:root {
  --primary: #3b82f6;        /* Electric Blue */
  --primary-dark: #2563eb;
  --sidebar-bg: #0f172a;     /* Deep Navy */
  --sidebar-text: #94a3b8;
  --sidebar-active: #3b82f6;
  --bg: #f8fafc;             /* Very light slate */
  --card-bg: #ffffff;
  --text: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --income: #10b981;
  --expense: #f43f5e;        /* More vibrant rose red */
  --profit: #3b82f6;
  --vacant: #10b981;
  --occupied: #3b82f6;
  --maintenance: #f59e0b;
  --radius: 16px;            /* More modern rounded corners */
  --sidebar-w: 240px;        /* Slightly wider sidebar */
  --tabbar-h: 64px;
}

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

body {
  font-family: 'Pretendard', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* ── LAYOUT ───────────────────────────────── */
.app {
  display: flex;
  min-height: 100vh;
}

/* ── SIDEBAR ────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; bottom: 0; left: 0;
  z-index: 50;
}

.sidebar-logo {
  padding: 24px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.logo-icon { font-size: 22px; }
.logo-text { color: white; font-weight: 700; font-size: 16px; }

.nav-list { list-style: none; padding: 12px 0; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  color: var(--sidebar-text);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  border-left: 3px solid transparent;
}

.nav-item:hover { color: white; background: rgba(255,255,255,0.05); }
.nav-item.active { color: white; border-left-color: var(--sidebar-active); background: rgba(59,130,246,0.12); }
.nav-icon { font-size: 17px; width: 22px; text-align: center; }

/* Admin-only items hidden by default, shown via JS */
.admin-only.hidden { display: none !important; }

/* ── MAIN CONTENT ───────────────────────── */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  padding: 28px;
  max-width: calc(100vw - var(--sidebar-w));
}

/* ── PAGE HEADER ────────────────────────── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.page-header h1 { font-size: 22px; font-weight: 700; }
.page-subtitle { color: var(--text-muted); font-size: 14px; margin-top: 3px; }

/* ── STAT GRID ──────────────────────────── */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.07);
  border-top: 3px solid transparent;
}
.stat-card.income { border-top-color: var(--income); }
.stat-card.expense { border-top-color: var(--expense); }
.stat-card.profit { border-top-color: var(--profit); }
.stat-card.rooms-stat { border-top-color: #8b5cf6; }

.stat-label { font-size: 12px; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.stat-value { font-size: 24px; font-weight: 700; margin-top: 6px; }
.income .stat-value { color: var(--income); }
.expense .stat-value { color: var(--expense); }
.profit .stat-value { color: var(--profit); }
.rooms-stat .stat-value { color: #8b5cf6; }

/* ── CHART GRID ─────────────────────────── */
.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}
.chart-card { padding: 0; }
.chart-container { padding: 16px 20px; height: 280px; position: relative; }
.chart-container canvas { width: 100% !important; height: 100% !important; }
.chart-legend {
  padding: 12px 20px 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  border-top: 1px solid var(--border);
  font-size: 13px;
}
.legend-item { display: flex; align-items: center; gap: 6px; }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; }
.legend-value { font-weight: 700; margin-left: 4px; }


/* ── CARDS ──────────────────────────────── */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(0,0,0,0.07);
  overflow: hidden;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.card-header h2 { font-size: 15px; font-weight: 600; }

/* ── ROOMS GRID ─────────────────────────── */
.rooms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 16px;
}

.room-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.07);
  border-top: 3px solid var(--border);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}
.room-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
.room-card.VACANT { border-top-color: var(--vacant); }
.room-card.OCCUPIED { border-top-color: var(--occupied); }
.room-card.MAINTENANCE { border-top-color: var(--maintenance); }

.room-name { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.room-meta { font-size: 12px; color: var(--text-muted); margin-bottom: 12px; }

.room-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 10px;
}
.badge-VACANT { background:#dcfce7; color:#166534; }
.badge-OCCUPIED { background:#dbeafe; color:#1e40af; }
.badge-MAINTENANCE { background:#fef3c7; color:#92400e; }

.room-rent { font-size: 15px; font-weight: 600; color: var(--text); }
.room-actions { display: flex; gap: 6px; margin-top: 12px; }

/* ── TABLE ──────────────────────────────── */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

table { width: 100%; border-collapse: collapse; font-size: 13px; min-width: 500px; }
th { background: #f8fafc; font-weight: 600; color: var(--text-muted); padding: 12px 16px; text-align: left; white-space: nowrap; }
td { padding: 12px 16px; border-top: 1px solid var(--border); vertical-align: middle; white-space: nowrap; }
tr:hover td { background: #fafafa; }

/* ── NOTIFICATION DROPDOWN ─────────────── */
.notification-dropdown-box {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  width: 320px;
  max-width: calc(100vw - 2rem);
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 4px 20px rgba(0,0,0,0.12);
  padding: 16px;
  z-index: 200;
}

/* ── BADGES ─────────────────────────────── */
.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}
.badge-income { background: #dcfce7; color: #166534; }
.badge-expense { background: #fee2e2; color: #991b1b; }
.badge-SENT { background: #dcfce7; color: #166534; }
.badge-FAILED { background: #fee2e2; color: #991b1b; }
.badge-KAKAO { background: #fef08a; color: #854d0e; }
.badge-SMS { background: #e0e7ff; color: #3730a3; }

/* ── BUTTONS ────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
  font-family: inherit;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg); }
.btn-icon { background: transparent; border: 1px solid var(--border); color: var(--text-muted); padding: 6px 10px; font-size: 14px; border-radius: 6px; cursor: pointer; }
.btn-icon:hover { background: var(--bg); }
.btn-icon.danger:hover { background: #fee2e2; color: var(--expense); border-color: var(--expense); }

/* ── FORMS ──────────────────────────────── */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 12px; font-weight: 600; color: var(--text-muted); margin-bottom: 6px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

input[type="text"], input[type="number"], input[type="date"], input[type="password"], input[type="email"], input[type="tel"], select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: white;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

/* ── TABS ──────────────────────────────── */
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ── MOBILE TAB BAR ─────────────────────── */
.tab-bar { display: none; }

/* ── MODAL ──────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 200;
}
.modal-overlay.hidden { display: none !important; }

.modal-box {
  background: white;
  border-radius: 16px;
  width: 100%;
  max-width: 480px;
  max-height: 92vh;
  overflow-y: auto;
  box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 16px; font-weight: 700; }
.modal-close { background: none; border: none; font-size: 18px; cursor: pointer; color: var(--text-muted); }
.modal-box form { padding: 20px 24px; }
.modal-footer { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border); }

/* ── TOAST ──────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: white;
  z-index: 999;
  background: #1e293b;
  transition: opacity 0.3s;
}
.toast.hidden { opacity: 0; pointer-events: none; }

/* ── LOADER ─────────────────────────────── */
.loader {
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.hidden { display: none !important; }

/* ── RESPONSIVE ─────────────────────────── */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .tab-bar {
    display: flex;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: white;
    border-top: 1px solid var(--border);
    z-index: 100;
    height: var(--tabbar-h);
  }
  .tab-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    background: none;
    border: none;
    font-size: 10px;
    font-family: inherit;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    font-weight: 500;
  }
  .tab-btn > :first-child { font-size: 20px; }
  .tab-btn.active { color: var(--primary); }

  .main-content {
    margin-left: 0;
    max-width: 100%;
    padding: 16px 14px;
    padding-bottom: calc(var(--tabbar-h) + 16px);
  }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .chart-grid { grid-template-columns: 1fr; }
  .stat-value { font-size: 18px; }
  .form-row { grid-template-columns: 1fr; }
  .page-header h1 { font-size: 18px; }

  /* 모바일 알림 드롭다운: 화면 고정 */
  .notification-dropdown-box {
    position: fixed;
    top: 56px;
    right: 12px;
    left: 12px;
    width: auto;
    max-width: none;
    margin-top: 0;
    box-shadow: 0 8px 30px rgba(0,0,0,0.18);
  }

  /* 모바일 테이블 최소 너비 강화 */
  table { min-width: 600px; }
}