:root {
  --bg: #111318;
  --bg-alt: #161820;
  --fg: #f0ede6;
  --fg-muted: #9a958a;
  --accent: #c8f038;
  --accent-dim: #8ab528;
  --border: rgba(255,255,255,0.08);
  --font-sans: 'DM Sans', system-ui, sans-serif;
  --font-serif: 'Instrument Serif', Georgia, serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ——— NAV ——— */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.75rem 5%;
  border-bottom: 1px solid var(--border);
}
.nav-brand {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--fg);
}
.nav-tag {
  font-size: 0.8125rem;
  color: var(--fg-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ——— HERO ——— */
.hero {
  padding: 7rem 5% 6rem;
  max-width: 1200px;
}
.hero-eyebrow {
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2rem;
  font-weight: 600;
}
.hero-headline {
  font-family: var(--font-serif);
  font-size: clamp(3.5rem, 8vw, 7rem);
  line-height: 1.05;
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 2.5rem;
}
.hero-headline em {
  font-style: italic;
  color: var(--accent);
}
.hero-sub {
  font-size: 1.1875rem;
  color: var(--fg-muted);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 4rem;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
}
.stat {
  display: flex;
  flex-direction: column;
  padding-right: 3rem;
}
.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--fg);
  line-height: 1;
}
.stat-unit {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.75rem;
}
.stat-label {
  font-size: 0.8125rem;
  color: var(--fg-muted);
  margin-top: 0.25rem;
}
.stat-divider {
  width: 1px;
  height: 60px;
  background: var(--border);
  margin-right: 3rem;
}

/* ——— SECTION LABEL ——— */
.section-label {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 3rem;
}

/* ——— HOW IT WORKS ——— */
.howitworks {
  background: var(--bg-alt);
  padding: 6rem 5%;
}
.steps {
  max-width: 800px;
}
.step {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 2.5rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border);
}
.step:last-child { border-bottom: none; }
.step-number {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  padding-top: 0.5rem;
  font-family: var(--font-sans);
}
.step h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}
.step p {
  font-size: 1rem;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* ——— CONTRAST ——— */
.contrast {
  padding: 6rem 5%;
  max-width: 1100px;
}
.comparison-table {
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.comparison-header {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.comparison-col-traditional { color: var(--fg-muted); }
.comparison-col-modelix { color: var(--accent); }
.comparison-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.9375rem;
}
.comparison-row:last-child { border-bottom: none; }
.comparison-feature { color: var(--fg-muted); }
.comparison-val { font-weight: 500; }
.comparison-val.traditional { color: var(--fg-muted); text-decoration: line-through; opacity: 0.6; }
.comparison-val.modelix { color: var(--fg); }

/* ——— OUTCOMES ——— */
.outcomes {
  background: var(--bg-alt);
  padding: 6rem 5%;
}
.outcomes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2px;
}
.outcome {
  padding: 2.5rem;
  border: 1px solid var(--border);
  background: var(--bg-alt);
}
.outcome-icon {
  color: var(--accent);
  margin-bottom: 1.25rem;
}
.outcome h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
}
.outcome p {
  font-size: 0.9375rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* ——— CLOSING ——— */
.closing {
  padding: 8rem 5%;
  max-width: 900px;
}
.closing-statement {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 400;
  line-height: 1.35;
  color: var(--fg);
  letter-spacing: -0.01em;
}

/* ——— FOOTER ——— */
.footer {
  padding: 3rem 5%;
  border-top: 1px solid var(--border);
}
.footer-brand {
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}
.footer-sub {
  font-size: 0.875rem;
  color: var(--fg-muted);
}

/* ——— DASHBOARD APP ——— */
.dashboard { padding: 3rem 5%; max-width: 1100px; }
.dashboard-header { margin-bottom: 3rem; }
.dashboard-title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}
.dashboard-sub { color: var(--fg-muted); font-size: 1rem; }
.card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2rem;
  margin-bottom: 2rem;
}
.card-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 1.5rem;
}
.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  color: var(--fg);
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  outline: none;
  transition: border-color 0.15s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--accent); }
.form-group .hint { font-size: 0.8125rem; color: var(--fg-muted); margin-top: 0.35rem; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: #111318;
  font-weight: 700;
  font-size: 0.9375rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: background 0.15s;
}
.btn:hover { background: var(--accent-dim); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-ghost { background: transparent; color: var(--fg-muted); border: 1px solid var(--border); }
.btn-ghost:hover { color: var(--fg); border-color: rgba(255,255,255,0.2); }
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 1.5rem;
}
.result-card { background: var(--bg-alt); padding: 1.5rem; }
.result-card .metric-label {
  font-size: 0.75rem; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--fg-muted); font-weight: 600; margin-bottom: 0.4rem;
}
.result-card .metric-value { font-size: 2rem; font-weight: 700; letter-spacing: -0.03em; }
.result-card .metric-value.accent { color: var(--accent); }
.result-card .metric-sub { font-size: 0.8125rem; color: var(--fg-muted); margin-top: 0.3rem; }
.error-msg {
  background: rgba(255,80,80,0.1); border: 1px solid rgba(255,80,80,0.3);
  border-radius: 4px; padding: 0.75rem 1rem; color: #ff8080; font-size: 0.875rem; margin-bottom: 1rem;
}
.success-msg {
  background: rgba(200,240,56,0.08); border: 1px solid rgba(200,240,56,0.3);
  border-radius: 4px; padding: 0.75rem 1rem; color: var(--accent); font-size: 0.875rem; margin-bottom: 1rem;
}
.file-drop {
  border: 2px dashed var(--border);
  border-radius: 4px;
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.file-drop:hover, .file-drop.drag-over { border-color: var(--accent); background: rgba(200,240,56,0.04); }
.file-drop input[type="file"] { display: none; }
.file-drop p { font-size: 0.875rem; color: var(--fg-muted); margin-top: 0.5rem; }
.file-drop .filename { font-weight: 600; color: var(--fg); font-size: 0.9375rem; }
table.data-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
table.data-table th {
  text-align: left; padding: 0.6rem 0.75rem;
  color: var(--fg-muted); font-size: 0.75rem;
  text-transform: uppercase; letter-spacing: 0.08em;
  border-bottom: 1px solid var(--border); font-weight: 600;
}
table.data-table td { padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--border); color: var(--fg); }
table.data-table tr:last-child td { border-bottom: none; }
.nav-link { font-size: 0.875rem; color: var(--fg-muted); text-decoration: none; transition: color 0.15s; }
.nav-link:hover { color: var(--fg); }
.spinner {
  display: inline-block; width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.2); border-top-color: var(--accent);
  border-radius: 50%; animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ——— RESPONSIVE ——— */
@media (max-width: 768px) {
  .hero { padding: 4rem 5% 4rem; }
  .hero-headline { font-size: 3rem; }
  .hero-stats { flex-direction: column; align-items: flex-start; gap: 1.5rem; }
  .stat-divider { display: none; }
  .stat { padding-right: 0; }
  .step { grid-template-columns: 2.5rem 1fr; gap: 1.5rem; }
  .comparison-header,
  .comparison-row { grid-template-columns: 1fr 1fr; }
  .comparison-col-label { display: none; }
  .comparison-feature { grid-column: 1 / -1; font-size: 0.875rem; color: var(--fg); margin-bottom: 0.5rem; }
  .comparison-col-traditional,
  .comparison-col-modelix { font-size: 0.875rem; }
  .outcomes-grid { grid-template-columns: 1fr; }
  .closing { padding: 5rem 5%; }
}