/* ===================================
   STYLES GÉNÉRAUX
   =================================== */

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

:root {
    /* Couleurs principales */
    --primary-color: #4A90E2;
    --secondary-color: #50C878;
    --accent-color: #F39C12;
    --danger-color: #E74C3C;
    --success-color: #2ECC71;
    --warning-color: #F39C12;

    /* Couleurs de texte */
    --text-primary: #2C3E50;
    --text-secondary: #7F8C8D;
    --text-light: #ECF0F1;

    /* Couleurs de fond */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --bg-dark: #2C3E50;

    /* Bordures */
    --border-color: #E0E0E0;
    --border-radius: 8px;

    /* Ombres */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.15);

    /* Transitions */
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ===================================
   TYPOGRAPHIE
   =================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
}

/* ===================================
   BOUTONS
   =================================== */

button, .btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #357ABD;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: #45B369;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #C0392B;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

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

/* ===================================
   FORMULAIRES
   =================================== */

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ===================================
   CARTES
   =================================== */

.card {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.card-body {
    padding: 0;
}

/* ===================================
   MESSAGES D'ERREUR ET SUCCÈS
   =================================== */

.error-message {
    background-color: #FADBD8;
    color: var(--danger-color);
    padding: 12px;
    border-radius: var(--border-radius);
    margin-top: 1rem;
    border-left: 4px solid var(--danger-color);
}

.success-message {
    background-color: #D5F4E6;
    color: var(--success-color);
    padding: 12px;
    border-radius: var(--border-radius);
    margin-top: 1rem;
    border-left: 4px solid var(--success-color);
}

.warning-message {
    background-color: #FCF3CF;
    color: #7D6608;
    padding: 12px;
    border-radius: var(--border-radius);
    margin-top: 1rem;
    border-left: 4px solid var(--warning-color);
}

/* ===================================
   SPINNER DE CHARGEMENT
   =================================== */

.loading-spinner {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 1rem 0;
}

.spinner {
    border: 4px solid rgba(74, 144, 226, 0.1);
    border-left-color: var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

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

/* ===================================
   UTILITAIRES
   =================================== */

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

.hidden {
    display: none !important;
}

/* ===================================
   RESPONSIVE
   =================================== */

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }

    .card {
        padding: 1rem;
    }
}