/* ============================================================
   AIoT Monitor Pro — style.css
   Theme: Premium Dark Blue (Option C)
   ============================================================ */

/* ── 변수 ── */
:root {
  --bg-base:       #0d1b2a;
  --bg-surface:    #112240;
  --bg-elevated:   #162d4a;
  --bg-hover:      #1a3558;

  --accent-gold:   #f59e0b;
  --accent-ice:    #38bdf8;
  --accent-teal:   #0ea5e9;
  --accent-purple: #818cf8;
  --accent-red:    #ef4444;
  --accent-green:  #10b981;

  --text-primary:  #e2e8f0;
  --text-secondary:#94a3b8;
  --text-muted:    #4a6fa5;

  --border:        #1e3a5f;
  --border-light:  #243f6a;

  --sidebar-w:     240px;
  --topbar-h:      60px;

  --radius:        10px;
  --radius-sm:     6px;

  --shadow:        0 4px 24px rgba(0,0,0,0.4);
  --shadow-sm:     0 2px 8px rgba(0,0,0,0.3);
  --glow-gold:     0 0 20px rgba(245,158,11,0.3);
  --glow-ice:      0 0 20px rgba(56,189,248,0.3);
}

/* ── 리셋 ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; }
body {
  font-family: 'Inter', 'Noto Sans KR', sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
canvas { display: block; }

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
  width: var(--sidebar-w);
  min-height: 100vh;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  z-index: 200;
  transition: transform 0.3s ease;
}

.sidebar__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border);
}
.sidebar__logo-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--accent-gold), #d97706);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--glow-gold);
}
.sidebar__logo-icon svg { width: 18px; height: 18px; stroke: #0d1b2a; }
.sidebar__brand { display: block; font-weight: 700; font-size: 1rem; color: var(--text-primary); }
.sidebar__sub { display: block; font-size: 0.75rem; color: var(--text-secondary); }

.sidebar__nav { flex: 1; padding: 16px 12px; overflow-y: auto; }
.sidebar__section-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
  padding: 12px 8px 6px;
}
.sidebar__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 400;
  transition: all 0.2s;
  position: relative;
  margin-bottom: 2px;
}
.sidebar__link svg { width: 16px; height: 16px; flex-shrink: 0; }
.sidebar__link:hover { background: var(--bg-hover); color: var(--text-primary); }
.sidebar__link.is-active {
  background: rgba(245,158,11,0.12);
  color: var(--accent-gold);
  font-weight: 500;
}
.sidebar__link.is-active::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 60%;
  background: var(--accent-gold);
  border-radius: 0 2px 2px 0;
}
.sidebar__badge {
  margin-left: auto;
  background: var(--accent-red);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 10px;
}
.sidebar__new {
  margin-left: auto;
  background: linear-gradient(135deg, var(--accent-gold), #d97706);
  color: #0d1b2a;
  font-size: 0.6rem;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 4px;
}

.sidebar__footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.sidebar__status { display: flex; align-items: center; gap: 6px; font-size: 0.75rem; color: var(--text-secondary); }
.sidebar__status-dot {
  width: 7px; height: 7px;
  background: var(--accent-green);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
.sidebar__version { font-size: 0.7rem; color: var(--text-muted); }

/* ============================================================
   MAIN WRAPPER
   ============================================================ */
.main-wrapper {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ============================================================
   TOPBAR
   ============================================================ */
.topbar {
  height: var(--topbar-h);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  position: sticky;
  top: 0;
  z-index: 100;
  gap: 12px;
}
.topbar__left { display: flex; align-items: center; gap: 12px; }
.topbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 6px;
}
.topbar__hamburger span {
  display: block;
  width: 18px; height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.3s;
}
.topbar__breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}
.topbar__breadcrumb svg { width: 14px; height: 14px; }
.topbar__page { color: var(--text-primary); font-weight: 500; }

.topbar__center { display: flex; flex-direction: column; align-items: center; }
.topbar__clock {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--accent-ice);
  letter-spacing: 0.05em;
}
.topbar__date { font-size: 0.7rem; color: var(--text-secondary); }

.topbar__right { display: flex; align-items: center; gap: 12px; }
.topbar__connection {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  padding: 5px 10px;
  border-radius: 20px;
  border: 1px solid var(--border);
}
.topbar__conn-dot {
  width: 7px; height: 7px;
  background: var(--accent-green);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
.topbar__conn-count { color: var(--accent-ice); font-weight: 600; }

.topbar__btn {
  width: 34px; height: 34px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  transition: all 0.2s;
  position: relative;
}
.topbar__btn svg { width: 16px; height: 16px; }
.topbar__btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.topbar__alert-badge {
  position: absolute;
  top: -4px; right: -4px;
  background: var(--accent-red);
  color: #fff;
  font-size: 0.6rem;
  font-weight: 700;
  width: 16px; height: 16px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}

/* ============================================================
   CONTENT
   ============================================================ */
.content {
  flex: 1;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-bottom: 60px;
}

/* ============================================================
   ALERT BANNER
   ============================================================ */
.alert-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid;
  font-size: 0.85rem;
}
.alert-banner--warning {
  background: rgba(245,158,11,0.08);
  border-color: rgba(245,158,11,0.4);
  color: var(--text-primary);
}
.alert-banner--warning svg { width: 18px; height: 18px; color: var(--accent-gold); flex-shrink: 0; }
.alert-banner__text { flex: 1; }
.alert-banner__text strong { color: var(--accent-gold); }
.alert-banner__time { font-size: 0.75rem; color: var(--text-secondary); white-space: nowrap; }
.alert-banner__close {
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 2px 6px;
  border-radius: 4px;
  transition: color 0.2s;
}
.alert-banner__close:hover { color: var(--text-primary); }

/* ============================================================
   KPI GRID
   ============================================================ */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
}

.kpi-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: all 0.2s;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.kpi-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-ice), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.kpi-card:hover { border-color: var(--border-light); transform: translateY(-2px); box-shadow: var(--shadow); }
.kpi-card:hover::before { opacity: 1; }

.kpi-card__header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.kpi-card__icon {
  width: 32px; height: 32px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
}
.kpi-card__icon svg { width: 16px; height: 16px; }
.kpi-card__icon--blue   { background: rgba(56,189,248,0.15); color: var(--accent-ice); }
.kpi-card__icon--amber  { background: rgba(245,158,11,0.15); color: var(--accent-gold); }
.kpi-card__icon--teal   { background: rgba(14,165,233,0.15); color: var(--accent-teal); }
.kpi-card__icon--purple { background: rgba(129,140,248,0.15); color: var(--accent-purple); }
.kpi-card__icon--red    { background: rgba(239,68,68,0.15); color: var(--accent-red); }

.kpi-card__status {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 10px;
}
.kpi-card__status--normal  { background: rgba(16,185,129,0.15); color: var(--accent-green); }
.kpi-card__status--warning { background: rgba(245,158,11,0.15); color: var(--accent-gold); }
.kpi-card__status--danger  { background: rgba(239,68,68,0.15); color: var(--accent-red); }

.kpi-card__value {
  font-size: 1.7rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 2px;
}
.kpi-card__unit { font-size: 0.7rem; color: var(--text-secondary); margin-bottom: 4px; }
.kpi-card__label { font-size: 0.8rem; font-weight: 500; color: var(--text-primary); margin-bottom: 2px; }
.kpi-card__range { font-size: 0.65rem; color: var(--text-muted); margin-bottom: 8px; }
.kpi-card__spark { height: 36px; margin-bottom: 6px; }
.kpi-card__spark canvas { width: 100% !important; height: 36px !important; }

.kpi-card__delta { font-size: 0.7rem; font-weight: 600; }
.kpi-card__delta--up   { color: var(--accent-red); }
.kpi-card__delta--down { color: var(--accent-green); }

/* ============================================================
   CHART GRID
   ============================================================ */
.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 16px;
}
.chart-card--wide { grid-column: 1 / -1; }

.chart-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.chart-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 8px;
}
.chart-card__title {
  display: flex;
  align-items: center;
  gap: 8px;
}
.chart-card__title h3 { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); }
.chart-card__title-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent-ice);
  animation: pulse 2s infinite;
}
.chart-card__title-dot--amber  { background: var(--accent-gold); }
.chart-card__title-dot--teal   { background: var(--accent-teal); }
.chart-card__title-dot--red    { background: var(--accent-red); }

.chart-card__live-badge {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--accent-red);
  animation: blink 1.2s infinite;
}
.chart-card__ai-badge {
  font-size: 0.65rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-gold), #d97706);
  color: #0d1b2a;
  padding: 1px 6px;
  border-radius: 4px;
}
.chart-card__subtitle { font-size: 0.75rem; color: var(--text-secondary); }
.chart-card__controls { display: flex; gap: 4px; }

.chart-btn {
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  transition: all 0.2s;
}
.chart-btn:hover { color: var(--text-primary); border-color: var(--border-light); }
.chart-btn--active { background: rgba(245,158,11,0.15); color: var(--accent-gold); border-color: rgba(245,158,11,0.4); }

.chart-card__body { padding: 16px; position: relative; }
.chart-card__body canvas { width: 100% !important; }
.chart-card--wide .chart-card__body { height: 240px; }
.chart-card:not(.chart-card--wide) .chart-card__body { height: 220px; }

.sensor-map-body { padding: 12px; }
.sensor-map { width: 100%; height: auto; display: block; }

/* 센서 배치도 카드는 고정 높이 해제 — SVG 비율에 맞게 자동 확장 */
.chart-card--map .chart-card__body {
  height: auto !important;
  padding: 12px;
}

.chart-card__footer {
  padding: 10px 18px;
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
}
.prediction-info {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}
.prediction-info svg { width: 14px; height: 14px; color: var(--accent-ice); }
.prediction-info strong { color: var(--accent-ice); }

/* ── 센서 맵 애니메이션 ── */
.pulse-dot { animation: pulse-scale 2s infinite; }
@keyframes pulse-scale {
  0%, 100% { opacity: 1; r: 6; }
  50% { opacity: 0.5; r: 8; }
}

/* ============================================================
   AI PANEL
   ============================================================ */
.ai-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.ai-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(245,158,11,0.05), transparent);
  flex-wrap: wrap;
  gap: 12px;
}
.ai-panel__title { display: flex; align-items: center; gap: 12px; }
.ai-panel__icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--accent-gold), #d97706);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--glow-gold);
}
.ai-panel__icon svg { width: 20px; height: 20px; stroke: #0d1b2a; }
.ai-panel__title h3 { font-size: 0.95rem; font-weight: 600; color: var(--text-primary); }
.ai-panel__title p { font-size: 0.75rem; color: var(--text-secondary); margin-top: 2px; }

.ai-panel__actions { display: flex; align-items: center; gap: 10px; }
.ai-panel__select {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.8rem;
  padding: 6px 10px;
  font-family: inherit;
}
.ai-panel__btn {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 18px;
  background: linear-gradient(135deg, var(--accent-gold), #d97706);
  color: #0d1b2a;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
  box-shadow: var(--glow-gold);
}
.ai-panel__btn svg { width: 14px; height: 14px; }
.ai-panel__btn:hover { transform: translateY(-1px); box-shadow: 0 0 30px rgba(245,158,11,0.5); }
.ai-panel__btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.ai-panel__output {
  padding: 20px;
  min-height: 140px;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--text-primary);
  position: relative;
}
.ai-panel__placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 100px;
  color: var(--text-muted);
  text-align: center;
}
.ai-panel__placeholder svg { width: 32px; height: 32px; opacity: 0.4; }
.ai-panel__placeholder p { font-size: 0.8rem; line-height: 1.6; }

.ai-output-text { white-space: pre-wrap; }
.ai-cursor {
  display: inline-block;
  width: 2px; height: 1em;
  background: var(--accent-gold);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 0.8s infinite;
}
.ai-loading {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.8rem;
}
.ai-loading-dots { display: flex; gap: 4px; }
.ai-loading-dots span {
  width: 6px; height: 6px;
  background: var(--accent-gold);
  border-radius: 50%;
  animation: dot-bounce 1.4s infinite;
}
.ai-loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.ai-loading-dots span:nth-child(3) { animation-delay: 0.4s; }

/* ============================================================
   TABLE CARD
   ============================================================ */
.table-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.table-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}
.table-card__title { display: flex; align-items: center; gap: 8px; }
.table-card__title h3 { font-size: 0.9rem; font-weight: 600; }

.table-wrapper { overflow-x: auto; }
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  min-width: 600px;
}
.data-table thead tr { background: var(--bg-elevated); }
.data-table th {
  padding: 10px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}
.data-table td {
  padding: 11px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
  white-space: nowrap;
}
.data-table tbody tr:hover { background: var(--bg-hover); }
.data-table tbody tr:last-child td { border-bottom: none; }
.mono { font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; }
.val-warning { color: var(--accent-gold); font-weight: 600; }
.val-danger  { color: var(--accent-red); font-weight: 600; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.7rem;
  font-weight: 600;
}
.badge--warning  { background: rgba(245,158,11,0.15); color: var(--accent-gold); }
.badge--resolved { background: rgba(16,185,129,0.15); color: var(--accent-green); }
.badge--danger   { background: rgba(239,68,68,0.15); color: var(--accent-red); }
.badge--info     { background: rgba(56,189,248,0.15); color: var(--accent-ice); }

/* ============================================================
   DEMO BANNER
   ============================================================ */
.demo-banner {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: rgba(13,27,42,0.95);
  border-top: 1px solid var(--border);
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-secondary);
  z-index: 300;
  backdrop-filter: blur(10px);
}
.demo-banner strong { color: var(--accent-gold); }
.demo-banner__link {
  color: var(--accent-ice);
  font-weight: 500;
  transition: color 0.2s;
}
.demo-banner__link:hover { color: var(--accent-gold); }

/* ============================================================
   SIDEBAR OVERLAY (모바일)
   ============================================================ */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 150;
  backdrop-filter: blur(2px);
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}
@keyframes dot-bounce {
  0%, 80%, 100% { transform: scale(0.8); opacity: 0.5; }
  40% { transform: scale(1.2); opacity: 1; }
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   MOBILE RESPONSIVE
   ============================================================ */

/* ── 전역 가로 넘침 방지 ── */
html, body {
  max-width: 100%;
  overflow-x: hidden;
}

@media (max-width: 1280px) {
  .kpi-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 1024px) {
  :root { --sidebar-w: 0px; }
  .sidebar {
    transform: translateX(-240px);
    width: 240px;
  }
  .sidebar.is-open { transform: translateX(0); }
  .sidebar-overlay.is-open { display: block; }
  .main-wrapper { margin-left: 0; }
  .topbar__hamburger { display: flex; }
  .topbar__center { display: none; }
  .chart-grid { grid-template-columns: 1fr; }
  .chart-card--wide { grid-column: 1; }
}

@media (max-width: 768px) {
  .content { padding: 12px; gap: 14px; }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .kpi-card__value { font-size: 1.4rem; }
  .topbar__connection { display: none; }
  .topbar { padding: 0 12px; gap: 8px; }
  .topbar__breadcrumb { font-size: 0.72rem; }
  /* 알림 배너 모바일 대응 */
  .alert-banner {
    flex-wrap: wrap;
    gap: 8px;
    padding: 10px 12px;
    font-size: 0.78rem;
  }
  .alert-banner__time { display: none; }
  .alert-banner__close { margin-left: auto; }
  /* AI 패널 */
  .ai-panel__header { flex-direction: column; align-items: flex-start; gap: 10px; }
  .ai-panel__actions { width: 100%; flex-wrap: wrap; }
  .ai-panel__btn { flex: 1; justify-content: center; min-width: 120px; }
  .ai-panel__select { flex: 1; }
  /* 데모 배너 */
  .demo-banner { flex-direction: column; gap: 4px; text-align: center; padding: 8px 12px; font-size: 0.72rem; }
  /* 테이블 카드 헤더 */
  .table-card__header { flex-wrap: wrap; gap: 8px; }
  /* 차트 카드 헤더 */
  .chart-card__header { padding: 10px 12px; }
  .chart-card__controls { flex-wrap: wrap; gap: 3px; }
  .chart-btn { padding: 3px 7px; font-size: 0.7rem; }
  /* 차트 높이 축소 */
  .chart-card--wide .chart-card__body { height: 200px; }
  .chart-card:not(.chart-card--wide) .chart-card__body { height: 180px; }
}

@media (max-width: 480px) {
  /* KPI 카드 */
  .kpi-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .kpi-card { padding: 10px; }
  .kpi-card__value { font-size: 1.2rem; }
  .kpi-card__range { display: none; }
  .kpi-card__spark { height: 28px; }
  .kpi-card__spark canvas { height: 28px !important; }
  /* 탑바 */
  .topbar { padding: 0 10px; height: 52px; }
  .topbar__breadcrumb > span:first-child { display: none; }
  .topbar__breadcrumb svg { display: none; }
  /* 알림 배너 */
  .alert-banner { font-size: 0.75rem; }
  /* 테이블 */
  .data-table { min-width: 480px; font-size: 0.75rem; }
  .data-table th, .data-table td { padding: 8px 10px; }
  /* AI 패널 */
  .ai-panel__header { padding: 12px; }
  .ai-panel__output { padding: 14px; font-size: 0.8rem; }
  /* 차트 높이 */
  .chart-card--wide .chart-card__body { height: 170px; }
  .chart-card:not(.chart-card--wide) .chart-card__body { height: 160px; }
  /* 데모 배너 */
  .demo-banner { font-size: 0.68rem; }
}