/* CPlayer 5 - Component Library */
/* Reusable UI Components with Unified Design Language */

/* ==================== Buttons ==================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-primary);
    font-weight: var(--font-semibold);
    font-size: var(--text-sm);
    line-height: var(--leading-tight);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
    outline: none;
}

.btn:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Button Variants */
.btn--primary {
    background: var(--primary-color);
    color: var(--on-primary-color);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.btn--primary:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.4);
}

.btn--primary:active {
    transform: scale(0.98);
}

.btn--glass {
    background: var(--surface-container-high-color);
    color: var(--on-surface-color);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: var(--glass-border);
}

.btn--glass:hover {
    background: var(--bg-hover);
    border-color: var(--outline-hover);
}

.btn--icon {
    padding: var(--space-sm);
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.btn--icon-lg {
    width: 64px;
    height: 64px;
    font-size: var(--text-2xl);
}

/* ==================== Cards ==================== */

.card {
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    border: var(--glass-border);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.card--elevated {
    background: var(--bg-elevated);
    box-shadow: var(--shadow-lg);
}

.card--glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
}

.card--interactive {
    cursor: pointer;
}

.card--interactive:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--outline-hover);
}

.card--interactive:active {
    transform: translateY(0);
}

/* ==================== Input Fields ==================== */

.input {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    color: var(--text-primary);
    background: var(--surface-container-color);
    border: 1px solid var(--outline-color);
    border-radius: var(--radius-lg);
    outline: none;
    transition: all var(--transition-fast);
}

.input::placeholder {
    color: var(--text-tertiary);
}

.input:hover {
    border-color: var(--outline-hover);
    background: var(--surface-container-high-color);
}

.input:focus {
    border-color: var(--primary-color);
    background: var(--surface-container-high-color);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.input--error {
    border-color: #ef4444;
}

.input--error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

/* ==================== Loading States ==================== */

.loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
}

.loader__spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--surface-container-high-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loader__spinner--sm {
    width: 24px;
    height: 24px;
    border-width: 2px;
}

.loader__spinner--lg {
    width: 64px;
    height: 64px;
    border-width: 4px;
}

.loader__text {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
}

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

/* Skeleton Loading */
.skeleton {
    background: var(--surface-container-color);
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;
}

.skeleton::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.05),
        transparent
    );
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ==================== Empty States ==================== */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl) var(--space-xl);
    text-align: center;
    min-height: 200px;
}

.empty-state__icon {
    font-size: 48px;
    color: var(--text-tertiary);
    margin-bottom: var(--space-lg);
    opacity: 0.5;
}

.empty-state__title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin: 0 0 var(--space-sm) 0;
}

.empty-state__description {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin: 0;
    max-width: 320px;
}

/* ==================== Toast Notifications ==================== */

.toast {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--surface-container-high-color);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: var(--glass-border);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-toast);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-base);
}

.toast.is-visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.toast__icon {
    font-size: var(--text-lg);
    color: var(--primary-color);
}

.toast__text {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
}

.toast--error .toast__icon {
    color: #ef4444;
}

.toast--success .toast__icon {
    color: #10b981;
}

/* ==================== Modal Dialogs ==================== */

.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal.is-open {
    opacity: 1;
    visibility: visible;
}

.modal__content {
    background: var(--bg-elevated);
    border-radius: var(--radius-2xl);
    padding: var(--space-xl);
    border: var(--glass-border);
    box-shadow: var(--shadow-lg);
    max-width: 90vw;
    max-height: 90vh;
    overflow: auto;
    transform: scale(0.95);
    transition: transform var(--transition-base);
}

.modal.is-open .modal__content {
    transform: scale(1);
}

.modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
}

.modal__title {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin: 0;
}

.modal__close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal__close:hover {
    background: var(--surface-container-high-color);
    color: var(--text-primary);
}

/* ==================== Progress Bar ==================== */

.progress {
    position: relative;
    width: 100%;
    height: 6px;
    background: var(--progress-bar-bg);
    border-radius: var(--radius-full);
    overflow: hidden;
    cursor: pointer;
    transition: height var(--transition-fast);
}

.progress:hover {
    height: 10px;
}

.progress__bar {
    height: 100%;
    background: var(--primary-color);
    border-radius: var(--radius-full);
    box-shadow: 0 0 12px var(--primary-color);
    transition: width 0.1s linear;
}

.progress__thumb {
    position: absolute;
    top: 50%;
    right: 0;
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transform: translate(50%, -50%) scale(0);
    transition: transform var(--transition-fast);
    pointer-events: none;
}

.progress:active .progress__thumb,
.progress:hover .progress__thumb {
    transform: translate(50%, -50%) scale(1);
}

/* ==================== Badge & Tags ==================== */

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 2px 8px;
    font-size: var(--text-xs);
    font-weight: var(--font-bold);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.badge--primary {
    background: var(--primary-color);
    color: var(--on-primary-color);
}

.badge--glass {
    background: var(--surface-container-color);
    color: var(--text-secondary);
    border: 1px solid var(--outline-color);
}

/* Quality Badges (Music Player Specific) */
.quality-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 10px;
    font-weight: var(--font-bold);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.quality-lossless {
    background: linear-gradient(135deg, #ffd700 0%, #ffaa00 100%);
    color: #000;
    box-shadow: 0 0 12px rgba(255, 215, 0, 0.4);
}

.quality-hires {
    background: linear-gradient(135deg, #a855f7 0%, #6366f1 100%);
    color: #fff;
    box-shadow: 0 0 10px rgba(168, 85, 247, 0.4);
}

.quality-high {
    background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
    color: #fff;
}

.quality-standard {
    background: rgba(255, 255, 255, 0.15);
    color: var(--on-surface-color);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* ==================== Utility Classes ==================== */

/* Display */
.hidden { display: none; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

/* Flex Utilities */
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-col { flex-direction: column; }
.flex-1 { flex: 1; }

/* Spacing */
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* Text */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Opacity */
.opacity-50 { opacity: 0.5; }
.opacity-70 { opacity: 0.7; }

/* Transitions */
.transition-all { transition: all var(--transition-base); }
.transition-fast { transition: all var(--transition-fast); }

/* Cursor */
.cursor-pointer { cursor: pointer; }

/* User Select */
.select-none { user-select: none; }