/* =======================================
   Core Patterns Page — Additional Styles
   Extends library.css
   ======================================= */

/* Explainer section */
.explainer-section {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border);
}

.explainer-section .intro {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    box-sizing: border-box;
}

@media (min-width: 1200px) {
    .explainer-section .intro {
        padding: 0 4rem;
    }
}

@media (min-width: 1600px) {
    .explainer-section .intro {
        padding: 0 6rem;
    }
}

.explainer-section .intro-header h1 {
    margin: 0 0 1.5rem;
    font-size: clamp(2rem, 4vw, 2.5rem);
    line-height: 1.2;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
}

.explainer-section .intro-body p {
    margin: 0 0 1.5rem;
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text);
}

.explainer-section .intro-body p:last-child {
    margin-bottom: 0;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
    font-weight: 500;
    color: var(--muted);
    font-size: 1rem;
}


/* Add padding for wide layouts */
@media (min-width: 1200px) {
    .domain-section.card {
        padding: 0 2rem;
    }
}

@media (min-width: 1600px) {
    .domain-section.card {
        padding: 0 4rem;
    }
}

.domain-section:last-child {
    margin-bottom: 0;
}

/* Collapsible header */
.collapsible-header {
    cursor: pointer;
    user-select: none;
    position: relative;
    padding-right: 3rem;
}

.collapsible-header:hover {
    background: color-mix(in oklab, var(--accent-weak) 50%, var(--panel));
}

.domain-section .card-header:hover {
    background: color-mix(in oklab, var(--accent-weak) 50%, var(--panel));
}

.collapse-icon {
    position: absolute;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    transition: transform 0.2s ease;
    font-size: 0.875rem;
    color: var(--muted);
}

.domain-section.collapsed .collapse-icon {
    transform: translateY(-50%) rotate(-90deg);
}

.domain-section .card-header {
    text-align: center;
    margin-left: 0;
    margin-right: 0;
    margin-top: 0;
    margin-bottom: 0;
    background: linear-gradient(135deg, color-mix(in oklab, var(--accent-weak) 40%, var(--panel)), color-mix(in oklab, var(--accent-weak) 20%, var(--panel)));
    border-top-left-radius: var(--radius, 0.75rem);
    border-top-right-radius: var(--radius, 0.75rem);
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    padding-block: 1.5rem;
    border-bottom: 2px solid color-mix(in oklab, var(--accent) 15%, transparent);
}

.domain-section.collapsed .card-header {
    border-bottom-left-radius: var(--radius, 0.75rem);
    border-bottom-right-radius: var(--radius, 0.75rem);
}

/* Make header bleed to card edges on wide layouts */
@media (min-width: 1200px) {
    .domain-section .card-header {
        margin-left: -2rem;
        margin-right: -2rem;
        padding-left: 2rem;
        padding-right: 2rem;
        width: calc(100% + 4rem);
    }
}

@media (min-width: 1600px) {
    .domain-section .card-header {
        margin-left: -4rem;
        margin-right: -4rem;
        padding-left: 4rem;
        padding-right: 4rem;
        width: calc(100% + 8rem);
    }
}

.domain-section .card-header h2 {
    margin: 0;
    font-size: clamp(1.5rem, 2.5vw, 1.75rem);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.domain-what,
.domain-how {
    margin: 0.5rem 0;
    font-size: 1rem;
    color: var(--text);
    font-weight: 400;
    line-height: 1.6;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.domain-what {
    font-weight: 400;
}

.domain-how {
    opacity: 0.65;
    font-size: 0.9rem;
}

.domain-what strong,
.domain-how strong {
    color: var(--accent);
    font-weight: 600;
}

.domain-meta {
    margin-top: 0.75rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.pattern-count {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.pattern-count-patterns {
    background: color-mix(in oklab, var(--good) 15%, transparent);
    color: var(--good);
    border: 1px solid color-mix(in oklab, var(--good) 30%, transparent);
}

.pattern-count-antipatterns {
    background: color-mix(in oklab, var(--bad) 15%, transparent);
    color: var(--bad);
    border: 1px solid color-mix(in oklab, var(--bad) 30%, transparent);
}

/* Collapsible body */
.collapsible-body {
    max-height: 10000px;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.2s ease;
    opacity: 1;
}

.domain-section.collapsed .collapsible-body {
    max-height: 0;
    opacity: 0;
    padding-top: 0;
    padding-bottom: 0;
}

/* Pattern grid */
.pattern-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 0.75rem;
    margin-block: 0.5rem;
}

/* Pattern cards - simplified styling for grid items */
.pattern-card {
    text-decoration: none;
    color: inherit;
    display: block;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.pattern-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    border-color: color-mix(in oklab, var(--accent) 20%, var(--border));
    transform: translateY(-2px);
}

.pattern-card.anti-pattern {
    border-left: 4px solid color-mix(in oklab, var(--bad) 30%, transparent);
}

.pattern-card.anti-pattern .pattern-title {
    color: color-mix(in oklab, var(--bad) 70%, var(--text));
}

.pattern-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.pattern-synopsis {
    font-size: 0.9375rem;
    color: var(--muted);
    line-height: 1.5;
    margin-bottom: 0.75rem;
}

.pattern-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 0 0 0.5rem 0;
}

.pattern-tags .tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    background: var(--accent-weak);
    color: var(--muted);
    border-radius: 4px;
}

.pattern-type-group {
    margin-bottom: 2rem;
}

.pattern-type-group:last-child {
    margin-bottom: 0;
}

.pattern-type-header {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 1rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border);
}

/* Ensure pattern cards in grid use card styling properly */
.pattern-grid .card {
    margin: 0; /* Remove default card margin in grid */
    height: 100%; /* Make cards equal height in grid */
    display: flex;
    flex-direction: column;
}

.pattern-grid .card .card-body {
    flex: 1; /* Allow card body to grow */
    display: flex;
    flex-direction: column;
}

/* Footer styling */
footer {
    text-align: center;
    padding: 1rem;
    background-color: var(--surface);
    color: var(--text);
    border-top: 1px solid var(--border);
    margin-top: auto;
}

/* Override body to have fixed height for scrollable content */
body {
    height: 100vh;
    overflow: hidden; /* Prevent body scroll, only main scrolls */
}

/* Header adjustments for core page */
body > header {
    position: relative; /* Override sticky from library.css */
    flex-shrink: 0; /* Prevent header from shrinking */
}

/* Main content adjustments - make it scrollable */
/* OVERRIDE library.css grid layout - we need flex column for core page */
body > main {
    max-width: 1400px !important;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
    box-sizing: border-box;
    overflow-y: auto;
    overflow-x: hidden;
    flex: 1;
    min-height: 0; /* Allow flex child to shrink below content size */
    display: flex !important; /* Override grid from library.css */
    flex-direction: column !important; /* Force vertical stacking */
    grid-template-columns: none !important; /* Remove grid columns */
    gap: 0 !important; /* Remove grid gap */
}

/* Custom scrollbar styling for main content */
body > main::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

body > main::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 4px;
}

body > main::-webkit-scrollbar-thumb {
    background: color-mix(in oklab, var(--muted) 40%, transparent);
    border-radius: 4px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

body > main::-webkit-scrollbar-thumb:hover {
    background: color-mix(in oklab, var(--muted) 60%, transparent);
    background-clip: padding-box;
}

body > main::-webkit-scrollbar-thumb:active {
    background: color-mix(in oklab, var(--accent) 50%, transparent);
    background-clip: padding-box;
}

/* Firefox scrollbar styling */
body > main {
    scrollbar-width: thin;
    scrollbar-color: color-mix(in oklab, var(--muted) 40%, transparent) transparent;
}

body > main:hover {
    scrollbar-color: color-mix(in oklab, var(--muted) 60%, transparent) transparent;
}

/* Footer stays at bottom */
body > footer {
    flex-shrink: 0; /* Prevent footer from shrinking */
}

/* Domain sections - FORCE each to take full width in its own row */
.domain-section {
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 0 2rem 0 !important;
    border-bottom: 2px solid var(--border);
    display: block !important;
    clear: both;
    float: none;
    flex: 0 0 auto; /* Don't flex, just take natural height */
}

.domain-section.collapsed {
    border-bottom: none;
}

@media (max-width: 960px) {
    body > main {
        padding: 1rem;
    }
    
    .pattern-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

[hidden] { display: none !important; }