:root {
    --bg-deep: #090d16;
    --bg-sidebar: #0f1524;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --border-color: rgba(255, 255, 255, 0.08);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent-primary: #06b6d4; /* Cyan */
    --accent-secondary: #a855f7; /* Purple */
    
    --google-ads: #eab308;
    --meta-ads: #2563eb;
    --google-admanager: #10b981;
    
    --code-bg: #0b0f19;
    --success: #10b981;
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    display: flex;
    min-height: 100vh;
}

/* --- LAYOUT STRUCTURE --- */

/* Sidebar */
.sidebar {
    width: 300px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    padding: 2rem 1.5rem;
    transition: transform var(--transition-speed) ease;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
    text-decoration: none;
}

.sidebar-logo {
    max-height: 40px;
    width: auto;
    object-fit: contain;
    display: block;
}

.sidebar-brand-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #fff;
    font-size: 1.2rem;
    box-shadow: 0 0 20px rgba(6, 182, 212, 0.4);
}

.sidebar-brand-name {
    font-size: 1.35rem;
    font-weight: 700;
    background: linear-gradient(to right, #ffffff, #c0c2c5);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-brand-name span {
    background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.menu-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    text-align: left;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.nav-item-btn svg {
    width: 18px;
    height: 18px;
    transition: stroke var(--transition-speed) ease;
}

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

.nav-item-btn.active {
    color: #fff;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(168, 85, 247, 0.15));
    border-left: 3px solid var(--accent-primary);
    box-shadow: inset 0 0 15px rgba(255, 255, 255, 0.01);
}

.nav-item-btn.active-google {
    border-left-color: var(--google-ads);
    background: rgba(234, 179, 8, 0.08);
}

.nav-item-btn.active-meta {
    border-left-color: var(--meta-ads);
    background: rgba(37, 99, 235, 0.08);
}

.nav-item-btn.active-gam {
    border-left-color: var(--google-admanager);
    background: rgba(16, 185, 129, 0.08);
}

.sidebar-footer {
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.sidebar-footer a {
    color: var(--accent-primary);
    text-decoration: none;
}

.sidebar-footer a:hover {
    text-decoration: underline;
}

/* Content Area */
.main-content {
    margin-left: 300px;
    flex-grow: 1;
    padding: 3rem 4rem;
    max-width: 1200px;
    width: calc(100% - 300px);
    position: relative;
}

/* Decorative Background Elements (Glowing orbs) */
.glow-orb-1 {
    position: absolute;
    top: 10%;
    right: 15%;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.08) 0%, rgba(0, 0, 0, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

.glow-orb-2 {
    position: absolute;
    bottom: 20%;
    left: 10%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.08) 0%, rgba(0, 0, 0, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

/* --- TYPOGRAPHY & BLOCKS --- */
h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin: 2.5rem 0 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    color: var(--text-primary);
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1.5rem 0 0.75rem;
    color: var(--text-primary);
}

p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
}

code {
    font-family: 'Fira Code', monospace;
    background-color: var(--code-bg);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9rem;
    color: var(--accent-primary);
    border: 1px solid var(--border-color);
}

/* Hero banner for Home page */
.hero-banner {
    padding: 3.5rem 2.5rem;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.1) 0%, rgba(168, 85, 247, 0.1) 100%);
    border: 1px solid var(--border-color);
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.hero-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, transparent 60%);
    pointer-events: none;
}

.hero-banner h1 {
    background: linear-gradient(to right, #fff, #a855f7);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 2.75rem;
    margin-bottom: 1rem;
}

.hero-banner p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin-bottom: 1.5rem;
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border: none;
    border-radius: 8px;
    color: #fff;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
    transition: all var(--transition-speed) ease;
}

.hero-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.5);
}

/* Cards Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.feature-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.75rem;
    transition: all var(--transition-speed) ease;
}

.feature-card:hover {
    background-color: var(--bg-card-hover);
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.15);
}

.feature-icon-wrapper {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background-color: rgba(255, 255, 255, 0.04);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    border: 1px solid var(--border-color);
}

.feature-icon-wrapper svg {
    width: 24px;
    height: 24px;
    stroke: var(--accent-primary);
}

.feature-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #fff;
}

.feature-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* --- API ENDPOINT DOCUMENTATION --- */
.endpoint-badge-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.badge-method {
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    background-color: #2563eb;
    color: #fff;
}

.badge-method.post {
    background-color: #2563eb;
}

.badge-method.get {
    background-color: #10b981;
}

.endpoint-url {
    font-family: 'Fira Code', monospace;
    font-size: 1.05rem;
    color: var(--accent-primary);
}

.params-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    text-align: left;
}

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

.params-table th {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    background-color: rgba(255, 255, 255, 0.02);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.params-table td {
    font-size: 0.95rem;
    color: var(--text-secondary);
    vertical-align: top;
}

.param-name {
    font-family: 'Fira Code', monospace;
    font-weight: 600;
    color: #fff;
}

.param-type {
    font-size: 0.8rem;
    color: var(--accent-secondary);
    font-family: 'Fira Code', monospace;
}

.param-req {
    font-size: 0.8rem;
    color: #ef4444;
    font-weight: 600;
}

/* --- CODE VIEWER AND COPY --- */
.code-container {
    position: relative;
    background-color: var(--code-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    margin: 1.5rem 0;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1.25rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.btn-copy {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
    transition: color var(--transition-speed) ease;
}

.btn-copy:hover {
    color: #fff;
}

.btn-copy svg {
    width: 14px;
    height: 14px;
}

.code-block {
    display: block;
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    padding: 1.25rem;
    overflow-x: auto;
    color: #cbd5e1;
    white-space: pre;
}

/* JSON syntax highlighting approximation */
.code-block .json-key { color: #818cf8; }
.code-block .json-str { color: #34d399; }
.code-block .json-num { color: #fb7185; }
.code-block .json-bool { color: #f472b6; }

/* --- REQUEST SIMULATOR --- */
.simulator {
    background-color: rgba(255, 255, 255, 0.01);
    border: 1px dashed var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin-top: 3rem;
}

.simulator-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.simulator-title svg {
    width: 20px;
    height: 20px;
    stroke: var(--accent-primary);
}

.sim-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.sim-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.sim-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.sim-input, .sim-select {
    background-color: var(--code-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.6rem 0.8rem;
    color: #fff;
    font-family: inherit;
    font-size: 0.95rem;
    width: 100%;
    transition: border-color var(--transition-speed) ease;
}

.sim-input:focus, .sim-select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

/* Mobile responsive */
@media (max-width: 900px) {
    .sidebar {
        width: 100%;
        position: relative;
        bottom: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 1.5rem;
    }
    .sidebar-brand {
        margin-bottom: 1.5rem;
    }
    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 2rem;
    }
}

/* Submenu Navigation */
.nav-submenu {
    list-style: none;
    margin-left: 2.3rem;
    margin-top: 0.35rem;
    display: none;
    flex-direction: column;
    gap: 0.4rem;
    border-left: 1px dashed var(--border-color);
    padding-left: 0.85rem;
    margin-bottom: 0.5rem;
}
.nav-submenu.active-submenu {
    display: flex;
}
.nav-submenu-item {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.15rem 0;
    transition: color var(--transition-speed) ease;
}
.nav-submenu-item:hover {
    color: var(--text-primary);
}
.nav-submenu-item.active {
    color: var(--google-admanager);
    font-weight: 600;
}