/* CustomerInsight AI — main stylesheet */
:root {
  --bg: #f6f3ee;
  --bg-soft: #ede8df;
  --surface: #fffdfa;
  --surface-2: #f1ece3;
  --text: #171512;
  --text-dim: #70695f;
  --accent: #8a6a3f;
  --accent-2: #3d352b;
  --good: #10b981;
  --warn: #f59e0b;
  --bad: #ef4444;
  --border: rgba(37, 32, 25, 0.12);
  --border-strong: rgba(37, 32, 25, 0.2);
  --shadow: 0 22px 70px rgba(54, 43, 30, 0.08);
  --radius: 18px;
}

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

body {
  font-family: 'Inter', -apple-system, 'Segoe UI', Roboto, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.55;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); }

/* Nav */
.topnav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 36px;
  background: rgba(246, 243, 238, 0.9);
  backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 650;
  font-size: 1rem;
  letter-spacing: -0.02em;
}
.logo:hover { color: var(--text); }
.logo-icon {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  color: transparent;
  display: inline-block;
}
.logo-text em { font-style: normal; color: var(--accent); font-weight: 650; }
.nav-right { display: flex; gap: 18px; align-items: center; }
.nav-link {
  color: var(--text-dim);
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 999px;
  transition: all 0.15s;
}
.nav-link:hover { color: var(--text); background: rgba(255, 253, 250, 0.75); }
.lang-toggle {
  cursor: pointer;
  padding: 6px 12px;
  border-radius: 999px;
  background: transparent;
  border: 1px solid var(--border);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
  user-select: none;
}
.lang-toggle .lang-active { color: var(--text); }
.lang-toggle:hover { background: var(--surface); }

/* Main */
.main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 34px 36px 80px;
}

/* Hero */
.hero {
  padding: 34px 0 34px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 4.8rem);
  font-weight: 520;
  letter-spacing: -0.07em;
  margin: 0 0 12px;
  color: var(--text);
  line-height: 0.95;
  max-width: 940px;
}
.hero-sub {
  color: var(--text-dim);
  font-size: 1.05rem;
  margin: 0;
  max-width: 680px;
}

/* KPI grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-bottom: 36px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.kpi-card {
  background: transparent;
  border-right: 1px solid var(--border);
  border-radius: 0;
  padding: 20px 22px;
  position: relative;
  overflow: hidden;
}
.kpi-card:last-child { border-right: 0; }
.kpi-label {
  color: var(--text-dim);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
  position: relative;
}
.kpi-value {
  font-size: 1.95rem;
  font-weight: 520;
  letter-spacing: -0.04em;
  margin-top: 6px;
  position: relative;
}
.kpi-sub {
  color: var(--text-dim);
  font-size: 0.82rem;
  margin-top: 4px;
  position: relative;
}

/* Cards */
.card {
  background: transparent;
  border-top: 1px solid var(--border);
  border-radius: 0;
  padding: 24px 0 30px;
  margin-bottom: 28px;
  box-shadow: none;
}
.card h2 {
  font-size: 1.05rem;
  font-weight: 560;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}
.card-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  flex-wrap: wrap;
  gap: 12px;
}
.card-header-row h2 { margin: 0; }
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  margin-bottom: 30px;
}
.grid-2 .card { margin-bottom: 0; }

.section-block {
  border-top: 1px solid var(--border);
  padding: 28px 0 34px;
  margin-bottom: 26px;
}

.section-block h2,
.chart-section h2,
.data-section h2 {
  font-size: 1.05rem;
  font-weight: 560;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}

.analytics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  margin-bottom: 30px;
}

.chart-section,
.data-section {
  border-top: 1px solid var(--border);
  padding-top: 28px;
}

/* Charts */
.chart-wrap { position: relative; height: 280px; }
.chart-wrap-wide { position: relative; height: 320px; }

/* Segments table (cards) */
.segments-table {
  display: block;
  border-top: 1px solid var(--border);
}
.seg-row {
  border: 0;
  border-bottom: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0;
  padding: 18px 0 18px 18px;
  background: transparent;
}
.seg-row-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}
.seg-name {
  font-weight: 560;
  font-size: 0.98rem;
}
.seg-name small { color: var(--text-dim); font-weight: 400; margin-left: 6px; font-size: 0.8rem; }
.seg-count {
  background: transparent;
  border: 1px solid var(--border);
  padding: 2px 10px;
  border-radius: 10px;
  font-size: 0.78rem;
  font-weight: 600;
}
.seg-desc { color: var(--text-dim); font-size: 0.86rem; margin: 6px 0; }
.seg-strategy {
  font-size: 0.85rem;
  color: var(--text-dim);
  background: transparent;
  border-radius: 0;
  padding: 8px 0 0;
  margin-top: 8px;
  border-left: 0;
}

/* Data table */
.table-wrap { overflow-x: auto; }
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  border-collapse: separate;
  border-spacing: 0;
  box-shadow: var(--shadow);
}
.data-table th, .data-table td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}
.data-table th {
  color: var(--text-dim);
  font-weight: 500;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  background: var(--surface-2);
}
.data-table tr:hover { background: rgba(138, 106, 63, 0.06); }
.data-table tr td:first-child { color: var(--text-dim); font-family: monospace; }

.segment-chip {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text) !important;
  background: transparent !important;
  border: 1px solid var(--border-strong);
}

.btn-row {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border-strong);
  padding: 5px 12px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 500;
}
.btn-row:hover { background: var(--text); color: var(--surface); }

/* Filters */
.filters { display: flex; gap: 10px; flex-wrap: wrap; }
.filters select, .filters input {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 0.88rem;
  font-family: inherit;
}
.filters select:focus, .filters input:focus { outline: 1px solid var(--accent); }
.filters input { width: 240px; }

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 16px;
  flex-wrap: wrap;
}
.pagination button {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.85rem;
}
.pagination button:hover { background: var(--surface-2); }
.pagination button.active {
  background: var(--text);
  border-color: var(--text);
  color: var(--surface);
}
.pagination button:disabled { opacity: 0.4; cursor: not-allowed; }

/* Customer detail */
.back-link {
  display: inline-block;
  color: var(--text-dim);
  margin-bottom: 14px;
  font-size: 0.9rem;
}
.back-link:hover { color: var(--text); }

.customer-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.customer-name { font-size: 1.7rem; font-weight: 700; margin: 0; }
.customer-meta { color: var(--text-dim); font-size: 0.95rem; margin-top: 4px; }
.customer-segment-tag {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text) !important;
  padding: 8px 16px;
  border-radius: 999px;
  background: transparent !important;
  border: 1px solid var(--border-strong);
  white-space: nowrap;
}

.rfm-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}
.rfm-card {
  background: transparent;
  border-radius: 0;
  padding: 14px;
  text-align: center;
  border: 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.rfm-card .lbl { color: var(--text-dim); font-size: 0.85rem; }
.rfm-card .val { font-size: 1.7rem; font-weight: 700; margin-top: 4px; }
.rfm-card .sub { font-size: 0.8rem; color: var(--text-dim); margin-top: 2px; }

.strategy-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}
.strategy-card h3 { margin: 0 0 6px; font-size: 1rem; }
.strategy-card p { margin: 4px 0; }
.strategy-meta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--text-dim);
}
.strategy-meta b { color: var(--text); }

.fav-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 6px;
}
.fav-tag {
  background: transparent;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  border: 1px solid var(--border);
}

/* Skeleton */
.skeleton {
  background: var(--surface-2);
  border-radius: 8px;
  height: 60px;
}

/* Forms */
.predict-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.predict-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-weight: 500;
}
.predict-form input {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 9px 12px;
  border-radius: 12px;
  font-size: 1rem;
  font-family: inherit;
}
.predict-form input:focus { outline: 1px solid var(--accent); }
.predict-form small { color: var(--text-dim); font-size: 0.78rem; }
.btn-primary {
  background: var(--text);
  color: var(--surface);
  border: 1px solid var(--text);
  padding: 11px 22px;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 6px;
}
.btn-primary:hover { background: var(--accent-2); border-color: var(--accent-2); }

.prediction-result { min-height: 200px; }
.prediction-result .placeholder { color: var(--text-dim); }
.result-segment {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.result-score {
  display: inline-block;
  background: var(--surface-2);
  padding: 4px 12px;
  border-radius: 999px;
  font-family: monospace;
  font-size: 0.95rem;
  margin-bottom: 10px;
}

/* Info grid (predict page) */
.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.info-block {
  background: transparent;
  border-radius: 0;
  padding: 0 18px 0 0;
  text-align: left;
  border: 0;
  border-right: 1px solid var(--border);
}
.info-block:last-child { border-right: 0; }
.info-letter {
  font-size: 2.4rem;
  font-weight: 520;
  line-height: 1;
}
.info-block h3 { margin: 8px 0 6px; }
.info-block p { color: var(--text-dim); font-size: 0.88rem; margin: 0; }

/* Footer */
.footer {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.82rem;
  padding: 30px 0;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

/* Responsive */
@media (max-width: 900px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .analytics-grid { grid-template-columns: 1fr; }
  .info-grid { grid-template-columns: 1fr; }
  .info-block { border-right: 0; border-bottom: 1px solid var(--border); padding-bottom: 18px; }
  .main { padding: 16px; }
  .topnav { padding: 12px 16px; }
}