:root {
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --bg-card: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-primary: #6366f1;
    --accent-primary-hover: #4f46e5;
    --accent-secondary: #8b5cf6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --border-color: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.05);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-darker);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    overflow-x: hidden;
}

/* Base Layout Container */
.app-container {
    display: flex;
    width: 100%;
    min-height: 100vh;
}

/* Sidebar Styling */
.sidebar {
    width: 260px;
    background-color: var(--bg-dark);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 3rem;
    position: fixed;
    height: 100vh;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo i {
    color: var(--accent-primary);
    font-size: 2rem;
    filter: drop-shadow(0 0 10px rgba(99, 102, 241, 0.5));
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 0.75rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-item i {
    font-size: 1.25rem;
}

.nav-item:hover,
.nav-item.active {
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--text-primary);
}

.nav-item.active i {
    color: var(--accent-primary);
}

/* Main Content Area */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 2rem 4rem;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 3rem;
}

.header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #f8fafc, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
    transition: transform 0.3s ease;
}

.avatar:hover {
    transform: scale(1.05);
}

/* Form Container */
.content-wrapper {
    max-width: 800px;
    width: 100%;
}

.form-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 1.5rem;
    padding: 2.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.input-group label {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.input-with-icon {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-icon i {
    position: absolute;
    left: 1rem;
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: color 0.3s ease;
}

.input-with-icon input {
    width: 100%;
    background-color: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    padding: 1rem 1rem 1rem 3rem;
    border-radius: 0.75rem;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.input-with-icon input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

.input-with-icon input:focus+i {
    color: var(--accent-primary);
}

.input-with-icon input::placeholder {
    color: #475569;
}

/* Actions */
.actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    justify-content: flex-end;
}

.btn {
    padding: 0.875rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: var(--text-secondary);
}

/* Analysis Section */
.analysis-section {
    background-color: rgba(15, 23, 42, 0.5);
    border-radius: 1rem;
    padding: 1.5rem;
    margin: 2rem 0;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    animation: fadeIn 0.4s ease-out;
}

.analysis-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, var(--accent-primary), var(--accent-secondary));
}

.analysis-section h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.analysis-section h3 i {
    color: var(--warning);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-secondary);
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.metadata-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 1.5rem;
}

.meta-card {
    background-color: rgba(15, 23, 42, 0.8);
    padding: 1rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border: 1px solid var(--border-color);
}

.meta-card i {
    font-size: 1.5rem;
    color: var(--accent-primary);
}

.meta-info {
    display: flex;
    flex-direction: column;
}

.meta-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.meta-value {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
}

.status-active {
    color: var(--success);
}

.status-invalid {
    color: var(--danger);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    padding: 1rem 1.5rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    color: var(--success);
    font-weight: 500;
    transform: translateY(150%);
    transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 1000;
}

.toast.show {
    transform: translateY(0);
}

.toast i {
    font-size: 1.5rem;
}

.toast.error i,
.toast.error span {
    color: var(--danger);
}

/* Split Layout & Preview Section */
.split-layout {
    max-width: 1200px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

.preview-card {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.preview-header h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.3s;
}

.btn-icon:hover {
    color: var(--accent-primary);
}

.player-container {
    width: 100%;
    border-radius: 0.75rem;
    overflow: hidden;
    background-color: #000;
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
}

.player-container video {
    width: 100%;
    max-height: 400px;
    display: block;
}

.capture-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.w-100 {
    width: 100%;
}

.thumbnail-preview-container {
    background-color: rgba(15, 23, 42, 0.5);
    border-radius: 0.75rem;
    padding: 1rem;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
}

.img-placeholder {
    width: 100%;
    aspect-ratio: 16/9;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

#thumbPreviewImg {
    width: 100%;
    border-radius: 0.5rem;
    border: 1px solid var(--glass-border);
    object-fit: cover;
}

/* Link List */
.links-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.link-card {
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    transition: all 0.2s ease;
}

.link-card:hover {
    border-color: var(--accent-primary);
    background: rgba(15, 23, 42, 0.8);
}

.link-info {
    flex: 1;
    overflow: hidden;
}

.link-info .link-url {
    color: var(--text-primary);
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: block;
    margin-bottom: 0.25rem;
}

.link-info .link-type {
    color: var(--accent-primary);
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Batch Checkboxes */
.diag-checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.05);
}

.diag-checkbox-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

.diag-checkbox-item input[type="checkbox"] {
    width: 1.2rem;
    height: 1.2rem;
    cursor: pointer;
    accent-color: var(--accent-primary);
}

.diag-checkbox-item label {
    font-size: 0.9rem;
    color: var(--text-primary);
    cursor: pointer;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Responsive */
@media (max-width: 1024px) {
    .row {
        grid-template-columns: 1fr;
        gap: 0;
    }

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

    .split-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .main-content {
        margin-left: 0;
        padding: 1.5rem;
    }
}

/* Inline Diagnostic Player */
.video-preview-player {
    width: 100%;
    margin-top: 1rem;
    border-radius: 0.5rem;
    background-color: #000;
    max-height: 250px;
    border: 1px solid var(--border-color);
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}