:root {
  /* --- Thème & Couleurs --- */
  --color-primary: #5a77ff; /* Bleu plus vif */
  --color-accent: #00e0b3; /* Vert d'accentuation plus lumineux */
  --color-background: #0d1226; /* Fond très sombre */
  --color-card-background: #141935; /* Carte légèrement plus claire */
  --color-topbar-background: #0f132a;
  --color-border: #24294b;
  --color-input-background: #0a0e20;
  --color-text-light: #e6eaf0;
  --color-text-muted: rgba(230, 234, 240, 0.7);

  /* --- Espacements & Formes --- */
  --spacing-xs: 6px;
  --spacing-sm: 10px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 16px;

  /* --- Ombres & Effets --- */
  --box-shadow-card: 0 8px 30px rgba(0, 0, 0, 0.3);
  --box-shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.45);
  --box-shadow-button-hover: 0 6px 20px rgba(79, 109, 255, 0.6);
}

/* --- Base --- */

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

body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Helvetica Neue, Arial, sans-serif;
  background: var(--color-background);
  color: var(--color-text-light);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2 {
  color: var(--color-primary);
  margin-top: 0;
  line-height: 1.2;
}

h1 {
  margin-bottom: var(--spacing-xs);
  font-size: 2rem;
  font-weight: 700;
}

h2 {
  font-size: 1.6rem;
}

p.subtitle {
  margin: 0;
  opacity: 0.8;
}

/* --- Layout Principal --- */
.container {
  max-width: 1000px;
  margin: var(--spacing-lg) auto;
  padding: 0 var(--spacing-md);
  flex-grow: 1;
}

.topbar {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-topbar-background);
}

.card {
  background: var(--color-card-background);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--box-shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  will-change: transform, box-shadow;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--box-shadow-card-hover);
}

/* --- Formulaires & Inputs --- */
.row {
  display: grid;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-muted);
}

input {
  width: 100%;
  padding: 12px var(--spacing-md);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-input-background);
  color: var(--color-text-light);
  font-size: 1rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}

input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(86, 97, 179, 0.25);
}

/* --- Boutons --- */
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

button {
  flex-grow: 1;
  padding: 12px 20px;
  border-radius: var(--border-radius-md);
  border: none;
  background: linear-gradient(135deg, var(--color-primary), #6a85ff);
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
  will-change: transform, box-shadow;
}

button:hover {
  transform: translateY(-3px);
  box-shadow: var(--box-shadow-button-hover);
}

/* --- Liste des pièces --- */
.room-grid, #rooms .room-row {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr 0.5fr;
  gap: var(--spacing-sm);
  align-items: center;
}

.header-row {
  font-weight: 600;
  opacity: 0.85;
  padding: 8px 0;
  border-bottom: 1px dashed var(--color-border);
  color: var(--color-text-muted);
}

#rooms .room-row {
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid transparent;
}

#rooms .room-row:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-sm);
}

/* --- Résultats --- */
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-md);
}

.result {
  background: var(--color-input-background);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: 1rem;
}

.result .label {
  opacity: 0.7;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.result .value {
  font-weight: 700;
  font-size: 1.8rem;
  margin-top: var(--spacing-xs);
  color: var(--color-accent);
}

/* --- Pied de page --- */
.footer {
  text-align: center;
  padding: 20px;
  background: var(--color-topbar-background);
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  opacity: 0.7;
  margin-top: auto;
}

/* --- Responsivité --- */
@media (max-width: 768px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .room-grid, #rooms .room-row, .results-grid {
    grid-template-columns: 1fr;
  }
}