/*
Theme Name: Engine Code A20DTH
Theme URI: https://a20dth.com
Description: A no-nonsense WordPress theme for the Opel/Vauxhall A20DTH 2.0 CDTI diesel engine. Built for real mechanics, not AI slop.
Version: 1.0
Author: Engine Code
License: GPL v2 or later
Text Domain: engine-code
*/

/* ===== RESET & BASE ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg: #0f1114;
    --bg-card: #1a1d23;
    --bg-card-hover: #22262e;
    --border: #2a2e37;
    --border-accent: #3d4350;
    --text: #e2e4e9;
    --text-muted: #8b919e;
    --text-dim: #5c6170;
    --accent: #e8a430;
    --accent-hover: #f0b84d;
    --accent-dim: rgba(232, 164, 48, 0.12);
    --danger: #d94444;
    --success: #3daa5c;
    --warning: #e8a430;
    --font-body: 'IBM Plex Sans', -apple-system, sans-serif;
    --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
    --font-heading: 'Barlow Condensed', 'Arial Narrow', sans-serif;
    --max-width: 860px;
    --radius: 6px;
}

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

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-hover);
}

img {
    max-width: 100%;
    height: auto;
}

/* ===== LAYOUT ===== */
.site-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== HEADER ===== */
.site-header {
    border-bottom: 1px solid var(--border);
    padding: 20px 0;
    position: sticky;
    top: 0;
    background: rgba(15, 17, 20, 0.95);
    backdrop-filter: blur(12px);
    z-index: 100;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.5px;
}

.site-logo .engine-code {
    color: var(--accent);
}

.site-tagline {
    font-size: 0.75rem;
    color: var(--text-dim);
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ===== HERO (Homepage) ===== */
.hero {
    padding: 80px 0 60px;
    border-bottom: 1px solid var(--border);
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: 2.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    line-height: 1.1;
    margin-bottom: 16px;
}

.hero h1 .highlight {
    color: var(--accent);
}

.hero .subtitle {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 600px;
    line-height: 1.7;
    margin-bottom: 32px;
}

.hero .ai-callout {
    background: var(--accent-dim);
    border: 1px solid rgba(232, 164, 48, 0.25);
    border-radius: var(--radius);
    padding: 16px 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
    max-width: 600px;
    line-height: 1.6;
}

.hero .ai-callout strong {
    color: var(--accent);
}

/* ===== SEARCH BAR (future AI search) ===== */
.search-section {
    padding: 40px 0;
    border-bottom: 1px solid var(--border);
}

.search-box {
    position: relative;
    max-width: 600px;
}

.search-box input {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px 16px 48px;
    color: var(--text);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color 0.2s;
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent);
}

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

.search-box .search-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-dim);
    font-size: 1.1rem;
}

.search-box .search-hint {
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-top: 8px;
    font-family: var(--font-mono);
}

/* ===== ISSUES LIST (Homepage) ===== */
.issues-section {
    padding: 48px 0;
}

.section-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-dim);
    margin-bottom: 24px;
}

.issues-grid {
    display: grid;
    gap: 12px;
}

.issue-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 24px;
    transition: all 0.2s;
    text-decoration: none;
    color: var(--text);
}

.issue-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-accent);
    color: var(--text);
}

.issue-card .severity {
    flex-shrink: 0;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-top: 8px;
}

.issue-card .severity.critical { background: var(--danger); }
.issue-card .severity.moderate { background: var(--warning); }
.issue-card .severity.minor { background: var(--success); }

.issue-card .issue-content {
    flex: 1;
}

.issue-card .issue-title {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.issue-card .issue-summary {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.issue-card .issue-meta {
    display: flex;
    gap: 16px;
    margin-top: 10px;
    font-size: 0.72rem;
    font-family: var(--font-mono);
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== SINGLE ISSUE PAGE ===== */
.issue-page {
    padding: 48px 0 80px;
}

.issue-header {
    margin-bottom: 40px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border);
}

.issue-header .breadcrumb {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.issue-header .breadcrumb a {
    color: var(--text-dim);
}

.issue-header .breadcrumb a:hover {
    color: var(--accent);
}

.issue-header h1 {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    line-height: 1.15;
    margin-bottom: 12px;
}

.issue-header .issue-badges {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.badge {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 4px 10px;
    border-radius: 3px;
    border: 1px solid;
}

.badge.severity-critical {
    color: var(--danger);
    border-color: rgba(217, 68, 68, 0.3);
    background: rgba(217, 68, 68, 0.08);
}

.badge.severity-moderate {
    color: var(--warning);
    border-color: rgba(232, 164, 48, 0.3);
    background: rgba(232, 164, 48, 0.08);
}

.badge.diy {
    color: var(--success);
    border-color: rgba(61, 170, 92, 0.3);
    background: rgba(61, 170, 92, 0.08);
}

.badge.mechanic {
    color: var(--danger);
    border-color: rgba(217, 68, 68, 0.3);
    background: rgba(217, 68, 68, 0.08);
}

/* ===== CONTENT BLOCKS ===== */
.content-block {
    margin-bottom: 40px;
}

.content-block .block-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent);
    margin-bottom: 12px;
}

.content-block .block-content {
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--text-muted);
}

.content-block .block-content p {
    margin-bottom: 12px;
}

.content-block .block-content p:last-child {
    margin-bottom: 0;
}

/* Real knowledge callout */
.real-talk {
    background: var(--accent-dim);
    border-left: 3px solid var(--accent);
    padding: 16px 20px;
    margin: 20px 0;
    border-radius: 0 var(--radius) var(--radius) 0;
}

.real-talk .real-talk-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--accent);
    margin-bottom: 6px;
}

.real-talk p {
    font-size: 0.9rem;
    color: var(--text);
    line-height: 1.65;
}

/* ===== DIAGNOSIS STEPS ===== */
.diagnosis-steps {
    counter-reset: step;
}

.diagnosis-step {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.diagnosis-step::before {
    counter-increment: step;
    content: counter(step);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent);
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(232, 164, 48, 0.3);
    border-radius: 50%;
    margin-top: 2px;
}

.diagnosis-step p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ===== PARTS LIST ===== */
.parts-list {
    display: grid;
    gap: 12px;
}

.part-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    transition: border-color 0.2s;
}

.part-card:hover {
    border-color: var(--border-accent);
}

.part-info .part-name {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}

.part-info .part-detail {
    font-size: 0.78rem;
    color: var(--text-dim);
    font-family: var(--font-mono);
}

.part-link {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent);
    padding: 8px 16px;
    border: 1px solid rgba(232, 164, 48, 0.3);
    border-radius: var(--radius);
    transition: all 0.2s;
    white-space: nowrap;
}

.part-link:hover {
    background: var(--accent-dim);
    color: var(--accent-hover);
}

/* ===== FOOTER ===== */
.site-footer {
    margin-top: auto;
    border-top: 1px solid var(--border);
    padding: 32px 0;
}

.site-footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-text {
    font-size: 0.75rem;
    color: var(--text-dim);
    font-family: var(--font-mono);
}

.footer-text a {
    color: var(--text-dim);
}

.footer-text a:hover {
    color: var(--accent);
}

.affiliate-disclosure {
    font-size: 0.68rem;
    color: var(--text-dim);
    font-family: var(--font-mono);
}

/* ===== LIGHT THEME ===== */
[data-theme="light"] {
    --bg: #f4f5f7;
    --bg-card: #ffffff;
    --bg-card-hover: #f0f1f3;
    --border: #d8dbe1;
    --border-accent: #b8bcc6;
    --text: #1a1d23;
    --text-muted: #4a5060;
    --text-dim: #8b919e;
    --accent: #c4860a;
    --accent-hover: #a87208;
    --accent-dim: rgba(196, 134, 10, 0.1);
    --danger: #c33;
    --success: #2d8a47;
    --warning: #c4860a;
}

[data-theme="light"] .site-header {
    background: rgba(244, 245, 247, 0.95);
}

[data-theme="light"] .search-box input {
    background: var(--bg-card);
}

/* Theme toggle button */
.theme-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 6px 10px;
    cursor: pointer;
    color: var(--text);
    font-size: 1.1rem;
    line-height: 1;
    transition: all 0.2s;
    display: flex;
    align-items: center;
}

.theme-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Theme transition — only added after first paint to prevent flash */
body.theme-ready,
body.theme-ready .site-header,
body.theme-ready .issue-card,
body.theme-ready .diagnosis-step,
body.theme-ready .part-card,
body.theme-ready .search-box input,
body.theme-ready .real-talk {
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
    .hero h1 {
        font-size: 2rem;
    }

    .issue-header h1 {
        font-size: 1.6rem;
    }

    .site-header .container {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

    .part-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .site-footer .container {
        flex-direction: column;
        gap: 8px;
    }

    .issue-card .issue-meta {
        flex-wrap: wrap;
    }
}