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

:root {
  --ink:       #0F1923;
  --ink-mid:   #374151;
  --ink-mute:  #6B7280;
  --ink-faint: #9CA3AF;
  --rule:      #E5E7EB;
  --rule-mid:  #D1D5DB;
  --surface:   #FFFFFF;
  --surface-2: #F9FAFB;
  --surface-3: #F3F4F6;
  --teal:      #0F766E;
  --teal-mid:  #14B8A6;
  --teal-light:#CCFBF1;
  --amber:     #D97706;
  --amber-light:#FEF3C7;
  --red-light: #FEE2E2;
  --green-light:#DCFCE7;
  --font-sans: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'DM Mono', monospace;
  --radius:    8px;
  --radius-lg: 14px;
  --shadow:    0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-lg: 0 4px 16px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--surface-2);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Header ─────────────────────────────────────────────────────── */
.site-header {
  background: var(--ink);
  border-bottom: 1px solid rgba(255,255,255,.08);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: .875rem;
  padding-bottom: .875rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: .625rem;
}

.logo-mark {
  width: 28px;
  height: 28px;
  background: var(--teal);
  color: white;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .04em;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
}

.logo-text {
  font-size: 16px;
  font-weight: 600;
  color: white;
  letter-spacing: -.01em;
}

.nav-badge {
  font-size: 11px;
  font-weight: 500;
  color: var(--teal-mid);
  background: rgba(20,184,166,.15);
  border: 1px solid rgba(20,184,166,.25);
  padding: 2px 8px;
  border-radius: 20px;
  letter-spacing: .04em;
}

/* ── Hero ───────────────────────────────────────────────────────── */
.hero {
  background: var(--ink);
  padding: 5rem 0 4rem;
  border-bottom: 1px solid rgba(255,255,255,.06);
}

.hero-eyebrow {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--teal-mid);
  margin-bottom: 1.25rem;
  font-family: var(--font-mono);
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 300;
  color: white;
  line-height: 1.15;
  letter-spacing: -.02em;
  margin-bottom: 1.25rem;
}

.hero-title em {
  font-style: normal;
  color: var(--teal-mid);
  font-weight: 500;
}

.hero-sub {
  font-size: 1.0625rem;
  color: rgba(255,255,255,.55);
  max-width: 520px;
  line-height: 1.65;
  margin-bottom: 2rem;
}

.btn-hero {
  display: inline-block;
  background: var(--teal);
  color: white;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  padding: .75rem 1.5rem;
  border-radius: var(--radius);
  transition: background .15s, transform .1s;
  letter-spacing: .01em;
}

.btn-hero:hover {
  background: var(--teal-mid);
  transform: translateY(-1px);
}

/* ── Analyser Section ───────────────────────────────────────────── */
.analyser-section {
  padding: 3rem 0 5rem;
}

.analyser-card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.analyser-header {
  margin-bottom: 1.5rem;
}

.analyser-header h2 {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: .375rem;
}

.analyser-header p {
  font-size: 14px;
  color: var(--ink-mute);
  line-height: 1.6;
}

/* Report type pills */
.report-types {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 1.5rem;
}

.report-type {
  display: flex;
  align-items: center;
  gap: .375rem;
  font-size: 12px;
  color: var(--ink-mid);
  background: var(--surface-3);
  border: 1px solid var(--rule);
  border-radius: 20px;
  padding: .25rem .75rem;
  font-family: var(--font-mono);
}

.rt-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal);
  flex-shrink: 0;
}

/* Drop zone */
.drop-zone {
  border: 1.5px dashed var(--rule-mid);
  border-radius: var(--radius-lg);
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: background .15s, border-color .15s;
  background: var(--surface-2);
  margin-bottom: 1.25rem;
}

.drop-zone:hover, .drop-zone.drag {
  background: var(--teal-light);
  border-color: var(--teal);
}

.drop-zone:focus {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.drop-icon {
  font-size: 24px;
  color: var(--ink-faint);
  margin-bottom: .5rem;
  display: block;
}

.drop-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-mid);
  margin-bottom: .25rem;
}

.drop-sub {
  font-size: 13px;
  color: var(--ink-mute);
}

/* File summary */
.file-summary {
  margin-bottom: 1rem;
}

.summary-stats {
  font-size: 14px;
  color: var(--ink-mid);
  padding: .75rem 1rem;
  background: var(--surface-3);
  border-radius: var(--radius);
  border: 1px solid var(--rule);
  margin-bottom: .5rem;
}

.summary-stats strong { color: var(--ink); }

.debug-line {
  font-size: 11px;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  padding: .375rem .75rem;
  background: var(--surface-3);
  border-radius: var(--radius);
  word-break: break-all;
  line-height: 1.5;
}

/* Progress */
.progress-wrap {
  margin-bottom: 1rem;
}

.progress-label {
  font-size: 13px;
  color: var(--ink-mid);
  margin-bottom: .375rem;
}

.progress-track {
  height: 4px;
  background: var(--surface-3);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: .375rem;
}

.progress-fill {
  height: 100%;
  background: var(--teal);
  border-radius: 2px;
  transition: width .2s;
  width: 0%;
}

.progress-count {
  font-size: 12px;
  color: var(--ink-faint);
  font-family: var(--font-mono);
}

/* Error */
.error-msg {
  font-size: 14px;
  color: #991B1B;
  background: var(--red-light);
  border-radius: var(--radius);
  padding: .75rem 1rem;
  margin-bottom: 1rem;
  border-left: 3px solid #DC2626;
}

/* Analyse button */
.btn-analyse {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  padding: .875rem;
  background: var(--ink);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: background .15s, transform .1s;
  font-family: var(--font-sans);
}

.btn-analyse:hover:not(:disabled) {
  background: var(--teal);
  transform: translateY(-1px);
}

.btn-analyse:disabled {
  opacity: .35;
  cursor: not-allowed;
}

.btn-arrow {
  font-size: 16px;
  transition: transform .15s;
}

.btn-analyse:hover:not(:disabled) .btn-arrow {
  transform: translateX(3px);
}

/* ── Results ────────────────────────────────────────────────────── */
.results-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.results-header h2 {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--ink);
}

.results-meta {
  font-size: 13px;
  color: var(--ink-mute);
  margin-top: .25rem;
  font-family: var(--font-mono);
}

.btn-reset {
  font-size: 13px;
  color: var(--ink-mute);
  background: transparent;
  border: 1px solid var(--rule-mid);
  border-radius: var(--radius);
  padding: .5rem 1rem;
  cursor: pointer;
  white-space: nowrap;
  font-family: var(--font-sans);
  transition: color .15s, border-color .15s;
}

.btn-reset:hover {
  color: var(--ink);
  border-color: var(--ink);
}

/* Metrics */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: .75rem;
  margin-bottom: 1.25rem;
}

.metric-card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
}

.metric-label {
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--ink-mute);
  margin-bottom: .375rem;
  font-family: var(--font-mono);
}

.metric-value {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -.02em;
  line-height: 1;
  margin-bottom: .25rem;
}

.metric-sub {
  font-size: 11px;
  color: var(--ink-faint);
}

/* Result cards */
.result-card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.card-label {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--ink-mute);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
}

.powered-by {
  font-size: 10px;
  color: var(--teal);
  background: var(--teal-light);
  padding: 2px 8px;
  border-radius: 20px;
  letter-spacing: .04em;
}

/* DOW Chart */
.dow-row {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: .5rem;
}

.dow-label {
  font-size: 12px;
  color: var(--ink-mid);
  width: 72px;
  text-align: right;
  flex-shrink: 0;
  font-family: var(--font-mono);
}

.dow-track {
  flex: 1;
  height: 20px;
  background: var(--surface-3);
  border-radius: 4px;
  overflow: hidden;
}

.dow-fill {
  height: 100%;
  border-radius: 4px;
  display: flex;
  align-items: center;
  padding-left: 8px;
  transition: width .6s ease;
}

.dow-fill span {
  font-size: 11px;
  font-weight: 500;
  font-family: var(--font-mono);
  white-space: nowrap;
}

/* Heatmap */
.heatmap-wrap { overflow-x: auto; }

.heatmap-day-labels {
  display: flex;
  gap: 3px;
  padding-left: 56px;
  margin-bottom: 4px;
}

.heatmap-day-label {
  width: 28px;
  font-size: 10px;
  color: var(--ink-faint);
  text-align: center;
  font-family: var(--font-mono);
}

.heatmap-row {
  display: flex;
  align-items: center;
  gap: 3px;
  margin-bottom: 2px;
}

.heatmap-hour-label {
  font-size: 10px;
  color: var(--ink-faint);
  width: 50px;
  text-align: right;
  flex-shrink: 0;
  font-family: var(--font-mono);
  padding-right: 6px;
}

.heatmap-cells { display: flex; gap: 3px; }

.heatmap-cell {
  width: 28px;
  height: 22px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 8px;
  font-family: var(--font-mono);
  cursor: default;
  transition: transform .1s;
}

.heatmap-cell:hover { transform: scale(1.2); z-index: 10; position: relative; }

.heatmap-legend {
  font-size: 11px;
  color: var(--ink-faint);
  margin-top: .75rem;
}

/* Flags */
.flag {
  display: flex;
  align-items: flex-start;
  gap: .625rem;
  padding: .75rem 1rem;
  border-radius: var(--radius);
  font-size: 13px;
  margin-bottom: .5rem;
  line-height: 1.5;
  border-left: 3px solid;
}

.flag-icon { font-size: 14px; flex-shrink: 0; margin-top: 1px; }
.flag.good  { background: var(--green-light); border-color: #16A34A; color: #14532D; }
.flag.warn  { background: var(--amber-light); border-color: var(--amber); color: #78350F; }
.flag.info  { background: var(--teal-light);  border-color: var(--teal); color: #134E4A; }

/* Brief */
.brief-card { margin-bottom: 1rem; }

.brief-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-mid);
  white-space: pre-wrap;
  min-height: 80px;
}

.brief-text::after {
  content: '▋';
  animation: blink .8s step-end infinite;
  color: var(--teal);
  display: none;
}

.brief-text.streaming::after { display: inline; }

@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

/* ── Footer ─────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--rule);
  padding: 2rem 0;
  background: var(--surface);
}

.site-footer .container {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-logo {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -.01em;
}

.footer-tag {
  font-size: 13px;
  color: var(--ink-faint);
}

/* ── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .hero { padding: 3rem 0 2.5rem; }
  .analyser-card { padding: 1.25rem; }
  .result-card { padding: 1.25rem; }
  .results-header { flex-direction: column; }
  .report-types { gap: .375rem; }
  .site-footer .container { flex-direction: column; align-items: flex-start; gap: .25rem; }
}