/* ==========================================================================
   1. Styles Globaux & Design System
   ========================================================================== */

:root {
    /* Variables par défaut (Thème Clair) */
    --primary-color: #1A253C; /* Bleu nuit profond */
    --secondary-color: #4A90E2; /* Bleu vif pour les accents */
    --accent-color: #65AFFF;  /* Bleu plus clair pour le survol */
    --light-bg: #F7F9FC; /* Gris très clair pour le fond */
    --text-color: #333D47; /* Couleur de texte principale */
    --text-color-muted: #6C757D;
    --card-bg: #FFFFFF;
    --card-shadow: 0 6px 24px rgba(26, 37, 60, 0.05);
    --card-shadow-hover: 0 8px 30px rgba(26, 37, 60, 0.08);
    --border-color: #EAECEF;
    --border-radius: 12px; /* Coins plus arrondis */
    --transition-speed: 0.3s;

    /* Variables pour les polices */
    --font-inter: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-roboto: 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-open-sans: 'Open Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-montserrat: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Police principale dynamique */
    --main-font-family: var(--font-inter);
}

body {
    font-family: var(--main-font-family);
    background-color: var(--light-bg);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

/* Thème Sombre */
body.theme-dark {
    --primary-color: #E0E0E0;
    --secondary-color: #65AFFF;
    --accent-color: #4A90E2;
    --light-bg: #2C2C2C;
    --text-color: #F0F0F0;
    --text-color-muted: #A0A0A0;
    --card-bg: #3A3A3A;
    --card-shadow: 0 6px 24px rgba(0, 0, 0, 0.2);
    --card-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.3);
    --border-color: #4A4A4A;
}

/* Thème Blue */
body.theme-blue {
    --primary-color: #FFFFFF;
    --secondary-color: #007BFF;
    --accent-color: #0056b3;
    --light-bg: #F0F8FF;
    --text-color: #003366;
    --text-color-muted: #6699CC;
    --card-bg: #FFFFFF;
    --card-shadow: 0 4px 8px rgba(0, 123, 255, 0.1);
    --card-shadow-hover: 0 6px 12px rgba(0, 123, 255, 0.15);
    --border-color: #CCE5FF;
}


/* ==========================================================================
   2. Composants de base
   ========================================================================== */

.admin-header {
    background: var(--card-bg);
    color: var(--primary-color);
    padding: 1rem 1.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.02);
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-speed) ease, color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.admin-title {
    font-weight: 700;
    font-size: 1.5rem;
}

.sidebar {
    background: var(--card-bg);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem 0;
    height: 100vh;
    position: sticky;
    top: 0;
    transition: background var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.sidebar .nav-link {
    color: var(--text-color-muted);
    padding: 0.8rem 1.5rem;
    margin: 0.2rem 1rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    transition: all var(--transition-speed) ease;
}

.sidebar .nav-link:hover {
    background-color: var(--light-bg);
    color: var(--secondary-color);
    transform: translateX(4px);
}

.sidebar .nav-link.active {
    background-color: var(--secondary-color);
    color: white;
    font-weight: 600;
}

.sidebar .nav-link i {
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
}

.content-wrapper {
    flex: 1;
    padding: 2.5rem;
}

.page-title {
    font-weight: 700;
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
    transition: color var(--transition-speed) ease;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    transition: all var(--transition-speed) ease;
}

.card:hover {
    box-shadow: var(--card-shadow-hover);
    transform: translateY(-4px);
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--primary-color);
    transition: background-color var(--transition-speed) ease, border-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.back-link {
    color: var(--secondary-color);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    margin-top: 1rem;
    font-weight: 500;
    transition: color var(--transition-speed) ease;
}

.back-link:hover {
    color: var(--accent-color);
}

.back-link i {
    margin-right: 0.5rem;
}

.search-box {
    position: relative;
}

.search-box .form-control {
    padding-left: 40px;
    border-radius: 8px;
    border-color: var(--border-color);
    background-color: var(--card-bg);
    color: var(--text-color);
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.search-box .bi-search {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-color-muted);
    transition: color var(--transition-speed) ease;
}

/* ==========================================================================
   3. Styles par Page
   ========================================================================== */

/* 3.1. Page: Tableau de bord (admin_dashboard.html) */
.stats-container {
    background: transparent;
    padding: 0;
    margin-bottom: 2rem;
    box-shadow: none;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
    transition: all var(--transition-speed) ease;
}

.stat-card:hover {
    box-shadow: var(--card-shadow-hover);
    transform: translateY(-4px);
}

.stat-value {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--primary-color);
    transition: color var(--transition-speed) ease;
}

.stat-label {
    color: var(--text-color-muted);
    font-size: 0.9rem;
    transition: color var(--transition-speed) ease;
}

.admin-card {
    transition: all var(--transition-speed) ease;
}

.card-icon {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    transition: color var(--transition-speed) ease;
}

.chart-container {
    height: 320px;
    margin-bottom: 1.5rem;
}

.recent-activity {
    list-style: none;
    padding: 0;
}

.recent-activity li {
    padding: 1rem 0.5rem;
    border-bottom: 1px solid var(--border-color);
    transition: border-color var(--transition-speed) ease;
}

.recent-activity li:last-child {
    border-bottom: none;
}

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
}

.activity-icon.conversation {
    background-color: #E9F3FE;
    color: #4A90E2;
}

.activity-icon.user {
    background-color: #E5F8ED;
    color: #27AE60;
}

.activity-icon.lead {
    background-color: #FEF3E6;
    color: #F5A623;
}

.activity-time {
    font-size: 0.8rem;
    color: var(--text-color-muted);
    transition: color var(--transition-speed) ease;
}

/* 3.2. Page: Conversations (admin_conversations.html) */
.message-user {
    background-color: var(--secondary-color);
    color: white;
    border-radius: 18px 18px 4px 18px;
    padding: 10px 15px;
    margin-bottom: 10px;
    max-width: 80%;
    align-self: flex-end;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.message-assistant {
    background-color: var(--light-bg);
    color: var(--text-color);
    border-radius: 18px 18px 18px 4px;
    padding: 10px 15px;
    margin-bottom: 10px;
    max-width: 80%;
    align-self: flex-start;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.messages-container {
    max-height: 400px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    padding: 15px;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    transition: background-color var(--transition-speed) ease;
}

/* 3.3. Page: Utilisateurs (admin_users.html) */
.user-avatar {
    width: 48px;
    height: 48px;
    background-color: var(--secondary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 600;
    margin-right: 15px;
    transition: background-color var(--transition-speed) ease;
}

.user-info {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

/* 3.4. Page: Paramètres (admin_settings.html) */
.settings-card .card-header h5 {
    margin: 0;
    color: var(--primary-color);
    font-weight: 600;
    transition: color var(--transition-speed) ease;
}

.settings-card .card-body {
    padding: 25px;
}

.nav-tabs .nav-link {
    color: var(--text-color-muted);
    border: none;
    padding: 10px 20px;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-speed) ease;
}

.nav-tabs .nav-link.active {
    color: var(--secondary-color);
    background-color: transparent;
    border-bottom: 2px solid var(--secondary-color);
    font-weight: 600;
}

.nav-tabs .nav-link:hover:not(.active) {
    color: var(--primary-color);
    border-bottom: 2px solid var(--border-color);
}

/* Primary Button */
.btn-primary {
    background-color: var(--secondary-color); /* Use secondary color for primary action */
    border-color: var(--secondary-color);
    color: white;
    transition: background-color var(--transition-speed) ease, border-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.btn-primary:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

/* Outline Secondary Button */
.btn-outline-secondary {
    color: var(--secondary-color);
    border-color: var(--secondary-color);
    background-color: transparent;
    transition: all var(--transition-speed) ease;
}

.btn-outline-secondary:hover {
    color: white;
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}