/* ============================================
   BuildCalcWorld — SketchUp 3D Models Page
   Self-contained styles (no external deps)
   ============================================ */

/* === Variables === */
:root {
    --skp-bg: #0c0e12;
    --skp-bg-card: #14171d;
    --skp-bg-card-hover: #1a1f28;
    --skp-bg-toolbar: #111318;
    --skp-border: #1e2330;
    --skp-border-hover: #2d3548;
    --skp-text: #e8ecf4;
    --skp-text-sec: #8b92a5;
    --skp-text-muted: #5a6177;
    --skp-accent: #f97316;
    --skp-accent-hover: #fb923c;
    --skp-accent-glow: rgba(249, 115, 22, 0.25);
    --skp-success: #059669;
    --skp-radius: 12px;
    --skp-radius-lg: 16px;
    --skp-radius-sm: 8px;
    --skp-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --skp-font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* === Hero === */
.skp-hero {
    text-align: center;
    padding: 80px 24px 48px;
    background: linear-gradient(180deg, #141820 0%, var(--skp-bg) 100%);
    position: relative;
    overflow: hidden;
}

.skp-hero::before {
    content: '';
    position: absolute;
    top: -80px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--skp-accent-glow) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.skp-hero>* {
    position: relative;
    z-index: 1;
}

.skp-hero-badge {
    display: inline-block;
    background: var(--skp-accent);
    color: #fff;
    font-family: var(--skp-font);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    padding: 5px 16px;
    border-radius: 999px;
    margin-bottom: 20px;
}

.skp-hero-title {
    font-family: var(--skp-font);
    font-size: 42px;
    font-weight: 800;
    color: var(--skp-text);
    margin: 0 0 16px;
    line-height: 1.15;
}

.skp-hero-sub {
    font-family: var(--skp-font);
    font-size: 17px;
    color: var(--skp-text-sec);
    max-width: 580px;
    margin: 0 auto 28px;
    line-height: 1.7;
}

.skp-hero-counter {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--skp-bg-card);
    border: 1px solid var(--skp-border);
    border-radius: 999px;
    padding: 8px 24px;
}

.skp-counter-num {
    font-family: var(--skp-font);
    font-size: 28px;
    font-weight: 800;
    color: var(--skp-accent);
}

.skp-counter-label {
    font-family: var(--skp-font);
    font-size: 13px;
    color: var(--skp-text-sec);
    font-weight: 500;
}

/* === Container === */
.skp-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* === Toolbar (Search + Categories) === */
.skp-toolbar {
    padding: 24px 0;
    background: var(--skp-bg-toolbar);
    border-bottom: 1px solid var(--skp-border);
    position: sticky;
    top: 64px;
    z-index: 50;
    backdrop-filter: blur(12px);
}

.skp-search-wrap {
    position: relative;
    margin-bottom: 16px;
}

.skp-search-icon {
    position: absolute;
    top: 50%;
    left: 14px;
    transform: translateY(-50%);
    color: var(--skp-text-muted);
    pointer-events: none;
}

.skp-search {
    width: 100%;
    padding: 12px 16px 12px 44px;
    background: var(--skp-bg-card);
    border: 1px solid var(--skp-border);
    border-radius: var(--skp-radius);
    color: var(--skp-text);
    font-family: var(--skp-font);
    font-size: 15px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.skp-search:focus {
    border-color: var(--skp-accent);
    box-shadow: 0 0 0 3px var(--skp-accent-glow);
}

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

.skp-categories {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.skp-cat-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    background: var(--skp-bg-card);
    border: 1px solid var(--skp-border);
    border-radius: 999px;
    color: var(--skp-text-sec);
    font-family: var(--skp-font);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.skp-cat-btn:hover {
    border-color: var(--skp-border-hover);
    color: var(--skp-text);
    background: var(--skp-bg-card-hover);
}

.skp-cat-btn.active {
    background: var(--skp-accent);
    border-color: var(--skp-accent);
    color: #fff;
}

.skp-cat-icon {
    font-size: 15px;
}

/* === Section === */
.skp-section {
    padding: 48px 0;
}

/* === Models Grid === */
.skp-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

/* === Model Card === */
.skp-card {
    background: var(--skp-bg-card);
    border: 1px solid var(--skp-border);
    border-radius: var(--skp-radius-lg);
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    display: flex;
    flex-direction: column;
}

.skp-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--skp-shadow);
    border-color: var(--skp-border-hover);
}

.skp-card-preview {
    position: relative;
    height: 200px;
    background: linear-gradient(135deg, #1a1f2e 0%, #0f1218 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.skp-card-preview-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    padding: 0;
    background: #e8ecf0;
}

.skp-card-preview::after {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(45deg,
            transparent,
            transparent 20px,
            rgba(255, 255, 255, 0.01) 20px,
            rgba(255, 255, 255, 0.01) 40px);
    pointer-events: none;
}

.skp-card-3d-icon {
    font-size: 64px;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.4));
    transition: transform 0.3s;
}

.skp-card:hover .skp-card-3d-icon {
    transform: scale(1.1) rotate(-3deg);
}

.skp-card-format {
    position: absolute;
    top: 12px;
    left: 12px;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    color: var(--skp-text-sec);
    font-family: var(--skp-font);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.8px;
    padding: 4px 10px;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    z-index: 2;
}

.skp-card-free {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--skp-success);
    color: #fff;
    font-family: var(--skp-font);
    font-size: 11px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 999px;
    z-index: 2;
}

.skp-card-dynamic {
    position: absolute;
    bottom: 12px;
    left: 12px;
    background: rgba(249, 115, 22, 0.9);
    color: #fff;
    font-size: 12px;
    padding: 3px 8px;
    border-radius: 6px;
    z-index: 2;
}

/* Card Body */
.skp-card-body {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.skp-card-title {
    font-family: var(--skp-font);
    font-size: 17px;
    font-weight: 700;
    color: var(--skp-text);
    margin: 0 0 8px;
}

.skp-card-desc {
    font-family: var(--skp-font);
    font-size: 13px;
    color: var(--skp-text-sec);
    line-height: 1.7;
    margin: 0 0 16px;
    flex: 1;
}

.skp-card-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.skp-card-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--skp-font);
    font-size: 12px;
    color: var(--skp-text-muted);
}

.skp-card-meta-item svg {
    color: var(--skp-text-muted);
}

/* View Product Button (instead of direct download) */
.skp-view-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    padding: 12px 20px;
    background: transparent;
    color: var(--skp-accent);
    font-family: var(--skp-font);
    font-size: 14px;
    font-weight: 700;
    border: 2px solid var(--skp-accent);
    border-radius: var(--skp-radius-sm);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.25s;
    text-align: center;
}

.skp-view-btn:hover {
    background: var(--skp-accent);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--skp-accent-glow);
}

/* Download Button */
.skp-download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 12px 20px;
    background: linear-gradient(135deg, var(--skp-accent), #ea580c);
    color: #fff;
    font-family: var(--skp-font);
    font-size: 14px;
    font-weight: 700;
    border: none;
    border-radius: var(--skp-radius-sm);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.25s;
    box-shadow: 0 2px 8px var(--skp-accent-glow);
}

.skp-download-btn:hover {
    background: linear-gradient(135deg, var(--skp-accent-hover), var(--skp-accent));
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--skp-accent-glow);
}

.skp-download-btn:active {
    transform: translateY(0);
}

.skp-download-btn svg {
    stroke: #fff;
}

.skp-download-btn-lg {
    padding: 16px 32px;
    font-size: 16px;
    border-radius: var(--skp-radius);
    margin-top: 8px;
}

/* === No Results === */
.skp-no-results {
    text-align: center;
    padding: 64px 24px;
}

.skp-no-results-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.skp-no-results p {
    font-family: var(--skp-font);
    font-size: 15px;
    color: var(--skp-text-muted);
}

/* === Section Title === */
.skp-section-title {
    font-family: var(--skp-font);
    font-size: 26px;
    font-weight: 700;
    color: var(--skp-text);
    text-align: center;
    margin-bottom: 32px;
}

/* === FAQ === */
.skp-faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 800px;
    margin: 0 auto;
}

.skp-faq-item {
    background: var(--skp-bg-card);
    border: 1px solid var(--skp-border);
    border-radius: var(--skp-radius);
    padding: 20px 24px;
    transition: border-color 0.2s;
}

.skp-faq-item[open] {
    border-color: var(--skp-accent);
}

.skp-faq-summary {
    font-family: var(--skp-font);
    font-size: 15px;
    font-weight: 600;
    color: var(--skp-text);
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.skp-faq-summary::-webkit-details-marker {
    display: none;
}

.skp-faq-summary::after {
    content: '+';
    font-size: 20px;
    font-weight: 300;
    color: var(--skp-text-muted);
    transition: transform 0.2s;
}

.skp-faq-item[open] .skp-faq-summary::after {
    content: '−';
    color: var(--skp-accent);
}

.skp-faq-answer {
    font-family: var(--skp-font);
    font-size: 14px;
    color: var(--skp-text-sec);
    line-height: 1.8;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--skp-border);
}

/* === Ad Zone === */
.skp-ad-zone {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    text-align: center;
}

/* ============================================
   DETAIL PAGE STYLES
   ============================================ */

/* Back Link */
.skp-back-link {
    display: inline-block;
    font-family: var(--skp-font);
    font-size: 14px;
    color: var(--skp-accent);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

.skp-back-link:hover {
    color: var(--skp-accent-hover);
}

/* Detail Grid */
.skp-detail {
    padding: 32px 0 48px;
}

.skp-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

/* Detail Preview / Image */
.skp-detail-preview {
    position: relative;
    background: linear-gradient(135deg, #1a1f2e 0%, #0f1218 100%);
    border-radius: var(--skp-radius-lg);
    overflow: hidden;
    border: 1px solid var(--skp-border);
    min-height: 360px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.skp-detail-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    min-height: 360px;
    padding: 16px;
    background: #e8ecf0;
}

.skp-detail-fallback {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    min-height: 360px;
}

.skp-detail-fallback-icon {
    font-size: 96px;
    filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.4));
}

.skp-detail-badges {
    position: absolute;
    top: 16px;
    left: 16px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    z-index: 2;
}

.skp-badge-dynamic {
    background: var(--skp-accent);
    color: #fff;
    font-family: var(--skp-font);
    font-size: 12px;
    font-weight: 700;
    padding: 5px 14px;
    border-radius: 999px;
}

.skp-badge-free {
    background: var(--skp-success);
    color: #fff;
    font-family: var(--skp-font);
    font-size: 12px;
    font-weight: 700;
    padding: 5px 14px;
    border-radius: 999px;
}

.skp-badge-format {
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    color: var(--skp-text-sec);
    font-family: var(--skp-font);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.8px;
    padding: 5px 12px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Detail Info */
.skp-detail-info {
    display: flex;
    flex-direction: column;
}

.skp-detail-title {
    font-family: var(--skp-font);
    font-size: 32px;
    font-weight: 800;
    color: var(--skp-text);
    margin: 0 0 16px;
    line-height: 1.2;
}

.skp-detail-desc {
    font-family: var(--skp-font);
    font-size: 15px;
    color: var(--skp-text-sec);
    line-height: 1.8;
    margin: 0 0 24px;
}

.skp-detail-meta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 24px;
}

.skp-detail-meta-card {
    background: var(--skp-bg-card);
    border: 1px solid var(--skp-border);
    border-radius: var(--skp-radius-sm);
    padding: 14px 16px;
}

.skp-detail-meta-label {
    display: block;
    font-family: var(--skp-font);
    font-size: 11px;
    font-weight: 600;
    color: var(--skp-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    margin-bottom: 4px;
}

.skp-detail-meta-value {
    font-family: var(--skp-font);
    font-size: 14px;
    font-weight: 600;
    color: var(--skp-text);
}

/* Features Grid */
.skp-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
    max-width: 900px;
    margin: 0 auto;
}

.skp-feature-card {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background: var(--skp-bg-card);
    border: 1px solid var(--skp-border);
    border-radius: var(--skp-radius);
    padding: 20px;
    transition: border-color 0.2s;
}

.skp-feature-card:hover {
    border-color: var(--skp-border-hover);
}

.skp-feature-num {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    background: var(--skp-accent);
    color: #fff;
    font-family: var(--skp-font);
    font-size: 14px;
    font-weight: 700;
    border-radius: 8px;
}

.skp-feature-text {
    font-family: var(--skp-font);
    font-size: 14px;
    color: var(--skp-text-sec);
    line-height: 1.6;
    margin: 0;
    padding-top: 5px;
}

/* Steps */
.skp-steps {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.skp-step {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px 24px;
    background: var(--skp-bg-card);
    border: 1px solid var(--skp-border);
    border-radius: 0;
    position: relative;
}

.skp-step:first-child {
    border-radius: var(--skp-radius) var(--skp-radius) 0 0;
}

.skp-step:last-child {
    border-radius: 0 0 var(--skp-radius) var(--skp-radius);
}

.skp-step+.skp-step {
    border-top: none;
}

.skp-step-num {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--skp-accent), #ea580c);
    color: #fff;
    font-family: var(--skp-font);
    font-size: 15px;
    font-weight: 700;
    border-radius: 50%;
}

.skp-step-text {
    font-family: var(--skp-font);
    font-size: 14px;
    color: var(--skp-text);
    line-height: 1.6;
    margin: 0;
}

/* === Responsive === */
@media (max-width: 768px) {
    .skp-hero {
        padding: 56px 16px 36px;
    }

    .skp-hero-title {
        font-size: 28px;
    }

    .skp-hero-sub {
        font-size: 15px;
    }

    .skp-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .skp-toolbar {
        top: 56px;
    }

    .skp-categories {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 4px;
        -webkit-overflow-scrolling: touch;
    }

    .skp-cat-btn {
        white-space: nowrap;
        flex-shrink: 0;
    }

    .skp-card-preview {
        height: 160px;
    }

    .skp-section-title {
        font-size: 22px;
    }

    /* Detail page responsive */
    .skp-detail-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .skp-detail-title {
        font-size: 24px;
    }

    .skp-detail-meta-grid {
        grid-template-columns: 1fr;
    }

    .skp-detail-preview {
        min-height: 240px;
    }

    .skp-detail-img {
        min-height: 240px;
    }

    .skp-detail-fallback {
        min-height: 240px;
    }

    .skp-features-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .skp-hero-title {
        font-size: 24px;
    }

    .skp-counter-num {
        font-size: 22px;
    }

    .skp-card-body {
        padding: 16px;
    }

    .skp-detail-title {
        font-size: 22px;
    }
}