/* ─── Variables ──────────────────────────────────────────────────────────── */
:root {
  --bg:          #0d1117;
  --bg-card:     #161b22;
  --bg-card2:    #1c2128;
  --border:      #30363d;
  --text:        #e6edf3;
  --text-secondary: #8b949e;
  --accent:      #58a6ff;
  --green:       #3fb950;
  --amber:       #d29922;
  --red:         #f85149;
  --radius:      10px;
  --shadow:      0 4px 20px rgba(0,0,0,0.5);
}

/* ─── Reset / Base ───────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; padding: 2rem 0 4rem; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1,h2,h3,h4 { line-height: 1.3; }
p { margin-bottom: 0.75rem; }
ul { padding-left: 1.4rem; }
li { margin-bottom: 0.4rem; }
strong { color: var(--text); }
small { color: var(--text-secondary); font-size: 0.82rem; }

/* ─── Layout ─────────────────────────────────────────────────────────────── */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ─── Header ─────────────────────────────────────────────────────────────── */
header {
  border-bottom: 1px solid var(--border);
  background: #010409;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}
.logo:hover { text-decoration: none; color: var(--accent); }
nav { display: flex; gap: 1.5rem; flex-wrap: wrap; }
nav a { color: var(--text-secondary); font-size: 0.9rem; }
nav a:hover { color: var(--text); text-decoration: none; }

/* ─── Footer ─────────────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-align: center;
}

/* ─── Hero ───────────────────────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 4rem 1rem 3rem;
}
.hero h1 {
  font-size: 2.4rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #e6edf3 0%, #58a6ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sm { padding: 2.5rem 1rem 2rem; }
.hero-sm h1 { font-size: 1.9rem; }
.hero-sub {
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 1.5rem;
  font-size: 1.05rem;
}

/* ─── Section titles ─────────────────────────────────────────────────────── */
.section-title {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
  padding-top: 1rem;
}
.section-sub {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 760px;
}

/* ─── Cards ──────────────────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

/* ─── Product grid ───────────────────────────────────────────────────────── */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
  margin-bottom: 3rem;
}
.product-card { display: flex; flex-direction: column; gap: 0.6rem; }
.card-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 0.15rem 0.5rem;
  align-self: flex-start;
}
.card-title {
  font-size: 1.1rem;
  margin-top: 0.3rem;
}
.spec-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
}
.spec-label { color: var(--text-secondary); font-size: 0.85rem; }
.spec-value { font-weight: 600; font-size: 1rem; }
.spec-value.price { color: var(--green); font-size: 1.2rem; }
.spec-value.power { color: var(--amber); }
.spec-note {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.45;
  margin-bottom: 0.2rem;
}
.use-case {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: auto;
  padding-top: 0.5rem;
}

/* ─── Buttons ────────────────────────────────────────────────────────────── */
.btn-primary, .btn-secondary {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
  text-decoration: none;
  border: none;
}
.btn-primary {
  background: var(--accent);
  color: #0d1117;
}
.btn-primary:hover { opacity: 0.85; text-decoration: none; color: #0d1117; }
.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  margin-right: 0.5rem;
  margin-top: 0.5rem;
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

/* ─── Model cards ────────────────────────────────────────────────────────── */
.model-note-box {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.2rem 1.5rem;
  margin-bottom: 2rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.model-card { margin-bottom: 2rem; }
.model-header { margin-bottom: 1rem; }
.model-meta { font-size: 0.82rem; color: var(--text-secondary); }
.license-badge {
  display: inline;
  color: var(--green);
  font-weight: 600;
}
.model-description {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 1.2rem;
}
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}
@media (max-width: 640px) { .two-col { grid-template-columns: 1fr; } }
.two-col h4 { font-size: 0.9rem; margin-bottom: 0.6rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.06em; }

/* Spec table (reused in model cards, builds) */
.spec-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.spec-table td { padding: 0.45rem 0; border-bottom: 1px solid var(--border); vertical-align: top; }
.spec-table td:first-child { color: var(--text-secondary); width: 55%; }
.note-inline { font-size: 0.78rem; color: var(--text-secondary); }

/* Math box */
.math-box {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
}
.math-step {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.35rem 0;
  font-size: 0.88rem;
}
.math-label { color: var(--text-secondary); }
.math-val { font-weight: 600; white-space: nowrap; }
.math-total {
  border-top: 1px solid var(--border);
  margin-top: 0.3rem;
  padding-top: 0.5rem;
}
.math-total .math-label { color: var(--text); font-weight: 600; }
.math-total .math-val { color: var(--green); font-size: 1.05rem; }

/* Hardware options */
.hw-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.2rem;
}
@media (max-width: 640px) { .hw-options { grid-template-columns: 1fr; } }
.hw-option {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
}
.hw-option-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ─── Builds (choose page) ───────────────────────────────────────────────── */
.builds-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}
@media (max-width: 860px) { .builds-grid { grid-template-columns: 1fr; } }
.build-card { display: flex; flex-direction: column; gap: 1rem; }
.build-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--green);
  border: 1px solid var(--green);
  border-radius: 4px;
  padding: 0.15rem 0.5rem;
  align-self: flex-start;
}
.build-title { font-size: 1.3rem; }
.build-subtitle { color: var(--text-secondary); font-size: 0.9rem; }
.build-model-box {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
}
.build-model-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--text-secondary); margin-bottom: 0.25rem; }
.build-model-name { font-size: 1.1rem; font-weight: 700; color: var(--accent); margin-bottom: 0.4rem; }
.build-model-note { font-size: 0.85rem; color: var(--text-secondary); margin: 0; }
.build-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.build-table th {
  text-align: left;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  padding: 0.4rem 0.6rem 0.4rem 0;
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.build-table td {
  padding: 0.5rem 0.6rem 0.5rem 0;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.build-table tfoot td {
  padding-top: 0.6rem;
  border-top: 2px solid var(--border);
  border-bottom: none;
}
.total-row .price { color: var(--green); font-size: 1.1rem; }

/* Power box */
.power-box {
  background: #1c1800;
  border: 1px solid #5a4500;
  border-left: 3px solid var(--amber);
  border-radius: 6px;
  padding: 1rem 1.2rem;
}
.power-box-title {
  font-weight: 700;
  color: var(--amber);
  margin-bottom: 0.6rem;
}
.power-box li { font-size: 0.88rem; }

/* Cluster box */
.cluster-box {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-left: 3px solid #8b949e;
  border-radius: 6px;
  padding: 1rem 1.2rem;
  font-size: 0.88rem;
}
.cluster-title {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}
.cluster-box p { margin-bottom: 0.6rem; }

/* ─── Quote form ─────────────────────────────────────────────────────────── */
.form-card { max-width: 580px; margin: 0 auto; }
.field { margin-bottom: 1.4rem; }
.field label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}
.field input, .field select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 0.6rem 0.85rem;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.15s;
}
.field input:focus, .field select:focus { border-color: var(--accent); }
.field small { display: block; margin-top: 0.3rem; }
.field select option { background: var(--bg-card); }
.error-box {
  background: #2d0f0f;
  border: 1px solid var(--red);
  border-radius: 6px;
  color: var(--red);
  padding: 0.8rem 1rem;
  margin-bottom: 1.2rem;
  font-size: 0.9rem;
}
.form-note {
  margin-top: 1.5rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

/* ─── Confirmation ───────────────────────────────────────────────────────── */
.confirm-card { max-width: 580px; margin: 0 auto; }
.confirm-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--green);
  margin-bottom: 0.5rem;
}
.confirm-msg { font-size: 1rem; margin-bottom: 1rem; }
.confirm-actions { margin-top: 1.5rem; }

/* ─── Requests table ─────────────────────────────────────────────────────── */
.requests-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  min-width: 600px;
}
.requests-table th {
  text-align: left;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  padding: 0.5rem 0.8rem 0.5rem 0;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.requests-table td {
  padding: 0.55rem 0.8rem 0.55rem 0;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.requests-table tbody tr:hover { background: var(--bg-card2); }