/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #000000;
    --secondary-color: #f5f5f5;
    --background-color: #ffffff;
    --card-background: #fafafa;
    --text-primary: #000000;
    --text-secondary: #666666;
    --border-color: #e0e0e0;
    --success-color: #000000;
    --error-color: #000000;
    --info-color: #000000;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Navigation */
.navbar {
    background-color: var(--secondary-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    color: #000000;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
    margin: 0;
}

.nav-menu li {
    display: flex;
    align-items: center;
}

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.2s;
    display: inline-block;
}

.nav-menu a:hover,
.nav-menu a.active {
    background-color: var(--border-color);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-user span {
    color: var(--text-primary);
    font-weight: 500;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    min-height: calc(100vh - 200px);
}

/* Alerts */
.alert {
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 4px;
    border-left: 4px solid;
}

.alert-success {
    background-color: #f5f5f5;
    border-color: var(--success-color);
    color: var(--text-primary);
}

.alert-error {
    background-color: #f5f5f5;
    border-color: var(--error-color);
    color: var(--text-primary);
}

.alert-info {
    background-color: #f5f5f5;
    border-color: var(--info-color);
    color: var(--text-primary);
}

/* Dashboard */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.video-count {
    color: var(--text-secondary);
}

/* Video Grid */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.video-card {
    background-color: var(--card-background);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.video-thumbnail {
    position: relative;
    display: block;
    aspect-ratio: 16/9;
    overflow: hidden;
    background-color: var(--secondary-color);
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.thumbnail-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
}

.video-info {
    padding: 1rem;
}

.video-title {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.video-title a {
    color: var(--text-primary);
    text-decoration: none;
}

.video-title a:hover {
    text-decoration: underline;
}

.video-channel {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

.video-date {
    color: var(--text-secondary);
}

/* Badges */
.badge {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
}

.badge-success {
    background-color: #000000;
    color: white;
}

.badge-info {
    background-color: #666666;
    color: white;
}

.badge-error {
    background-color: #000000;
    color: white;
}

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    font-size: 0.9rem;
    transition: opacity 0.2s;
}

.btn:hover {
    opacity: 0.8;
}

.btn-primary {
    background-color: #000000;
    color: white;
}

.btn-secondary {
    background-color: #f5f5f5;
    color: #000000;
    border: 1px solid #e0e0e0;
}

.btn-link {
    background-color: transparent;
    color: #000000;
    border: 1px solid #000000;
}

.btn-danger {
    background-color: #000000;
    color: white;
    border: 1px solid #000000;
}

.btn-danger:hover {
    background-color: #333333;
}

.btn-download {
    background-color: transparent;
    color: #000000;
    border: none;
    cursor: pointer;
    font-size: 0.85rem;
    padding: 0.25rem 0.5rem;
}

.btn-download:hover {
    text-decoration: underline;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-state h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Channels Page */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.channels-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.channel-card {
    background-color: var(--card-background);
    border-radius: 8px;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.channel-info h3 {
    margin-bottom: 0.5rem;
}

.channel-url {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.channel-url a {
    color: var(--text-secondary);
    text-decoration: none;
}

.channel-url a:hover {
    text-decoration: underline;
}

.channel-meta {
    display: flex;
    gap: 2rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.channel-actions {
    display: flex;
    gap: 1rem;
}

/* Downloads Page */
.downloads-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.download-card {
    background-color: var(--card-background);
    border-radius: 8px;
    padding: 1.5rem;
    display: grid;
    grid-template-columns: 200px 1fr auto auto;
    gap: 1.5rem;
    align-items: center;
    border: 1px solid var(--border-color);
}

.download-thumbnail {
    width: 200px;
    aspect-ratio: 16/9;
    overflow: hidden;
    border-radius: 4px;
    background-color: var(--secondary-color);
}

.download-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.download-info {
    flex: 1;
}

.download-title {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.download-title a {
    color: var(--text-primary);
    text-decoration: none;
}

.download-title a:hover {
    text-decoration: underline;
}

.download-channel {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.download-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.download-status-section {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
    min-width: 120px;
}

.download-size {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.download-error {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    max-width: 150px;
    word-wrap: break-word;
}

.download-actions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 120px;
}

.download-actions .btn {
    width: 100%;
    text-align: center;
}

/* Form */
.form-container {
    max-width: 600px;
    margin: 0 auto;
}

.channel-form {
    background-color: var(--card-background);
    padding: 2rem;
    border-radius: 8px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 1rem;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-help {
    display: block;
    margin-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
}

/* Help Section */
.help-section {
    max-width: 800px;
    margin: 3rem auto 0;
    padding: 2rem;
    background-color: var(--card-background);
    border-radius: 8px;
}

.help-section h3,
.help-section h4 {
    margin-bottom: 1rem;
}

.help-section ol,
.help-section ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.help-section li {
    margin-bottom: 0.5rem;
}

.help-section code {
    background-color: var(--secondary-color);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

/* Watch Page */
.watch-page {
    max-width: 1200px;
    margin: 0 auto;
}

.video-player-container {
    width: 100%;
    aspect-ratio: 16/9;
    background-color: var(--secondary-color);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.video-player {
    width: 100%;
    height: 100%;
}

.video-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.placeholder-content {
    padding: 2rem;
}

.placeholder-thumbnail {
    max-width: 100%;
    max-height: 300px;
    margin-bottom: 1rem;
    border-radius: 8px;
}

.video-details {
    background-color: var(--card-background);
    padding: 2rem;
    border-radius: 8px;
}

.video-details .video-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.video-metadata {
    display: flex;
    justify-content: space-between;
    padding-bottom: 1rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.channel-info h3 {
    margin-bottom: 0.5rem;
}

.channel-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
}

.channel-link:hover {
    text-decoration: underline;
}

.video-stats {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.video-description {
    margin-bottom: 1.5rem;
}

.video-description h4 {
    margin-bottom: 0.5rem;
}

.video-description p {
    color: var(--text-secondary);
    white-space: pre-wrap;
}

.video-links {
    display: flex;
    gap: 1rem;
}

.back-link {
    margin-top: 2rem;
}

.back-link a {
    color: var(--text-secondary);
    text-decoration: none;
}

.back-link a:hover {
    text-decoration: underline;
}

/* Auth Pages */
.auth-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 200px);
    padding: 2rem;
}

.auth-container {
    max-width: 450px;
    width: 100%;
    background-color: var(--card-background);
    padding: 3rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
}

.auth-container h2 {
    margin-bottom: 0.5rem;
    text-align: center;
}

.auth-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.auth-form {
    margin-bottom: 1.5rem;
}

.checkbox-group {
    display: flex;
    align-items: center;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    margin-right: 0.5rem;
    cursor: pointer;
}

.btn-block {
    width: 100%;
}

.auth-footer {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.auth-footer p {
    color: var(--text-secondary);
    margin: 0;
}

.auth-footer a {
    color: #000000;
    text-decoration: none;
    font-weight: 600;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Footer */
.footer {
    background-color: var(--secondary-color);
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .video-grid {
        grid-template-columns: 1fr;
    }

    .channel-card {
        flex-direction: column;
        gap: 1rem;
    }

    .channel-actions {
        width: 100%;
        flex-direction: column;
    }

    .page-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .video-metadata {
        flex-direction: column;
        gap: 1rem;
    }

    .video-stats {
        align-items: flex-start;
    }

    .download-card {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .download-thumbnail {
        width: 100%;
    }

    .download-actions {
        width: 100%;
    }
}