/* CoSE (Collaborative Science Environment) Color Theme & Styles */
/* Palette: #004053 deep teal, #0F7F9F primary blue, facets #5590AD #7EA5BD #668C98 #99B2BA #CCD9DD #1E404F */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  /* CoSE Light Theme (Default) */
  --teal: #004053;
  --blue: #0F7F9F;
  --blue-soft: #5590AD;
  --blue-pale: #CCD9DD;
  --bg: #F6F9FA;
  --surface: #FFFFFF;
  --surface-2: #EAF1F3;
  --ink: #12303A;
  --ink-2: #3E5C66;
  --muted: #6C858D;
  --line: #D5E0E4;
  --line-strong: #B7C8CE;
  --accent: #0F7F9F;
  --accent-ink: #FFFFFF;
  --heading: #004053;
  --shadow: 0 1px 2px rgba(0, 64, 83, .06), 0 8px 24px rgba(0, 64, 83, .06);
  --shadow-hover: 0 4px 16px rgba(0, 64, 83, .12);
  --sans: "IBM Plex Sans", "Segoe UI", Calibri, system-ui, sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --radius: 6px;
  --radius-sm: 4px;
  --radius-lg: 10px;

  /* Crop category accent colors in CoSE aesthetic */
  --cat-lettuce: #0F7F9F;
  --cat-greens: #004053;
  --cat-herbs: #5590AD;
  --cat-fruit: #D9534F;
  --cat-tubers: #E67E22;
}

/* System Dark Preference fallback */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0C1A1F;
    --surface: #122730;
    --surface-2: #17323C;
    --ink: #E3ECEF;
    --ink-2: #B7C8CE;
    --muted: #8AA3AB;
    --line: #23404A;
    --line-strong: #345561;
    --accent: #3FA9C7;
    --accent-ink: #061418;
    --heading: #DCEBF0;
    --teal: #DCEBF0;
    --shadow: 0 1px 3px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .4);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, .6);

    --cat-lettuce: #3FA9C7;
    --cat-greens: #7EA5BD;
    --cat-herbs: #5590AD;
    --cat-fruit: #F87171;
    --cat-tubers: #FBBF24;
  }
}

/* Explicit Dark Theme */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0C1A1F;
  --surface: #122730;
  --surface-2: #17323C;
  --ink: #E3ECEF;
  --ink-2: #B7C8CE;
  --muted: #8AA3AB;
  --line: #23404A;
  --line-strong: #345561;
  --accent: #3FA9C7;
  --accent-ink: #061418;
  --heading: #DCEBF0;
  --teal: #DCEBF0;
  --shadow: 0 1px 3px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .4);
  --shadow-hover: 0 4px 20px rgba(0, 0, 0, .6);

  --cat-lettuce: #3FA9C7;
  --cat-greens: #7EA5BD;
  --cat-herbs: #5590AD;
  --cat-fruit: #F87171;
  --cat-tubers: #FBBF24;
}

/* Explicit Light Theme */
:root[data-theme="light"] {
  color-scheme: light;
  --bg: #F6F9FA;
  --surface: #FFFFFF;
  --surface-2: #EAF1F3;
  --ink: #12303A;
  --ink-2: #3E5C66;
  --muted: #6C858D;
  --line: #D5E0E4;
  --line-strong: #B7C8CE;
  --accent: #0F7F9F;
  --accent-ink: #FFFFFF;
  --heading: #004053;
  --teal: #004053;
  --shadow: 0 1px 2px rgba(0, 64, 83, .06), 0 8px 24px rgba(0, 64, 83, .06);
  --shadow-hover: 0 4px 16px rgba(0, 64, 83, .12);

  --cat-lettuce: #0F7F9F;
  --cat-greens: #004053;
  --cat-herbs: #5590AD;
  --cat-fruit: #D9534F;
  --cat-tubers: #E67E22;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  background-color: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  font-size: 16px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.25s ease, color 0.25s ease;
}

/* ---- Header (Top Bar Only - No Side Panel) ---- */
header.cose-header {
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.nav-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  min-height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--heading);
}

.brand-logo {
  width: 32px;
  height: 32px;
  background: var(--heading);
  color: var(--accent-ink);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  font-weight: 700;
}

.brand-text h1 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--heading);
  letter-spacing: -0.01em;
}

.brand-text p {
  font-size: 0.72rem;
  color: var(--muted);
  font-family: var(--mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
}

.nav-link {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

.nav-link:hover {
  color: var(--accent);
  text-decoration: none;
}

.badge-fair {
  background: var(--surface-2);
  color: var(--accent);
  border: 1px solid var(--line-strong);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: 600;
  font-family: var(--mono);
}

/* Light/Dark Toggle Button */
.theme-toggle-btn {
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s;
}

.theme-toggle-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Main Wrap */
main {
  max-width: 1240px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  flex: 1;
  width: 100%;
}

/* CoSE Eyebrow */
.eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.6rem;
}

/* Hero Section */
.hero {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
  position: relative;
  transition: background-color 0.25s, border-color 0.25s;
}

.hero h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 700;
  color: var(--heading);
  line-height: 1.2;
  margin-bottom: 0.9rem;
  letter-spacing: -0.02em;
}

.hero p.lede {
  color: var(--ink-2);
  font-size: 1.05rem;
  max-width: 900px;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--muted);
}

.hero-meta strong {
  color: var(--ink);
}

.hero-meta a {
  color: var(--accent);
  text-decoration: none;
}

.hero-meta a:hover {
  text-decoration: underline;
}

/* KPI Cards Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.kpi-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.kpi-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
}

.kpi-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.kpi-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  font-family: var(--mono);
  letter-spacing: 0.08em;
}

.kpi-icon {
  font-size: 1.2rem;
}

.kpi-value {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--heading);
  line-height: 1.1;
  margin-bottom: 0.35rem;
  font-family: var(--sans);
}

.kpi-unit {
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent);
  margin-left: 0.25rem;
}

.kpi-desc {
  font-size: 0.82rem;
  color: var(--ink-2);
}

/* Section Card */
.section-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.75rem 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
  transition: background-color 0.25s, border-color 0.25s;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.section-title-wrap h3 {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--heading);
  margin-bottom: 0.25rem;
}

.section-title-wrap p {
  font-size: 0.9rem;
  color: var(--ink-2);
}

/* Controls & Filter Bar */
.controls-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.pill-group {
  display: inline-flex;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.25rem;
}

.filter-btn {
  background: transparent;
  border: none;
  color: var(--ink-2);
  padding: 0.4rem 0.85rem;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s ease;
}

.filter-btn:hover {
  color: var(--heading);
}

.filter-btn.active {
  background: var(--accent);
  color: var(--accent-ink);
}

.metric-select, .search-input {
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.metric-select:focus, .search-input:focus {
  border-color: var(--accent);
}

/* Chart Canvas Container */
.chart-container {
  position: relative;
  width: 100%;
  height: 440px;
}

/* ECLSS Calculator */
.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 900px) {
  .calc-grid {
    grid-template-columns: 1fr;
  }
}

.calc-inputs {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.calc-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.calc-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--heading);
  display: flex;
  justify-content: space-between;
}

.calc-label span.value-badge {
  color: var(--accent);
  font-family: var(--mono);
}

.calc-range {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
}

.calc-results {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
}

.calc-kpi-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.calc-kpi-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 1rem;
  text-align: center;
}

.calc-kpi-item .label {
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  font-family: var(--mono);
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.calc-kpi-item .val {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--heading);
  font-family: var(--sans);
}

.calc-insight {
  font-size: 0.85rem;
  color: var(--ink-2);
  background: var(--surface);
  padding: 0.85rem;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent);
}

/* Data Table */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.85rem;
}

table.data-table th {
  background: var(--surface-2);
  color: var(--heading);
  padding: 0.75rem 1rem;
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}

table.data-table th:hover {
  color: var(--accent);
}

table.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  white-space: nowrap;
}

table.data-table tr:hover td {
  background: var(--surface-2);
}

.badge-tag {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--mono);
}

.badge-lettuce { background: rgba(15, 127, 159, 0.12); color: var(--cat-lettuce); border: 1px solid rgba(15, 127, 159, 0.25); }
.badge-leafy-greens { background: rgba(0, 64, 83, 0.12); color: var(--cat-greens); border: 1px solid rgba(0, 64, 83, 0.25); }
.badge-herbs { background: rgba(85, 144, 173, 0.15); color: var(--cat-herbs); border: 1px solid rgba(85, 144, 173, 0.3); }
.badge-fruit-crops { background: rgba(217, 83, 79, 0.12); color: var(--cat-fruit); border: 1px solid rgba(217, 83, 79, 0.25); }
.badge-tuber-crops { background: rgba(230, 126, 34, 0.12); color: var(--cat-tubers); border: 1px solid rgba(230, 126, 34, 0.25); }

/* Buttons */
.btn-group {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid var(--line-strong);
  background: var(--surface-2);
  color: var(--heading);
  font-family: inherit;
}

.btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
}

.btn-primary:hover {
  filter: brightness(1.08);
  color: var(--accent-ink);
}

/* Citation Box */
.citation-box {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--ink-2);
  position: relative;
  overflow-x: auto;
  line-height: 1.5;
}

.copy-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  padding: 0.35rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-family: var(--sans);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Footer */
footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding: 2rem 1.5rem;
  margin-top: 3rem;
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
  transition: background-color 0.25s, border-color 0.25s;
}

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

footer a:hover {
  text-decoration: underline;
}