/* ===========================================
   Components: Forms, Buttons, Loading States
   =========================================== */

/* Search Section */
.search-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-md);
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.search-section:focus-within {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.search-form {
    display: flex;
    gap: 12px;
}

.input-wrapper {
    flex: 1;
    position: relative;
}

.input-wrapper input {
    width: 100%;
    padding: 16px 40px 16px 20px;
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    outline: none;
    transition: border-color var(--transition-normal), background var(--transition-normal);
}

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

.input-wrapper input:focus {
    border-color: var(--accent-primary);
    background: var(--bg-card-hover);
}

/* Clear button */
.btn-clear {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 28px;
    display: none;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    border-radius: 50%;
    transition: color var(--transition-fast), background var(--transition-fast);
    padding: 0;
}

.btn-clear:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

.btn-clear.visible {
    display: flex;
}

.btn-search {
    padding: 16px 28px;
    font-size: 1rem;
    font-weight: 600;
    color: white;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    white-space: nowrap;
    box-shadow: var(--shadow-sm);
}

.btn-search:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), 0 0 20px rgba(99, 102, 241, 0.3);
}

.btn-search:active {
    transform: translateY(0);
}

.btn-search:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Instructions */
.instructions {
    text-align: center;
    padding: 16px 0;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.instructions span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.instructions .step {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: var(--bg-card);
    border-radius: 50%;
    font-size: 0.75rem;
    color: var(--accent-primary);
}

.platforms-hint {
    text-align: center;
    padding: 8px 0 16px;
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Search Hint */
.search-hint {
    text-align: center;
    padding: 10px 0;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Error Message */
.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
    padding: 16px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

.error-message::before {
    content: '!';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: rgba(239, 68, 68, 0.2);
    border-radius: 50%;
    font-weight: bold;
    flex-shrink: 0;
}

/* Loading State (scoped to div containers only, not buttons) */
div.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Button loading state */
.btn-search {
    position: relative;
    min-width: 100px;
}

.btn-search .btn-loader {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    margin: auto;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    opacity: 0;
    animation: spin 0.7s linear infinite;
}

.btn-search .btn-text {
    transition: opacity 0.2s ease;
}

.btn-search.loading .btn-text {
    opacity: 0;
}

.btn-search.loading .btn-loader {
    opacity: 1;
}

.btn-search.loading {
    pointer-events: none;
    opacity: 1;
    transform: none;
    transition: none;
    /* Prevent generic .loading styles from bleeding into the button */
    padding: 16px 28px;
}

/* Full-page loading overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 10, 15, 0.92);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

.loading-content {
    text-align: center;
}

/* Audio bars animation */
.loading-bars {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    height: 60px;
    margin-bottom: 24px;
}

.loading-bars span {
    width: 6px;
    height: 40px;
    background: var(--accent-gradient);
    border-radius: 3px;
    animation: equalizer 1.2s ease-in-out infinite;
}

.loading-bars span:nth-child(1) { animation-delay: 0s; }
.loading-bars span:nth-child(2) { animation-delay: 0.15s; }
.loading-bars span:nth-child(3) { animation-delay: 0.3s; }
.loading-bars span:nth-child(4) { animation-delay: 0.45s; }
.loading-bars span:nth-child(5) { animation-delay: 0.6s; }

.loading-text {
    color: var(--text-secondary);
    font-size: 1rem;
    animation: pulse-text 1.5s ease-in-out infinite;
}

/* Inline stream loader */
.stream-loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 48px 20px 40px;
    animation: trackAppear 0.3s ease-out;
}

.stream-loader__bars {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    height: 40px;
    margin-bottom: 16px;
}

.stream-loader__bars span {
    width: 4px;
    background: var(--accent-gradient);
    border-radius: 2px;
    animation: equalizer 1.2s ease-in-out infinite;
}

.stream-loader__bars span:nth-child(1) { animation-delay: 0s; }
.stream-loader__bars span:nth-child(2) { animation-delay: 0.15s; }
.stream-loader__bars span:nth-child(3) { animation-delay: 0.3s; }
.stream-loader__bars span:nth-child(4) { animation-delay: 0.45s; }
.stream-loader__bars span:nth-child(5) { animation-delay: 0.6s; }

.stream-loader__text {
    color: var(--text-muted);
    font-size: 0.9rem;
    animation: pulse-text 1.5s ease-in-out infinite;
}

/* Error message in form */
.form-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    font-size: 0.9rem;
}