/* Shared calculator widget styles. Used by every per-tool spoke page
 * under /tools/{slug}/, and by the legacy /tools-for-engineers/ hub.
 *
 * Pulled out of /tools-for-engineers.html into its own file in week-1 of
 * the §15 sprint so the spoke pages don't have to duplicate ~150 lines
 * of inline <style>. */

:root {
    --tools-accent: #0d9488;
    --tools-accent-2: #14b8a6;
    --tools-card-bg: #fff;
    --tools-border: #e2e8f0;
    --tools-text: #1e293b;
    --tools-muted: #64748b;
    --tools-shadow: rgba(15, 23, 42, 0.08);
}

.tool-card {
    background: var(--tools-card-bg);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 1px 3px var(--tools-shadow);
    border: 1px solid var(--tools-border);
}
.tool-card h2 { color: var(--tools-accent); font-size: 1.4rem; margin-bottom: 0.75rem; }
.tool-card h3 { color: var(--tools-accent); font-size: 1rem; margin: 1rem 0 0.5rem; }
.tool-card > p { font-size: 0.95rem; color: var(--tools-muted); margin-bottom: 1rem; line-height: 1.5; }

.form-group { margin-bottom: 0.75rem; }
.form-group label { display: block; margin-bottom: 0.25rem; font-weight: 500; font-size: 0.85rem; color: var(--tools-text); }
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--tools-border);
    border-radius: 4px;
    font-size: 0.9rem;
    transition: border-color 0.2s ease;
    box-sizing: border-box;
    font-family: inherit;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--tools-accent);
}

.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 0.75rem; }

.calculate-btn {
    background: linear-gradient(135deg, var(--tools-accent), var(--tools-accent-2));
    color: white;
    border: none;
    padding: 0.7rem 1.5rem;
    border-radius: 4px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    margin-top: 0.5rem;
}
.calculate-btn:hover { transform: translateY(-1px); box-shadow: 0 2px 8px rgba(13, 148, 136, 0.3); }

.result-box {
    margin-top: 1rem;
    padding: 1rem;
    background-color: #f0fdfa;
    border-radius: 6px;
    border-left: 3px solid var(--tools-accent);
    display: none;
    font-size: 0.95rem;
}
.result-box.show { display: block; }
.result-item { margin: 0.4rem 0; }
.result-item strong { color: var(--tools-accent); }

.info-text { font-size: 0.8rem; color: var(--tools-muted); margin-top: 0.25rem; }

.warning-box {
    background-color: #fef3c7;
    border-left: 3px solid #f59e0b;
    padding: 0.75rem 1rem;
    margin: 1rem 0;
    border-radius: 4px;
    font-size: 0.85rem;
    line-height: 1.5;
}

.tabs { display: flex; gap: 0.5rem; margin-bottom: 1rem; border-bottom: 1px solid var(--tools-border); }
.tab {
    padding: 0.5rem 1rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--tools-muted);
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}
.tab.active { color: var(--tools-accent); border-bottom-color: var(--tools-accent); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Spoke-page wrapper — keeps the calculator centred and readable. */
.tool-spoke {
    max-width: 720px;
    margin: 0 auto;
    padding: var(--space-8) var(--space-4);
}
.tool-spoke .eyebrow { margin-bottom: var(--space-2); }
.tool-spoke h1 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    line-height: 1.25;
    margin: 0 0 var(--space-3);
    color: var(--text-primary);
}
.tool-spoke .lede {
    font-size: var(--text-base);
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
    line-height: 1.55;
}
.tool-spoke__about {
    margin-top: var(--space-8);
    padding: var(--space-5);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-500);
    font-size: var(--text-sm);
    line-height: 1.55;
}
.tool-spoke__about h2 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}
.tool-spoke__about a {
    color: var(--primary-600);
    font-weight: var(--weight-semibold);
}
.tool-spoke__breadcrumb {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin-bottom: var(--space-4);
}
.tool-spoke__breadcrumb a {
    color: var(--text-secondary);
}