/* ===================================================================
   Admin Dashboard — Core Layout & Structure
   Variables, reset, shell, hero, tabs, control strip, summary grid,
   dashboard grid, panels, chart containers, responsive breakpoints
   =================================================================== */

:root {
  --bg: #f4efe6;
  --bg-strong: #efe5d4;
  --panel: rgba(255, 252, 246, 0.9);
  --panel-border: rgba(74, 60, 46, 0.12);
  --text: #231b14;
  --muted: #655548;
  --subtle: #8e7966;
  --accent: #0b7a62;
  --accent-soft: rgba(11, 122, 98, 0.14);
  --danger: #b64040;
  --danger-soft: rgba(182, 64, 64, 0.12);
  --warn: #ab6b08;
  --warn-soft: rgba(171, 107, 8, 0.12);
  --shadow: 0 18px 48px rgba(43, 29, 16, 0.08);
  --color-primary: #C2714F;
  --color-primary-soft: rgba(194, 113, 79, 0.14);
  --color-secondary: #D4956E;
  --color-success: #16A34A;
  --color-success-soft: rgba(22, 163, 74, 0.12);
  --color-error: #DC2626;
  --color-error-soft: rgba(220, 38, 38, 0.10);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(11, 122, 98, 0.08), transparent 32%),
    radial-gradient(circle at top right, rgba(189, 140, 73, 0.12), transparent 28%),
    linear-gradient(180deg, #f8f4ec 0%, var(--bg) 100%);
  font-family: "IBM Plex Sans KR", system-ui, sans-serif;
}

body {
  padding: 32px 18px 48px;
}

.admin-shell {
  width: min(1240px, 100%);
  margin: 0 auto;
}

/* ===== Hero ===== */

.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.eyebrow,
.panel-kicker {
  margin: 0 0 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
}

.hero h1,
.panel h2 {
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.02;
}

.hero-subtitle {
  margin: 14px 0 0;
  max-width: 720px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  align-items: flex-start;
}

.ghost-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.48);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}

.ghost-link:hover {
  background: rgba(255, 255, 255, 0.7);
}

/* ===== Tab Navigation ===== */

.tab-nav {
  display: flex;
  gap: 6px;
  padding: 6px;
  margin-bottom: 16px;
  border-radius: 18px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-btn {
  appearance: none;
  border: 0;
  border-radius: 14px;
  padding: 12px 20px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: background-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.tab-btn:hover {
  background: rgba(11, 122, 98, 0.06);
  color: var(--text);
}

.tab-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.tab-btn.is-active {
  background: var(--accent);
  color: #fbfffd;
}

.tab-panel.is-hidden {
  display: none;
}

/* ===== Control Strip ===== */

.control-strip,
.status-card,
.panel,
.summary-card {
  border: 1px solid var(--panel-border);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.control-strip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding: 18px 20px;
  border-radius: 22px;
  flex-wrap: wrap;
}

.period-filter {
  display: inline-flex;
  gap: 10px;
  flex-wrap: wrap;
}

.period-chip {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 11px 16px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--text);
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  transition: transform 160ms ease, background-color 160ms ease, color 160ms ease;
}

.period-chip:hover {
  transform: translateY(-1px);
}

.period-chip.is-active {
  background: var(--accent);
  color: #fbfffd;
}

.meta-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--subtle);
  font-size: 14px;
}

.meta-divider {
  opacity: 0.45;
}

/* ===== Status Card ===== */

.status-card {
  margin-top: 18px;
  padding: 16px 18px;
  border-radius: 18px;
  color: var(--muted);
}

.status-card--loading {
  background: linear-gradient(90deg, rgba(255, 252, 246, 0.8), rgba(255, 255, 255, 0.95), rgba(255, 252, 246, 0.8));
}

.status-card--error {
  border-color: rgba(182, 64, 64, 0.22);
  background: var(--danger-soft);
  color: #6c2121;
}

.status-card--warn {
  border-color: rgba(171, 107, 8, 0.24);
  background: var(--warn-soft);
  color: #6d4300;
}

.status-card--success {
  border-color: rgba(11, 122, 98, 0.22);
  background: var(--accent-soft);
  color: #0d5747;
}

/* ===== Summary Grid ===== */

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.summary-grid--six {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.summary-card {
  border-radius: 20px;
  padding: 18px;
  min-height: 150px;
}

.summary-label {
  margin: 0;
  color: var(--subtle);
  font-size: 13px;
  font-weight: 600;
}

.summary-value {
  margin: 12px 0 8px;
  font-size: clamp(22px, 2.6vw, 34px);
  font-weight: 700;
  letter-spacing: -0.04em;
}

.summary-detail {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
  font-size: 14px;
}

/* ===== Dashboard Grid ===== */

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.panel {
  grid-column: span 4;
  padding: 20px;
  border-radius: 24px;
}

.panel--wide {
  grid-column: span 8;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 16px;
}

.panel-note {
  margin: 0;
  color: var(--subtle);
  font-size: 13px;
}

/* ===== Chart Containers ===== */

.chart-container {
  position: relative;
  width: 100%;
  min-height: 240px;
}

.chart-container--wide {
  min-height: 280px;
}

.chart-container--doughnut {
  max-width: 320px;
  margin: 0 auto;
  min-height: 280px;
}

.chart-container canvas {
  width: 100% !important;
  height: 100% !important;
}

/* ===== Empty & Helper ===== */

.empty-state {
  padding: 24px 0;
  color: var(--subtle);
  text-align: center;
}

.helper-actions {
  margin-top: 14px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.helper-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 10px 14px;
  text-decoration: none;
  font-weight: 600;
}

.helper-link--solid {
  background: var(--text);
  color: #fffdf9;
}

.helper-link--ghost {
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid var(--panel-border);
  color: var(--text);
}

/* ===== Responsive ===== */

@media (max-width: 1080px) {
  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .summary-grid--six {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .panel,
  .panel--wide {
    grid-column: span 12;
  }
}

@media (max-width: 720px) {
  body {
    padding: 20px 14px 36px;
  }

  .hero,
  .control-strip,
  .panel-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .tab-nav {
    gap: 4px;
    padding: 4px;
  }

  .tab-btn {
    padding: 10px 14px;
    font-size: 14px;
  }

  .summary-grid,
  .summary-grid--six {
    grid-template-columns: 1fr;
  }

  .chart-container--doughnut {
    max-width: 100%;
  }
}