/* ═══════════════════════════════════════════════════════════════
   Modern Design System 2025 (VM)
   - Auto Dark Mode
   - Glassmorphism & Subtle Gradients
   - Smooth Micro-interactions
   - Premium Typography
   ═══════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────
   1) Design Tokens
   ───────────────────────────────────────────────────────────────── */
:root {
  /* Colors - Light */
  --vm-bg: #f8fafc;
  --vm-bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #f1f5f9 100%);
  --vm-surface: #ffffff;
  --vm-surface-elevated: #ffffff;
  --vm-text: #0f172a;
  --vm-text-secondary: #475569;
  --vm-muted: #64748b;
  --vm-border: rgba(15, 23, 42, 0.08);
  --vm-border-strong: rgba(15, 23, 42, 0.12);

  /* Shadows */
  --vm-shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --vm-shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --vm-shadow: 0 4px 16px rgba(15, 23, 42, 0.08), 0 2px 4px rgba(15, 23, 42, 0.04);
  --vm-shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12), 0 4px 12px rgba(15, 23, 42, 0.06);
  --vm-shadow-xl: 0 24px 64px rgba(15, 23, 42, 0.16), 0 8px 24px rgba(15, 23, 42, 0.08);

  /* Primary */
  --vm-primary: #3b82f6;
  --vm-primary-hover: #2563eb;
  --vm-primary-active: #1d4ed8;
  --vm-primary-subtle: rgba(59, 130, 246, 0.08);
  --vm-primary-glow: rgba(59, 130, 246, 0.25);

  /* Accent */
  --vm-success: #10b981;
  --vm-warning: #f59e0b;
  --vm-error: #ef4444;

  /* Glass */
  --vm-glass: rgba(255, 255, 255, 0.7);
  --vm-glass-border: rgba(255, 255, 255, 0.5);
  --vm-glass-blur: 16px;

  /* Focus ring */
  --vm-ring: 0 0 0 3px var(--vm-primary-glow);
  --vm-ring-offset: 0 0 0 2px var(--vm-surface);

  /* Radius */
  --vm-radius-sm: 8px;
  --vm-radius: 12px;
  --vm-radius-lg: 16px;
  --vm-radius-xl: 20px;
  --vm-radius-full: 9999px;

  /* Transitions */
  --vm-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --vm-transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─────────────────────────────────────────────────────────────────
   2) Dark Mode (auto)
   ───────────────────────────────────────────────────────────────── */
@media (prefers-color-scheme: dark) {
  :root {
    --vm-bg: #0c0f17;
    --vm-bg-gradient: linear-gradient(135deg, #0c0f17 0%, #1a1f2e 50%, #0f1219 100%);
    --vm-surface: #1a1f2e;
    --vm-surface-elevated: #242938;
    --vm-text: #f1f5f9;
    --vm-text-secondary: #94a3b8;
    --vm-muted: #64748b;
    --vm-border: rgba(241, 245, 249, 0.08);
    --vm-border-strong: rgba(241, 245, 249, 0.12);

    --vm-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
    --vm-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25), 0 1px 2px rgba(0, 0, 0, 0.15);
    --vm-shadow: 0 4px 16px rgba(0, 0, 0, 0.3), 0 2px 4px rgba(0, 0, 0, 0.2);
    --vm-shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.4), 0 4px 12px rgba(0, 0, 0, 0.25);
    --vm-shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.5), 0 8px 24px rgba(0, 0, 0, 0.3);

    --vm-primary: #60a5fa;
    --vm-primary-hover: #3b82f6;
    --vm-primary-active: #2563eb;
    --vm-primary-subtle: rgba(96, 165, 250, 0.12);
    --vm-primary-glow: rgba(96, 165, 250, 0.3);

    --vm-glass: rgba(26, 31, 46, 0.8);
    --vm-glass-border: rgba(255, 255, 255, 0.08);
  }
}

/* ─────────────────────────────────────────────────────────────────
   3) Base
   ───────────────────────────────────────────────────────────────── */
html {
  font-size: 16px;
  scroll-behavior: smooth;
}

*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: "Pretendard Variable", Pretendard, system-ui, -apple-system, BlinkMacSystemFont,
               "Segoe UI", Roboto, "Noto Sans KR", "Malgun Gothic", sans-serif;
  color: var(--vm-text);
  background: var(--vm-bg);
  background-image: var(--vm-bg-gradient);
  background-attachment: fixed;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, var(--vm-primary-subtle) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 40% 80%, rgba(6, 182, 212, 0.05) 0%, transparent 40%);
  pointer-events: none;
  z-index: -1;
}

a {
  color: var(--vm-primary);
  text-decoration: none;
  transition: color var(--vm-transition-fast);
}

a:hover { color: var(--vm-primary-hover); }

::selection {
  background: var(--vm-primary-subtle);
  color: var(--vm-primary-active);
}

/* ─────────────────────────────────────────────────────────────────
   4) Layout
   ───────────────────────────────────────────────────────────────── */
.app-body {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.app-main {
  flex: 1 1 auto;
  padding: 1.5rem 0 3rem;
  animation: fadeInUp 0.5s ease-out;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.app-footer {
  border-top: 1px solid var(--vm-border);
  background: var(--vm-glass);
  backdrop-filter: blur(var(--vm-glass-blur));
  -webkit-backdrop-filter: blur(var(--vm-glass-blur));
  padding: 1.25rem 0;
  color: var(--vm-muted);
  font-size: 0.875rem;
}

/* ─────────────────────────────────────────────────────────────────
   5) Header / Navbar
   ───────────────────────────────────────────────────────────────── */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(var(--vm-glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--vm-glass-blur)) saturate(180%);
  background: var(--vm-glass);
  border-bottom: 1px solid var(--vm-glass-border);
  transition: box-shadow var(--vm-transition);
}

.app-header.is-scrolled { box-shadow: var(--vm-shadow-sm); }

.app-navbar { background: transparent !important; }

.navbar-brand {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--vm-text) 0%, var(--vm-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar .nav-link {
  color: var(--vm-text-secondary) !important;
  font-weight: 500;
  transition: color var(--vm-transition-fast), background var(--vm-transition-fast);
}

.navbar .nav-link:hover { color: var(--vm-text) !important; }

.vm-nav .nav-link {
  border-radius: var(--vm-radius-full);
  padding: 0.5rem 1rem;
  margin-right: 0.25rem;
  position: relative;
  overflow: hidden;
}

.vm-nav .nav-link::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--vm-primary-subtle);
  opacity: 0;
  transition: opacity var(--vm-transition-fast);
}

.vm-nav .nav-link:hover::before { opacity: 1; }

.vm-nav .nav-link.active {
  background: var(--vm-primary-subtle);
  color: var(--vm-primary) !important;
  font-weight: 600;
}

.vm-nav .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  background: var(--vm-primary);
  border-radius: 50%;
}

.vm-userbtn {
  border-radius: var(--vm-radius-full);
  padding: 0.5rem 1rem;
  background: var(--vm-surface);
  border: 1px solid var(--vm-border);
  box-shadow: var(--vm-shadow-xs);
  transition: all var(--vm-transition-fast);
}

.vm-userbtn:hover {
  box-shadow: var(--vm-shadow-sm);
  border-color: var(--vm-border-strong);
}

/* ─────────────────────────────────────────────────────────────────
   6) Focus (A11y)
   ───────────────────────────────────────────────────────────────── */
.btn:focus-visible,
.form-control:focus-visible,
.form-check-input:focus-visible,
.form-select:focus-visible {
  outline: none;
  box-shadow: var(--vm-ring-offset), var(--vm-ring);
}

/* Bootstrap fallback focus */
.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus, .form-select:focus {
  box-shadow: var(--vm-ring-offset), var(--vm-ring);
}

/* ─────────────────────────────────────────────────────────────────
   7) Surfaces & Cards
   ───────────────────────────────────────────────────────────────── */
.card, .alert, .modal-content {
  border-color: var(--vm-border);
  border-radius: var(--vm-radius-lg);
}

.vm-surface {
  background: var(--vm-surface);
  border: 1px solid var(--vm-border);
  border-radius: var(--vm-radius-lg);
  box-shadow: var(--vm-shadow);
  transition: box-shadow var(--vm-transition), border-color var(--vm-transition);
}

.vm-surface:hover { box-shadow: var(--vm-shadow-lg); }

.vm-surface-sm {
  background: var(--vm-surface);
  border: 1px solid var(--vm-border);
  border-radius: var(--vm-radius);
  box-shadow: var(--vm-shadow-sm);
}

/* Page Header */
.vm-page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.vm-page-header .vm-title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--vm-text) 0%, var(--vm-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.vm-page-header .vm-subtitle {
  margin: 0.375rem 0 0;
  color: var(--vm-muted);
  font-size: 0.9375rem;
}

/* ─────────────────────────────────────────────────────────────────
   8) Tables
   ───────────────────────────────────────────────────────────────── */
.table {
  background: var(--vm-surface);
  border: 1px solid var(--vm-border);
  border-radius: var(--vm-radius-lg);
  overflow: hidden;
  border-collapse: separate;
  border-spacing: 0;
}

.table > :not(caption) > * > * {
  border-bottom: 1px solid var(--vm-border);
  padding: 1rem 1.25rem;
  transition: background var(--vm-transition-fast);
}

.table > tbody > tr:hover > * { background: var(--vm-primary-subtle); }
.table > tbody > tr:last-child > * { border-bottom: none; }

.table thead th {
  font-size: 0.8125rem;
  color: var(--vm-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--vm-surface-elevated);
  border-bottom: 1px solid var(--vm-border-strong);
}

/* ─────────────────────────────────────────────────────────────────
   9) Buttons
   ───────────────────────────────────────────────────────────────── */
.btn {
  border-radius: var(--vm-radius);
  font-weight: 500;
  padding: 0.625rem 1.25rem;
  transition: all var(--vm-transition-fast);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.12) 0%, transparent 100%);
  opacity: 0;
  transition: opacity var(--vm-transition-fast);
}

.btn:hover::before { opacity: 1; }
.btn:active { transform: scale(0.98); }

.btn-primary {
  background: linear-gradient(135deg, var(--vm-primary) 0%, var(--vm-primary-hover) 100%);
  border: none;
  box-shadow: 0 2px 8px var(--vm-primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--vm-primary-hover) 0%, var(--vm-primary-active) 100%);
  box-shadow: 0 4px 16px var(--vm-primary-glow);
  transform: translateY(-1px);
}

.btn-primary:active { transform: translateY(0) scale(0.98); }

.btn-outline-secondary {
  border: 1px solid var(--vm-border);
  background: var(--vm-surface);
  color: var(--vm-text-secondary);
}

.btn-outline-secondary:hover {
  background: var(--vm-surface-elevated);
  border-color: var(--vm-border-strong);
  color: var(--vm-text);
}

/* ─────────────────────────────────────────────────────────────────
   10) Form Controls
   ───────────────────────────────────────────────────────────────── */
.form-control, .form-select {
  border-radius: var(--vm-radius);
  border: 1px solid var(--vm-border);
  background: var(--vm-surface);
  color: var(--vm-text);
  padding: 0.75rem 1rem;
  transition: all var(--vm-transition-fast);
}

.form-control:hover, .form-select:hover { border-color: var(--vm-border-strong); }
.form-control:focus, .form-select:focus { border-color: var(--vm-primary); }
.form-control::placeholder { color: var(--vm-muted); }

/* ─────────────────────────────────────────────────────────────────
   11) Dashboard Cards
   ───────────────────────────────────────────────────────────────── */
.vm-parking-card {
  background: var(--vm-surface);
  border: 1px solid var(--vm-border);
  border-radius: var(--vm-radius-xl);
  padding: 1rem;
  box-shadow: var(--vm-shadow-sm);
  transition: all var(--vm-transition);
  min-height: 140px;
  position: relative;
  overflow: hidden;
}

.vm-parking-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--vm-primary-subtle), transparent);
  opacity: 0;
  transition: opacity var(--vm-transition);
}

.vm-parking-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--vm-shadow-lg);
  border-color: var(--vm-primary-subtle);
}

.vm-parking-card:hover::before { opacity: 1; }

.vm-parking-card.is-occupied {
  background: linear-gradient(180deg, var(--vm-primary-subtle) 0%, var(--vm-surface) 100%);
  border-color: rgba(59, 130, 246, 0.15);
}

.vm-parking-card.is-occupied::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--vm-primary), var(--vm-primary-hover));
}

.vm-badge-floor {
  background: var(--vm-surface-elevated);
  color: var(--vm-text-secondary);
  font-weight: 600;
  font-size: 0.75rem;
  padding: 0.25rem 0.625rem;
  border-radius: var(--vm-radius-full);
  border: 1px solid var(--vm-border);
}

.vm-parking-plate {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--vm-text);
}

.vm-parking-sub {
  font-size: 0.8125rem;
  color: var(--vm-muted);
  min-height: 1.2em;
}

.vm-parking-model {
  margin-top: 0.15rem;
  font-size: 0.875rem;
  color: var(--vm-text-secondary);
}

.vm-stat {
  border: 1px solid var(--vm-border);
  border-radius: var(--vm-radius);
  padding: 0.75rem 1rem;
  background: var(--vm-surface);
  transition: all var(--vm-transition-fast);
}

.vm-stat:hover { background: var(--vm-surface-elevated); }

.vm-stat-label {
  font-size: 0.75rem;
  color: var(--vm-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.vm-stat-value {
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--vm-text);
}

/* ─────────────────────────────────────────────────────────────────
   12) Mobile Responsive (mobile-first)
   ───────────────────────────────────────────────────────────────── */
@media (max-width: 767.98px) {
  /* 모바일 기본 가독성/터치 UX */
  html { font-size: 22px !important; }

  .btn, .form-control, .form-select, .navbar .nav-link, .dropdown-item {
    min-height: 48px;
    display: inline-flex;
    align-items: center;
  }

  .vm-page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .vm-page-header > .d-flex {
    flex-wrap: wrap;
    width: 100%;
    gap: 0.5rem;
  }

  .vm-page-header .vm-title { font-size: 1.25rem; }

  .table { font-size: 0.95rem; }
  .table > :not(caption) > * > * { padding: 0.875rem 1rem; }

  .vm-parking-card { padding: 0.875rem; min-height: 120px; }
  .vm-parking-plate { font-size: 1rem; }
  .vm-parking-sub { font-size: 0.85rem; }
  .vm-stat-label { font-size: 0.85rem; }
  .vm-stat-value { font-size: 1.25rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}