/* ============================================================
   IDEAVAULT — Base Styles
   ============================================================ */

:root, [data-theme="light"] {
  --color-bg:              #f7f6f2;
  --color-surface:         #f9f8f5;
  --color-surface-2:       #fbfbf9;
  --color-surface-offset:  #f0ede8;
  --color-divider:         #dcd9d5;
  --color-border:          #d4d1ca;
  --color-text:            #1a1816;
  --color-text-muted:      #7a7974;
  --color-text-faint:      #bab9b4;
  --color-text-inverse:    #f9f8f4;
  --color-primary:         #e85d2e;
  --color-primary-hover:   #c94720;
  --color-primary-active:  #a83515;
  --color-primary-subtle:  #fdf0eb;
  --color-primary-bg:      #fff3ef;

  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
  --space-4: 1rem;    --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem;    --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem;   --space-20: 5rem;   --space-24: 6rem;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(26,24,22,.07), 0 1px 2px rgba(26,24,22,.05);
  --shadow-md: 0 4px 16px rgba(26,24,22,.09), 0 2px 6px rgba(26,24,22,.06);
  --shadow-lg: 0 16px 40px rgba(26,24,22,.12), 0 6px 16px rgba(26,24,22,.07);

  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body:    'Satoshi', 'Inter', sans-serif;

  --content-default: 1100px;
  --transition: 160ms cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  --color-bg:              #111010;
  --color-surface:         #171614;
  --color-surface-2:       #1d1c1a;
  --color-surface-offset:  #1a1917;
  --color-divider:         #252320;
  --color-border:          #2e2c29;
  --color-text:            #e8e6e3;
  --color-text-muted:      #807e7b;
  --color-text-faint:      #504e4c;
  --color-text-inverse:    #1a1816;
  --color-primary:         #ff7a4e;
  --color-primary-hover:   #ff6030;
  --color-primary-active:  #e84818;
  --color-primary-subtle:  #2a1a13;
  --color-primary-bg:      #1e120b;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.25);
  --shadow-md: 0 4px 16px rgba(0,0,0,.35);
  --shadow-lg: 0 16px 40px rgba(0,0,0,.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:              #111010;
    --color-surface:         #171614;
    --color-surface-2:       #1d1c1a;
    --color-surface-offset:  #1a1917;
    --color-divider:         #252320;
    --color-border:          #2e2c29;
    --color-text:            #e8e6e3;
    --color-text-muted:      #807e7b;
    --color-text-faint:      #504e4c;
    --color-text-inverse:    #1a1816;
    --color-primary:         #ff7a4e;
    --color-primary-hover:   #ff6030;
    --color-primary-active:  #e84818;
    --color-primary-subtle:  #2a1a13;
    --color-primary-bg:      #1e120b;
    --shadow-sm: 0 1px 3px rgba(0,0,0,.25);
    --shadow-md: 0 4px 16px rgba(0,0,0,.35);
    --shadow-lg: 0 16px 40px rgba(0,0,0,.5);
  }
}

/* ── Base Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-16);
}
body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}
img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"], ol[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; font-family: var(--font-display); }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }
button { cursor: pointer; background: none; border: none; }
a, button, [role="button"] {
  transition: color var(--transition), background var(--transition),
              border-color var(--transition), box-shadow var(--transition), opacity var(--transition);
}
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-16));
}

/* ── Header ── */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text);
}
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
}
.nav-link:hover, .nav-link.active { color: var(--color-text); }
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  background: var(--color-surface-offset);
}
.theme-toggle:hover { color: var(--color-text); background: var(--color-divider); }

/* ── Hero ── */
.hero {
  padding-block: clamp(var(--space-16), 10vw, var(--space-24));
  border-bottom: 1px solid var(--color-divider);
  background: radial-gradient(ellipse 80% 60% at 50% -10%, color-mix(in oklab, var(--color-primary) 12%, transparent), transparent 70%);
}
.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-6);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  background: var(--color-primary-bg);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid color-mix(in oklab, var(--color-primary) 25%, transparent);
}
.hero-badge::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
.hero-heading {
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--color-text);
  max-width: 18ch;
}
.hero-heading em {
  font-style: italic;
  color: var(--color-primary);
}
.hero-sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 52ch;
  line-height: 1.65;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
  margin-top: var(--space-2);
}
.meta-pill {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ── Stats bar ── */
.stats-bar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-divider);
}
.stats-inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  padding-block: var(--space-5);
  flex-wrap: wrap;
}
.stat { display: flex; flex-direction: column; gap: 2px; }
.stat-num {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
  line-height: 1;
}
.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--color-divider);
  flex-shrink: 0;
}

/* ── Main ideas section ── */
.main {
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
}
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-8);
  gap: var(--space-4);
  flex-wrap: wrap;
}
.section-title {
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.02em;
}
.filter-row {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.filter-btn {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}
.filter-btn:hover { color: var(--color-text); border-color: var(--color-text-muted); }
.filter-btn.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* ── Idea Cards ── */
.ideas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 380px), 1fr));
  gap: var(--space-6);
}

.idea-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  text-decoration: none;
  color: inherit;
}
.idea-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: color-mix(in oklab, var(--color-primary) 40%, var(--color-border));
}
.idea-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
}
.idea-cat {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  background: var(--color-primary-bg);
  color: var(--color-primary);
  border: 1px solid color-mix(in oklab, var(--color-primary) 20%, transparent);
}
.idea-date {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  white-space: nowrap;
  margin-top: var(--space-1);
}
.idea-number {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-text-faint);
  letter-spacing: 0.05em;
}
.idea-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--color-text);
}
.idea-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}
.idea-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
  margin-top: auto;
}
.idea-market {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.idea-market strong {
  color: var(--color-text);
  font-weight: 600;
}
.idea-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--color-surface-offset);
  color: var(--color-text-muted);
  transition: background var(--transition), color var(--transition);
}
.idea-card:hover .idea-arrow {
  background: var(--color-primary);
  color: #fff;
}

/* ── About section ── */
.about-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
  padding-block: clamp(var(--space-12), 7vw, var(--space-24));
}
.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-10), 6vw, var(--space-20));
  align-items: center;
}
.about-heading {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-5);
}
.about-text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  font-size: var(--text-base);
  line-height: 1.7;
}
.about-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.about-card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  background: var(--color-primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid color-mix(in oklab, var(--color-primary) 20%, transparent);
}
.about-card-content h3 {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-4);
  font-family: var(--font-display);
}
.about-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.about-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.about-list li::before {
  content: '';
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  margin-top: 7px;
  flex-shrink: 0;
}

/* ── Footer ── */
.footer {
  padding-block: var(--space-8);
  border-top: 1px solid var(--color-divider);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
}
.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  max-width: none;
}

/* ── Idea Detail Page ── */
.idea-detail-hero {
  padding-block: clamp(var(--space-12), 7vw, var(--space-20));
  border-bottom: 1px solid var(--color-divider);
  background: radial-gradient(ellipse 70% 50% at 50% -5%, color-mix(in oklab, var(--color-primary) 10%, transparent), transparent 65%);
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb span { color: var(--color-text-faint); }
.detail-meta-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
}
.detail-title {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-5);
}
.detail-tagline {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.6;
  font-style: italic;
  max-width: 55ch;
}
.detail-body {
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
}
.detail-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: clamp(var(--space-10), 5vw, var(--space-16));
  align-items: start;
}
.detail-main {}
.detail-sidebar { display: flex; flex-direction: column; gap: var(--space-5); }

.detail-section { margin-bottom: var(--space-10); }
.detail-section-label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.detail-section-title {
  font-size: var(--text-lg);
  font-weight: 800;
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}
.detail-section p {
  color: var(--color-text-muted);
  line-height: 1.75;
  font-size: var(--text-base);
}

.sidebar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}
.sidebar-card-title {
  font-size: var(--text-sm);
  font-weight: 700;
  font-family: var(--font-display);
  margin-bottom: var(--space-4);
  letter-spacing: -0.01em;
}
.sidebar-stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: var(--space-3);
  border-bottom: 1px solid var(--color-divider);
  font-size: var(--text-sm);
}
.sidebar-stat:last-child { border-bottom: none; }
.sidebar-stat-label { color: var(--color-text-muted); }
.sidebar-stat-value { font-weight: 600; color: var(--color-text); text-align: right; max-width: 60%; }

.risk-tag {
  display: inline-flex;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin: var(--space-1);
}

.stage-badge {
  display: inline-flex;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  background: color-mix(in oklab, var(--color-primary) 15%, var(--color-bg));
  color: var(--color-primary);
  border: 1px solid color-mix(in oklab, var(--color-primary) 25%, transparent);
}

.sources-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.sources-list li a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: underline;
  text-underline-offset: 3px;
  word-break: break-all;
}
.sources-list li a:hover { color: var(--color-primary); }

/* ── Empty state ── */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-20) var(--space-8);
  color: var(--color-text-muted);
}
.empty-state h3 { font-size: var(--text-lg); margin-bottom: var(--space-3); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .about-inner {
    grid-template-columns: 1fr;
  }
  .detail-grid {
    grid-template-columns: 1fr;
  }
  .detail-sidebar {
    order: -1;
  }
  .stats-inner {
    gap: var(--space-5);
  }
}
@media (max-width: 500px) {
  .hero-heading { font-size: clamp(2rem, 8vw, 3.5rem); }
  .section-header { flex-direction: column; align-items: flex-start; }
}