/* ========== Guides Landing ========== */

.guides-page { padding: 20px 16px 24px; max-width: 600px; margin: 0 auto; }
.guides-page h1 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.035em;
    color: var(--text-heading);
    margin-bottom: 20px;
}

.guide-sections { display: flex; flex-direction: column; gap: 12px; }

.guide-section-card {
    padding: 18px;
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: var(--r-lg);
    box-shadow: 0 1px 2px var(--shadow-sm);
}
.guide-section-card h2 {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.005em;
    color: var(--text-heading);
    margin-bottom: 12px;
    text-transform: uppercase;
    font-family: var(--font-body);
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    font-size: 0.72rem;
}
.guide-section-card.coming-soon { opacity: 0.55; }
.guide-section-card.coming-soon h2::after {
    content: " · coming soon"; font-weight: 400;
    color: var(--text-secondary);
}

.guide-tools { display: flex; flex-direction: column; gap: 6px; }
.guide-tool-link {
    display: flex; align-items: center; gap: 12px;
    padding: 14px 14px;
    background: var(--bg-surface-alt);
    border: 1px solid transparent;
    border-radius: var(--r-md);
    text-decoration: none;
    color: var(--text-heading);
    font-family: var(--font-display);
    font-weight: 600; letter-spacing: -0.015em;
    font-size: 1rem;
    transition: background 0.15s ease, border-color 0.15s ease, transform 0.12s ease;
}
.guide-tool-link:hover {
    background: var(--bg-surface);
    border-color: var(--border);
    transform: translateX(2px);
}
.guide-tool-link svg { width: 22px; height: 22px; color: var(--accent); flex-shrink: 0; }

/* ========== Volume Calculator ========== */

.volume-calc { padding: 16px; max-width: 600px; margin: 0 auto; }
.volume-calc .page-header { margin-bottom: 16px; }
.volume-calc .page-header h1 { font-size: 1.4rem; font-weight: 700; color: var(--text-heading); margin-top: 4px; }

.volume-input { margin-bottom: 20px; }

.input-row { display: flex; gap: 12px; margin-bottom: 12px; }
.input-row .form-group { flex: 1; margin-bottom: 0; }

.volume-results { margin-top: 24px; }

.summary-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px;
    margin-bottom: 20px;
}
.summary-item {
    padding: 12px; background: var(--bg-surface); border-radius: 10px;
    box-shadow: 0 1px 4px var(--shadow-sm); text-align: center;
}
.summary-item .label { display: block; font-size: 0.75rem; color: var(--text-secondary); font-weight: 600; text-transform: uppercase; margin-bottom: 2px; }
.summary-item .value { display: block; font-size: 1.2rem; font-weight: 700; color: var(--text-heading); }
.summary-item .unit { font-size: 0.8rem; color: var(--text-secondary); font-weight: 400; }

.piece-list { margin-bottom: 24px; }
.piece-list h2 { font-size: 1.1rem; font-weight: 600; color: var(--text-heading); margin-bottom: 10px; }

.piece-card {
    padding: 14px; background: var(--bg-surface); border-radius: 10px;
    box-shadow: 0 1px 4px var(--shadow-sm); margin-bottom: 10px;
}
.piece-card h3 { font-size: 0.95rem; font-weight: 600; color: var(--text-heading); margin-bottom: 8px; }
.piece-card .piece-details { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.piece-detail-chip {
    padding: 3px 8px; background: var(--bg-surface-alt); border-radius: 4px;
    font-size: 0.8rem; color: var(--text-secondary);
}
.piece-detail-chip strong { color: var(--text); }

.piece-svg-container {
    background: var(--bg-surface-alt); border-radius: 8px; padding: 12px;
    display: flex; justify-content: center; overflow: hidden;
}
.piece-svg-container svg { max-width: 100%; height: auto; }

.isometric-section { margin-bottom: 24px; }
.isometric-section h2 { font-size: 1.1rem; font-weight: 600; color: var(--text-heading); margin-bottom: 10px; }

.isometric-container {
    background: var(--bg-surface); border-radius: 12px; padding: 16px;
    box-shadow: 0 2px 8px var(--shadow-md); display: flex; justify-content: center;
}
.isometric-container svg { max-width: 100%; height: auto; }