/* ============================================
   Base styles: Reset, Utilities, Layout
   ============================================ */

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

/* Utility classes */
.d-none { display: none !important; }
.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: 0.5rem; }
.mb-md { margin-bottom: 0.75rem; }
.mt-sm { margin-top: 0.5rem; }
.mt-md { margin-top: 1rem; }
.mt-lg { margin-top: 1.5rem; }

/* Body */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ============================================
   Navbar
   ============================================ */
.navbar {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 1.5rem;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}
.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}
.navbar-brand:hover { color: var(--primary-light); }
.navbar-brand svg { flex-shrink: 0; }
.navbar-info { font-size: 0.85rem; color: var(--text-secondary); }
.navbar-nav { display: flex; gap: 0.25rem; list-style: none; }
.navbar-nav a {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.4rem 0.75rem;
    border-radius: var(--radius);
    transition: color 0.2s, background 0.2s;
}
.navbar-nav a svg { flex-shrink: 0; opacity: 0.7; transition: opacity 0.2s; }
.navbar-nav a:hover svg, .navbar-nav a.active svg { opacity: 1; }
.navbar-nav a:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}
.navbar-nav a.active {
    color: var(--primary-light);
    background: rgba(96, 165, 250, 0.1);
}
.navbar-separator {
    width: 1px;
    height: 24px;
    background: var(--border-color);
    margin: 0 0.25rem;
    align-self: center;
}
.navbar-user {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.navbar-username {
    font-size: 0.82rem;
    color: var(--text-muted);
    font-weight: 500;
}
.navbar-credits {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
}
.navbar-credits svg { flex-shrink: 0; opacity: 0.7; }
.navbar-credits strong { color: var(--text-primary); font-weight: 700; }
/* Solde épuisé : on signale visuellement le blocage. */
.navbar-credits.is-empty {
    color: var(--danger);
    background: rgba(248, 113, 113, 0.12);
}
.navbar-credits.is-empty svg { opacity: 1; }
.navbar-credits.is-empty strong { color: var(--danger); }
.navbar-logout {
    display: flex;
    align-items: center;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.35rem;
    border-radius: var(--radius);
    transition: color 0.2s, background 0.2s;
}
.navbar-logout:hover {
    color: var(--danger);
    background: rgba(248, 113, 113, 0.1);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem;
}

/* Grid */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

/* ============================================
   Loading overlay
   ============================================ */
.loading-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15,23,42,.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}
.loading-overlay.active { display: flex; }
.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--bg-secondary);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Skeleton loading */
.skeleton {
    background: linear-gradient(90deg, var(--bg-secondary) 25%, #3d4f66 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius);
}
@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}
.skeleton-chart { height: 400px; }
.skeleton-table { height: 300px; }
.skeleton-text { height: 1rem; margin-bottom: 0.5rem; width: 80%; }

/* Responsive */
@media (max-width: 768px) {
    .grid-2 { grid-template-columns: 1fr; }
    .container { padding: 0.75rem; }
    .navbar { padding: 0 0.75rem; }
    .navbar-brand { font-size: 1.05rem; }
    .navbar-nav a { padding: 0.4rem 0.55rem; }
    /* liens de nav en icônes seules, identité réduite au bouton de déconnexion */
    .nav-label { display: none; }
    .navbar-username { display: none; }
    .navbar-credits { padding: 0.3rem 0.5rem; }
}

/* ============================================
   Custom scrollbar (apply via .styled-scroll)
   ============================================ */
.styled-scroll::-webkit-scrollbar { width: 8px; height: 8px; }
.styled-scroll::-webkit-scrollbar-track { background: transparent; }
.styled-scroll::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 3px;
}
.styled-scroll::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,.35); }
.styled-scroll::-webkit-scrollbar-thumb:active { background: rgba(255,255,255,.5); }
@-moz-document url-prefix() {
    .styled-scroll {
        scrollbar-width: thin;
        scrollbar-color: var(--bg-tertiary) transparent;
    }
}