/* DuRöhre - YouTube Clone Styles */
:root {
    --primary-color: #ff0000;
    --primary-dark: #cc0000;
    --primary-hover: #ff1a1a;
    --secondary-color: #333333;
    --background-color: #0f0f0f;
    --surface-color: #212121;
    --surface-hover: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #aaaaaa;
    --text-muted: #717171;
    --border-color: #303030;
    --border-light: #404040;
    --success-color: #00d562;
    --error-color: #ff0000;
    --warning-color: #ffb700;
    --youtube-red: #ff0000;
    --youtube-dark: #181818;
    --youtube-darker: #0f0f0f;

    /* Aliases, die die einzelnen Seiten-Stylesheets erwarten.
       Single Source of Truth nach Konsolidierung der Inline-:root-Blocks. */
    --bg-dark: #0F0F0F;
    --bg-light: #181818;
    --hover-bg: #272727;

    /* Typographie-Skala */
    --fs-xs:   0.75rem;
    --fs-sm:   0.85rem;
    --fs-base: 1rem;
    --fs-lg:   1.125rem;
    --fs-xl:   1.5rem;
    --fs-2xl:  2rem;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Header - YouTube Style */
.header {
    background-color: var(--youtube-dark);
    padding: 0 16px;
    height: 56px;
    border-bottom: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 0 rgba(255,255,255,0.1);
}

.logo {
    font-size: 20px;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0px;
    padding: 6px 0 10px 0;
}

.logo-main {
    display: flex;
    align-items: center;
    gap: 8px;
}

.brand-logo {
    display: block;
}

.logo-slogan {
    font-size: 0.75rem;
    color: var(--text-primary);
    font-weight: normal;
    line-height: 1;
    opacity: 0.7;
    margin-left: 0;
    margin-top: -4px;
}

.logo:hover {
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    gap: 8px;
    align-items: center;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 18px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    background: transparent;
    border: 1px solid var(--border-color);
}

.nav-links a:hover {
    background-color: var(--surface-hover);
    border-color: var(--border-light);
}

.nav-links .btn {
    padding: 8px 16px;
    font-size: 14px;
    border-radius: 18px;
    font-weight: 500;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    transition: all 0.3s;
    font-weight: 500;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
}

.btn-secondary {
    background-color: var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: #555;
}

.btn-danger {
    background-color: var(--error-color);
    color: white;
}

.btn-danger:hover {
    background-color: #cc0000;
}

/* Forms */
.form-container {
    max-width: 400px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: var(--surface-color);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
}

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

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(255, 68, 68, 0.2);
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

/* Video Grid - YouTube Style */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 16px 16px;
    padding: 24px;
    max-width: 1284px;
    margin: 0 auto;
}

.video-card {
    background-color: transparent;
    border-radius: 0;
    overflow: hidden;
    border: none;
    transition: none;
    cursor: pointer;
}

.video-card:hover .video-thumbnail {
    border-radius: 12px;
}

.video-thumbnail-container {
    position: relative;
    margin-bottom: 12px;
}

.video-thumbnail {
    width: 100%;
    height: 202px;
    object-fit: cover;
    background-color: var(--surface-color);
    border-radius: 12px;
    transition: border-radius 0.2s;
}

.video-info {
    padding: 0;
    display: flex;
    gap: 12px;
}

.video-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 500;
    font-size: 14px;
    flex-shrink: 0;
}

.video-details {
    flex: 1;
    min-width: 0;
}

.video-title {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 4px;
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-channel {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 2px;
}

.video-meta {
    color: var(--text-muted);
    font-size: 14px;
    display: flex;
    gap: 4px;
    align-items: center;
}

.video-meta-separator {
    width: 2px;
    height: 2px;
    background-color: var(--text-muted);
    border-radius: 50%;
}

.video-duration {
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 2px 4px;
    border-radius: 2px;
    font-size: 12px;
    font-weight: 500;
    position: absolute;
    bottom: 8px;
    right: 8px;
    font-family: 'Roboto Mono', monospace;
}


/* Upload Area */
.upload-container {
    max-width: 600px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 3rem;
    text-align: center;
    background-color: var(--surface-color);
    transition: border-color 0.3s;
    cursor: pointer;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary-color);
    background-color: rgba(255, 68, 68, 0.05);
}

.upload-icon {
    font-size: 3rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.upload-text {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.file-input {
    display: none;
}

/* Progress Bar */
.progress-container {
    margin: 1rem 0;
    display: none;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    width: 0%;
    transition: width 0.3s;
}

.progress-text {
    text-align: center;
    margin-top: 0.5rem;
    color: var(--text-secondary);
}

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

.alert-success {
    background-color: rgba(0, 170, 0, 0.1);
    border-color: var(--success-color);
    color: var(--success-color);
}

.alert-error {
    background-color: rgba(255, 68, 68, 0.1);
    border-color: var(--error-color);
    color: var(--error-color);
}

.alert-warning {
    background-color: rgba(255, 170, 0, 0.1);
    border-color: var(--warning-color);
    color: var(--warning-color);
}

/* Loading Spinner */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

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

/* Share Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
}

.modal-content {
    background-color: var(--surface-color);
    margin: 10% auto;
    padding: 2rem;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    border: 1px solid var(--border-color);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-title {
    font-size: 1.3rem;
    font-weight: 600;
}

.close {
    color: var(--text-secondary);
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
}

.close:hover {
    color: var(--text-primary);
}

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

    .nav-links {
        gap: 1rem;
    }

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

    .form-container {
        margin: 1rem;
        padding: 1.5rem;
    }

    .upload-container,
    .player-container {
        padding: 0 1rem;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.hidden { display: none !important; }
.flex { display: flex; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }

/* Toast-Notifications (wird von frontend/js/ui.js befüllt) */
.du-toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
}
.du-toast {
    background: var(--surface-color);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: 6px;
    border-left: 4px solid #3ea6ff;
    box-shadow: 0 4px 16px rgba(0,0,0,.4);
    font-size: .9rem;
    opacity: 0;
    transform: translateY(-6px);
    transition: opacity .3s ease, transform .3s ease;
    max-width: 320px;
    pointer-events: auto;
}
.du-toast-visible { opacity: 1; transform: translateY(0); }
.du-toast-success { border-left-color: var(--success-color); }
.du-toast-error   { border-left-color: #ff4444; }
.du-toast-warning { border-left-color: var(--warning-color); }