/* ============================================
   DESIGN MODERNE - INSPIRÉ DE L'IMAGE
   ============================================ */

/* Variables CSS pour les couleurs - Palette originale */
:root {
    /* Palette bleue électrique - Extrait de l'image */
    --blue-deep: #000033;      /* Bleu marine foncé (bords) */
    --blue-dark: #000066;      /* Bleu marine foncé */
    --blue-electric: #0000FF;  /* Bleu électrique vif (cœur des formes) */
    --blue-vivid: #0000CC;     /* Bleu électrique vif */
    --blue-cyan: #00FFFF;      /* Bleu clair/cyan lumineux (points forts) */
    --blue-light: #00CCFF;     /* Bleu clair/cyan */
    --black-deep: #000000;     /* Noir profond */
    
    /* Couleurs d'accent (adaptées pour le contraste) */
    --primary-purple: #8B5CF6;
    --primary-blue: #0066FF;
    --accent-cyan: #00CCFF;
    --accent-pink: #FF00CC;
    
    /* Fond et cartes */
    --dark-bg-start: #000000;
    --dark-bg-end: #000011;
    --card-bg: rgba(0, 0, 20, 0.85);
    --card-border: rgba(0, 204, 255, 0.15);
    --text-primary: #ffffff;
    --text-secondary: #88aaff;
    --text-muted: #4477cc;

    /* Dimensions de la coque de l'application */
    --header-h: 3.75rem;
    --sidebar-w: 280px;
}

html, body {
    font-family: 'Inter', 'Segoe UI', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    /* Deux halos très discrets (fixes) dans la zone de contenu, par-dessus le dégradé de fond */
    background:
        radial-gradient(900px circle at 80% 8%, rgba(0, 102, 255, 0.16), transparent 60%),
        radial-gradient(800px circle at 40% 96%, rgba(0, 204, 255, 0.11), transparent 60%),
        linear-gradient(180deg, var(--dark-bg-start) 0%, var(--dark-bg-end) 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    margin: 0;
    padding: 0;
    position: relative;
    overflow-x: hidden;
}

/* ============================================
   ÉCRAN DE CHARGEMENT (SPLASH)
   ============================================ */

.app-loading {
    position: fixed;
    inset: 0;
    z-index: 100000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    background: radial-gradient(circle at 50% 38%, #051736 0%, #00081c 55%, #000008 100%);
    opacity: 1;
    visibility: visible;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.app-loading--hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.app-loading__spinner {
    position: relative;
    width: 90px;
    height: 90px;
}

.app-loading__spinner::before,
.app-loading__spinner::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    border: 3px solid transparent;
}

.app-loading__spinner::before {
    inset: 0;
    border-top-color: var(--blue-cyan);
    border-right-color: var(--blue-cyan);
    box-shadow: 0 0 25px rgba(0, 204, 255, 0.45);
    animation: app-loading-spin 1s linear infinite;
}

.app-loading__spinner::after {
    inset: 14px;
    border-bottom-color: var(--blue-electric);
    border-left-color: var(--blue-electric);
    box-shadow: 0 0 18px rgba(0, 0, 255, 0.4);
    animation: app-loading-spin 1.5s linear infinite reverse;
}

@keyframes app-loading-spin {
    to { transform: rotate(360deg); }
}

.app-loading__logo {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.4rem;
    font-weight: 900;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    margin-left: 0.35em;
    animation: app-loading-pulse 1.8s ease-in-out infinite;
}

@keyframes app-loading-pulse {
    0%, 100% { opacity: 0.85; filter: drop-shadow(0 0 6px rgba(0, 204, 255, 0.3)); }
    50% { opacity: 1; filter: drop-shadow(0 0 18px rgba(0, 204, 255, 0.7)); }
}

.app-loading__text {
    font-size: 0.85rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.app-loading__dots::after {
    content: '';
    animation: app-loading-dots 1.4s steps(4, end) infinite;
}

@keyframes app-loading-dots {
    0% { content: ''; }
    25% { content: '.'; }
    50% { content: '..'; }
    75% { content: '...'; }
    100% { content: ''; }
}