/* ===== COMPOSANT BUTTON BEM ===== */
/* Système de boutons unifié selon méthodologie BEM */

/* === BLOCK PRINCIPAL === */
.c-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--cb-spacing-2, 8px);
    padding: var(--cb-spacing-3, 12px) var(--cb-spacing-4, 16px);
    border: 1px solid transparent;
    border-radius: var(--cb-radius-md, 8px);
    font-family: inherit;
    font-size: var(--cb-font-size-base, 1rem);
    font-weight: var(--cb-font-weight-medium, 500);
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    user-select: none;
    transition: var(--cb-transition-fast, all 0.3s ease);
    position: relative;
    overflow: hidden;
    min-height: 44px;
}

.c-button:focus {
    outline: none;
}

.c-button:focus-visible {
    outline: 2px solid var(--cb-primary, #1976d2);
    outline-offset: 2px;
}

/* === ELEMENTS === */
.c-button__icon {
    font-size: 1.125em;
    line-height: 1;
}

.c-button__text {
    line-height: inherit;
}

.c-button__spinner {
    width: 1em;
    height: 1em;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: c-button-spin 0.75s linear infinite;
}

/* === MODIFIERS - VARIANTS === */
.c-button--primary {
    background: var(--cb-primary, #1976d2);
    color: var(--cb-text-inverse, #ffffff);
    border-color: var(--cb-primary, #1976d2);
}

.c-button--primary:hover:not(:disabled) {
    background: var(--cb-primary-dark, #1565c0);
    border-color: var(--cb-primary-dark, #1565c0);
    transform: translateY(-1px);
    box-shadow: var(--cb-shadow-md, 0 4px 12px rgba(25, 118, 210, 0.3));
}

.c-button--primary:active {
    transform: translateY(0);
    box-shadow: var(--cb-shadow-sm, 0 2px 8px rgba(25, 118, 210, 0.2));
}

.c-button--secondary {
    background: var(--cb-secondary, #6c757d);
    color: var(--cb-text-inverse, #ffffff);
    border-color: var(--cb-secondary, #6c757d);
}

.c-button--secondary:hover:not(:disabled) {
    background: var(--cb-secondary-dark, #5a6268);
    border-color: var(--cb-secondary-dark, #5a6268);
    transform: translateY(-1px);
}

.c-button--success {
    background: var(--cb-success, #28a745);
    color: var(--cb-text-inverse, #ffffff);
    border-color: var(--cb-success, #28a745);
}

.c-button--success:hover:not(:disabled) {
    background: var(--cb-success-dark, #218838);
    border-color: var(--cb-success-dark, #218838);
    transform: translateY(-1px);
}

.c-button--danger {
    background: var(--cb-danger, #dc3545);
    color: var(--cb-text-inverse, #ffffff);
    border-color: var(--cb-danger, #dc3545);
}

.c-button--danger:hover:not(:disabled) {
    background: var(--cb-danger-dark, #c82333);
    border-color: var(--cb-danger-dark, #c82333);
    transform: translateY(-1px);
}

.c-button--warning {
    background: var(--cb-warning, #ffc107);
    color: var(--cb-text-primary, #333);
    border-color: var(--cb-warning, #ffc107);
}

.c-button--warning:hover:not(:disabled) {
    background: var(--cb-warning-dark, #e0a800);
    border-color: var(--cb-warning-dark, #e0a800);
    transform: translateY(-1px);
}

.c-button--info {
    background: var(--cb-info, #17a2b8);
    color: var(--cb-text-inverse, #ffffff);
    border-color: var(--cb-info, #17a2b8);
}

.c-button--info:hover:not(:disabled) {
    background: var(--cb-info-dark, #138496);
    border-color: var(--cb-info-dark, #138496);
    transform: translateY(-1px);
}

/* === MODIFIERS - OUTLINE === */
.c-button--outline {
    background: transparent;
    color: var(--cb-primary, #1976d2);
    border-color: var(--cb-primary, #1976d2);
}

.c-button--outline:hover:not(:disabled) {
    background: var(--cb-primary, #1976d2);
    color: var(--cb-text-inverse, #ffffff);
}

.c-button--outline-secondary {
    background: transparent;
    color: var(--cb-secondary, #6c757d);
    border-color: var(--cb-secondary, #6c757d);
}

.c-button--outline-secondary:hover:not(:disabled) {
    background: var(--cb-secondary, #6c757d);
    color: var(--cb-text-inverse, #ffffff);
}

.c-button--outline-success {
    background: transparent;
    color: var(--cb-success, #28a745);
    border-color: var(--cb-success, #28a745);
}

.c-button--outline-success:hover:not(:disabled) {
    background: var(--cb-success, #28a745);
    color: var(--cb-text-inverse, #ffffff);
}

.c-button--outline-danger {
    background: transparent;
    color: var(--cb-danger, #dc3545);
    border-color: var(--cb-danger, #dc3545);
}

.c-button--outline-danger:hover:not(:disabled) {
    background: var(--cb-danger, #dc3545);
    color: var(--cb-text-inverse, #ffffff);
}

/* === MODIFIERS - GHOST === */
.c-button--ghost {
    background: transparent;
    color: var(--cb-primary, #1976d2);
    border: none;
}

.c-button--ghost:hover:not(:disabled) {
    background: rgba(var(--cb-primary-rgb, 25, 118, 210), 0.1);
}

/* === MODIFIERS - TAILLES === */
.c-button--small {
    padding: var(--cb-spacing-1, 4px) var(--cb-spacing-2, 8px);
    font-size: var(--cb-font-size-sm, 0.875rem);
    min-height: 32px;
}

.c-button--large {
    padding: var(--cb-spacing-4, 16px) var(--cb-spacing-5, 20px);
    font-size: var(--cb-font-size-lg, 1.125rem);
    min-height: 52px;
}

.c-button--extra-large {
    padding: var(--cb-spacing-5, 20px) var(--cb-spacing-6, 24px);
    font-size: var(--cb-font-size-xl, 1.25rem);
    min-height: 60px;
}

/* === MODIFIERS - FORME === */
.c-button--rounded {
    border-radius: var(--cb-radius-full, 50px);
}

.c-button--square {
    border-radius: 0;
}

.c-button--circle {
    border-radius: 50%;
    width: 44px;
    height: 44px;
    padding: 0;
}

.c-button--circle.c-button--small {
    width: 32px;
    height: 32px;
}

.c-button--circle.c-button--large {
    width: 52px;
    height: 52px;
}

/* === MODIFIERS - WIDTH === */
.c-button--full-width {
    width: 100%;
}

.c-button--auto-width {
    width: auto;
}

/* === MODIFIERS - ÉTATS === */
.c-button--loading {
    pointer-events: none;
    color: transparent;
}

.c-button--loading .c-button__spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: currentColor;
}

.c-button:disabled,
.c-button--disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* === ANIMATIONS === */
@keyframes c-button-spin {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.c-button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.c-button:hover::before {
    transform: translateX(100%);
}

/* === GROUPES DE BOUTONS === */
.c-button-group {
    display: inline-flex;
    vertical-align: middle;
}

.c-button-group .c-button:not(:first-child) {
    margin-left: -1px;
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.c-button-group .c-button:not(:last-child) {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.c-button-group .c-button:hover {
    z-index: 1;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .c-button {
        min-height: 48px;
        padding: var(--cb-spacing-3, 12px) var(--cb-spacing-4, 16px);
    }
    
    .c-button--small {
        min-height: 40px;
    }
    
    .c-button--large {
        min-height: 56px;
    }
}

/* === ACCESSIBILITÉ === */
@media (prefers-reduced-motion: reduce) {
    .c-button {
        transition: none;
        animation: none;
    }
    
    .c-button:hover,
    .c-button:active {
        transform: none;
    }
    
    .c-button::before {
        display: none;
    }
}

/* === HIGH CONTRAST === */
@media (prefers-contrast: high) {
    .c-button {
        border-width: 2px;
    }

    .c-button:focus-visible {
        outline-width: 3px;
    }
}

/* === CTA BUTTON === */
/* Bouton d'appel à l'action utilisé dans les headers */
.c-cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    background: #5ba3d9;
    color: white;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(91, 163, 217, 0.3);
    transition: all 0.3s ease;
    cursor: pointer;
    outline: none;
}

.c-cta-button:hover {
    background: #4a92c8;
    color: white;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(91, 163, 217, 0.4);
    outline: none;
}

.c-cta-button:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(91, 163, 217, 0.3);
}

.c-cta-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.c-cta-button:disabled:hover {
    transform: none;
    box-shadow: none;
}