/* ========================================
   Shadowing App - Reusable Components
   ======================================== */

/* ---- Glass Card ---- */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all var(--transition-base);
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-medium);
    box-shadow: var(--shadow-md);
}

.card--accent {
    border-color: var(--border-accent);
    box-shadow: var(--shadow-glow);
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 12px 24px;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 600;
    line-height: 1;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
}

.btn:active {
    transform: scale(0.97);
}

.btn--primary {
    background: var(--accent-gradient);
    color: var(--text-on-accent);
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn--primary:hover {
    box-shadow: 0 6px 25px rgba(108, 92, 231, 0.5);
    transform: translateY(-1px);
}

.btn--secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}

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

.btn--success {
    background: var(--color-success);
    color: #000;
}

.btn--success:hover {
    box-shadow: 0 4px 15px var(--color-success-glow);
}

.btn--danger {
    background: transparent;
    color: var(--color-danger);
    border: 1px solid rgba(225, 112, 85, 0.3);
}

.btn--danger:hover {
    background: rgba(225, 112, 85, 0.1);
}

.btn--icon {
    padding: 10px;
    border-radius: var(--radius-sm);
}

.btn--lg {
    padding: 16px 32px;
    font-size: var(--font-size-base);
    border-radius: var(--radius-lg);
}

.btn--sm {
    padding: 8px 16px;
    font-size: var(--font-size-xs);
}

.btn--full {
    width: 100%;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

/* ---- Inputs ---- */
.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.input-group label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

.input {
    padding: 12px 16px;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    outline: none;
    transition: all var(--transition-fast);
}

.input:focus {
    background: var(--bg-input-focus);
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

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

textarea.input {
    resize: vertical;
    min-height: 100px;
}

/* ---- Badge ---- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    letter-spacing: 0.03em;
}

.badge--success {
    background: rgba(0, 184, 148, 0.15);
    color: var(--color-success);
}

.badge--warning {
    background: rgba(253, 203, 110, 0.15);
    color: var(--color-warning);
}

.badge--danger {
    background: rgba(225, 112, 85, 0.15);
    color: var(--color-danger);
}

.badge--accent {
    background: rgba(108, 92, 231, 0.15);
    color: var(--accent-secondary);
}

.badge--locked {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
}

/* ---- Progress Bar ---- */
.progress-bar {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar__fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.progress-bar--success .progress-bar__fill {
    background: var(--color-success);
}

/* ---- Score Circle ---- */
.score-circle {
    position: relative;
    width: 120px;
    height: 120px;
}

.score-circle svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.score-circle__bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.06);
    stroke-width: 8;
}

.score-circle__fill {
    fill: none;
    stroke-width: 8;
    stroke-linecap: round;
    transition: stroke-dashoffset 1.5s ease;
}

.score-circle__value {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: var(--font-size-3xl);
    font-weight: 800;
}

/* ---- Modal ---- */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
}

.modal-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    max-width: 520px;
    width: calc(100% - 32px);
    max-height: 85vh;
    overflow-y: auto;
    z-index: var(--z-modal);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-base);
}

.modal.active {
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, -50%) scale(1);
}

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

.modal__title {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.modal__close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 18px;
    transition: all var(--transition-fast);
}

.modal__close:hover {
    background: var(--bg-glass-strong);
    color: var(--text-primary);
}

/* ---- Toast Notification ---- */
.toast-container {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 300px;
    max-width: 450px;
    animation: toastSlideIn var(--transition-spring) forwards;
}

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

.toast__message {
    flex: 1;
    font-size: var(--font-size-sm);
}

.toast__close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    font-size: 16px;
}

/* ---- Skeleton Loader ---- */
.skeleton {
    background: linear-gradient(90deg, var(--bg-glass) 25%, var(--bg-glass-strong) 50%, var(--bg-glass) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

/* ---- Spinner ---- */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.spinner--lg {
    width: 40px;
    height: 40px;
    border-width: 3px;
}

/* ---- Divider ---- */
.divider {
    width: 100%;
    height: 1px;
    background: var(--border-subtle);
    margin: var(--space-lg) 0;
}

/* ---- Empty State ---- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-3xl) var(--space-lg);
    text-align: center;
}

.empty-state__icon {
    font-size: 48px;
    margin-bottom: var(--space-lg);
    opacity: 0.3;
}

.empty-state__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.empty-state__text {
    color: var(--text-muted);
    max-width: 400px;
    margin-bottom: var(--space-lg);
}