/* ==================== CSS Variables ==================== */
:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;

    --bg-primary: #0f172a;
    --bg-secondary: #141d30;
    --bg-tertiary: #334155;
    --bg-hover: #475569;

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border-color: #334155;
    --border-hover: #475569;
}

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

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

/* ==================== Layout ==================== */
.app-container {
    display: flex;
    height: 100vh;
}

/* ==================== Sidebar ==================== */
.sidebar {
    width: 280px;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 1.5rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Offcanvas header styles */
.offcanvas-header {
    padding: 1rem 1.25rem;
}

.offcanvas-header .btn-close {
    background-color: transparent;
    border: none;
    opacity: 0.8;
}

.offcanvas-header .btn-close:hover {
    opacity: 1;
}

.offcanvas-body {
    padding: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.31rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.logo i {
    color: var(--primary);
    font-size: 1.75rem;
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
}

.sidebar-content::-webkit-scrollbar {
    width: 6px;
}

.sidebar-content::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.sidebar-content::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

.sidebar-content::-webkit-scrollbar-thumb:hover {
    background: var(--bg-hover);
}

/* ==================== Navigation Item ==================== */
.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem;
    margin-bottom: 0.25rem;
    cursor: pointer;
    transition: background-color 0.2s;
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-item.active {
    background-color: var(--primary);
    color: var(--text-primary);
}

.nav-item i {
    font-size: 1.125rem;
}

a.nav-item.disabled {
    pointer-events: none;
    opacity: 0.5;
    cursor: not-allowed;
    text-decoration: none;
}

.divider {
    height: 1px;
    background-color: var(--border-color);
    margin: 0.75rem 1rem;
}

/* ==================== Channel Groups ==================== */
.channel-group {
    margin-bottom: 0.5rem;
}

.channel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.625rem 1.25rem;
    cursor: pointer;
    transition: background-color 0.2s;
    user-select: none;
    border-left: 3px solid transparent;
}

.channel-header:hover {
    background-color: var(--bg-tertiary);
}

.channel-header.active {
    background-color: var(--bg-tertiary);
    border-left-color: var(--primary);
}

.channel-header.active .channel-name {
    color: var(--text-primary);
}

.channel-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
}

.channel-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
    flex-shrink: 0;
}

.channel-toggle {
    color: var(--text-secondary);
    transition: transform 0.2s;
}

.channel-toggle.expanded {
    transform: rotate(90deg);
}

/* ==================== Stream Items ==================== */
.streams-list {
    display: none;
    padding: 0.25rem 0;
}

.streams-list.show {
    display: block;
}

.stream-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 1.25rem 0.625rem 3rem;
    cursor: pointer;
    transition: background-color 0.2s;
    text-decoration: none;
    color: var(--text-secondary);
    border-left: 3px solid transparent;
}

.stream-item:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.stream-item.active {
    background-color: var(--bg-tertiary);
    border-left-color: var(--primary);
    color: var(--text-primary);
}

.stream-status {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.stream-status.live {
    background-color: var(--success);
    animation: pulse 2s ease-in-out infinite;
}

.stream-status.offline {
    background-color: var(--text-muted);
}

@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    50% { opacity: 0.8; box-shadow: 0 0 0 4px rgba(16, 185, 129, 0); }
}

.stream-name {
    font-size: 1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ==================== Add Buttons ==================== */
.add-stream-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    margin: 0.25rem 1rem 0.25rem 3rem;
    background-color: transparent;
    border: 1px dashed var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
    width: -webkit-fill-available;
}

.add-stream-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* ==================== Main Content ==================== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ==================== Topbar ==================== */
.topbar {
    display: none;
    height: 75px;
    border-bottom: 1px solid var(--border-color);
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    margin-bottom: 1rem;
}

.topbar-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.31rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.topbar-logo i {
    color: var(--primary);
    font-size: 1.75rem;
}

.mobile-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 2rem;
    cursor: pointer;
    padding: 1rem;
}

.content-area {
    flex: 1;
    overflow-y: auto;
    padding: 2rem 3rem;
}

.content-area::-webkit-scrollbar {
    width: 8px;
}

.content-area::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

.content-area::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

/* ==================== Back Button ==================== */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 1.5rem;
    transition: color 0.2s;
}

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

/* ==================== Dashboard Header ==================== */
.dashboard-header {
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.dashboard-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

/* ==================== Buttons ==================== */
.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    border: none;
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
}

.btn-icon:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.btn-icon.danger:hover {
    background-color: rgba(239, 68, 68, 0.1);
    border-color: var(--danger);
    color: var(--danger);
}

.btn-icon.success:hover {
    background-color: rgba(16, 185, 129, 0.1);
    border-color: var(--success);
    color: var(--success);
}

/* ==================== Stream Cards ==================== */
.stream-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: .875rem 1.5rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stream-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: var(--success);
}

.stream-card.inactive::before {
    background: var(--text-muted);
}

.stream-card:hover {
    border-color: var(--border-hover);
}

.stream-card-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.stream-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stream-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}

.stream-channel {
    color: var(--text-secondary);
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.375rem;
    margin: 0;
}

.stream-meta {
    color: var(--text-secondary);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.375rem;
    margin: 0;
}

.live-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: rgba(16, 185, 129, 0.15);
    color: var(--success);
    padding: 0.375rem 0.75rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.7rem;
    letter-spacing: 0.5px;
}

.inactive-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: rgba(100, 116, 139, 0.15);
    color: var(--text-muted);
    padding: 0.375rem 0.75rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.7rem;
    letter-spacing: 0.5px;
}

.stream-stats {
    display: flex;
    gap: 2rem;
    margin-left: auto;
    align-items: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.stream-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 1.5rem;
}

/* ==================== Channel List/Cards ==================== */
.channel-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.channel-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: .875rem 1.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.channel-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: var(--primary);
    opacity: .5;
}

.channel-card:hover {
    border-color: var(--border-hover);
}

.channel-card-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.channel-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.channel-name {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}

.channel-date {
    color: var(--text-secondary);
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.375rem;
    margin: 0;
}

.channel-stats {
    display: flex;
    gap: 2rem;
    margin-left: auto;
}

.stat-box {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.stat-value.success {
    color: var(--success);
}

.stat-value.muted {
    color: var(--text-secondary);
}

.channel-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 1.5rem;
}

/* ==================== Streams Section ==================== */
.streams-section {
    margin-bottom: 2rem;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

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

.empty-icon {
    width: 120px;
    height: 120px;
    background-color: var(--bg-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    color: var(--text-muted);
    font-size: 3rem;
}

.empty-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

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

/* ==================== Modal ==================== */
.modal-content {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
}

.modal-footer {
    border-top: 1px solid var(--border-color);
}

.btn-close {
    filter: invert(1);
    opacity: 0.8;
}

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

.form-control {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.625rem 1rem;
    border-radius: 8px;
}

.form-control:focus {
    background-color: var(--bg-tertiary);
    border-color: var(--primary);
    color: var(--text-primary);
    box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.25);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-secondary:hover {
    background-color: var(--bg-hover);
    border-color: var(--border-hover);
}

.form-check-input {
    background-color: var(--bg-tertiary);
    border-color: var(--border-color);
}

.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

.form-check-label {
    color: var(--text-primary);
}

/* ==================== Upload Zone ==================== */
.upload-zone {
    background-color: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 2rem;
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--primary);
    background-color: rgba(99, 102, 241, 0.05);
}

.upload-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0rem;
    color: var(--text-primary);
}

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

/* ==================== Storage Stats ==================== */
.storage-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

.stat-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.stat-card > i {
    font-size: 2rem;
    color: var(--primary);
}

.stat-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-number {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ==================== Files List ==================== */
.files-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.files-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.file-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    transition: all 0.3s ease;
}

.file-item:hover {
    border-color: var(--border-hover);
}

.file-icon {
    width: 48px;
    height: 48px;
    background-color: rgba(99, 102, 241, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.file-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.file-name {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}

.file-meta {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.file-meta span {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.file-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.file-actions.disabled {
    pointer-events: none;
    opacity: 0.5;
    cursor: not-allowed;
    text-decoration: none;
}

/* ==================== Responsive - Storage ==================== */
@media (max-width: 767px) {
    .upload-zone {
        padding: 2rem 1rem;
    }

    .storage-stats {
        grid-template-columns: 1fr;
    }

    .file-item {
        flex-wrap: wrap;
    }

    .file-meta {
        gap: 1rem;
    }
}

/* ==================== Responsive ==================== */
@media (max-width: 767px) {
    .sidebar {
        background-color: var(--bg-secondary);
    }

    /* Sidebar mobile behavior */
    .topbar {
        display: flex;
    }

    .content-area {
        padding: 1rem;
    }

    .dashboard-title {
        font-size: 1.35rem;
    }

    .stream-card-header,
    .channel-card-header {
        flex-wrap: wrap;
    }

    .stream-stats,
    .channel-stats {
        margin-left: 0;
        width: 100%;
    }

    .stream-stats {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 1rem;
    }

    .stat-item,
    .stat-box {
        flex: 0 0 auto;
    }

    .channel-actions {
        margin-left: auto;
    }

    .btn-primary {
        width: 100%;
        justify-content: center;
    }
}