/* ============================================
   SerpWatch API Documentation - Main Stylesheet
   Stripe-inspired design system
   ============================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
    /* Colors - Brand palette */
    --color-primary: #3784f7;
    --color-primary-dark: #2970d9;
    --color-primary-light: #5a9bf9;

    --color-text: #1a1a2e;
    --color-text-secondary: #4a4a68;
    --color-text-muted: #8792a2;

    --color-bg: #ffffff;
    --color-bg-secondary: #f7f9fc;
    --color-bg-code: #1e1e2e;

    --color-border: #e6e8eb;
    --color-border-light: #f0f2f5;

    --color-success: #30d158;
    --color-warning: #ff9f0a;
    --color-error: #ff453a;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', Menlo, Consolas, monospace;

    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-8: 3rem;
    --space-10: 4rem;

    /* Layout */
    --sidebar-width: 260px;
    --header-height: 60px;
    --content-max-width: 800px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Header --- */
.docs-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1400px;
    height: 100%;
    margin: 0 auto;
    padding: 0 var(--space-5);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    text-decoration: none;
    color: var(--color-text);
}

.logo-text {
    font-weight: 600;
    font-size: var(--font-size-lg);
}

.version-badge {
    padding: var(--space-1) var(--space-2);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-muted);
}

.header-nav {
    display: flex;
    gap: var(--space-4);
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-primary);
}

.nav-link--secondary {
    color: var(--color-text-muted);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* Mobile menu toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--space-2);
    cursor: pointer;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    margin: 5px 0;
    transition: var(--transition-fast);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

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

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

/* Ensure button text color isn't overridden by link styles */
.docs-article .btn--primary {
    color: white;
}

.btn--secondary {
    background: var(--color-bg-secondary);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

/* --- Layout --- */
.docs-layout {
    display: flex;
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
}

/* --- Sidebar --- */
.docs-sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--color-bg);
    border-right: 1px solid var(--color-border);
    overflow-y: auto;
    padding: var(--space-5);
    z-index: 50;
}

.sidebar-search {
    margin-bottom: var(--space-5);
}

.search-input {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    background: var(--color-bg-secondary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 91, 255, 0.1);
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

.nav-section {
    margin-bottom: var(--space-5);
}

.nav-section-title {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-2);
}

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

.nav-item {
    display: block;
    padding: var(--space-2) var(--space-3);
    margin: 0 calc(-1 * var(--space-3));
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast), color var(--transition-fast);
}

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

.nav-item.active {
    background: rgba(99, 91, 255, 0.1);
    color: var(--color-primary);
    font-weight: 500;
}

/* --- Main Content --- */
.docs-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: var(--space-8) var(--space-10);
    max-width: calc(100% - var(--sidebar-width));
}

.docs-article {
    max-width: var(--content-max-width);
    margin: 0 auto;
}

/* --- Typography --- */
.docs-article h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
    line-height: var(--line-height-tight);
    color: var(--color-text);
}

.docs-article h2 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-top: var(--space-8);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
}

.docs-article h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-top: var(--space-6);
    margin-bottom: var(--space-3);
    color: var(--color-text);
}

.docs-article h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-top: var(--space-5);
    margin-bottom: var(--space-2);
    color: var(--color-text);
}

.docs-article p {
    margin-bottom: var(--space-4);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}

.docs-article ul, .docs-article ol {
    margin-bottom: var(--space-4);
    padding-left: var(--space-5);
}

.docs-article li {
    margin-bottom: var(--space-2);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}

.docs-article a {
    color: var(--color-primary);
    text-decoration: none;
}

.docs-article a:hover {
    text-decoration: underline;
}

/* Cards should not have underline on hover */
.docs-article a.card,
.docs-article a.card:hover {
    text-decoration: none;
}

.docs-article strong {
    font-weight: 600;
    color: var(--color-text);
}

/* Lead paragraph */
.lead {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
    line-height: var(--line-height-relaxed);
}

/* Horizontal rule */
.docs-article hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--space-8) 0;
}

/* --- Pagination --- */
.docs-pagination {
    display: flex;
    justify-content: space-between;
    margin-top: var(--space-10);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
}

.pagination-link {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    padding: var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    max-width: 45%;
}

.pagination-link:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
}

.pagination-link--prev {
    align-items: flex-start;
}

.pagination-link--next {
    align-items: flex-end;
    margin-left: auto;
}

.pagination-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pagination-title {
    font-weight: 500;
    color: var(--color-text);
    margin-top: var(--space-1);
}

/* --- Footer --- */
.docs-footer {
    margin-left: var(--sidebar-width);
    padding: var(--space-5);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--content-max-width);
    margin: 0 auto;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.footer-nav {
    display: flex;
    gap: var(--space-4);
}

.footer-nav a {
    color: var(--color-text-muted);
    text-decoration: none;
}

.footer-nav a:hover {
    color: var(--color-primary);
}

/* --- Responsive Design --- */
@media (max-width: 1024px) {
    .header-nav {
        display: none;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .docs-sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }

    .docs-sidebar.open {
        transform: translateX(0);
    }

    .docs-content {
        margin-left: 0;
        max-width: 100%;
        padding: var(--space-5);
    }

    .docs-footer {
        margin-left: 0;
    }

    .docs-pagination {
        flex-direction: column;
        gap: var(--space-4);
    }

    .pagination-link {
        max-width: 100%;
    }

    .pagination-link--next {
        align-items: flex-start;
    }
}

@media (max-width: 640px) {
    :root {
        --font-size-3xl: 1.75rem;
        --font-size-2xl: 1.25rem;
    }

    .header-container {
        padding: 0 var(--space-4);
    }

    .header-right {
        display: none;
    }

    .docs-article h1 {
        font-size: var(--font-size-2xl);
    }

    .footer-container {
        flex-direction: column;
        gap: var(--space-3);
        text-align: center;
    }
}