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

/* ── CSS Variables — Light mode (default) ── */
:root {
  --bg-primary:     #f5f4f0;
  --bg-secondary:   #ebebea;
  --bg-card:        #ffffff;
  --text-primary:   #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-dim:       #9a9a9a;
  --accent:         #16a34a;
  --accent-dim:     #15803d;
  --accent-alert:   #dc2626;
  --accent-warn:    #d97706;
  --accent-info:    #2563eb;
  --border:         #d1cdc7;
  --border-strong:  #a8a29e;
  --dim-opacity:    0.32;
  --font-mono:      'IBM Plex Mono', 'Courier New', monospace;
  --font-ui:        'IBM Plex Sans', system-ui, sans-serif;
  --row-hover:      #f0efeb;
}

/* ── Dark mode ── */
[data-theme="dark"] {
  --bg-primary:     #0a0a0a;
  --bg-secondary:   #111111;
  --bg-card:        #1a1a1a;
  --text-primary:   #e8e8e8;
  --text-secondary: #a0a0a0;
  --text-dim:       #4a4a4a;
  --accent:         #39ff14;
  --accent-dim:     #2dd10e;
  --accent-alert:   #f87171;
  --accent-warn:    #fbbf24;
  --accent-info:    #60a5fa;
  --border:         #2a2a2a;
  --border-strong:  #3a3a3a;
  --row-hover:      #222222;
}

/* ── Base ── */
html { font-size: 14px; scroll-behavior: smooth; }
body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-ui);
  line-height: 1.5;
  min-height: 100vh;
}

/* ── Layout ── */
.page-wrap { max-width: 1400px; margin: 0 auto; padding: 0 16px; }
.two-col   { display: grid; grid-template-columns: 1fr 280px; gap: 24px; align-items: start; }

/* ── Nav ── */
nav {
  border-bottom: 1px solid var(--border-strong);
  background: var(--bg-primary);
  position: sticky; top: 0; z-index: 100;
}
.nav-inner {
  max-width: 1400px; margin: 0 auto; padding: 0 16px;
  display: flex; align-items: center; justify-content: space-between;
  height: 44px;
}
.nav-brand {
  font-family: var(--font-mono);
  font-size: 15px; font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.5px;
}
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-meta  { font-size: 11px; color: var(--text-dim); font-family: var(--font-mono); }
.dark-toggle {
  font-size: 11px; font-family: var(--font-mono);
  color: var(--text-secondary); cursor: pointer;
  border: 1px solid var(--border); padding: 2px 8px; border-radius: 2px;
  background: none; transition: color 0.15s, border-color 0.15s;
  white-space: nowrap;
}
.dark-toggle:hover { color: var(--accent); border-color: var(--accent); }

/* ── Page header ── */
.page-header { padding: 20px 0 16px; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.page-header h1 {
  font-family: var(--font-mono); font-size: 18px; font-weight: 500;
  color: var(--text-primary); margin-bottom: 4px;
}
.page-header p { font-size: 13px; color: var(--text-secondary); }
.philosophy {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--text-dim); margin-top: 8px;
  border-left: 2px solid var(--accent); padding-left: 8px;
  line-height: 1.6;
}

/* ── VRAM Calculator ── */
.calculator {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  padding: 16px; margin-bottom: 20px;
}
.calc-title {
  font-family: var(--font-mono); font-size: 12px; font-weight: 500;
  color: var(--text-secondary); text-transform: uppercase;
  letter-spacing: 0.05em; margin-bottom: 12px;
}
.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px; margin-bottom: 12px;
}
.calc-field label {
  display: block; font-size: 11px; color: var(--text-secondary);
  font-family: var(--font-mono); margin-bottom: 4px;
}
.calc-field select,
.calc-field input {
  width: 100%; font-family: var(--font-mono); font-size: 12px;
  background: var(--bg-primary); color: var(--text-primary);
  border: 1px solid var(--border); padding: 7px 8px;
  outline: none; appearance: none;
  /* larger touch target on mobile */
  min-height: 36px;
}
.calc-field select:focus,
.calc-field input:focus { border-color: var(--accent); }
.calc-result {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  padding: 10px 12px;
  display: flex; flex-wrap: wrap; gap: 12px; align-items: center;
}
.calc-stat { font-family: var(--font-mono); min-width: 80px; }
.calc-stat .label { font-size: 10px; color: var(--text-dim); display: block; }
.calc-stat .value { font-size: 14px; font-weight: 500; color: var(--text-primary); }
.calc-stat .value.warn { color: var(--accent-warn); }
.calc-stat .value.ok   { color: var(--accent); }

/* ── Filter bar ── */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: 6px;
  align-items: center; margin-bottom: 12px;
}
.filter-label { font-size: 11px; color: var(--text-dim); font-family: var(--font-mono); }
.filter-btn {
  font-family: var(--font-mono); font-size: 11px;
  border: 1px solid var(--border); background: none;
  color: var(--text-secondary); padding: 5px 10px; cursor: pointer;
  transition: all 0.1s; min-height: 30px;
}
.filter-btn:hover              { border-color: var(--accent); color: var(--accent); }
.filter-btn.active             { background: var(--accent); color: #fff; border-color: var(--accent); }
.filter-btn.alert              { border-color: var(--accent-alert); color: var(--accent-alert); }
.filter-btn.alert.active       { background: var(--accent-alert); color: #fff; }
.search-input {
  font-family: var(--font-mono); font-size: 12px;
  background: var(--bg-card); color: var(--text-primary);
  border: 1px solid var(--border); padding: 5px 10px;
  outline: none; width: 100%; min-height: 30px;
}
.search-input:focus { border-color: var(--accent); }
.sort-select {
  font-family: var(--font-mono); font-size: 11px;
  background: var(--bg-card); color: var(--text-secondary);
  border: 1px solid var(--border); padding: 5px 8px;
  outline: none; cursor: pointer; width: 100%; min-height: 30px;
}

/* ── Count bar ── */
.count-bar {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--text-dim); padding: 6px 0; margin-bottom: 8px;
}
.count-bar span { color: var(--text-secondary); }

/* ── Table ── */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table {
  width: 100%; border-collapse: collapse;
  font-family: var(--font-mono); font-size: 12px;
  min-width: 700px; /* force horizontal scroll on mobile before squishing */
}
thead th {
  background: var(--bg-secondary);
  border-bottom: 2px solid var(--border-strong);
  border-top: 1px solid var(--border-strong);
  padding: 8px 10px; text-align: left;
  font-size: 10px; font-weight: 500;
  color: var(--text-secondary); text-transform: uppercase;
  letter-spacing: 0.06em; white-space: nowrap;
  cursor: pointer; user-select: none;
}
thead th:hover        { color: var(--accent); }
thead th.sort-active  { color: var(--accent); }

tbody tr {
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
  transition: opacity 0.2s, background 0.1s;
  cursor: pointer;
}
tbody tr:hover         { background: var(--row-hover); }
tbody tr.dimmed        { opacity: var(--dim-opacity); }
tbody tr.dimmed:hover  { opacity: 0.6; }

td { padding: 8px 10px; vertical-align: middle; white-space: nowrap; }
td.name-cell { white-space: normal; min-width: 160px; }

/* ── GPU name + badges ── */
.gpu-name  { font-weight: 500; font-size: 12px; color: var(--text-primary); }
.gpu-brand { font-size: 10px; color: var(--text-dim); }
.badge-row { display: flex; flex-wrap: wrap; gap: 3px; margin-top: 3px; }
.badge {
  font-size: 9px; font-weight: 500; padding: 1px 5px;
  border-radius: 2px; text-transform: uppercase; letter-spacing: 0.04em;
}
.badge-best    { background: #dcfce7; color: #15803d; border: 1px solid #bbf7d0; }
.badge-warn    { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }
.badge-alert   { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }
.badge-info    { background: #dbeafe; color: #1e40af; border: 1px solid #bfdbfe; }
.badge-neutral { background: var(--bg-secondary); color: var(--text-secondary); border: 1px solid var(--border); }
[data-theme="dark"] .badge-best    { background: #14532d; color: #86efac; border-color: #166534; }
[data-theme="dark"] .badge-warn    { background: #78350f; color: #fcd34d; border-color: #92400e; }
[data-theme="dark"] .badge-alert   { background: #7f1d1d; color: #fca5a5; border-color: #991b1b; }
[data-theme="dark"] .badge-info    { background: #1e3a5f; color: #93c5fd; border-color: #1d4ed8; }

/* ── Data cells ── */
.num   { text-align: right; font-variant-numeric: tabular-nums; }
.green { color: var(--accent); }
.warn  { color: var(--accent-warn); }
.alert { color: var(--accent-alert); }
.dim   { color: var(--text-dim); }

/* ── Ecosystem pill ── */
.eco {
  font-size: 9px; padding: 2px 6px; border-radius: 2px; font-weight: 500;
}
.eco-cuda  { background: #e0f2fe; color: #0369a1; }
.eco-rocm  { background: #fce7f3; color: #9d174d; }
.eco-mlx   { background: #f3e8ff; color: #6b21a8; }
.eco-sycl  { background: #ecfdf5; color: #065f46; }
[data-theme="dark"] .eco-cuda { background: #0c2d48; color: #7dd3fc; }
[data-theme="dark"] .eco-rocm { background: #4c1d38; color: #f9a8d4; }
[data-theme="dark"] .eco-mlx  { background: #2e1065; color: #d8b4fe; }
[data-theme="dark"] .eco-sycl { background: #064e3b; color: #6ee7b7; }

/* ── Risk dot ── */
.risk-dot {
  display: inline-block; width: 8px; height: 8px;
  border-radius: 50%; margin-right: 4px; vertical-align: middle;
}
.risk-low    { background: var(--accent); }
.risk-medium { background: var(--accent-warn); }
.risk-high   { background: var(--accent-alert); }

/* ── Price ── */
.price-wrap { text-align: right; }
.price-main { font-size: 13px; font-weight: 500; color: var(--text-primary); }
.price-src  { font-size: 9px; color: var(--text-dim); }

/* ── Tier separator rows ── */
.tier-header td {
  background: var(--bg-secondary);
  font-family: var(--font-mono); font-size: 10px;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-dim); padding: 5px 10px;
  border-top: 1px solid var(--border-strong);
  border-bottom: 1px solid var(--border);
}
.tier-header:hover { background: var(--bg-secondary) !important; cursor: default; }

/* ── Row detail panel ── */
.detail-row td {
  padding: 0; background: var(--bg-secondary);
  border-bottom: 2px solid var(--border-strong);
}
.detail-inner { padding: 16px; }
.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px; margin-bottom: 12px;
}
.detail-group h4 {
  font-size: 10px; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-dim); margin-bottom: 6px; font-weight: 500;
}
.detail-group p  { font-size: 11px; color: var(--text-secondary); line-height: 1.7; }
.detail-group ul { list-style: none; }
.detail-group ul li { font-size: 11px; color: var(--text-secondary); padding: 1px 0; }
.detail-group ul li::before { content: "→ "; color: var(--accent); }
.gotcha-list { display: flex; flex-wrap: wrap; gap: 4px; }
.gotcha-tag {
  font-size: 9px; padding: 2px 6px;
  background: #fee2e2; color: #991b1b;
  border: 1px solid #fecaca;
}
[data-theme="dark"] .gotcha-tag { background: #7f1d1d; color: #fca5a5; border-color: #991b1b; }
.eco-note {
  font-size: 11px; color: var(--text-secondary);
  border-left: 2px solid var(--accent); padding-left: 8px;
  margin-bottom: 12px; line-height: 1.6;
}

/* ── Mobile card view (replaces table on small screens) ── */
.gpu-cards { display: none; }
.gpu-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-bottom: none;
  padding: 12px;
  cursor: pointer;
  transition: background 0.1s;
}
.gpu-card:last-child { border-bottom: 1px solid var(--border); }
.gpu-card:active { background: var(--row-hover); }
.gpu-card.dimmed { opacity: var(--dim-opacity); }
.card-top {
  display: flex; justify-content: space-between;
  align-items: flex-start; margin-bottom: 6px;
}
.card-name { font-family: var(--font-mono); font-weight: 500; font-size: 13px; }
.card-price {
  font-family: var(--font-mono); font-size: 14px;
  font-weight: 500; text-align: right;
}
.card-price-src { font-size: 9px; color: var(--text-dim); }
.card-specs {
  display: flex; flex-wrap: wrap; gap: 8px;
  font-family: var(--font-mono); font-size: 11px;
  color: var(--text-secondary); margin-bottom: 6px;
}
.card-spec strong { color: var(--text-primary); }
.card-detail {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 12px; margin: 0 -12px -12px;
}

/* ── Sidebar ── */
.sidebar { font-size: 12px; }
.sidebar-block {
  background: var(--bg-card); border: 1px solid var(--border);
  margin-bottom: 16px;
}
.sidebar-block h3 {
  font-family: var(--font-mono); font-size: 10px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-secondary); padding: 8px 12px;
  border-bottom: 1px solid var(--border); background: var(--bg-secondary);
}
.sidebar-block ul { list-style: none; padding: 10px 12px; }
.sidebar-block ul li { margin-bottom: 6px; }
.sidebar-block ul li a {
  color: var(--text-secondary); text-decoration: none;
  font-family: var(--font-mono); font-size: 11px;
}
.sidebar-block ul li a:hover { color: var(--accent); }
.sidebar-note { padding: 10px 12px; font-size: 11px; color: var(--text-secondary); line-height: 1.6; }
.mental-model {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--text-dim); padding: 10px 12px; line-height: 1.8;
}
.mental-model strong { color: var(--accent); font-weight: 500; }

/* ── Ad unit ── */
.ad-unit {
  background: #ffffff; padding: 8px;
  border: 1px solid var(--border); margin-bottom: 16px;
  min-height: 90px; display: flex; align-items: center; justify-content: center;
}
.ad-unit-placeholder { font-size: 10px; color: #ccc; font-family: var(--font-mono); }

/* ── Loading ── */
.loading {
  text-align: center; padding: 60px 20px;
  font-family: var(--font-mono); font-size: 13px; color: var(--text-dim);
}

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border); margin-top: 40px;
  padding: 20px 0; font-size: 11px; color: var(--text-dim);
  font-family: var(--font-mono);
}
footer a { color: var(--text-dim); }
footer a:hover { color: var(--accent); }
.footer-inner {
  display: flex; justify-content: space-between;
  flex-wrap: wrap; gap: 8px;
}

/* ── Utility ── */
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ════════════════════════════════════════
   RESPONSIVE BREAKPOINTS
   ════════════════════════════════════════ */

/* ── Tablet: hide sidebar ── */
@media (max-width: 1024px) {
  .two-col { grid-template-columns: 1fr; }
  .sidebar { display: none; }
}

/* ── Mobile: ≤ 640px ── */
@media (max-width: 640px) {
  html { font-size: 13px; }

  .page-wrap { padding: 0 12px; }

  /* Nav */
  .nav-meta { display: none; }
  .nav-brand { font-size: 14px; }

  /* Header */
  .page-header h1 { font-size: 15px; }
  .page-header p  { font-size: 12px; }
  .philosophy     { font-size: 10px; }

  /* Calculator — stack to 2 columns on mobile */
  .calc-grid { grid-template-columns: 1fr 1fr; }
  .calc-result { gap: 10px; }
  .calc-stat .value { font-size: 13px; }

  /* Filter bar — full width search + sort */
  .filter-bar { gap: 5px; }
  .search-input { width: 100%; order: 10; }
  .sort-select  { width: 100%; order: 11; margin-left: 0; }

  /* Hide desktop table, show card list */
  .table-wrap { display: none; }
  .gpu-cards  { display: block; }

  /* Footer */
  .footer-inner { flex-direction: column; gap: 4px; }
}

/* ── Very small phones: ≤ 380px ── */
@media (max-width: 380px) {
  .calc-grid { grid-template-columns: 1fr; }
}