:root {
    --bg-color: #0f172a;
    --sidebar-color: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
    --card-bg: rgba(30, 41, 59, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
}

/* Light Mode Overrides */
body.light-mode {
    --bg-color: #f1f5f9;
    --sidebar-color: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --card-bg: rgba(255, 255, 255, 0.8);
    --border-color: rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Sidebar Styles */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-color);
    padding: 2rem 1rem;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    position: fixed;
    height: 100vh;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    list-style: none;
}

.nav-links li {
    margin-bottom: 0.5rem;
}

.nav-links a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0.8rem 1rem;
    text-decoration: none;
    color: var(--text-secondary);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.nav-links a i {
    font-size: 1.2rem;
}

.nav-links a:hover, .nav-links a.active {
    background: rgba(56, 189, 248, 0.1);
    color: var(--text-primary);
}

.nav-links a.active {
    border-left: 4px solid #38bdf8;
}

/* Content Styles */
.content {
    margin-left: 260px;
    padding: 2rem;
    width: calc(100% - 260px);
    transition: background-color 0.3s ease;
}

.page {
    display: none;
    animation: fadeIn 0.5s ease forwards;
}

.page.active {
    display: block;
}

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

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.user-profile img {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    border: 2px solid #38bdf8;
}

/* Grid & Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    position: relative;
    display: flex;
    align-items: center;
    gap: 1rem;
    backdrop-filter: blur(10px);
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-icon.blue { background: rgba(56, 189, 248, 0.2); color: #38bdf8; }
.stat-icon.purple { background: rgba(168, 85, 247, 0.2); color: #a855f7; }
.stat-icon.pink { background: rgba(236, 72, 153, 0.2); color: #ec4899; }

.stat-info h3 { font-size: 1.5rem; }
.stat-info p { color: var(--text-secondary); font-size: 0.9rem; }

.trend {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-weight: bold;
}
.trend.positive { color: var(--success); }
.trend.negative { color: var(--danger); }

.main-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
}

.card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.full-width { grid-column: span 2; }

h2 { margin-bottom: 1.5rem; font-weight: 600; }

/* Activity List */
.activity-list { list-style: none; }
.activity-list li {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
}

.text-green { color: var(--success); }
.text-blue { color: #38bdf8; }
.text-yellow { color: var(--warning); }
.text-purple { color: #a855f7; }

/* Task Manager */
.task-manager .task-input {
    display: flex;
    gap: 10px;
    margin-bottom: 1.5rem;
}

.task-manager input {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 0.8rem 1rem;
    border-radius: 10px;
    color: inherit;
}

.task-manager button {
    background: var(--accent-gradient);
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 10px;
    color: white;
    cursor: pointer;
    font-weight: bold;
}

.task-list { list-style: none; }
.task-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.03);
    margin-bottom: 0.5rem;
    border-radius: 10px;
}

.done-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
}

/* Data Table Styles */
.table-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 250px;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.search-box input {
    width: 100%;
    padding: 0.8rem 1rem 0.8rem 2.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
}

.filter-group select {
    padding: 0.8rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
}

.table-container {
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

#logsTable {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

#logsTable th {
    padding: 1rem;
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
}

#logsTable th:hover {
    color: var(--text-primary);
}

#logsTable td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

#logsTable tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.badge-status {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
}

.status-completed { background: rgba(34, 197, 94, 0.2); color: #22c55e; }
.status-inprogress { background: rgba(56, 189, 248, 0.2); color: #38bdf8; }
.status-failed { background: rgba(239, 68, 68, 0.2); color: #ef4444; }

.table-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.pagination button {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 0.8rem;
    border-radius: 8px;
    cursor: pointer;
}

.pagination button:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.page-numbers {
    display: flex;
    gap: 0.3rem;
}

.page-num {
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    cursor: pointer;
}

.page-num.active {
    background: var(--accent-gradient);
    color: white;
}

/* Marketing Pages Styles */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    text-align: center;
    padding: 3rem 2rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    align-items: start;
}

.pricing-card {
    text-align: center;
    padding: 3rem 2rem;
    position: relative;
}

.pricing-card.featured {
    border: 2px solid #38bdf8;
    transform: scale(1.05);
}

.badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-gradient);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: bold;
}

.price {
    font-size: 3rem;
    font-weight: 800;
    margin: 1rem 0;
}

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

.pricing-list {
    list-style: none;
    margin: 2rem 0;
    text-align: left;
}

.pricing-list li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
}

.card-btn {
    width: 100%;
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-primary);
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.card-btn.primary {
    background: var(--accent-gradient);
    border: none;
    color: white;
}

/* Settings */
.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.setting-item h3 { font-size: 1.1rem; }
.setting-item p { color: var(--text-secondary); font-size: 0.9rem; }

/* Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.switch input { opacity: 0; width: 0; height: 0; }

.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: #475569;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px; width: 18px;
    left: 3px; bottom: 3px;
    background-color: white;
    transition: .4s;
}

input:checked + .slider { background: #38bdf8; }
input:checked + .slider:before { transform: translateX(26px); }
.slider.round { border-radius: 34px; }
.slider.round:before { border-radius: 50%; }

/* Responsive */
@media (max-width: 1024px) {
    .main-grid { grid-template-columns: 1fr; }
    .full-width { grid-column: span 1; }
    .pricing-card.featured { transform: scale(1); }
}

@media (max-width: 768px) {
    .sidebar { width: 70px; padding: 2rem 0.5rem; align-items: center; }
    .logo span, .nav-links a span { display: none; }
    .content { margin-left: 70px; width: calc(100% - 70px); }
}