/**
 * RoburFitness Custom Styles
 * Behavioural / utility styles that sit on top of theme.css.
 * All colours come from the design tokens defined in theme.css.
 */

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Skeleton Loaders */
.skeleton {
    background: linear-gradient(90deg,
        var(--bg-subtle) 25%,
        #eceef1 50%,
        var(--bg-subtle) 75%
    );
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

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

.skeleton-text {
    height: 1em;
    margin-bottom: 0.5em;
}

.skeleton-title {
    height: 1.5em;
    width: 60%;
    margin-bottom: 1em;
}

/* Focus States */
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 2px;
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 14px 18px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    color: var(--text);
    font-size: 0.875rem;
    z-index: 10000;
    transform: translateX(400px);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    max-width: 400px;
}

.toast.show {
    transform: translateX(0);
    opacity: 1;
}

.toast-success { border-left: 3px solid var(--success); }
.toast-error   { border-left: 3px solid var(--danger); }
.toast-warning { border-left: 3px solid var(--warning); }
.toast-info    { border-left: 3px solid var(--info); }

/* Responsive Images */
img {
    max-width: 100%;
    height: auto;
}

/* Line clamping */
.line-clamp-1,
.line-clamp-2,
.line-clamp-3 {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.line-clamp-1 { -webkit-line-clamp: 1; }
.line-clamp-2 { -webkit-line-clamp: 2; }
.line-clamp-3 { -webkit-line-clamp: 3; }

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-subtle);
}

::-webkit-scrollbar-thumb {
    background: #d1d5db;
    border-radius: 5px;
    border: 2px solid var(--bg-subtle);
}

::-webkit-scrollbar-thumb:hover {
    background: #9ca3af;
}

/* Mobile Optimizations */
@media (max-width: 640px) {
    .toast {
        bottom: 10px;
        right: 10px;
        left: 10px;
        max-width: none;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}