/**
 * YouTube Ringtone Module - Styles
 *
 * Design system tokens from /public/assets/css/main.css
 * Pink accent, Stone neutrals, Inter font
 */

/* ==========================================================================
   App Container
   ========================================================================== */

.youtube-ringtone-app {
    min-height: calc(100vh - 200px);
}

/* Prevent double-tap zoom on all interactive elements */
.youtube-ringtone-app button,
.youtube-ringtone-app input,
.youtube-ringtone-app a,
.youtube-ringtone-app .ytr-stepper-btn,
.youtube-ringtone-app .gl-btn,
.youtube-ringtone-app .download-btn,
.youtube-ringtone-app .format-card {
    touch-action: manipulation;
}

/* ==========================================================================
   Step Badges
   ========================================================================== */

.step-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full);
    background: var(--primary);
    color: #fff;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    margin-right: var(--space-2);
    transition: all var(--duration-slow) var(--ease);
}

.step-badge.completed {
    background: var(--success);
}

.step-badge.completed .step-number {
    display: none;
}

.step-badge.completed .step-check {
    display: inline !important;
}

.step-badge .step-check {
    font-size: 0.75rem;
}

/* ==========================================================================
   Waveform Container
   ========================================================================== */

.waveform-container {
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 100%);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    min-height: 150px;
    position: relative;
    overflow: hidden;
}

.waveform-container ::part(region-handle) {
    width: 6px !important;
    background: rgba(255, 255, 255, 0.8) !important;
    border-radius: 3px;
}

/* ==========================================================================
   Time Inputs (Desktop)
   ========================================================================== */

.ytr-time-inputs-desktop {
    display: flex;
    align-items: end;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.ytr-time-inputs-desktop .ytr-time-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.ytr-time-inputs-desktop .ytr-time-label {
    font-size: var(--text-xs);
    color: var(--gray-500);
    font-weight: var(--font-medium);
}

.time-input {
    width: 80px;
    text-align: center;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    background: #fff;
    color: var(--gray-900);
    transition: border-color var(--duration-fast) var(--ease), box-shadow var(--duration-fast) var(--ease);
}

.time-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 129, 0.15);
}

.time-input[readonly] {
    background: var(--gray-100);
    color: var(--gray-600);
}

.ytr-time-actions {
    display: flex;
    gap: var(--space-2);
    margin-left: auto;
}

/* ==========================================================================
   Mobile Time Sliders
   ========================================================================== */

.ytr-time-sliders {
    display: none;
    flex-direction: column;
    gap: var(--space-5);
    padding: var(--space-4) 0;
}

.ytr-slider-row {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.ytr-slider-row label {
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.ytr-slider-control {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    justify-content: center;
}

.ytr-stepper-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    border: 1px solid var(--gray-300);
    background: #fff;
    color: var(--gray-600);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease);
    flex-shrink: 0;
    -webkit-tap-highlight-color: transparent;
}

.ytr-stepper-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--pink-50);
}

.ytr-stepper-btn:active {
    transform: scale(0.95);
    background: var(--pink-100);
}

.ytr-time-chip {
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--gray-900);
    background: var(--gray-100);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    min-width: 72px;
    text-align: center;
}

.ytr-duration-chip {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--pink-50);
    border: 1px solid var(--pink-200);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--pink-500);
}

.ytr-duration-chip i {
    font-size: var(--text-xs);
}

/* Range slider styling */
.ytr-time-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--gray-200);
    border-radius: var(--radius-full);
    outline: none;
    transition: background var(--duration-fast) var(--ease);
}

.ytr-time-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    background: var(--primary);
    cursor: pointer;
    border: 3px solid #fff;
    box-shadow: var(--shadow-md);
    transition: transform var(--duration-fast) var(--ease), box-shadow var(--duration-fast) var(--ease);
}

.ytr-time-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: var(--shadow-lg);
}

.ytr-time-slider::-webkit-slider-thumb:active {
    transform: scale(1.1);
    box-shadow: 0 0 0 6px rgba(255, 107, 129, 0.2);
}

.ytr-time-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    background: var(--primary);
    cursor: pointer;
    border: 3px solid #fff;
    box-shadow: var(--shadow-md);
}

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

.format-card {
    position: relative;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: var(--space-8) var(--space-6);
    text-align: center;
    transition: all var(--duration-base) var(--ease);
    background: #fff;
}

.format-card:hover {
    border-color: var(--pink-300);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.format-card .format-icon {
    margin-bottom: var(--space-4);
    opacity: 0.9;
}

.format-card h6 {
    font-weight: var(--font-semibold);
    margin-bottom: var(--space-2);
    font-size: var(--text-lg);
    color: var(--gray-900);
}

.format-card p {
    color: var(--gray-500);
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
}

/* ==========================================================================
   Recommended Badge (Platform Detection)
   ========================================================================== */

.recommended-badge {
    position: absolute;
    top: -10px;
    right: 10px;
    background: linear-gradient(135deg, #ffc107 0%, #ff9800 100%);
    color: #212529;
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    box-shadow: 0 2px 8px rgba(255, 193, 7, 0.4);
    z-index: 1;
}

.format-card.recommended {
    border-color: #ffc107 !important;
    box-shadow: 0 4px 20px rgba(255, 193, 7, 0.25);
}

.format-card.recommended .recommended-badge {
    display: inline-flex !important;
}

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

.download-btn {
    padding: var(--space-3) var(--space-6);
    font-weight: var(--font-medium);
    border-radius: var(--radius-md);
    transition: all var(--duration-base) var(--ease);
}

.download-btn:hover {
    transform: scale(1.02);
}

.download-btn:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.downloading .btn-text {
    animation: pulse 1.5s infinite;
}

/* ==========================================================================
   Help Links
   ========================================================================== */

.help-link {
    color: var(--gray-500);
    text-decoration: none;
    font-size: var(--text-sm);
    transition: color var(--duration-fast) var(--ease);
}

.help-link:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* ==========================================================================
   Full Song Download Section
   ========================================================================== */

.ytr-full-song-section {
    margin-top: var(--space-8);
}

.ytr-divider-label {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.ytr-divider-label::before,
.ytr-divider-label::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--gray-200);
}

.ytr-divider-label span {
    font-size: var(--text-sm);
    color: var(--gray-400);
    font-weight: var(--font-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.ytr-full-song-card {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    padding: var(--space-5) var(--space-6);
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: border-color var(--duration-base) var(--ease), box-shadow var(--duration-base) var(--ease);
}

.ytr-full-song-card:hover {
    border-color: var(--gray-300);
    box-shadow: var(--shadow-md);
}

.ytr-full-song-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--pink-50);
    color: var(--pink-500);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xl);
    flex-shrink: 0;
}

.ytr-full-song-info {
    flex: 1;
    min-width: 0;
}

.ytr-full-song-info h6 {
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    color: var(--gray-900);
    margin: 0 0 var(--space-1);
}

.ytr-full-song-info p {
    font-size: var(--text-sm);
    color: var(--gray-500);
    margin: 0;
    line-height: var(--leading-normal);
}

/* ==========================================================================
   Progress Steps UI
   ========================================================================== */

.progress-steps {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    position: relative;
    padding: 0 var(--space-4);
}

.progress-steps::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 10%;
    right: 10%;
    height: 3px;
    background: var(--gray-200);
    z-index: 0;
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 1;
    flex: 1;
    max-width: 100px;
}

.progress-step-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--gray-200);
    color: var(--gray-500);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-base);
    transition: all var(--duration-slow) var(--ease);
    margin-bottom: var(--space-2);
}

.progress-step.active .progress-step-icon {
    background: var(--primary);
    color: #fff;
    animation: pulse-step 1.5s infinite;
}

.progress-step.completed .progress-step-icon {
    background: var(--success);
    color: #fff;
}

.progress-step-label {
    font-size: var(--text-xs);
    color: var(--gray-500);
    text-align: center;
    white-space: nowrap;
}

.progress-step.active .progress-step-label,
.progress-step.completed .progress-step-label {
    color: var(--gray-900);
    font-weight: var(--font-medium);
}

@keyframes pulse-step {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 107, 129, 0.4);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(255, 107, 129, 0);
    }
}

/* Progress bar */
.ytr-progress-bar-track {
    height: 6px;
    background: var(--gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.ytr-progress-bar-fill {
    height: 100%;
    background: var(--primary);
    border-radius: var(--radius-full);
    transition: width var(--duration-slow) var(--ease);
}

.ytr-progress-bar-fill.animated {
    background: linear-gradient(90deg, var(--pink-400), var(--pink-500), var(--pink-400));
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

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

/* ==========================================================================
   Progress Area Card
   ========================================================================== */

#progressArea .card {
    border-width: 2px;
    border-color: var(--pink-200);
}

/* ==========================================================================
   Resume Banner
   ========================================================================== */

.ytr-resume-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--info-bg);
    border: 1px solid #BFDBFE;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    color: #1E40AF;
}

.ytr-resume-banner-text {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    min-width: 0;
}

.ytr-resume-banner-text span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ytr-resume-actions {
    display: flex;
    gap: var(--space-2);
    flex-shrink: 0;
}

/* ==========================================================================
   Success Area
   ========================================================================== */

.ytr-success-card {
    text-align: center;
    padding: var(--space-8) var(--space-6);
    background: var(--success-bg);
    border: 1px solid #BBF7D0;
    border-radius: var(--radius-lg);
}

.ytr-success-card .ytr-success-icon {
    font-size: var(--text-4xl);
    color: var(--success);
    margin-bottom: var(--space-4);
}

.ytr-success-card h5 {
    color: #166534;
    font-weight: var(--font-semibold);
    margin-bottom: var(--space-3);
}

.ytr-success-card p {
    color: var(--gray-500);
    font-size: var(--text-sm);
    margin-bottom: var(--space-4);
}

/* ==========================================================================
   Features Info Section
   ========================================================================== */

#featuresInfo {
    border-top: 1px solid var(--gray-200);
    padding-top: var(--space-8);
    margin-top: var(--space-8);
}

.ytr-feature-item {
    text-align: center;
    padding: var(--space-4);
}

.ytr-feature-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--pink-50);
    color: var(--pink-500);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xl);
    margin: 0 auto var(--space-4);
}

.ytr-feature-item h6 {
    font-weight: var(--font-semibold);
    color: var(--gray-900);
    margin-bottom: var(--space-2);
}

.ytr-feature-item p {
    font-size: var(--text-sm);
    color: var(--gray-500);
    line-height: var(--leading-relaxed);
    margin: 0;
}

/* ==========================================================================
   Info Tip
   ========================================================================== */

.ytr-info-tip {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--info-bg);
    border: 1px solid #BFDBFE;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    color: #1E40AF;
}

.ytr-info-tip i {
    margin-top: 2px;
    flex-shrink: 0;
}

/* ==========================================================================
   Touch Hint (Mobile)
   ========================================================================== */

.touch-hint {
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    font-size: var(--text-xs);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    z-index: 10;
    white-space: nowrap;
    animation: fadeInUp 0.5s var(--ease);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* ==========================================================================
   URL Form
   ========================================================================== */

.ytr-url-group {
    display: flex;
    gap: 0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--gray-300);
    transition: border-color var(--duration-fast) var(--ease), box-shadow var(--duration-fast) var(--ease);
}

.ytr-url-group:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 129, 0.15);
}

.ytr-url-input-row {
    display: flex;
    align-items: center;
    flex: 1;
    min-width: 0;
    background: #fff;
}

.ytr-url-icon {
    padding: 0 var(--space-2) 0 var(--space-4);
    display: flex;
    align-items: center;
    flex-shrink: 0;
    font-size: var(--text-lg);
}

.ytr-url-input {
    flex: 1;
    min-width: 0;
    border: none;
    outline: none;
    padding: var(--space-4);
    font-size: var(--text-base);
    font-family: var(--font-sans);
    color: var(--gray-900);
    background: transparent;
}

.ytr-url-input::placeholder {
    color: var(--gray-400);
}

.ytr-url-btn {
    flex-shrink: 0;
    border-radius: 0 !important;
    white-space: nowrap;
    padding-left: var(--space-6);
    padding-right: var(--space-6);
}

/* ==========================================================================
   Instructions Modal
   ========================================================================== */

.ios-instructions ol {
    padding-left: var(--space-6);
}

.ios-instructions li {
    margin-bottom: var(--space-3);
    line-height: var(--leading-relaxed);
}

.ios-instructions .card {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

/* Modal footer button override */
#instructionsModal .modal-footer .btn-primary {
    background: var(--primary);
    border-color: var(--primary);
}

#instructionsModal .modal-footer .btn-primary:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
}

#instructionsModal .spinner-border {
    color: var(--primary);
}

/* ==========================================================================
   Animations
   ========================================================================== */

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ==========================================================================
   Responsive: Tablet
   ========================================================================== */

@media (max-width: 768px) {
    .youtube-ringtone-app {
        padding-left: var(--space-2);
        padding-right: var(--space-2);
    }

    .waveform-container {
        padding: var(--space-4);
        min-height: 120px;
        padding-bottom: 2.5rem;
    }

    .waveform-container ::part(region-handle) {
        width: 18px !important;
        background: rgba(255, 255, 255, 0.9) !important;
    }

    .touch-hint.show-mobile {
        display: block !important;
    }

    /* Show mobile sliders, hide desktop inputs */
    .ytr-time-sliders {
        display: flex;
    }

    .ytr-time-inputs-desktop {
        display: none;
    }

    .format-card {
        padding: var(--space-6) var(--space-4);
        margin-bottom: var(--space-4);
    }

    .format-card .format-icon i {
        font-size: 2.5rem !important;
    }

    /* URL form stacks vertically on mobile */
    .ytr-url-group {
        flex-direction: column;
        border-radius: var(--radius-lg);
    }

    .ytr-url-input-row {
        border-bottom: 1px solid var(--gray-200);
    }

    .ytr-url-input {
        font-size: 16px; /* prevents iOS auto-zoom on focus */
    }

    .ytr-url-btn {
        width: 100%;
        border-radius: 0 !important;
        padding: var(--space-4) var(--space-6);
    }

    .progress-steps {
        padding: 0;
    }

    .progress-step-label {
        font-size: 0.65rem;
    }

    .progress-step-icon {
        width: 32px;
        height: 32px;
        font-size: var(--text-sm);
    }

    .progress-steps::before {
        top: 16px;
    }

    .ytr-full-song-card {
        flex-direction: column;
        text-align: center;
    }

    .ytr-resume-banner {
        flex-direction: column;
        text-align: center;
    }

    .ytr-feature-item {
        border-bottom: 1px solid var(--gray-200);
        padding-bottom: var(--space-4);
        margin-bottom: var(--space-4);
    }

    .ytr-feature-item:last-child {
        border-bottom: 0;
        margin-bottom: 0;
    }
}

/* ==========================================================================
   Responsive: Small mobile
   ========================================================================== */

@media (max-width: 576px) {
    .card-body {
        padding: var(--space-4);
    }

    .format-card {
        padding: var(--space-5);
    }

    .ytr-time-actions {
        width: 100%;
        justify-content: center;
        margin-left: 0;
        margin-top: var(--space-2);
    }
}

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

.cursor-pointer {
    cursor: pointer;
}

.user-select-none {
    user-select: none;
}