/* ============================================================
   NEXIA MARKETPLACE — DESIGN SYSTEM v2
   Light Mode Default · Dark Mode via prefers-color-scheme
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

/* ── Light Mode (Default) ───────────────────────────────── */
:root {
  /* Brand Colors (unchanged) */
  --brand-50:  #eef2ff;
  --brand-100: #e0e7ff;
  --brand-200: #c7d2fe;
  --brand-300: #a5b4fc;
  --brand-400: #818cf8;
  --brand-500: #6366f1;
  --brand-600: #4f46e5;
  --brand-700: #4338ca;
  --brand-800: #3730a3;
  --brand-900: #312e81;

  --accent-400: #c084fc;
  --accent-500: #a855f7;
  --accent-600: #9333ea;
  --accent-700: #7e22ce;

  --gold-400: #f59e0b;
  --gold-500: #d97706;
  --green-400: #10b981;
  --green-500: #059669;
  --red-400:   #ef4444;
  --red-500:   #dc2626;

  /* ── Light Backgrounds ── */
  --bg-base:    #f8fafc;
  --bg-surface: #f1f5f9;
  --bg-raised:  #e8edf5;
  --bg-overlay: #dde3ef;
  --bg-card:    #ffffff;
  --bg-glass:   rgba(255, 255, 255, 0.85);

  /* ── Light Borders ── */
  --border-subtle:  rgba(15, 23, 42, 0.06);
  --border-default: rgba(15, 23, 42, 0.10);
  --border-strong:  rgba(15, 23, 42, 0.18);
  --border-brand:   rgba(99, 102, 241, 0.30);

  /* ── Light Text ── */
  --text-primary:   #0f172a;
  --text-secondary: #475569;
  --text-tertiary:  #94a3b8;
  --text-muted:     #b8c4d0;
  --text-brand:     #4f46e5;
  --text-accent:    #7c3aed;

  /* ── Light Shadows ── */
  --shadow-xs:   0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-sm:   0 2px 6px  rgba(15, 23, 42, 0.08);
  --shadow-md:   0 4px 16px rgba(15, 23, 42, 0.08);
  --shadow-lg:   0 8px 32px rgba(15, 23, 42, 0.10);
  --shadow-xl:   0 20px 56px rgba(15, 23, 42, 0.12);
  --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.07),
                 0 4px 14px rgba(15, 23, 42, 0.05);
  --shadow-card-hover: 0 8px 32px rgba(15, 23, 42, 0.12),
                       0 0 0 1px rgba(99, 102, 241, 0.18);
  --shadow-brand:    0 4px 20px rgba(99, 102, 241, 0.32);
  --shadow-brand-lg: 0 8px 36px rgba(99, 102, 241, 0.40);
  --shadow-glow:     0 0 48px rgba(99, 102, 241, 0.14);

  /* ── Overlays ── */
  --overlay-backdrop: rgba(248, 250, 252, 0.94);
  --overlay-dim:      rgba(15, 23, 42, 0.40);

  /* ── Hero specifics ── */
  --hero-orb-opacity:  0.08;
  --hero-grid-color:   rgba(15, 23, 42, 0.04);

  /* Gradients */
  --gradient-brand:      linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --gradient-brand-soft: linear-gradient(135deg, rgba(99,102,241,0.08) 0%, rgba(168,85,247,0.06) 100%);
  --gradient-card:       linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
  --gradient-glow:       radial-gradient(ellipse at 50% 0%, rgba(99,102,241,0.12) 0%, transparent 70%);
  --gradient-hero:       radial-gradient(ellipse at 60% 40%, rgba(99,102,241,0.10) 0%, rgba(168,85,247,0.06) 40%, transparent 70%);
}

/* ── Dark Mode Override ─────────────────────────────────── */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-base:    #070b14;
    --bg-surface: #0d1424;
    --bg-raised:  #111827;
    --bg-overlay: #161f35;
    --bg-card:    #111927;
    --bg-glass:   rgba(17, 25, 39, 0.78);

    --border-subtle:  rgba(255, 255, 255, 0.06);
    --border-default: rgba(255, 255, 255, 0.10);
    --border-strong:  rgba(255, 255, 255, 0.18);
    --border-brand:   rgba(99, 102, 241, 0.40);

    --text-primary:   #f0f4ff;
    --text-secondary: #94a3b8;
    --text-tertiary:  #64748b;
    --text-muted:     #475569;
    --text-brand:     #818cf8;
    --text-accent:    #c084fc;

    --shadow-xs:   0 1px 2px rgba(0,0,0,0.40);
    --shadow-sm:   0 2px 8px  rgba(0,0,0,0.50);
    --shadow-md:   0 4px 20px rgba(0,0,0,0.60);
    --shadow-lg:   0 8px 40px rgba(0,0,0,0.70);
    --shadow-xl:   0 20px 60px rgba(0,0,0,0.80);
    --shadow-card: 0 4px 24px rgba(0,0,0,0.50),
                   0 1px 4px  rgba(0,0,0,0.30);
    --shadow-card-hover: 0 12px 40px rgba(0,0,0,0.60),
                         0 0 0 1px rgba(99,102,241,0.22);
    --shadow-brand:    0 8px 32px rgba(99,102,241,0.30);
    --shadow-brand-lg: 0 16px 48px rgba(99,102,241,0.40);
    --shadow-glow:     0 0 48px rgba(99,102,241,0.22);

    --overlay-backdrop: rgba(7, 11, 20, 0.92);
    --overlay-dim:      rgba(7, 11, 20, 0.70);

    --hero-orb-opacity:  0.22;
    --hero-grid-color:   rgba(255, 255, 255, 0.025);

    --gradient-brand-soft: linear-gradient(135deg, rgba(99,102,241,0.15) 0%, rgba(168,85,247,0.12) 100%);
    --gradient-card:       linear-gradient(145deg, #111927 0%, #0d1424 100%);
    --gradient-glow:       radial-gradient(ellipse at 50% 0%, rgba(99,102,241,0.20) 0%, transparent 70%);
    --gradient-hero:       radial-gradient(ellipse at 60% 40%, rgba(99,102,241,0.18) 0%, rgba(168,85,247,0.08) 40%, transparent 70%);
  }
}

/* ── Spacing ────────────────────────────────────────────── */
:root {
  --space-1: 4px;  --space-2: 8px;   --space-3: 12px; --space-4: 16px;
  --space-5: 20px; --space-6: 24px;  --space-7: 28px; --space-8: 32px;
  --space-10: 40px;--space-12: 48px; --space-14: 56px;--space-16: 64px;
  --space-20: 80px;--space-24: 96px; --space-32: 128px;

  --radius-xs: 4px;  --radius-sm: 8px;   --radius-md: 12px;
  --radius-lg: 16px; --radius-xl: 20px;  --radius-2xl: 24px;
  --radius-3xl: 32px;--radius-full: 9999px;

  --font-sans:    'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Plus Jakarta Sans', 'Inter', sans-serif;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;
  --text-7xl:  4.5rem;

  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:     cubic-bezier(0.4, 0, 1, 1);
  --ease-inout:  cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast:  150ms;
  --duration-base:  250ms;
  --duration-slow:  400ms;
  --duration-enter: 600ms;

  --z-below:    -1;
  --z-base:      0;
  --z-raised:   10;
  --z-dropdown: 100;
  --z-sticky:   200;
  --z-overlay:  300;
  --z-modal:    400;
  --z-toast:    500;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--duration-base), color var(--duration-base);
}

img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }
ul, ol { list-style: none; }
svg { display: block; }

/* ── Scrollbar ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-surface); }
::-webkit-scrollbar-thumb { background: var(--bg-raised); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--bg-overlay); }

/* ── Container ──────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.container--narrow { max-width: 900px; }
.container--wide   { max-width: 1440px; }

/* ── SVG Icon System ────────────────────────────────────── */
.icon {
  display: inline-block;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: middle;
}
.icon-xs  { width: 12px; height: 12px; }
.icon-sm  { width: 14px; height: 14px; }
.icon-md  { width: 18px; height: 18px; }
.icon-base{ width: 20px; height: 20px; }
.icon-lg  { width: 22px; height: 22px; }
.icon-xl  { width: 26px; height: 26px; }
.icon-2xl { width: 32px; height: 32px; }

/* ── Typography ─────────────────────────────────────────── */
.display-xl {
  font-family: var(--font-display);
  font-size: clamp(var(--text-4xl), 6vw, var(--text-7xl));
  font-weight: 800; line-height: 1.05; letter-spacing: -0.03em;
}
.display-lg {
  font-family: var(--font-display);
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  font-weight: 800; line-height: 1.1; letter-spacing: -0.025em;
}
.display-md {
  font-family: var(--font-display);
  font-size: clamp(var(--text-2xl), 3vw, var(--text-4xl));
  font-weight: 700; line-height: 1.15; letter-spacing: -0.02em;
}
.heading-lg {
  font-family: var(--font-display);
  font-size: clamp(var(--text-xl), 2.5vw, var(--text-3xl));
  font-weight: 700; line-height: 1.2; letter-spacing: -0.015em;
}
.heading-md {
  font-family: var(--font-display);
  font-size: clamp(var(--text-lg), 2vw, var(--text-2xl));
  font-weight: 600; line-height: 1.3; letter-spacing: -0.01em;
}
.body-lg   { font-size: var(--text-lg);  line-height: 1.7; }
.body-base { font-size: var(--text-base);line-height: 1.6; }
.body-sm   { font-size: var(--text-sm);  line-height: 1.5; }
.caption   { font-size: var(--text-xs);  line-height: 1.4; }

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

/* ── Flex Utilities ─────────────────────────────────────── */
.flex         { display: flex; }
.flex-col     { flex-direction: column; }
.flex-center  { align-items: center; justify-content: center; }
.flex-between { align-items: center; justify-content: space-between; }
.items-center { align-items: center; }
.flex-wrap    { flex-wrap: wrap; }
.gap-1 { gap: var(--space-1); } .gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); } .gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); } .gap-8 { gap: var(--space-8); }

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  transition:
    transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out),
    background var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out);
  white-space: nowrap;
  user-select: none;
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--duration-fast) var(--ease-out);
  border-radius: inherit;
  pointer-events: none;
}
.btn:hover::after { background: rgba(255,255,255,0.08); }
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: var(--shadow-brand);
}
.btn-primary:hover { box-shadow: var(--shadow-brand-lg); transform: translateY(-1px); }

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-default);
  box-shadow: var(--shadow-xs);
}
.btn-secondary:hover {
  background: var(--bg-surface);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}

.btn-ghost  { color: var(--text-secondary); }
.btn-ghost:hover { color: var(--text-primary); }

.btn-outline {
  background: transparent;
  color: var(--text-brand);
  border: 1px solid var(--border-brand);
}
.btn-outline:hover {
  background: rgba(99,102,241,0.08);
  border-color: var(--brand-500);
}

.btn-sm { padding: 8px 16px;  font-size: var(--text-xs); }
.btn-lg { padding: 16px 32px; font-size: var(--text-base); }
.btn-xl { padding: 18px 40px; font-size: var(--text-lg); }
.btn-icon { padding: 10px; aspect-ratio: 1; border-radius: var(--radius-md); }

/* ── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition:
    transform var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out);
  box-shadow: var(--shadow-card);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--border-brand);
}

/* ── Badges ─────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.badge-brand  { background: rgba(99,102,241,0.10); color: var(--brand-600); border: 1px solid rgba(99,102,241,0.20); }
.badge-accent { background: rgba(168,85,247,0.10); color: var(--accent-700); border: 1px solid rgba(168,85,247,0.20); }
.badge-gold   { background: rgba(245,158,11,0.10); color: var(--gold-500);  border: 1px solid rgba(245,158,11,0.20); }
.badge-green  { background: rgba(16,185,129,0.10);  color: var(--green-500); border: 1px solid rgba(16,185,129,0.20); }
.badge-gray   { background: rgba(100,116,139,0.10); color: var(--text-secondary); border: 1px solid var(--border-default); }

@media (prefers-color-scheme: dark) {
  .badge-brand  { color: var(--brand-300); border-color: rgba(99,102,241,0.25); }
  .badge-accent { color: var(--accent-400); border-color: rgba(168,85,247,0.25); }
  .badge-gold   { color: var(--gold-400);  border-color: rgba(245,158,11,0.25); }
  .badge-green  { color: #34d399; border-color: rgba(16,185,129,0.25); }
}

/* ── Form Elements ──────────────────────────────────────── */
.input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: var(--text-sm);
  padding: 12px 16px;
  outline: none;
  transition:
    border-color var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
}
.input::placeholder { color: var(--text-tertiary); }
.input:focus {
  border-color: var(--brand-500);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}

/* ── Section Labels ─────────────────────────────────────── */
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-brand);
  margin-bottom: var(--space-4);
}
.section-eyebrow::before {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: 2px;
  flex-shrink: 0;
}

/* ── Pill nav ───────────────────────────────────────────── */
.pill-nav { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.pill {
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  transition: all var(--duration-base) var(--ease-out);
  cursor: pointer;
  box-shadow: var(--shadow-xs);
}
.pill:hover { color: var(--text-primary); border-color: var(--border-default); background: var(--bg-surface); }
.pill.active {
  background: var(--gradient-brand);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-brand);
}

/* ── Stars ──────────────────────────────────────────────── */
.stars { display: inline-flex; gap: 2px; color: var(--gold-400); font-size: var(--text-sm); }

/* ── Skeleton loading ───────────────────────────────────── */
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position:  200% 0; }
}
.skeleton {
  background: linear-gradient(90deg,
    var(--bg-surface) 25%,
    var(--bg-raised) 50%,
    var(--bg-surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

/* ── Glassmorphism ──────────────────────────────────────── */
.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--border-subtle);
}

/* ── Animations ─────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.94); }
  to   { opacity: 1; transform: scale(1); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}
@keyframes gradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@keyframes pulse-brand {
  0%, 100% { box-shadow: 0 0 0 0 rgba(99,102,241,0.35); }
  50%       { box-shadow: 0 0 0 10px rgba(99,102,241,0); }
}

.animate-fadeUp  { animation: fadeUp  var(--duration-enter) var(--ease-out) both; }
.animate-fadeIn  { animation: fadeIn  var(--duration-enter) var(--ease-out) both; }
.animate-scaleIn { animation: scaleIn var(--duration-enter) var(--ease-out) both; }
.animate-float   { animation: float 4s var(--ease-inout) infinite; }

.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }
.delay-500 { animation-delay: 500ms; }
.delay-600 { animation-delay: 600ms; }

/* ── Reveal on scroll ───────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.65s var(--ease-out),
    transform 0.65s var(--ease-out);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.10s; }
.reveal-delay-2 { transition-delay: 0.18s; }
.reveal-delay-3 { transition-delay: 0.26s; }
.reveal-delay-4 { transition-delay: 0.34s; }
.reveal-delay-5 { transition-delay: 0.42s; }

/* ── Tooltip ────────────────────────────────────────────── */
[data-tooltip] { position: relative; }
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) scale(0.9);
  background: var(--bg-raised);
  color: var(--text-primary);
  font-size: var(--text-xs);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  border: 1px solid var(--border-default);
  box-shadow: var(--shadow-md);
  transition: all var(--duration-fast) var(--ease-out);
  z-index: var(--z-dropdown);
}
[data-tooltip]:hover::after { opacity: 1; transform: translateX(-50%) scale(1); }

/* ── Grid System ────────────────────────────────────────── */
.grid { display: grid; gap: var(--space-6); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* ── Section separator ──────────────────────────────────── */
.section-separator {
  height: 1px;
  background: linear-gradient(to right,
    transparent,
    rgba(99,102,241,0.20),
    rgba(168,85,247,0.12),
    transparent);
}

/* ── Focus visible ──────────────────────────────────────── */
:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(99,102,241,0.25);
}

/* ── Responsive Breakpoints ─────────────────────────────── */
@media (max-width: 1024px) {
  .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-cols-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .grid-cols-4, .grid-cols-3, .grid-cols-2 { grid-template-columns: 1fr; }
  .container { padding-inline: var(--space-4); }
}
@media (max-width: 480px) {
  .container { padding-inline: var(--space-4); }
  /* Ensure grids don't overflow on tiny screens */
  .grid-cols-4 > *, .grid-cols-3 > *, .grid-cols-2 > * {
    min-width: 0;
  }
}


/* Visually hidden utility */
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }