/* ── Custom Properties: Terraform Light Palette ─────────────────────────────── */
:root {
  --surface:                  #fbf9f4;
  --surface-dim:              #dbdad5;
  --surface-bright:           #fbf9f4;
  --surface-container-lowest: #ffffff;
  --surface-container-low:    #f5f3ee;
  --surface-container:        #f0eee9;
  --surface-container-high:   #eae8e3;
  --surface-container-highest:#e4e2dd;
  --on-surface:               #1b1c19;
  --on-surface-variant:       #424844;
  --inverse-surface:          #30312e;
  --inverse-on-surface:       #f2f1ec;
  --outline:                  #727973;
  --outline-variant:          #c2c8c2;
  --surface-tint:             #496455;
  --primary:                  #173124;
  --on-primary:               #ffffff;
  --primary-container:        #2d4739;
  --on-primary-container:     #98b5a3;
  --inverse-primary:          #b0cdbb;
  --secondary:                #53643b;
  --on-secondary:             #ffffff;
  --secondary-container:      #d6eab5;
  --on-secondary-container:   #596a40;
  --tertiary:                 #551500;
  --on-tertiary:              #ffffff;
  --tertiary-container:       #732a10;
  --on-tertiary-container:    #fb9270;
  --error:                    #ba1a1a;
  --on-error:                 #ffffff;
  --error-container:          #ffdad6;
  --on-error-container:       #93000a;
  --background:               #fbf9f4;
  --on-background:            #1b1c19;
  --surface-variant:          #e4e2dd;
  --on-primary-fixed:         #062014;
  --on-primary-fixed-variant: #324c3e;
  --primary-fixed:            #ccead6;
  --primary-fixed-dim:        #b0cdbb;
  --secondary-fixed:          #d6eab5;
  --secondary-fixed-dim:      #bacd9b;
  --on-secondary-fixed:       #121f01;
  --on-secondary-fixed-variant:#3c4c25;

  /* ── Typography ── */
  --font-headline: 'Manrope', sans-serif;
  --font-body:     'Work Sans', sans-serif;
  --font-mono:     'JetBrains Mono', monospace;

  /* ── Spacing ── */
  --sidebar-width:    256px;
  --margin-desktop:   64px;
  --margin-mobile:    16px;
  --max-width:        1280px;
  --gutter:           24px;
  --radius-sm:        0.25rem;
  --radius:           0.5rem;
  --radius-md:        0.75rem;
  --radius-lg:        1rem;
  --radius-xl:        1.5rem;
  --radius-full:      9999px;
}

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

html { font-size: 16px; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  background-color: var(--background);
  color: var(--on-surface);
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; }
input, select, textarea { font-family: inherit; }

/* ── Typography Scale ─────────────────────────────────────────────────────── */
.display-lg {
  font-family: var(--font-headline);
  font-size: 48px;
  font-weight: 700;
  line-height: 56px;
  letter-spacing: -0.02em;
}
.headline-md {
  font-family: var(--font-headline);
  font-size: 24px;
  font-weight: 600;
  line-height: 32px;
}
.headline-sm {
  font-family: var(--font-headline);
  font-size: 20px;
  font-weight: 600;
  line-height: 28px;
}
.body-lg  { font-size: 18px; line-height: 28px; }
.body-md  { font-size: 16px; line-height: 24px; }
.label-sm {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  line-height: 16px;
  letter-spacing: 0.05em;
}
.mono {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
}

/* ── App Shell Layout ─────────────────────────────────────────────────────── */
.app-sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background-color: var(--surface-container-low);
  border-right: 1px solid var(--outline-variant);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  z-index: 50;
}

.app-main {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
}

.app-topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(251, 249, 244, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--outline-variant);
}

.app-topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px var(--margin-desktop);
  max-width: var(--max-width);
  margin: 0 auto;
}

.app-content {
  padding: 32px var(--margin-desktop) 48px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.app-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background-color: var(--surface-container-low);
  border-top: 1px solid var(--outline-variant);
  z-index: 50;
}

@media (max-width: 767px) {
  .app-sidebar { display: none; }
  .app-main { margin-left: 0; padding-bottom: 72px; }
  .app-bottom-nav { display: flex; }
  .app-topbar-inner { padding: 12px var(--margin-mobile); }
  .app-content { padding: 20px var(--margin-mobile) 32px; }
}

/* ── Sidebar Nav ──────────────────────────────────────────────────────────── */
.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
  padding: 0 8px;
}

.sidebar-logo-icon {
  width: 32px; height: 32px;
  background-color: var(--primary);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  color: var(--on-primary);
}

.sidebar-logo-name {
  font-family: var(--font-headline);
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius);
  color: var(--on-surface-variant);
  font-size: 15px;
  font-weight: 500;
  transition: background-color 0.15s, color 0.15s;
  margin-bottom: 4px;
}

.nav-item:hover {
  background-color: var(--surface-container-high);
  color: var(--on-surface);
}

.nav-item.active {
  background-color: var(--secondary-container);
  color: var(--on-secondary-container);
  font-weight: 600;
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid var(--outline-variant);
}

/* ── Bottom Tab Bar ───────────────────────────────────────────────────────── */
.bottom-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 0;
  color: var(--on-surface-variant);
  font-size: 11px;
  font-weight: 500;
}
.bottom-nav-item.active { color: var(--primary); }

/* ── Cards ────────────────────────────────────────────────────────────────── */
.card {
  background-color: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.card:hover {
  border-color: var(--primary);
  box-shadow: 0 4px 24px rgba(23, 49, 36, 0.06);
}

.metric-card { display: flex; flex-direction: column; gap: 8px; }
.metric-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--on-surface-variant);
  text-transform: uppercase;
}
.metric-value {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--on-surface);
  line-height: 1;
}
.metric-sub {
  font-size: 13px;
  color: var(--on-surface-variant);
}
.metric-save {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--tertiary);
  margin-top: 2px;
}

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-xl);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  border: none;
  transition: filter 0.15s, box-shadow 0.15s;
  line-height: 1;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background-color: var(--primary);
  color: var(--on-primary);
}
.btn-primary:hover { filter: brightness(1.15); }

.btn-secondary {
  background-color: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-secondary:hover { background-color: var(--primary-fixed); }

.btn-danger {
  background-color: var(--error-container);
  color: var(--on-error-container);
}
.btn-danger:hover { filter: brightness(0.95); }

.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-icon {
  padding: 8px;
  border-radius: var(--radius-full);
  background: transparent;
  border: none;
  color: var(--on-surface-variant);
}
.btn-icon:hover { background-color: var(--surface-container-high); }

/* ── Forms ────────────────────────────────────────────────────────────────── */
.form-field { display: flex; flex-direction: column; gap: 6px; }

.form-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--on-surface-variant);
}

.form-input,
.form-select,
.form-textarea {
  background-color: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 15px;
  color: var(--on-surface);
  transition: border-color 0.15s, box-shadow 0.15s;
  width: 100%;
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(23, 49, 36, 0.08);
}
.form-input.error,
.form-select.error { border-color: var(--error); }

.form-error {
  font-size: 12px;
  color: var(--error);
}

.form-hint {
  font-size: 12px;
  color: var(--on-surface-variant);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 767px) { .form-grid { grid-template-columns: 1fr; } }

/* ── Chips / Status ───────────────────────────────────────────────────────── */
.chip {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 500;
}
.chip-active {
  background-color: var(--secondary-container);
  color: var(--on-secondary-container);
}
.chip-cancelled {
  background-color: var(--surface-container-high);
  color: var(--on-surface-variant);
}
.chip-pending {
  background-color: var(--tertiary-container);
  color: var(--on-tertiary-container);
}

/* ── Tables ───────────────────────────────────────────────────────────────── */
.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  padding: 10px 16px;
  text-align: left;
  border-bottom: 1px solid var(--outline-variant);
}
.data-table td {
  padding: 14px 16px;
  font-size: 14px;
  color: var(--on-surface);
  border-bottom: 1px solid var(--outline-variant);
  vertical-align: middle;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background-color: var(--surface-container-low); }

/* ── Alert / Flash ────────────────────────────────────────────────────────── */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 16px;
}
.alert-error {
  background-color: var(--error-container);
  color: var(--on-error-container);
  border: 1px solid var(--error);
}
.alert-success {
  background-color: var(--secondary-container);
  color: var(--on-secondary-container);
}

/* ── Divider ──────────────────────────────────────────────────────────────── */
.divider { height: 1px; background-color: var(--outline-variant); margin: 24px 0; }

/* ── Dashboard Grid ───────────────────────────────────────────────────────── */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gutter);
  margin-bottom: 32px;
}
@media (max-width: 1024px) { .metrics-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 767px)  { .metrics-grid { grid-template-columns: 1fr 1fr; } }

.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--gutter);
}
@media (max-width: 1024px) { .dashboard-grid { grid-template-columns: 1fr; } }

/* ── SVG Chart ────────────────────────────────────────────────────────── */
.chart-wrap { overflow-x: auto; }
.chart-bar rect { transition: opacity 0.15s; }
.chart-bar:hover rect { opacity: 0.8; }
.chart-stats-row {
  display: flex;
  align-items: center;
  gap: 0;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--outline-variant);
}
.chart-stat {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 16px;
}
.chart-stat:first-child { padding-left: 0; }
.chart-stat-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--on-surface-variant);
}
.chart-stat-value {
  font-size: 15px;
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
  color: var(--on-surface);
}
.chart-stat-divider {
  width: 1px;
  height: 32px;
  background: var(--outline-variant);
  flex-shrink: 0;
}