:root {
    --bg-base: #0f1115;
    --bg-surface: #1a1d24;
    --bg-surface-hover: #22262f;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #2e3341;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --sidebar-width: 280px;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --font-sans: 'Inter', sans-serif;
    --font-heading: 'Outfit', sans-serif;
}

[data-theme="light"] {
    --bg-base: #f1f5f9;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f8fafc;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.5;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-surface);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 10;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.brand-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
}

.search-box {
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    background-color: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-sans);
    transition: border-color 0.2s;
}

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

.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    width: 18px;
    height: 18px;
}

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

.nav-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    text-align: left;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-item i {
    width: 18px;
    height: 18px;
}

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

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

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 2rem 3rem;
    max-width: 1000px;
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.main-header h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    margin-bottom: 0.25rem;
}

.main-header p {
    color: var(--text-secondary);
}

.icon-btn {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

.icon-btn:hover {
    background: var(--bg-surface-hover);
}

/* Tabs */
.tab-pane {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-pane.active {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

/* Cards */
.script-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.script-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.2);
    border-color: var(--primary);
}

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

.card-title-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.card-title-group h3 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
}

.badge {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.badge-primary { background: rgba(59, 130, 246, 0.15); color: var(--primary); }
.badge-warning { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.badge-success { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.badge-danger { background: rgba(239, 68, 68, 0.15); color: var(--danger); }
.badge-secondary { background: rgba(100, 116, 139, 0.15); color: var(--text-secondary); }

.copy-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--bg-base);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.copy-btn i {
    width: 16px;
    height: 16px;
}

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

.script-objective {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.script-content {
    width: 100%;
    min-height: 120px;
    background-color: var(--bg-base);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 1rem;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    line-height: 1.6;
    resize: none;
}

.script-content:focus {
    outline: none;
    border-color: var(--text-secondary);
}

/* Alert Box */
.alert-box {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--warning);
    padding: 1rem 1.5rem;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-bottom: 1.5rem;
}

.alert-box i {
    color: var(--warning);
}

/* Tools Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.tool-card {
    background: var(--bg-base);
    border: 1px dashed var(--border-color);
    padding: 1.25rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
}

.tool-card:hover {
    border-color: var(--primary);
    border-style: solid;
}

.tool-card h4 {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

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

/* Data Table */
.table-container {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.data-table th,
.data-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background-color: var(--bg-base);
    font-weight: 600;
    font-size: 0.9rem;
}

.data-table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Checklist */
.checklist {
    list-style: none;
}

.checklist li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.checklist input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--success);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.3);
    font-weight: 500;
    transform: translateY(150%);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 100;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        padding-bottom: 1rem;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .main-content {
        margin-left: 0;
        padding: 1.5rem;
    }
}