/* Système de boutons moderne et harmonisé */

/* Variables pour les boutons */
:root {
    --btn-primary-bg: var(--primary-color);
    --btn-primary-hover: var(--primary-light);
    --btn-primary-text: var(--text-light);
    --btn-secondary-bg: var(--background-dark);
    --btn-secondary-hover: var(--background-darker);
    --btn-secondary-text: var(--text-light);
    --btn-danger-bg: #ef4444;
    --btn-danger-hover: #dc2626;
    --btn-danger-text: var(--text-light);
    --btn-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --btn-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
}

/* Style de base pour tous les boutons */
button,
.btn,
input[type="submit"],
input[type="button"],
a.btn,
a.btn-primary,
a.btn-secondary,
a.btn-danger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: none;
    border-radius: 8px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--btn-shadow);
    position: relative;
    overflow: hidden;
}

button:focus,
.btn:focus,
input[type="submit"]:focus,
input[type="button"]:focus,
a.btn:focus,
a.btn-primary:focus,
a.btn-secondary:focus,
a.btn-danger:focus {
    outline: 2px solid var(--primary-light);
    outline-offset: 2px;
}

button:disabled,
.btn:disabled,
input[type="submit"]:disabled,
input[type="button"]:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* Bouton primaire */
.btn-primary,
button.btn-primary,
input[type="submit"].btn-primary,
a.btn-primary {
    background: linear-gradient(135deg, var(--btn-primary-bg) 0%, var(--primary-dark) 100%);
    color: var(--btn-primary-text);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-primary:hover,
button.btn-primary:hover,
input[type="submit"].btn-primary:hover,
a.btn-primary:hover {
    background: linear-gradient(135deg, var(--btn-primary-hover) 0%, var(--btn-primary-bg) 100%);
    transform: translateY(-2px);
    box-shadow: var(--btn-shadow-hover);
    color: var(--btn-primary-text);
    text-decoration: none;
}

.btn-primary:active,
button.btn-primary:active,
input[type="submit"].btn-primary:active,
a.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--btn-shadow);
}

/* Bouton secondaire */
.btn-secondary,
button.btn-secondary,
a.btn-secondary {
    background: var(--btn-secondary-bg);
    color: var(--btn-secondary-text);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover,
button.btn-secondary:hover,
a.btn-secondary:hover {
    background: var(--btn-secondary-hover);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--btn-shadow-hover);
    color: var(--btn-secondary-text);
    text-decoration: none;
}

.btn-secondary:active,
button.btn-secondary:active,
a.btn-secondary:active {
    transform: translateY(0);
    box-shadow: var(--btn-shadow);
}

/* Bouton danger */
.btn-danger,
button.btn-danger,
a.btn-danger {
    background: linear-gradient(135deg, var(--btn-danger-bg) 0%, #dc2626 100%);
    color: var(--btn-danger-text);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-danger:hover,
button.btn-danger:hover,
a.btn-danger:hover {
    background: linear-gradient(135deg, var(--btn-danger-hover) 0%, #b91c1c 100%);
    transform: translateY(-2px);
    box-shadow: var(--btn-shadow-hover);
    color: var(--btn-danger-text);
    text-decoration: none;
}

.btn-danger:active,
button.btn-danger:active,
a.btn-danger:active {
    transform: translateY(0);
    box-shadow: var(--btn-shadow);
}

/* Tailles */
.btn-small,
button.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    border-radius: 6px;
}

.btn-large,
button.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
    border-radius: 10px;
}

/* Bouton plein largeur */
.btn-block,
button.btn-block {
    width: 100%;
    display: flex;
}

/* Bouton avec icône (pour plus tard) */
.btn-icon {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* Effet de brillance au survol */
.btn-primary::before,
.btn-danger::before,
a.btn-primary::before,
a.btn-danger::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before,
.btn-danger:hover::before,
a.btn-primary:hover::before,
a.btn-danger:hover::before {
    left: 100%;
}

/* Animation de chargement (pour plus tard) */
.btn-loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid currentColor;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 0.6s linear infinite;
}

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