/* ==========================================================================
   VIDEO CONVERTER - PREMIUM PURPLE ACCENT THEME
   ========================================================================== */

.text-gradient-purple {
    background: linear-gradient(135deg, #a855f7, #6366f1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.tool-container {
    max-width: 900px;
    margin: 0 auto;
    padding: calc(var(--nav-height) + 2rem) 2rem 4rem;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    transition: var(--transition-smooth);
}

.back-link:hover {
    color: #c084fc;
    transform: translateX(-4px);
}

.back-link svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
    transform: rotate(180deg);
}

.tool-page-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.tool-page-header .back-link {
    justify-content: center;
}

.tool-page-header h1 {
    font-size: 2.8rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.tool-page-header p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 1.5rem;
    border-radius: 12px;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-primary {
    background: linear-gradient(135deg, #a855f7, #6366f1);
    color: white;
    box-shadow: 0 0 25px rgba(168, 85, 247, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 35px rgba(168, 85, 247, 0.4);
    filter: brightness(1.1);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: #e2e8f0;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(168, 85, 247, 0.3);
    transform: translateY(-2px);
}

/* ==========================================================================
   CONVERTER MAIN BOX
   ========================================================================== */
.converter-box {
    padding: 30px;
    border-radius: 24px;
    margin-bottom: 40px;
    background: rgba(15, 23, 42, 0.45);
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

/* Dropzone styling */
.dropzone {
    border: 2px dashed rgba(168, 85, 247, 0.3);
    border-radius: 20px;
    padding: 60px 40px;
    text-align: center;
    background: rgba(168, 85, 247, 0.02);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.dropzone:hover {
    border-color: rgba(168, 85, 247, 0.6);
    background: rgba(168, 85, 247, 0.05);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(168, 85, 247, 0.06);
}

.dropzone-icon {
    width: 72px;
    height: 72px;
    background: rgba(168, 85, 247, 0.1);
    color: #c084fc;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    box-shadow: 0 8px 24px rgba(168, 85, 247, 0.1);
}

.dropzone-icon svg {
    width: 36px;
    height: 36px;
    fill: currentColor;
}

.dropzone h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #f8fafc;
    margin-bottom: 8px;
}

.dropzone p {
    font-size: 0.9rem;
    color: #94a3b8;
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.5;
}

/* ==========================================================================
   WORKSPACE LAYOUT
   ========================================================================== */
.workspace {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 30px;
}

@media (max-width: 992px) {
    .workspace {
        grid-template-columns: 1fr;
    }
}

.media-preview-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.video-container {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #090d16;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.video-container video {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.media-info {
    padding: 20px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    font-size: 0.95rem;
}

.info-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.info-row:first-child {
    padding-top: 0;
}

.info-label {
    color: #94a3b8;
}

.info-value {
    color: #f1f5f9;
    font-weight: 500;
    word-break: break-all;
    text-align: right;
    max-width: 65%;
}

/* ==========================================================================
   CONTROL PANEL
   ========================================================================== */
.control-panel {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.panel-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: #c084fc;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ==========================================================================
   DROPDOWN FORMAT SELECTOR
   ========================================================================== */
.format-selection-group {
    position: relative;
}

.dropdown-trigger {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 20px;
    border-radius: 12px;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: #f1f5f9;
    font-weight: 600;
    font-size: 1.05rem;
    transition: all 0.2s ease;
}

.dropdown-trigger:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(168, 85, 247, 0.4);
}

.dropdown-trigger svg {
    fill: #94a3b8;
    transition: transform 0.2s ease;
}

.dropdown-trigger.open svg {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    z-index: 100;
    border-radius: 16px;
    background: #0f172a;
    border: 1px solid rgba(168, 85, 247, 0.2);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    padding: 16px;
    display: none;
    flex-direction: column;
    gap: 12px;
    animation: slideDownFade 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

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

.dropdown-menu.open {
    display: flex;
}

.dropdown-search input {
    width: 100%;
    padding: 10px 14px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #f1f5f9;
    font-size: 0.9rem;
    outline: none;
    box-sizing: border-box;
}

.dropdown-search input:focus {
    border-color: rgba(168, 85, 247, 0.4);
    background: rgba(255, 255, 255, 0.06);
}

.dropdown-columns {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 16px;
    min-height: 180px;
}

.dropdown-categories {
    border-right: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-right: 8px;
}

.category-item {
    padding: 8px 10px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    color: #94a3b8;
    cursor: pointer;
    transition: all 0.2s ease;
}

.category-item:hover, .category-item.active {
    color: #c084fc;
    background: rgba(168, 85, 247, 0.08);
}

.category-formats {
    display: none;
    grid-template-columns: repeat(auto-fill, minmax(65px, 1fr));
    gap: 8px;
    align-content: start;
    overflow-y: auto;
    max-height: 180px;
    padding-right: 4px;
}

.category-formats.active {
    display: grid;
}

.category-formats::-webkit-scrollbar {
    width: 4px;
}
.category-formats::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.format-btn {
    padding: 8px 4px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: #e2e8f0;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s ease;
}

.format-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(168, 85, 247, 0.3);
    color: #f8fafc;
}

.format-btn.selected {
    background: #7c3aed;
    border-color: #7c3aed;
    color: #ffffff;
    box-shadow: 0 0 12px rgba(124, 58, 237, 0.4);
}

/* ==========================================================================
   OPTIONS PANEL
   ========================================================================== */
.format-options-panel {
    padding: 20px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.format-options-panel h4 {
    margin-top: 0;
    margin-bottom: 16px;
    font-size: 0.95rem;
    color: #f1f5f9;
    font-weight: 600;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 10px;
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.option-group .sub-option {
    margin-bottom: 12px;
}
.option-group .sub-option:last-child {
    margin-bottom: 0;
}

.option-label {
    font-size: 0.85rem;
    color: #94a3b8;
    font-weight: 500;
    display: block;
    margin-bottom: 6px;
}

.option-select {
    width: 100%;
    padding: 10px 14px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: #f1f5f9;
    font-size: 0.9rem;
    outline: none;
    cursor: pointer;
}

.option-select option {
    background: #0f172a;
    color: #f1f5f9;
}

/* Action Buttons */
.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 16px;
    margin-top: 10px;
}

/* ==========================================================================
   LOADING SPINNER (shared with progress)
   ========================================================================== */
.loading-spinner {
    position: relative;
    width: 60px;
    height: 60px;
    margin: 0 auto;
}

.spinner-ring {
    position: absolute;
    inset: 0;
    border: 3px solid transparent;
    border-radius: 50%;
}

.spinner-ring:nth-child(1) {
    border-top-color: #a855f7;
    animation: spin 1.2s linear infinite;
}

.spinner-ring:nth-child(2) {
    inset: 6px;
    border-right-color: #6366f1;
    animation: spin 1.5s linear infinite reverse;
}

.spinner-ring:nth-child(3) {
    inset: 12px;
    border-bottom-color: #818cf8;
    animation: spin 1s linear infinite;
}

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

/* ==========================================================================
   PROGRESS PANEL
   ========================================================================== */
.progress-panel {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 10px;
}

.progress-card {
    text-align: center;
    width: 100%;
    max-width: 500px;
    padding: 40px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.progress-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #f8fafc;
    margin: 20px 0 8px;
}

.progress-card p {
    font-size: 0.9rem;
    color: #94a3b8;
    margin-bottom: 24px;
    line-height: 1.5;
}

.progress-bar-container {
    height: 10px;
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    margin-bottom: 24px;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #a855f7, #6366f1);
    border-radius: 10px;
    transition: width 0.1s linear;
}

.progress-percentage {
    position: absolute;
    right: 0;
    top: -24px;
    font-size: 0.85rem;
    font-weight: 600;
    color: #c084fc;
}

.processing-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.stat-box {
    display: flex;
    flex-direction: column;
    gap: 4px;
    text-align: left;
}

.stat-label {
    font-size: 0.8rem;
    color: #64748b;
}

.stat-value {
    font-size: 0.9rem;
    font-weight: 600;
    color: #cbd5e1;
}

/* ==========================================================================
   RESULTS PANEL
   ========================================================================== */
.results-panel {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px 10px;
}

.results-card {
    text-align: center;
    width: 100%;
    max-width: 500px;
    padding: 40px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.success-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.1);
}

.success-icon svg {
    width: 32px;
    height: 32px;
    fill: currentColor;
}

.results-card h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: #f8fafc;
    margin-bottom: 8px;
}

.results-card p {
    font-size: 0.9rem;
    color: #94a3b8;
    margin-bottom: 24px;
}

.result-details {
    padding: 16px 20px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    margin-bottom: 30px;
}

.result-actions {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 16px;
}

.result-actions .btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

/* ==========================================================================
   HOW TO USE / FEATURES SECTION
   ========================================================================== */
.howto-section {
    --howto-accent-glow: rgba(168, 85, 247, 0.3);
    --howto-grad: linear-gradient(135deg, #a855f7, #6366f1);
    --howto-accent-color: #c084fc;
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 768px) {
    .tool-container {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .tool-page-header h1 {
        font-size: 1.9rem;
    }

    .tool-page-header p {
        font-size: 0.9rem;
    }

    .howto-grid {
        grid-template-columns: 1fr;
        gap: 1.75rem;
    }

    .action-buttons {
        grid-template-columns: 1fr;
    }

    .result-actions {
        grid-template-columns: 1fr;
    }

    .converter-box {
        padding: 16px;
    }

    .dropzone {
        padding: 40px 20px;
    }
}

@media (max-width: 480px) {
    .tool-page-header h1 {
        font-size: 1.6rem;
    }
}