/* ==========================================================
   NEBULEAIR — DESIGN SYSTEM UNIFIÉ
   Version SaaS Premium • Stable • Scalable
   ========================================================== */

/* =======================
   VARIABLES GLOBALES
   ======================= */
:root{
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: rgba(37, 99, 235, 0.08);

  --bg-light: #f8fafc;
  --bg-dark: #0f172a;

  --card-light: #ffffff;
  --card-dark: #1e293b;

  --text-main: #0f172a;
  --text-muted: #64748b;

  --border: #e2e8f0;
  --border-dark: #334155;

  --radius-lg: 16px;
  --radius-md: 10px;

  --shadow-light: 0 4px 20px rgba(0,0,0,0.05);
  --shadow-dark: 0 10px 30px rgba(0,0,0,0.25);

  --topbar-height: 70px;
}

/* =======================
   RESET & BASE
   ======================= */
*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
}

html, body{
  height: 100%;
}

body{
  min-height: 100vh;
  transition: background 0.3s ease, color 0.3s ease;
}

/* Thèmes (ta logique actuelle) */
body.light{
  background: var(--bg-light);
  color: var(--text-main);
}

body.dark{
  background: var(--bg-dark);
  color: #f1f5f9;
}

/* =======================
   TOPBAR (SANCTUARISÉE)
   ======================= */
.topbar{
  position: sticky;
  top: 0;
  z-index: 1000;

  height: var(--topbar-height);
  padding: 0 40px;

  display: flex;
  align-items: center;
  justify-content: space-between;

  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(12px);

  border-bottom: 1px solid var(--border);
}

body.dark .topbar{
  background: rgba(15,23,42,0.85);
  border-bottom-color: var(--border-dark);
}

/* =======================
   NAVIGATION
   ======================= */
.nav-left{
  display: flex;
  align-items: center;
  gap: 40px;
}

.logo{
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
  user-select: none;
}

.nav-links{
  display: flex;
  list-style: none;
  gap: 8px;
}

.nav-links a{
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;

  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: var(--radius-md);

  transition: background 0.2s ease, color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active{
  color: var(--primary);
  background: var(--primary-soft);
}

body.dark .nav-links a{
  color: rgba(241,245,249,0.7);
}

body.dark .nav-links a:hover,
body.dark .nav-links a.active{
  color: #60a5fa;
  background: rgba(96,165,250,0.15);
}

/* =======================
   ACTIONS TOPBAR
   ======================= */
.nav-right{
  display: flex;
  align-items: center;
  gap: 16px;
}

.theme-btn{
  background: none;
  border: none;
  font-size: 18px;
  cursor: pointer;
}

.user-profile{
  font-size: 20px;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.user-profile:hover{
  transform: rotate(20deg) scale(1.2);
}

/* =======================
   STRUCTURE PAGE
   ======================= */
.page-container{
  max-width: 1400px;
  margin: 30px auto;
  padding: 0 24px;
}

/* Titres standards */
.page-title{
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 8px;
}

.page-subtitle{
  color: var(--text-muted);
  margin-bottom: 30px;
  font-size: 14px;
}

/* =======================
   GRILLES
   ======================= */
.dashboard-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

/* =======================
   CARTES
   ======================= */
.card{
  background: var(--card-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-light);

  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover{
  transform: translateY(-2px);
}

body.dark .card{
  background: var(--card-dark);
  border-color: var(--border-dark);
  box-shadow: var(--shadow-dark);
}

.card-label{
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.card-value{
  font-size: 28px;
  font-weight: 800;
  color: var(--text-main);
}

body.dark .card-value{
  color: #ffffff;
}

/* =======================
   BOUTONS
   ======================= */
.btn-primary{
  background: var(--primary);
  color: #ffffff;

  padding: 12px 24px;
  border-radius: var(--radius-md);
  border: none;

  font-weight: 600;
  cursor: pointer;

  transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.btn-primary:hover{
  background: var(--primary-hover);
  box-shadow: 0 8px 15px rgba(37,99,235,0.3);
  transform: translateY(-1px);
}

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

/* Range buttons */
.btn-range{
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card-light);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: background 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.btn-range:hover{
  transform: translateY(-1px);
}

.btn-range.active{
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 4px 10px rgba(37,99,235,0.2);
}

/* Dark mode range buttons */
body.dark .btn-range{
  background: rgba(15,23,42,0.8);
  border-color: var(--border-dark);
  color: rgba(241,245,249,0.85);
}

body.dark .btn-range.active{
  background: #3b82f6;
  border-color: #3b82f6;
  color: #fff;
}

/* =======================
   INPUTS & SELECTS
   ======================= */
select,
input[type="date"],
input[type="number"]{
  width: 100%;
  padding: 10px 16px;

  border-radius: var(--radius-md);
  border: 1px solid var(--border);

  background: var(--card-light);
  color: inherit;

  font-size: 14px;
}

body.dark select,
body.dark input[type="date"],
body.dark input[type="number"]{
  background: #0f172a;
  border-color: var(--border-dark);
  color: #f1f5f9;
}

/* =======================
   UTILITAIRES
   ======================= */
.text-muted{ color: var(--text-muted); }

.center{
  display: flex;
  align-items: center;
  justify-content: center;
}

/* =======================
   NEBULESNAKE — OVERLAY
   ======================= */

/* Overlay plein écran */
#snake-container{
  position: fixed;
  inset: 0;
  z-index: 99999;

  display: flex;
  align-items: center;
  justify-content: center;

  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(6px);
}

/* Caché par défaut (verrouillé) */
#snake-container.snake-hidden{
  display: none !important;
}

/* Panel */
#snake-panel{
  width: min(560px, 92vw);
  max-height: 90vh;
  overflow: auto;

  border-radius: 16px;
  padding: 18px;

  background: var(--card-light);
  border: 1px solid var(--border);
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
  color: var(--text-main);
}

body.dark #snake-panel{
  background: var(--card-dark);
  border-color: var(--border-dark);
  color: #f1f5f9;
}

/* Header snake */
.snake-header{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.snake-header h2{
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.3px;
}

#snake-close{
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  font-size: 22px;
  line-height: 1;
}

body.dark #snake-close{
  border-color: var(--border-dark);
  color: #f1f5f9;
}

#snake-close:hover{
  background: rgba(37,99,235,0.08);
}

/* Texte snake */
.snake-subtitle{
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.45;
}

body.dark .snake-subtitle{
  color: rgba(241,245,249,0.7);
}

/* Canvas */
#snakeCanvas{
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #0b1220;
  margin: 10px 0;
}

body.dark #snakeCanvas{
  border-color: var(--border-dark);
}

/* Score / footer */
.snake-score{
  font-weight: 700;
  margin: 6px 0 10px;
}

.snake-footer{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.snake-speed{
  font-size: 13px;
  color: var(--text-muted);
}

body.dark .snake-speed{
  color: rgba(241,245,249,0.7);
}

.snake-achievements-btn{
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card-light);
  cursor: pointer;
  font-weight: 700;
}

.snake-achievements-btn:hover{
  background: rgba(37,99,235,0.08);
}

body.dark .snake-achievements-btn{
  background: rgba(15,23,42,0.8);
  border-color: var(--border-dark);
  color: #f1f5f9;
}