radius: 16px primary, 12px secondary
     • Font: Space Grotesk + Inter fallback; Space Mono for numerics
     • Per-brand personality:
         UpSideOnly = gameified (springy lift, gloss, ripple, glow)
         Barriers   = professional (opacity-only, instant, no transforms)
         Perpetuals = warm (subtle lift + warm orange glow)
   ═════════════════════════════════════════════════════════════════════ */


/* ╔═══════════════════════════════════════════════════════════════════╗
   ║ 1. STRUCTURAL TOKENS                                              ║
   ╚═══════════════════════════════════════════════════════════════════╝ */
:root {
  /* ─── Radius (7 steps) ───────────────────────────────────────── */
  --radius-xs:   4px;
  --radius-sm:   6px;
  --radius-md:   8px;
  --radius-lg:  10px;
  --radius-lg2: 12px;
  --radius-lg3: 14px;
  --radius-xl:  16px;
  --radius-pill: 9999px;

  /* ─── Spacing (8 steps) ──────────────────────────────────────── */
  --space-xxs:  2px;
  --space-xs:   4px;
  --space-sm:   8px;
  --space-md:  12px;
  --space-lg:  16px;
  --space-xl:  20px;
  --space-2xl: 24px;
  --space-3xl: 32px;

  /* ─── Control sizing ─────────────────────────────────────────── */
  --control-h-xs: 24px;
  --control-h-sm: 32px;
  --control-h-md: 38px;
  --control-h-lg: 42px;
  --control-h-xl: 48px;

  --btn-pad-sm: 4px 12px;
  --btn-pad-md: 6px 12px;
  --btn-pad-lg: 10px 16px;
  --btn-pad-xl: 14px 16px;

  --input-h: 48px;
  --input-pad-x: 16px;
  --input-pad-x-suffix: 44px;

  --switch-w: 44px;
  --switch-h: 24px;
  --switch-thumb: 18px;

  /* ─── Layout ─────────────────────────────────────────────────── */
  --container-max:  1200px;
  --container-pad:  24px;
  --header-h:       60px;
  --modal-w-sm:    400px;
  --modal-w-md:    560px;
  --modal-w-lg:    720px;

  /* ─── Typography ─────────────────────────────────────────────── */
  --font-sans:
    "Space Grotesk", "Inter", system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, sans-serif;
  --font-mono:
    "Space Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --text-xxs:   10px;
  --text-xxs2:  11px;
  --text-xs:    12px;
  --text-sm:    14px;
  --text-md:    16px;
  --text-lg:    18px;
  --text-xl:    20px;
  --text-2xl:   24px;
  --text-display-sm: 30px;
  --text-3xl:   32px;

  --weight-normal:    400;
  --weight-medium:    500;
  --weight-semibold:  600;
  --weight-bold:      700;

  --lh-tight:  1.2;
  --lh-base:   1.5;
  --lh-loose:  1.65;

  --tracking-tight: -0.02em;
  --tracking-wide:   0.06em;

  /* ─── Borders ────────────────────────────────────────────────── */
  --border-thin:    1px;
  --border-medium:  1.5px;
  --border-focus:   2px;

  /* ─── Shadows (brand-neutral scale) ──────────────────────────── */
  --shadow-xs: 0 1px 2px 0 rgba(10, 13, 18, 0.05);
  --shadow-sm: 0 1px 2px -1px rgba(10, 13, 18, 0.10), 0 1px 3px 0 rgba(10, 13, 18, 0.10);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.10);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.45);

  /* ─── Motion (shared eases + durations) ──────────────────────── */
  --dur-instant:  60ms;
  --dur-fast:    120ms;
  --dur-normal:  150ms;
  --dur-slow:    220ms;
  --dur-slower:  320ms;

  --ease-out:     cubic-bezier(0.16, 1, 0.30, 1);
  --ease-in:      cubic-bezier(0.40, 0, 1, 1);
  --ease-in-out:  cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring:  cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-spring-soft: cubic-bezier(0.30, 1.30, 0.40, 1);

  /* legacy aliases (back-compat with v1) */
  --transition-fast:   var(--dur-fast) ease;
  --transition-normal: var(--dur-normal) ease;
  --transition-slow:   var(--dur-slow) ease;

  /* ─── Breakpoints ────────────────────────────────────────────── */
  --bp-sm:  480px;
  --bp-md:  768px;
  --bp-lg: 1024px;
}


/* ╔═══════════════════════════════════════════════════════════════════╗
   ║ 2. BRAND TOKENS — color + motion vocabulary                       ║
   ║                                                                   ║
   ║ Each brand defines:                                               ║
   ║   --brand-* / --bg-* / --surface-* / --text-*  (colors)           ║
   ║   --motion-* (per-component motion presets, consumed by .fam-*)   ║
   ║   --hover-shadow / --press-shadow (interaction recipes)           ║
   ╚═══════════════════════════════════════════════════════════════════╝ */

/* ───────────────────────────────────────────────────────────────────
   BRAND: PERPETUALS — warm orange on white, subtle lift + glow
   ─────────────────────────────────────────────────────────────────── */
[data-brand="perpetuals"] {
  --brand-name:           "Perpetuals";

  --brand-primary:        #f97316;
  --brand-primary-hover:  #ea6910;
  --brand-primary-active: #d95f05;
  --brand-primary-text:   #ffffff;
  --brand-primary-faint:  rgba(249, 115, 22, 0.10);
  --brand-primary-dim:    rgba(249, 115, 22, 0.18);

  --bg:               #ffffff;
  --bg-2:             #f9fafb;
  --bg-3:             #f3f4f6;
  --surface:          #ffffff;
  --surface-2:        #f3f4f6;
  --backdrop:         rgba(0, 0, 0, 0.45);

  --border:           #e5e7eb;
  --border-strong:    #d1d5db;
  --border-focus-ring: rgba(249, 115, 22, 0.18);

  --text:             #111827;
  --text-2:           #374151;
  --muted:            #6b7280;
  --subtle:           #9ca3af;

  --success:          #16a34a;
  --warning:          #d97706;
  --danger:           #dc2626;
  --info:             #2563eb;

  --shadow-card:      var(--shadow-md);
  --shadow-elevated:  var(--shadow-lg);

  /* ── Motion: smooth lift + warm glow ─────────────────────────── */
  --motion-btn-transition: transform var(--dur-slow) var(--ease-out),
                           box-shadow var(--dur-slow) var(--ease-out),
                           background var(--dur-slow) var(--ease-out),
                           border-color var(--dur-slow) var(--ease-out);
  --motion-btn-hover-lift:  translateY(-2px);
  --motion-btn-hover-scale: 1.0;
  --motion-btn-press-lift:  translateY(1px);
  --motion-btn-press-scale: 0.985;

  --motion-card-transition: transform var(--dur-slow) var(--ease-out),
                            box-shadow var(--dur-slow) var(--ease-out),
                            border-color var(--dur-slow) var(--ease-out);
  --motion-card-hover-lift: translateY(-2px);

  --motion-tab-transition:  background var(--dur-slow) var(--ease-out),
                            color var(--dur-slow) var(--ease-out);
  --motion-modal-enter:     perp-rise-in   var(--dur-slow) var(--ease-out) both;
  --motion-modal-exit:      perp-fade-out  var(--dur-fast) ease both;
  --motion-toast-enter:     perp-toast-in  var(--dur-slow) var(--ease-out) both;

  --motion-input-focus-ring: 0 0 0 3px var(--border-focus-ring);

  --hover-shadow-primary:
    0 4px 14px rgba(249, 115, 22, 0.38),
    0 1px 3px  rgba(0, 0, 0, 0.12);
  --press-shadow-primary:
    0 1px 4px  rgba(249, 115, 22, 0.22);
  --hover-shadow-card: var(--shadow-lg);
}

/* ───────────────────────────────────────────────────────────────────
   BRAND: BARRIERS — Bloomberg-minimal, professional, instant feedback
   ─────────────────────────────────────────────────────────────────── */
[data-brand="barriers"] {
  --brand-name:           "Barriers";

  --brand-primary:        #088ab2;
  --brand-primary-hover:  #0779a0;
  --brand-primary-active: #066a8c;
  --brand-primary-text:   #ffffff;
  --brand-primary-faint:  rgba(8, 138, 178, 0.10);
  --brand-primary-dim:    rgba(8, 138, 178, 0.18);

  --brand-accent:         #fc8800;
  --brand-accent-hover:   #e07a00;

  --bg:               #0c0e12;
  --bg-2:             #13161b;
  --bg-3:             #181c23;
  --surface:          #1c2028;
  --surface-2:        #22262f;
  --backdrop:         rgba(34, 38, 47, 0.70);

  --border:           #22262f;
  --border-strong:    #373a41;
  --border-focus-ring: rgba(34, 204, 238, 0.30);

  --text:             #f7f7f7;
  --text-2:           #cecfd2;
  --muted:            #94979c;
  --subtle:           #717680;

  --success:          #17b26a;
  --warning:          #f59e0b;
  --danger:           #f04438;
  --info:             #22ccee;

  --shadow-card:
    inset 0 1px 0 0 rgba(255, 255, 255, 0.04),
    0 12px 32px 0 rgba(0, 0, 0, 0.45),
    0 0 0 1px rgba(8, 138, 178, 0.06);
  --shadow-elevated:  var(--shadow-xl);

  /* ── Motion: instant, no transform, opacity-only press ───────── */
  --motion-btn-transition: background var(--dur-fast) ease,
                           color var(--dur-fast) ease,
                           border-color var(--dur-fast) ease,
                           opacity var(--dur-fast) ease;
  --motion-btn-hover-lift:  none;
  --motion-btn-hover-scale: 1.0;
  --motion-btn-press-lift:  none;
  --motion-btn-press-scale: 1.0;

  --motion-card-transition: border-color var(--dur-fast) ease,
                            background  var(--dur-fast) ease;
  --motion-card-hover-lift: none;

  --motion-tab-transition:  background var(--dur-instant) ease,
                            color var(--dur-instant) ease;
  --motion-modal-enter:     barr-fade-in  var(--dur-fast) ease both;
  --motion-modal-exit:      barr-fade-out var(--dur-instant) ease both;
  --motion-toast-enter:     barr-slide-in var(--dur-fast) ease both;

  --motion-input-focus-ring: 0 0 0 2px var(--border-focus-ring);

  --hover-shadow-primary:   none;        /* color shift only */
  --press-shadow-primary:   none;
  --hover-shadow-card:      var(--shadow-card); /* unchanged on hover */
}

/* ───────────────────────────────────────────────────────────────────
   BRAND: UPSIDEONLY — gameified, springy, glossy, glowing
   ─────────────────────────────────────────────────────────────────── */
[data-brand="upsideonly"] {
  --brand-name:           "UpSideOnly";

  --brand-primary:        #22c55e;
  --brand-primary-hover:  #28d96a;
  --brand-primary-active: #19a84e;
  --brand-primary-text:   #171717;
  --brand-primary-faint:  rgba(34, 197, 94, 0.10);
  --brand-primary-dim:    rgba(34, 197, 94, 0.20);

  --bg:               #141414;
  --bg-2:             #1a1a1a;
  --bg-3:             #202020;
  --surface:          #202020;
  --surface-2:        #2a2a2a;
  --backdrop:         rgba(0, 0, 0, 0.65);

  --border:           rgba(34, 197, 94, 0.12);
  --border-strong:    rgba(34, 197, 94, 0.30);
  --border-focus-ring: rgba(34, 197, 94, 0.28);

  --text:             #f5f5f5;
  --text-2:           #d1d5db;
  --muted:            #999999;
  --subtle:           #666666;

  --success:          #22c55e;
  --warning:          #f59e0b;
  --danger:           #f87171;
  --info:             #60a5fa;

  --glass-bg:         rgba(13, 13, 13, 0.70);
  --glass-border:     rgba(255, 255, 255, 0.08);

  --shadow-card:      0 4px 24px rgba(0, 0, 0, 0.50);
  --shadow-elevated:  0 12px 48px rgba(0, 0, 0, 0.65);

  /* ── Motion: springy lift + glow + gloss + ripple ────────────── */
  --motion-btn-transition: transform var(--dur-slow) var(--ease-spring),
                           box-shadow var(--dur-slow) var(--ease-out),
                           background var(--dur-fast) ease,
                           border-color var(--dur-fast) ease;
  --motion-btn-hover-lift:  translateY(-3px);
  --motion-btn-hover-scale: 1.045;
  --motion-btn-press-lift:  translateY(1px);
  --motion-btn-press-scale: 0.965;

  --motion-card-transition: transform var(--dur-slow) var(--ease-spring),
                            box-shadow var(--dur-slow) var(--ease-out),
                            border-color var(--dur-fast) ease;
  --motion-card-hover-lift: translateY(-2px);

  --motion-tab-transition:  background var(--dur-slow) var(--ease-spring),
                            color var(--dur-slow) var(--ease-spring),
                            transform var(--dur-slow) var(--ease-spring);
  --motion-modal-enter:     uso-spring-in  var(--dur-slower) var(--ease-spring) both;
  --motion-modal-exit:      uso-zoom-out   var(--dur-fast) ease both;
  --motion-toast-enter:     uso-bounce-in  var(--dur-slow) var(--ease-spring) both;

  --motion-input-focus-ring:
    0 0 0 3px var(--border-focus-ring),
    0 0 18px rgba(34, 197, 94, 0.20);

  --hover-shadow-primary:
    0 0 0 2px rgba(34, 197, 94, 0.28),
    0 10px 28px rgba(34, 197, 94, 0.50),
    0 3px 10px rgba(0, 0, 0, 0.35);
  --press-shadow-primary:
    0 0 0 3px rgba(34, 197, 94, 0.55),
    0 2px 8px rgba(34, 197, 94, 0.35);
  --hover-shadow-card:
    0 6px 32px rgba(34, 197, 94, 0.18),
    0 4px 16px rgba(0, 0, 0, 0.45);
}


/* ╔═══════════════════════════════════════════════════════════════════╗
   ║ 3. KEYFRAMES                                                      ║
   ╚═══════════════════════════════════════════════════════════════════╝ */

/* ── Perpetuals: rise-in + smooth fade ───────────────────────────── */
@keyframes perp-rise-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes perp-fade-out {
  from { opacity: 1; }
  to   { opacity: 0; transform: translateY(2px); }
}
@keyframes perp-toast-in {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Barriers: minimal fade + clean slide ────────────────────────── */
@keyframes barr-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes barr-fade-out {
  from { opacity: 1; }
  to   { opacity: 0; }
}
@keyframes barr-slide-in {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── UpSideOnly: spring, bounce, ripple, glow pulse ──────────────── */
@keyframes uso-spring-in {
  0%   { opacity: 0; transform: scale(0.85) translateY(12px); }
  60%  { opacity: 1; transform: scale(1.04) translateY(-2px); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}
@keyframes uso-zoom-out {
  from { opacity: 1; transform: scale(1); }
  to   { opacity: 0; transform: scale(0.92); }
}
@keyframes uso-bounce-in {
  0%   { opacity: 0; transform: translateY(-20px) scale(0.9); }
  50%  { opacity: 1; transform: translateY(4px)   scale(1.04); }
  100% { opacity: 1; transform: translateY(0)     scale(1); }
}
@keyframes uso-ripple {
  0%   { transform: scale(0);  opacity: 0.45; }
  100% { transform: scale(4);  opacity: 0; }
}
@keyframes uso-glow-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.45); }
  50%      { box-shadow: 0 0 0 12px rgba(34, 197, 94, 0); }
}
@keyframes uso-shimmer {
  from { background-position: -200% 0; }
  to   { background-position:  200% 0; }
}

/* ── Shared utilities ────────────────────────────────────────────── */
@keyframes fam-spin {
  to { transform: rotate(360deg); }
}
@keyframes fam-skeleton-pulse {
  0%, 100% { opacity: 0.5; }
  50%      { opacity: 0.85; }
}
@keyframes fam-progress-stripes {
  from { background-position: 0 0; }
  to   { background-position: 32px 0; }
}


/* ╔═══════════════════════════════════════════════════════════════════╗
   ║ 4. FAMILY PRIMITIVES                                              ║
   ║ Apply inside any [data-brand] scope — they consume brand tokens.  ║
   ╚═══════════════════════════════════════════════════════════════════╝ */

[data-brand] {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  line-height: var(--lh-base);
}

/* ─── Button ─────────────────────────────────────────────────────── */
.fam-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-sans);
  font-weight: var(--weight-semibold);
  border: var(--border-thin) solid transparent;
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  transition: var(--motion-btn-transition);
  user-select: none;
  overflow: hidden;        /* ripple containment */
}
.fam-btn:focus-visible {
  outline: var(--border-focus) solid var(--brand-primary);
  outline-offset: 2px;
}
.fam-btn:disabled { opacity: 0.42; cursor: not-allowed; }

.fam-btn--sm { height: var(--control-h-sm); padding: var(--btn-pad-sm); border-radius: var(--radius-lg);  font-size: var(--text-xs); }
.fam-btn--md { height: var(--control-h-md); padding: var(--btn-pad-md); border-radius: var(--radius-lg2); font-size: var(--text-sm); }
.fam-btn--lg { height: var(--control-h-lg); padding: var(--btn-pad-lg); border-radius: var(--radius-lg2); font-size: var(--text-sm); }
.fam-btn--xl { height: var(--control-h-xl); padding: var(--btn-pad-xl); border-radius: var(--radius-lg2); font-size: var(--text-sm); }

.fam-btn--icon {
  width: var(--control-h-md);
  height: var(--control-h-md);
  padding: 0;
  border-radius: var(--radius-pill);
}

.fam-btn--primary {
  background: var(--brand-primary);
  color: var(--brand-primary-text);
}
.fam-btn--primary:hover {
  background: var(--brand-primary-hover);
  transform: var(--motion-btn-hover-lift) scale(var(--motion-btn-hover-scale));
  box-shadow: var(--hover-shadow-primary);
}
.fam-btn--primary:active {
  background: var(--brand-primary-active);
  transform: var(--motion-btn-press-lift) scale(var(--motion-btn-press-scale));
  box-shadow: var(--press-shadow-primary);
}

.fam-btn--secondary {
  background: var(--surface-2);
  color: var(--text);
  border-color: var(--border-strong);
}
.fam-btn--secondary:hover {
  background: var(--bg-3);
  transform: var(--motion-btn-hover-lift) scale(var(--motion-btn-hover-scale));
}

.fam-btn--ghost {
  background: transparent;
  color: var(--text-2);
  border-color: var(--border);
}
.fam-btn--ghost:hover {
  background: var(--surface-2);
  color: var(--text);
}

.fam-btn--danger {
  background: var(--danger);
  color: #ffffff;
}
.fam-btn--danger:hover {
  filter: brightness(1.06);
  transform: var(--motion-btn-hover-lift) scale(var(--motion-btn-hover-scale));
}

/* ─── Input + Textarea ───────────────────────────────────────────── */
.fam-input,
.fam-textarea {
  display: block;
  width: 100%;
  padding: 0 var(--input-pad-x);
  background: var(--surface);
  color: var(--text);
  border: var(--border-thin) solid var(--border-strong);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  outline: none;
  transition: border-color var(--dur-normal) ease, box-shadow var(--dur-normal) ease;
}
.fam-input { height: var(--input-h); }
.fam-textarea {
  min-height: 96px;
  padding: var(--space-md) var(--input-pad-x);
  resize: vertical;
  line-height: var(--lh-base);
}
.fam-input::placeholder,
.fam-textarea::placeholder { color: var(--subtle); }
.fam-input:focus,
.fam-textarea:focus {
  border-color: var(--brand-primary);
  box-shadow: var(--motion-input-focus-ring);
}
.fam-input:disabled,
.fam-textarea:disabled { opacity: 0.5; cursor: not-allowed; }
.fam-input--error,
.fam-textarea--error { border-color: var(--danger); }
.fam-input--error:focus { box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.20); }

.fam-field { display: flex; flex-direction: column; gap: var(--space-xs); }
.fam-label { font-size: var(--text-xs); font-weight: var(--weight-semibold); color: var(--text-2); }
.fam-hint  { font-size: var(--text-xxs2); color: var(--muted); }
.fam-error { font-size: var(--text-xxs2); color: var(--danger); }

/* ─── Select ─────────────────────────────────────────────────────── */
.fam-select {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  width: 100%;
  height: var(--input-h);
  padding: 0 var(--space-md) 0 var(--input-pad-x);
  background: var(--surface);
  color: var(--text);
  border: var(--border-thin) solid var(--border-strong);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: border-color var(--dur-normal) ease, box-shadow var(--dur-normal) ease;
}
.fam-select::after {
  content: '';
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg) translateY(-3px);
}
.fam-select:hover { border-color: var(--brand-primary); }
.fam-select:focus-within {
  border-color: var(--brand-primary);
  box-shadow: var(--motion-input-focus-ring);
}

/* ─── Checkbox ───────────────────────────────────────────────────── */
.fam-check {
  appearance: none;
  width: 20px;
  height: 20px;
  border: var(--border-medium) solid var(--border-strong);
  border-radius: var(--radius-xs);
  background: var(--surface);
  cursor: pointer;
  position: relative;
  transition: background var(--dur-fast) ease, border-color var(--dur-fast) ease, transform var(--dur-fast) var(--ease-spring);
  flex-shrink: 0;
}
.fam-check:checked {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
}
.fam-check:checked::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 1px;
  width: 6px;
  height: 11px;
  border: 2px solid var(--brand-primary-text);
  border-top: 0;
  border-left: 0;
  transform: rotate(45deg);
}

/* ─── Radio ──────────────────────────────────────────────────────── */
.fam-radio {
  appearance: none;
  width: 20px;
  height: 20px;
  border: var(--border-medium) solid var(--border-strong);
  border-radius: var(--radius-pill);
  background: var(--surface);
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
  transition: background var(--dur-fast) ease, border-color var(--dur-fast) ease;
}
.fam-radio:checked { border-color: var(--brand-primary); }
.fam-radio:checked::after {
  content: '';
  position: absolute;
  inset: 4px;
  border-radius: var(--radius-pill);
  background: var(--brand-primary);
}

/* ─── Switch ─────────────────────────────────────────────────────── */
.fam-switch {
  appearance: none;
  position: relative;
  width: var(--switch-w);
  height: var(--switch-h);
  border-radius: var(--radius-pill);
  background: var(--surface-2);
  border: var(--border-thin) solid var(--border-strong);
  cursor: pointer;
  transition: background var(--dur-normal) ease, border-color var(--dur-normal) ease;
  flex-shrink: 0;
}
.fam-switch::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 3px;
  transform: translateY(-50%);
  width: var(--switch-thumb);
  height: var(--switch-thumb);
  border-radius: var(--radius-pill);
  background: var(--text-2);
  transition: left var(--dur-normal) var(--ease-out), background var(--dur-normal) ease;
}
.fam-switch:checked {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
}
.fam-switch:checked::after {
  left: calc(100% - var(--switch-thumb) - 3px);
  background: var(--brand-primary-text);
}

/* ─── Tabs ───────────────────────────────────────────────────────── */
.fam-tablist {
  display: inline-flex;
  gap: var(--space-xs);
  padding: var(--space-xs);
  background: var(--surface-2);
  border-radius: var(--radius-lg2);
}
.fam-tab {
  height: var(--control-h-xs);
  padding: var(--btn-pad-sm);
  background: transparent;
  border: 0;
  border-radius: var(--radius-lg);
  color: var(--muted);
  font: var(--weight-medium) var(--text-xs)/1.25 var(--font-sans);
  cursor: pointer;
  transition: var(--motion-tab-transition);
}
.fam-tab:hover { color: var(--text); }
.fam-tab[aria-selected="true"] {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-xs);
}

/* ─── Card ───────────────────────────────────────────────────────── */
.fam-card {
  background: var(--surface);
  border: var(--border-thin) solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-card);
  transition: var(--motion-card-transition);
}
.fam-card--sm {
  border-radius: var(--radius-lg2);
  padding: var(--space-lg) var(--space-xl);
  box-shadow: var(--shadow-sm);
}
.fam-card--interactive { cursor: pointer; }
.fam-card--interactive:hover {
  border-color: var(--border-strong);
  transform: var(--motion-card-hover-lift);
  box-shadow: var(--hover-shadow-card);
}

/* ─── Badge ──────────────────────────────────────────────────────── */
.fam-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  height: 22px;
  padding: 0 var(--space-md);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
}
.fam-badge--primary  { background: var(--brand-primary-faint);    color: var(--brand-primary); border: var(--border-thin) solid var(--border); }
.fam-badge--success  { background: rgba(34, 197, 94, 0.12);       color: var(--success);       border: var(--border-thin) solid rgba(34, 197, 94, 0.25); }
.fam-badge--warning  { background: rgba(245, 158, 11, 0.12);      color: var(--warning);       border: var(--border-thin) solid rgba(245, 158, 11, 0.25); }
.fam-badge--danger   { background: rgba(239, 68, 68, 0.12);       color: var(--danger);        border: var(--border-thin) solid rgba(239, 68, 68, 0.25); }
.fam-badge--neutral  { background: var(--surface-2);              color: var(--muted);         border: var(--border-thin) solid var(--border); }

/* ─── Avatar ─────────────────────────────────────────────────────── */
.fam-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-pill);
  background: var(--surface-2);
  color: var(--text);
  border: 2px solid var(--border);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  overflow: hidden;
  flex-shrink: 0;
}
.fam-avatar--sm { width: 28px; height: 28px; font-size: var(--text-xxs2); }
.fam-avatar--lg { width: 48px; height: 48px; font-size: var(--text-sm); }
.fam-avatar--primary { background: var(--brand-primary); color: var(--brand-primary-text); border-color: transparent; }

/* ─── Spinner ────────────────────────────────────────────────────── */
.fam-spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid var(--border-strong);
  border-top-color: var(--brand-primary);
  border-radius: var(--radius-pill);
  animation: fam-spin 720ms linear infinite;
}
.fam-spinner--sm { width: 12px; height: 12px; border-width: 1.5px; }
.fam-spinner--lg { width: 28px; height: 28px; border-width: 3px;  }

/* ─── Skeleton ───────────────────────────────────────────────────── */
.fam-skel {
  background: var(--surface-2);
  border-radius: var(--radius-md);
  animation: fam-skeleton-pulse 1.4s ease-in-out infinite;
}
.fam-skel--text { height: 12px; }
.fam-skel--line { height: 16px; }

/* ─── Progress ───────────────────────────────────────────────────── */
.fam-progress {
  width: 100%;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--surface-2);
  overflow: hidden;
}
.fam-progress > .fam-progress-bar {
  height: 100%;
  background: var(--brand-primary);
  border-radius: inherit;
  transition: width var(--dur-slow) var(--ease-out);
}

/* ─── Stat card ──────────────────────────────────────────────────── */
.fam-stat {
  background: var(--surface);
  border: var(--border-thin) solid var(--border);
  border-radius: var(--radius-lg2);
  padding: var(--space-lg) var(--space-xl);
  min-width: 160px;
}
.fam-stat-label {
  font-size: var(--text-xxs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--space-xs);
}
.fam-stat-value {
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  color: var(--text);
  letter-spacing: var(--tracking-tight);
  line-height: 1;
  font-feature-settings: "tnum" 1;
}
.fam-stat-delta {
  font-size: var(--text-xxs2);
  color: var(--success);
  margin-top: var(--space-xs);
  font-weight: var(--weight-semibold);
}
.fam-stat-delta--down { color: var(--danger); }

/* ─── Alert ──────────────────────────────────────────────────────── */
.fam-alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-lg);
  border: var(--border-thin) solid var(--border);
  background: var(--surface);
  font-size: var(--text-sm);
  color: var(--text-2);
}
.fam-alert-dot {
  width: 8px; height: 8px;
  border-radius: var(--radius-pill);
  margin-top: 6px;
  flex-shrink: 0;
}
.fam-alert--info    .fam-alert-dot { background: var(--info); }
.fam-alert--success .fam-alert-dot { background: var(--success); }
.fam-alert--warning .fam-alert-dot { background: var(--warning); }
.fam-alert--danger  .fam-alert-dot { background: var(--danger); }
.fam-alert-title { font-weight: var(--weight-semibold); color: var(--text); margin-bottom: 2px; }

/* ─── Tooltip ────────────────────────────────────────────────────── */
.fam-tooltip-wrap {
  position: relative;
  display: inline-flex;
}
.fam-tooltip {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: 6px 10px;
  background: var(--bg-3);
  color: var(--text);
  border: var(--border-thin) solid var(--border-strong);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--dur-fast) ease, transform var(--dur-fast) var(--ease-out);
  box-shadow: var(--shadow-md);
  z-index: 50;
}
.fam-tooltip-wrap:hover > .fam-tooltip,
.fam-tooltip-wrap:focus-within > .fam-tooltip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ─── Popover ────────────────────────────────────────────────────── */
.fam-popover {
  position: absolute;
  z-index: 60;
  min-width: 220px;
  padding: var(--space-sm);
  background: var(--surface);
  border: var(--border-thin) solid var(--border-strong);
  border-radius: var(--radius-lg2);
  box-shadow: var(--shadow-elevated);
  animation: var(--motion-modal-enter);
}
.fam-popover-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 0;
  background: transparent;
  color: var(--text-2);
  border-radius: var(--radius-md);
  font: var(--weight-medium) var(--text-sm)/1.25 var(--font-sans);
  text-align: left;
  cursor: pointer;
  transition: background var(--dur-fast) ease, color var(--dur-fast) ease;
}
.fam-popover-item:hover { background: var(--surface-2); color: var(--text); }

/* ─── Modal / Dialog ─────────────────────────────────────────────── */
.fam-modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--backdrop);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  animation: barr-fade-in var(--dur-fast) ease both;
}
.fam-modal {
  position: relative;
  width: var(--modal-w-md);
  max-width: calc(100vw - var(--space-2xl) * 2);
  background: var(--surface);
  border: var(--border-thin) solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-elevated);
  animation: var(--motion-modal-enter);
}
.fam-modal--sm { width: var(--modal-w-sm); }
.fam-modal--lg { width: var(--modal-w-lg); }

.fam-modal-header {
  padding: var(--space-xl) var(--space-2xl);
  border-bottom: var(--border-thin) solid var(--border);
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}
.fam-modal-title {
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--text);
  letter-spacing: var(--tracking-tight);
}
.fam-modal-subtitle {
  font-size: var(--text-xs);
  color: var(--muted);
  margin-top: 2px;
}
.fam-modal-close {
  margin-left: auto;
  width: 32px; height: 32px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: background var(--dur-fast) ease, color var(--dur-fast) ease;
}
.fam-modal-close:hover { background: var(--surface-2); color: var(--text); }
.fam-modal-body {
  padding: var(--space-xl) var(--space-2xl);
  color: var(--text-2);
  font-size: var(--text-sm);
  line-height: var(--lh-loose);
}
.fam-modal-footer {
  padding: var(--space-lg) var(--space-2xl);
  border-top: var(--border-thin) solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
}

/* ─── Toast ──────────────────────────────────────────────────────── */
.fam-toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--surface);
  border: var(--border-thin) solid var(--border);
  border-radius: var(--radius-lg2);
  box-shadow: var(--shadow-elevated);
  max-width: 380px;
  min-width: 280px;
  animation: var(--motion-toast-enter);
}
.fam-toast-icon {
  width: 18px; height: 18px;
  border-radius: var(--radius-pill);
  flex-shrink: 0;
  margin-top: 2px;
}
.fam-toast--success .fam-toast-icon { background: var(--success); }
.fam-toast--warning .fam-toast-icon { background: var(--warning); }
.fam-toast--danger  .fam-toast-icon { background: var(--danger);  }
.fam-toast--info    .fam-toast-icon { background: var(--info);    }
.fam-toast-title { font-size: var(--text-sm); font-weight: var(--weight-semibold); color: var(--text); margin-bottom: 2px; }
.fam-toast-body  { font-size: var(--text-xs); color: var(--muted); }

/* ─── Drawer ─────────────────────────────────────────────────────── */
.fam-drawer {
  position: fixed;
  top: 0; right: 0;
  height: 100vh;
  width: 380px;
  max-width: calc(100vw - var(--space-3xl));
  background: var(--surface);
  border-left: var(--border-thin) solid var(--border);
  box-shadow: var(--shadow-elevated);
  z-index: 1001;
}

/* ─── Empty state ────────────────────────────────────────────────── */
.fam-empty {
  padding: var(--space-3xl);
  text-align: center;
  background: var(--surface-2);
  border: var(--border-thin) dashed var(--border-strong);
  border-radius: var(--radius-xl);
  color: var(--muted);
  font-size: var(--text-sm);
}
.fam-empty-title { font-weight: var(--weight-semibold); color: var(--text-2); margin: var(--space-md) 0 var(--space-xs); }

/* ─── Table ──────────────────────────────────────────────────────── */
.fam-table-wrap {
  border: var(--border-thin) solid var(--border);
  border-radius: var(--radius-lg2);
  overflow: hidden;
}
.fam-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.fam-table thead tr { background: var(--surface-2); }
.fam-table th {
  text-align: left;
  padding: var(--space-md) var(--space-lg);
  font-size: var(--text-xxs);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: var(--border-thin) solid var(--border);
}
.fam-table td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: var(--border-thin) solid var(--border);
  color: var(--text-2);
}
.fam-table tbody tr:last-child td { border-bottom: 0; }
.fam-table tbody tr { transition: background var(--dur-fast) ease; }
.fam-table tbody tr:hover { background: var(--surface-2); }
.fam-table .td-mono { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--muted); }

/* ─── Pagination ─────────────────────────────────────────────────── */
.fam-pagination {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}
.fam-page {
  min-width: 32px;
  height: 32px;
  padding: 0 var(--space-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: var(--border-thin) solid var(--border);
  background: var(--surface);
  color: var(--text-2);
  font: var(--weight-medium) var(--text-sm)/1.25 var(--font-sans);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--dur-fast) ease, border-color var(--dur-fast) ease, color var(--dur-fast) ease;
}
.fam-page:hover { background: var(--surface-2); color: var(--text); border-color: var(--border-strong); }
.fam-page[aria-current="page"] {
  background: var(--brand-primary);
  color: var(--brand-primary-text);
  border-color: var(--brand-primary);
}

/* ─── Divider ────────────────────────────────────────────────────── */
.fam-divider {
  height: var(--border-thin);
  background: var(--border);
  border: 0;
  margin: var(--space-2xl) 0;
}


/* ╔═══════════════════════════════════════════════════════════════════╗
   ║ 5. PER-BRAND OVERRIDES                                            ║
   ║ Personality layered on top of family primitives.                  ║
   ╚═══════════════════════════════════════════════════════════════════╝ */

/* ───────────────────────────────────────────────────────────────────
   UPSIDEONLY — gameified: gloss overlay, ripple, springy, glow
   ─────────────────────────────────────────────────────────────────── */
[data-brand="upsideonly"] .fam-btn::before {
  /* gloss highlight that fades in on hover */
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.22) 0%, transparent 55%);
  opacity: 0;
  transition: opacity var(--dur-slow) ease;
  pointer-events: none;
  border-radius: inherit;
}
[data-brand="upsideonly"] .fam-btn:hover::before { opacity: 1; }
[data-brand="upsideonly"] .fam-btn:active::before { opacity: 0.5; }

[data-brand="upsideonly"] .fam-btn--primary {
  background-image: linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 60%);
}

[data-brand="upsideonly"] .fam-tab[aria-selected="true"] {
  box-shadow: var(--shadow-xs), 0 0 0 1px rgba(34, 197, 94, 0.20);
}

[data-brand="upsideonly"] .fam-card--interactive:hover {
  border-color: rgba(34, 197, 94, 0.45);
}

[data-brand="upsideonly"] .fam-modal {
  border-color: rgba(34, 197, 94, 0.18);
  box-shadow:
    0 0 0 1px rgba(34, 197, 94, 0.10),
    0 24px 72px rgba(0, 0, 0, 0.65),
    0 0 64px rgba(34, 197, 94, 0.08);
}

[data-brand="upsideonly"] .fam-toast {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(34, 197, 94, 0.12);
}

/* ripple element (positioned by JS) */
[data-brand="upsideonly"] .fam-ripple {
  position: absolute;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.30);
  transform: scale(0);
  pointer-events: none;
  animation: uso-ripple 520ms ease-out forwards;
}

/* glow-pulse helper (apply to any element to draw attention) */
[data-brand="upsideonly"] .fam-pulse {
  animation: uso-glow-pulse 1.6s ease-in-out infinite;
}

/* shimmer for skeletons — gradient sweep */
[data-brand="upsideonly"] .fam-skel {
  background:
    linear-gradient(
      90deg,
      var(--surface-2) 0%,
      rgba(34, 197, 94, 0.08) 50%,
      var(--surface-2) 100%
    );
  background-size: 200% 100%;
  animation: uso-shimmer 1.6s linear infinite;
}

/* ───────────────────────────────────────────────────────────────────
   BARRIERS — minimal: opacity-only press, no transforms, fast
   ─────────────────────────────────────────────────────────────────── */
[data-brand="barriers"] .fam-btn:active { opacity: 0.82; }
[data-brand="barriers"] .fam-btn--primary:active { opacity: 1; background: var(--brand-primary-active); }

[data-brand="barriers"] .fam-btn--secondary:hover {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
  background: var(--brand-primary-faint);
}

[data-brand="barriers"] .fam-card--interactive:hover {
  border-color: var(--brand-primary);
  background: var(--surface);
}

[data-brand="barriers"] .fam-tab[aria-selected="true"] {
  background: var(--surface);
  box-shadow:
    inset 0 1px 0 0 rgba(255, 255, 255, 0.04),
    0 1px 0 0 rgba(8, 138, 178, 0.20);
}

[data-brand="barriers"] .fam-modal {
  /* Bloomberg-style hairline glow */
  box-shadow:
    inset 0 1px 0 0 rgba(255, 255, 255, 0.04),
    0 24px 72px rgba(0, 0, 0, 0.65),
    0 0 0 1px rgba(8, 138, 178, 0.12);
}

[data-brand="barriers"] .fam-toast {
  box-shadow:
    inset 0 1px 0 0 rgba(255, 255, 255, 0.04),
    0 8px 24px rgba(0, 0, 0, 0.45),
    0 0 0 1px rgba(8, 138, 178, 0.10);
}

/* ───────────────────────────────────────────────────────────────────
   PERPETUALS — warm: subtle lift, warm orange glow on primary
   ─────────────────────────────────────────────────────────────────── */
[data-brand="perpetuals"] .fam-btn--secondary:hover {
  background: var(--bg-3);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}
[data-brand="perpetuals"] .fam-btn--ghost:hover {
  background: var(--bg-2);
  border-color: var(--border-strong);
  color: var(--text);
}

[data-brand="perpetuals"] .fam-card--interactive:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-lg);
}

[data-brand="perpetuals"] .fam-modal {
  box-shadow:
    0 1px 0 0 rgba(255, 255, 255, 0.6) inset,
    0 24px 72px rgba(0, 0, 0, 0.18);
}

[data-brand="perpetuals"] .fam-toast {
  box-shadow:
    0 12px 32px rgba(0, 0, 0, 0.12),
    0 0 0 1px rgba(249, 115, 22, 0.10);
}

/* ─── Reduced-motion: all brands ─────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 1ms !important;
    transition-duration: 1ms !important;
  }
  [data-brand] .fam-btn:hover,
  [data-brand] .fam-card--interactive:hover {
    transform: none !important;
  }
}