/* ==========================================================================
   Custom Automotive Store - Main Stylesheet
   Design system, resets, layout primitives, buttons, and shared components.
   ========================================================================== */

/* ---------------------------------------------------------------------------
   1. Design Tokens (CSS Variables)
   --------------------------------------------------------------------------- */
:root {
    /* Colors */
    --cas-bg: #ffffff;
    --cas-bg-secondary: #f5f6f7;
    --cas-text: #17212b;
    --cas-text-secondary: #667085;
    --cas-accent: #c92a2a;
    --cas-accent-hover: #a81f1f;
    --cas-border: #e5e7eb;
    --cas-success: #16834a;
    --cas-error: #c62828;

    /* Typography */
    --cas-font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --cas-fs-base: 16px;
    --cas-lh-base: 1.6;

    /* Spacing scale */
    --cas-space-xs: 4px;
    --cas-space-sm: 8px;
    --cas-space-md: 16px;
    --cas-space-lg: 24px;
    --cas-space-xl: 40px;
    --cas-space-2xl: 64px;

    /* Radius */
    --cas-radius-sm: 6px;
    --cas-radius-md: 8px;
    --cas-radius-lg: 12px;

    /* Shadows */
    --cas-shadow-sm: 0 1px 2px rgba(23, 33, 43, 0.06);
    --cas-shadow-md: 0 2px 8px rgba(23, 33, 43, 0.08);
    --cas-shadow-lg: 0 8px 24px rgba(23, 33, 43, 0.12);

    /* Layout */
    --cas-container: 1240px;
    --cas-header-height: 72px;

    /* Transitions */
    --cas-transition: 0.2s ease;
}

/* ---------------------------------------------------------------------------
   2. Reset & Base
   --------------------------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--cas-font-base);
    font-size: var(--cas-fs-base);
    line-height: var(--cas-lh-base);
    color: var(--cas-text);
    background-color: var(--cas-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--cas-text);
    text-decoration: none;
    transition: color var(--cas-transition);
}

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

h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--cas-space-md);
    line-height: 1.25;
    font-weight: 700;
    color: var(--cas-text);
}

h1 { font-size: clamp(1.8rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

p {
    margin: 0 0 var(--cas-space-md);
}

ul, ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
}

:focus-visible {
    outline: 2px solid var(--cas-accent);
    outline-offset: 2px;
}

/* Screen reader only */
.screen-reader-text,
.cas-sr-only {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    width: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute !important;
    word-wrap: normal !important;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--cas-text);
    color: #fff;
    padding: var(--cas-space-sm) var(--cas-space-md);
    z-index: 10000;
    border-radius: 0 0 var(--cas-radius-sm) 0;
}

.skip-link:focus {
    left: 0;
    color: #fff;
}

/* ---------------------------------------------------------------------------
   3. Layout Primitives
   --------------------------------------------------------------------------- */
.cas-container {
    width: 100%;
    max-width: var(--cas-container);
    margin: 0 auto;
    padding: 0 var(--cas-space-md);
}

.cas-section {
    padding: var(--cas-space-2xl) 0;
}

.cas-section--tight {
    padding: var(--cas-space-xl) 0;
}

.cas-section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--cas-space-xl);
}

.cas-section-header h2 {
    margin-bottom: var(--cas-space-sm);
}

.cas-section-header p {
    color: var(--cas-text-secondary);
    margin: 0;
}

/* ---------------------------------------------------------------------------
   4. Buttons
   --------------------------------------------------------------------------- */
.cas-btn,
.cas-btn:visited {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--cas-space-sm);
    padding: 12px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1;
    border-radius: var(--cas-radius-md);
    border: 1px solid transparent;
    transition: background-color var(--cas-transition), color var(--cas-transition), border-color var(--cas-transition);
    text-align: center;
}

.cas-btn--primary {
    background-color: var(--cas-accent);
    color: #fff;
}

.cas-btn--primary:hover {
    background-color: var(--cas-accent-hover);
    color: #fff;
}

.cas-btn--secondary {
    background-color: transparent;
    color: var(--cas-text);
    border-color: var(--cas-border);
}

.cas-btn--secondary:hover {
    border-color: var(--cas-text);
    color: var(--cas-text);
}

.cas-btn--block {
    width: 100%;
}

.cas-btn--lg {
    padding: 15px 32px;
    font-size: 1rem;
}

/* ---------------------------------------------------------------------------
   5. Utility
   --------------------------------------------------------------------------- */
.cas-bg-secondary {
    background-color: var(--cas-bg-secondary);
}

.cas-text-accent {
    color: var(--cas-accent);
}

.cas-grid {
    display: grid;
    gap: var(--cas-space-lg);
}

.cas-badge {
    display: inline-block;
    padding: 3px 10px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-radius: 999px;
    background: var(--cas-accent);
    color: #fff;
}

.cas-badge--sale {
    background: var(--cas-accent);
}

/* ---------------------------------------------------------------------------
   6. Breadcrumbs
   --------------------------------------------------------------------------- */
.cas-breadcrumbs,
.woocommerce-breadcrumb {
    font-size: 0.85rem;
    color: var(--cas-text-secondary);
    padding: var(--cas-space-md) 0;
}

.woocommerce-breadcrumb a {
    color: var(--cas-text-secondary);
}

.woocommerce-breadcrumb a:hover {
    color: var(--cas-accent);
}

/* ---------------------------------------------------------------------------
   7. Pages, posts, 404, search listings
   --------------------------------------------------------------------------- */
.cas-page__article,
.cas-single__article {
    max-width: 820px;
    margin: 0 auto;
}

.cas-page__content img,
.cas-single__content img {
    border-radius: var(--cas-radius-md);
}

.cas-single__featured {
    margin-bottom: var(--cas-space-lg);
}

.cas-single__meta {
    color: var(--cas-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--cas-space-md);
}

.cas-post-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--cas-space-lg);
}

.cas-post-card {
    border: 1px solid var(--cas-border);
    border-radius: var(--cas-radius-lg);
    overflow: hidden;
    background: var(--cas-bg);
}

.cas-post-card__media {
    display: block;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--cas-bg-secondary);
}

.cas-post-card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cas-post-card__body {
    padding: var(--cas-space-md);
}

.cas-post-card__title {
    font-size: 1.1rem;
    margin-bottom: var(--cas-space-sm);
}

.cas-post-card__excerpt {
    color: var(--cas-text-secondary);
    font-size: 0.92rem;
}

/* 404 */
.cas-404__inner {
    text-align: center;
    max-width: 560px;
    margin: 0 auto;
    padding: var(--cas-space-xl) 0;
}

.cas-404__code {
    font-size: clamp(4rem, 12vw, 7rem);
    line-height: 1;
    color: var(--cas-accent);
    margin-bottom: 0;
}

.cas-404__text {
    color: var(--cas-text-secondary);
    margin-bottom: var(--cas-space-lg);
}

.cas-404__search {
    max-width: 420px;
    margin: 0 auto var(--cas-space-lg);
}

.cas-404__actions {
    display: flex;
    gap: var(--cas-space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Generic search form */
.cas-search-form {
    display: flex;
    gap: var(--cas-space-sm);
}

.cas-search-form__input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--cas-border);
    border-radius: var(--cas-radius-md);
    font-size: 1rem;
}

.cas-search-form__submit {
    padding: 12px 22px;
    background: var(--cas-accent);
    color: #fff;
    border: none;
    border-radius: var(--cas-radius-md);
    font-weight: 600;
}

.cas-no-results {
    text-align: center;
    padding: var(--cas-space-xl) 0;
}

/* Widget (shop sidebar) */
.cas-widget {
    margin-bottom: var(--cas-space-lg);
}

.cas-widget-title {
    font-size: 0.95rem;
    margin-bottom: var(--cas-space-sm);
}

@media (max-width: 1023px) {
    .cas-post-list { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
    .cas-post-list { grid-template-columns: 1fr; }
    .cas-404__actions { flex-direction: column; }
}