/* ==========================================================================
   1. RESET & VARIABLES
   ========================================================================== */
:root {
    --bg-main: #ffffff;
    --text-color: #111111;
    --border-color: #111111;
    --border-width: 2px;
    --radius: 4px;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-color);
    font-family: var(--font-stack);
    line-height: 1.5;
}

/* ==========================================================================
   2. CUSTOM NATIVE 12-COLUMN GRID SYSTEM
   ========================================================================== */
.grid-12 {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}

/* Desktop Column Span Definitions */
.col-12 { grid-column: span 12; }
.col-11 { grid-column: span 11; }
.col-10 { grid-column: span 10; }
.col-9  { grid-column: span 9; }
.col-8  { grid-column: span 8; }
.col-7  { grid-column: span 7; }
.col-6  { grid-column: span 6; }
.col-5  { grid-column: span 5; }
.col-4  { grid-column: span 4; }
.col-3  { grid-column: span 3; }
.col-2  { grid-column: span 2; }
.col-1  { grid-column: span 1; }

/* ==========================================================================
   3. WIREFRAME COMPONENTS & UTILITIES
   ========================================================================== */
.wf-box {
    background: var(--bg-main);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
}

.wf-btn {
    border: var(--border-width) solid var(--border-color);
    background: transparent;
    color: var(--text-color);
    padding: 6px 14px;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: bold;
    cursor: pointer;
    display: inline-block;
}

.wf-btn-dark {
    border: var(--border-width) solid var(--border-color);
    background: var(--text-color);
    color: var(--bg-main);
    padding: 10px 20px;
    border-radius: var(--radius);
    font-weight: bold;
    cursor: pointer;
}

/* ==========================================================================
   4. LAYOUT SECTIONS
   ========================================================================== */
.site-header {
    border-bottom: var(--border-width) solid var(--border-color);
    padding: 15px 20px;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.logo h1 {
    font-size: 1.75rem;
    letter-spacing: 1px;
}

.top-nav {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.top-nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
}

.sub-nav {
    display: flex;
    gap: 20px;
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px dashed #ccc;
}

.sub-nav a {
    color: #444;
    text-decoration: none;
    font-weight: 500;
}

.main-content {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 15px;
}

/* Search Section Styling */
.search-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.vehicle-tabs {
    display: flex;
    gap: 10px;
}

.tab-btn {
    background: var(--bg-main);
    border: var(--border-width) solid var(--border-color);
    padding: 8px 20px;
    font-weight: bold;
    cursor: pointer;
    border-radius: var(--radius);
}

.tab-btn.active {
    background: var(--text-color);
    color: var(--bg-main);
}

.search-bar {
    display: flex;
    width: 100%;
    max-width: 600px;
    gap: 10px;
}

.search-bar input {
    flex: 1;
    padding: 10px;
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
}

.feature-card {
    min-height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Footer Styling */
.site-footer {
    border-top: var(--border-width) solid var(--border-color);
    padding: 40px 20px;
    background-color: #fcfcfc;
    margin-top: 40px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-links {
    list-style: none;
    margin-top: 10px;
}

.footer-links li {
    margin-bottom: 6px;
}

.footer-links a {
    color: #333;
    text-decoration: none;
    font-size: 0.9rem;
}

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

/* ==========================================================================
   5. RESPONSIVE & GALAXY FOLD BREAKPOINTS
   ========================================================================== */

/* Folded Screen Cover Display (~340px - 480px) */
@media screen and (max-width: 480px) {
    /* Collapse all 12-column grid spans to full width */
    .col-1, .col-2, .col-3, .col-4, .col-5, .col-6, 
    .col-7, .col-8, .col-9, .col-10, .col-11, .col-12 {
        grid-column: span 12;
    }

    .search-bar {
        flex-direction: column;
    }

    .vehicle-tabs {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* Unfolded Inner Display & Tablets (~481px - 850px) */
@media screen and (min-width: 481px) and (max-width: 850px) {
    /* Convert 4-column footer items into 6-column spans (2 per row) for squarer screens */
    .site-footer .col-4 {
        grid-column: span 6;
    }
}