:root {
    --bg-color: #0f1117;
    --surface-color: #1a1d27;
    --border-color: #2a2d3e;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --accent-color: #10b981;
    --accent-hover: #059669;
    --code-bg: #161b22;
    --sidebar-width: 300px;
    --header-height: 5px;
    --warning-border: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --success-border: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --info-border: #3b82f6;
    --info-bg: rgba(59, 130, 246, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --bg-color: #ffffff;
    --surface-color: #f8fafc;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent-color: #10b981;
    --code-bg: #f1f5f9;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.8;
    font-size: 18px;
    transition: var(--transition);
}

/* Layout */
.wrapper {
    display: flex;
    min-height: 100vh;
}

/* Navigation Sidebar */
aside {
    width: var(--sidebar-width);
    height: 100vh;
    position: sticky;
    top: 0;
    background-color: var(--surface-color);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    overflow-y: auto;
    z-index: 100;
}

aside h2 {
    font-size: 1.25rem;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

nav a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding: 0.6rem 0.8rem;
    border-radius: 6px;
    display: block;
    transition: var(--transition);
}

nav a:hover, nav a.active {
    background-color: var(--bg-color);
    color: var(--accent-color);
}

nav a.active {
    font-weight: 600;
    border-left: 3px solid var(--accent-color);
    padding-left: calc(0.8rem - 3px);
}

/* Main Content */
main {
    flex: 1;
    padding: 4rem 10%;
    max-width: 1200px;
}

/* Common Components */
.box {
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    border-left: 4px solid transparent;
}

.what-is-this {
    background-color: var(--info-bg);
    border-left-color: var(--info-border);
}

.warning {
    background-color: var(--warning-bg);
    border-left-color: var(--warning-border);
}

.success {
    background-color: var(--success-bg);
    border-left-color: var(--success-border);
}

.code-block {
    position: relative;
    margin-bottom: 2rem;
    border-radius: 12px;
    overflow: hidden;
    background-color: var(--code-bg);
    border: 1px solid var(--border-color);
}

.code-header {
    padding: 0.5rem 1rem;
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copy-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    border-radius: 4px;
    cursor: pointer;
}

.copy-btn:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
}

/* Progress Bar */
#progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 5px;
    background: var(--accent-color);
    width: 0%;
    z-index: 1000;
}

/* Dashboards Card Style */
.phase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.phase-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 16px;
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.phase-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.1);
}

.phase-card h3 {
    color: var(--accent-color);
    font-size: 1.5rem;
}

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