/**
 * YouTube to MP4 Converter - Optimized Styles
 * Version: 16.0.0
 * With Cloudflare Turnstile Integration
 */

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

/* ==============================================
   CONVERTER WRAPPER
   ============================================== */
.yt-converter-wrapper {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

.yt-converter-container {
    background: #FFFFFF;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

/* ==============================================
   INPUT SECTION
   ============================================== */
.yt-converter-input-section {
    margin-bottom: 30px;
}

.input-wrapper {
    position: relative;
    margin-bottom: 24px;
}

.yt-video-url {
    width: 100%;
    padding: 18px 60px 18px 20px;
    font-size: 16px;
    border: 2px solid #E5E5E5;
    border-radius: 12px;
    outline: none;
    transition: all 0.3s ease;
    font-family: inherit;
}

.yt-video-url:focus {
    border-color: #FF9B0E;
    box-shadow: 0 0 0 3px rgba(255, 155, 14, 0.1);
}

.yt-video-url::placeholder {
    color: #999;
}

.paste-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: #F5F5F5;
    border: none;
    border-radius: 8px;
    padding: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.paste-btn svg {
    width: 20px;
    height: 20px;
    fill: #606060;
}

.paste-btn:hover {
    background: #FF9B0E;
}

.paste-btn:hover svg {
    fill: #FFFFFF;
}

/* ==============================================
   QUALITY SELECTOR
   ============================================== */
.quality-selector {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.quality-btn {
    flex: 1;
    min-width: 80px;
    padding: 12px 16px;
    background: #F5F5F5;
    border: 2px solid #E5E5E5;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    color: #606060;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.quality-btn:hover {
    background: #FFF5E6;
    border-color: #FF9B0E;
    color: #FF9B0E;
}

.quality-btn.active {
    background: linear-gradient(135deg, #FF9B0E 0%, #FFA726 100%);
    border-color: #FF9B0E;
    color: #FFFFFF;
}

/* ==============================================
   CONVERT BUTTON
   ============================================== */
.convert-btn {
    width: 100%;
    padding: 18px 32px;
    background: linear-gradient(135deg, #FF9B0E 0%, #FFA726 100%);
    border: none;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 700;
    color: #FFFFFF;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 4px 12px rgba(255, 155, 14, 0.3);
}

.convert-btn svg {
    width: 20px;
    height: 20px;
    fill: #FFFFFF;
}

.convert-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 155, 14, 0.4);
}

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

/* ==============================================
   ERROR MESSAGE
   ============================================== */
.error-message {
    display: none;
    padding: 16px 20px;
    background: #FFF0F0;
    border: 2px solid #FF4444;
    border-radius: 10px;
    color: #CC0000;
    font-size: 15px;
    margin-top: 20px;
    animation: slideDown 0.3s ease-out;
}

.error-message.show {
    display: block;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==============================================
   LOADING STATE
   ============================================== */
.loading-state {
    display: none;
    text-align: center;
    padding: 40px 20px;
    margin-top: 30px;
}

.loading-state.show {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.spinner-wrapper {
    margin-bottom: 20px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #F5F5F5;
    border-top-color: #FF9B0E;
    border-radius: 50%;
    margin: 0 auto;
    animation: spin 0.8s linear infinite;
}

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

.loading-text {
    font-size: 18px;
    font-weight: 600;
    color: #0F0F0F;
    margin-bottom: 8px;
}

.loading-subtext {
    font-size: 14px;
    color: #606060;
}

/* ==============================================
   RESULT SECTION
   ============================================== */
.result-section {
    display: none;
    margin-top: 30px;
    padding: 24px;
    background: linear-gradient(135deg, #F8F9FA 0%, #FFFFFF 100%);
    border: 2px solid #E5E5E5;
    border-radius: 16px;
    animation: slideUp 0.4s ease-out;
}

.result-section.show {
    display: block;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Video Preview Card */
.video-preview {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
    padding: 20px;
    background: #FFFFFF;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
}

.video-preview:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.video-thumbnail {
    width: 180px;
    height: 101px;
    object-fit: cover;
    border-radius: 10px;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.video-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.video-title {
    font-size: 18px;
    font-weight: 700;
    color: #0F0F0F;
    margin: 0 0 12px 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Video Meta Information */
.video-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: #606060;
    padding: 6px 12px;
    background: #F5F5F5;
    border-radius: 8px;
}

.meta-item svg {
    width: 16px;
    height: 16px;
    fill: #FF9B0E;
    flex-shrink: 0;
}

.meta-item span {
    font-weight: 600;
}

/* ==============================================
   TURNSTILE VERIFICATION SECTION
   ============================================== */
.turnstile-verification {
    display: none;
    padding: 24px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #F0F7FF 0%, #FFFFFF 100%);
    border: 2px solid #2196F3;
    border-radius: 12px;
    text-align: center;
    animation: verificationSlide 0.4s ease-out;
}

.turnstile-verification.show {
    display: block;
}

@keyframes verificationSlide {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.verification-header {
    margin-bottom: 20px;
}

.verification-header .shield-icon {
    width: 48px;
    height: 48px;
    fill: #2196F3;
    margin: 0 auto 12px;
    display: block;
}

.verification-header h4 {
    font-size: 20px;
    font-weight: 700;
    color: #0F0F0F;
    margin: 0 0 8px 0;
}

.verification-header p {
    font-size: 14px;
    color: #606060;
    margin: 0;
}

#yt-turnstile-widget {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 65px;
}

/* Ensure only one Turnstile widget displays */
#yt-turnstile-widget > div:not(:first-child) {
    display: none !important;
}

#yt-turnstile-widget iframe {
    margin: 0 auto;
}

/* Download Button */
.download-btn {
    width: 100%;
    padding: 18px 32px;
    background: linear-gradient(135deg, #4CAF50 0%, #45A049 100%);
    border: none;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 700;
    color: #FFFFFF;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

.download-btn svg {
    width: 24px;
    height: 24px;
    fill: #FFFFFF;
}

.download-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.4);
    background: linear-gradient(135deg, #45A049 0%, #3D8B40 100%);
}

.download-btn:active:not(:disabled) {
    transform: translateY(0);
}

/* Disabled Download Button */
.download-btn:disabled,
.download-btn.disabled {
    background: linear-gradient(135deg, #9E9E9E 0%, #757575 100%);
    cursor: not-allowed;
    opacity: 0.7;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.download-btn:disabled:hover,
.download-btn.disabled:hover {
    transform: none;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

/* Verified Animation */
.download-btn.verified {
    animation: verifiedPulse 0.6s ease-out;
}

@keyframes verifiedPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* ==============================================
   FEATURES SECTION
   ============================================== */
.ytmp4-features-section {
    max-width: 1200px;
    margin: 60px auto;
    padding: 20px;
}

.ytmp4-features-header {
    text-align: center;
    margin-bottom: 50px;
}

.ytmp4-features-header h2 {
    font-size: 36px;
    font-weight: 700;
    color: #0F0F0F;
    margin-bottom: 12px;
}

.ytmp4-features-header p {
    font-size: 18px;
    color: #606060;
}

.ytmp4-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.ytmp4-feature-card {
    background: #FFFFFF;
    padding: 30px;
    border-radius: 16px;
    border: 2px solid #E5E5E5;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.ytmp4-feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #FF9B0E, #FFA726);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.ytmp4-feature-card:hover {
    border-color: #FF9B0E;
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(255, 155, 14, 0.2);
}

.ytmp4-feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 30px;
    height: 30px;
    fill: #FFFFFF;
}

/* Gradient Colors */
.blue-gradient { background: linear-gradient(135deg, #2196F3, #1976D2); }
.green-gradient { background: linear-gradient(135deg, #4CAF50, #388E3C); }
.orange-gradient { background: linear-gradient(135deg, #FF9B0E, #FFA726); }
.purple-gradient { background: linear-gradient(135deg, #9C27B0, #7B1FA2); }
.red-gradient { background: linear-gradient(135deg, #F44336, #D32F2F); }
.cyan-gradient { background: linear-gradient(135deg, #00BCD4, #0097A7); }
.pink-gradient { background: linear-gradient(135deg, #E91E63, #C2185B); }
.teal-gradient { background: linear-gradient(135deg, #009688, #00796B); }

.ytmp4-feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: #0F0F0F;
    margin-bottom: 10px;
}

.ytmp4-feature-card p {
    font-size: 15px;
    color: #606060;
    line-height: 1.6;
}

/* ==============================================
   HOW TO SECTION
   ============================================== */
.how-to-section {
    max-width: 1000px;
    margin: 60px auto;
    padding: 20px;
}

.how-to-header {
    text-align: center;
    margin-bottom: 50px;
}

.how-to-header h2 {
    font-size: 36px;
    font-weight: 700;
    color: #0F0F0F;
    margin-bottom: 12px;
}

.how-to-header p {
    font-size: 18px;
    color: #606060;
}

.how-to-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.step-card {
    background: #FFFFFF;
    padding: 30px;
    border-radius: 16px;
    border: 2px solid #E5E5E5;
    transition: all 0.3s ease;
}

.step-card:hover {
    border-color: #FF9B0E;
    box-shadow: 0 8px 24px rgba(255, 155, 14, 0.15);
    transform: translateY(-5px);
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #FF9B0E, #FFA726);
    color: #FFFFFF;
    font-size: 24px;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.step-content h3 {
    font-size: 20px;
    font-weight: 700;
    color: #0F0F0F;
    margin-bottom: 10px;
}

.step-content p {
    font-size: 15px;
    color: #606060;
    line-height: 1.6;
}

/* ==============================================
   RESPONSIVE DESIGN
   ============================================== */
@media (max-width: 768px) {
    .yt-converter-container {
        padding: 24px;
    }

    .quality-selector {
        gap: 8px;
    }

    .quality-btn {
        min-width: 70px;
        padding: 10px 12px;
        font-size: 13px;
    }

    .convert-btn {
        font-size: 16px;
        padding: 16px 24px;
    }

    .video-preview {
        flex-direction: column;
    }

    .video-thumbnail {
        width: 100%;
        height: auto;
        max-height: 200px;
    }

    .video-title {
        font-size: 16px;
    }

    .meta-item {
        font-size: 13px;
    }

    .verification-header h4 {
        font-size: 18px;
    }

    .verification-header p {
        font-size: 13px;
    }

    .ytmp4-features-header h2,
    .how-to-header h2 {
        font-size: 28px;
    }

    .ytmp4-features-header p,
    .how-to-header p {
        font-size: 16px;
    }

    .ytmp4-features-grid,
    .how-to-steps {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .yt-video-url {
        padding: 14px 50px 14px 16px;
        font-size: 14px;
    }

    .quality-btn {
        flex: 1 1 calc(50% - 8px);
    }

    .convert-btn,
    .download-btn {
        font-size: 16px;
        padding: 14px 20px;
    }

    .loading-text {
        font-size: 16px;
    }

    .video-meta {
        gap: 8px;
    }

    .meta-item {
        padding: 4px 8px;
        font-size: 12px;
    }

    .turnstile-verification {
        padding: 16px;
    }

    .verification-header .shield-icon {
        width: 40px;
        height: 40px;
    }

    .verification-header h4 {
        font-size: 16px;
    }
}