/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.7rem 1.6rem;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    line-height: 1.4;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
    letter-spacing: var(--letter-spacing-wide);
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
    box-shadow: none;
}

.btn-primary {
    background-color: var(--color-brand);
    color: #fff;
    border-color: var(--color-brand);
}

.btn-primary:hover {
    background-color: var(--color-brand-dark);
    border-color: var(--color-brand-dark);
    box-shadow: var(--shadow-brand);
}

.btn-secondary {
    background-color: var(--color-heading);
    color: #fff;
    border-color: var(--color-heading);
}

.btn-secondary:hover {
    background-color: #1a1714;
    border-color: #1a1714;
}

.btn-outline {
    background-color: transparent;
    border-color: var(--color-border-dark);
    color: var(--color-text);
}

.btn-outline:hover {
    border-color: var(--color-brand);
    color: var(--color-brand);
    background-color: rgba(194, 112, 62, 0.04);
}

.btn-ghost {
    background-color: transparent;
    border-color: transparent;
    color: var(--color-text-secondary);
}

.btn-ghost:hover {
    color: var(--color-brand);
    background-color: rgba(194, 112, 62, 0.04);
}

.btn-whatsapp {
    background-color: var(--whatsapp-green);
    color: #fff;
    border-color: var(--whatsapp-green);
}

.btn-whatsapp:hover {
    background-color: var(--whatsapp-green-dark);
    border-color: var(--whatsapp-green-dark);
}

.btn-danger {
    background-color: var(--color-danger);
    color: #fff;
    border-color: var(--color-danger);
}

.btn-success {
    background-color: var(--color-success);
    color: #fff;
    border-color: var(--color-success);
}

.btn-sm {
    padding: 0.4rem 1rem;
    font-size: var(--font-size-xs);
    border-radius: var(--radius-sm);
}

.btn-lg {
    padding: 0.9rem 2rem;
    font-size: var(--font-size-base);
    border-radius: var(--radius-lg);
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ── Cards ── */
.card {
    background: var(--color-background);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-card-hover);
}

.card-body {
    padding: var(--spacing-xl);
}

.card-header {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--color-border-light);
}

.card-footer {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid var(--color-border-light);
    background-color: var(--color-surface-alt);
}

/* ── Badges ── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.6rem;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    line-height: 1.3;
    letter-spacing: var(--letter-spacing-wide);
}

.badge-primary { background-color: var(--color-brand); color: #fff; }
.badge-secondary { background-color: var(--color-heading); color: #fff; }
.badge-success { background-color: var(--color-success-light); color: var(--color-success); }
.badge-danger { background-color: var(--color-danger-light); color: var(--color-danger); }
.badge-warning { background-color: var(--color-warning-light); color: var(--color-brand); }
.badge-info { background-color: var(--color-info-light); color: var(--color-info); }
.badge-outline {
    background-color: transparent;
    border: 1px solid var(--color-border-dark);
    color: var(--color-text-secondary);
}

/* ── Alerts ── */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.alert-success { background-color: var(--color-success-light); color: var(--color-success); border: 1px solid rgba(61, 139, 55, 0.2); }
.alert-danger { background-color: var(--color-danger-light); color: var(--color-danger); border: 1px solid rgba(192, 57, 43, 0.2); }
.alert-warning { background-color: var(--color-warning-light); color: var(--color-brand); border: 1px solid rgba(194, 112, 62, 0.2); }
.alert-info { background-color: var(--color-info-light); color: var(--color-info); border: 1px solid rgba(46, 111, 149, 0.2); }

/* ── Modal ── */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background-color: rgba(30, 27, 24, 0.5);
    backdrop-filter: blur(4px);
    z-index: var(--z-modal-backdrop);
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-backdrop.active { display: flex; }

.modal {
    background: var(--color-background);
    border-radius: var(--radius-xl);
    max-width: 500px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    z-index: var(--z-modal);
    box-shadow: var(--shadow-xl);
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-body { padding: var(--spacing-xl); }

.modal-footer {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid var(--color-border-light);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

/* ── Toast ── */
.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    color: #fff;
    z-index: var(--z-toast);
    animation: slideIn 0.3s ease;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

.toast-success { background-color: var(--color-success); }
.toast-error { background-color: var(--color-danger); }
.toast-warning { background-color: var(--color-brand); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ── Skeleton ── */
.skeleton {
    background: linear-gradient(90deg, var(--color-surface-alt) 25%, var(--color-sand) 50%, var(--color-surface-alt) 75%);
    background-size: 200% 100%;
    animation: skeleton 1.5s infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ── Divider ── */
.divider {
    height: 1px;
    background-color: var(--color-border-light);
    border: none;
    margin: var(--spacing-xl) 0;
}

/* ── Visually Hidden (Accessible) ── */
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}