/* ============================================
   ellipsoid-params.css — 参考椭球参数页面专用样式
   ============================================ */

/* ---- Intro Section ---- */
.ellipsoid-intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.intro-text p {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.9;
    margin-bottom: var(--space-md);
}

.intro-text strong {
    color: var(--color-text);
}

.intro-figure {
    background: linear-gradient(135deg, #0a1628, #1a3a5c);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-align: center;
}

.intro-figure canvas {
    width: 100%;
    max-width: 460px;
    height: auto;
    display: block;
    margin: 0 auto;
}

/* ---- Filter Bar ---- */
#ellipsoidFilter {
    margin-bottom: var(--space-2xl);
}

/* ---- Ellipsoid Table ---- */
.ellipsoid-table th {
    cursor: pointer;
    user-select: none;
    position: relative;
}

.ellipsoid-table th:hover {
    background: var(--color-sky-dark);
}

.ellipsoid-table th::after {
    content: ' ⇅';
    font-size: 0.75rem;
    color: var(--color-text-muted);
    opacity: 0.5;
}

.ellipsoid-table th.sort-asc::after { content: ' ↑'; opacity: 1; color: var(--color-primary); }
.ellipsoid-table th.sort-desc::after { content: ' ↓'; opacity: 1; color: var(--color-primary); }

.ellipsoid-table td {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
}

.ellipsoid-table td:first-child {
    font-family: var(--font-body);
    font-weight: 600;
    color: var(--color-text);
}

.ellipsoid-table .tag-global { background: #E8F5E9; color: #2E7D32; }
.ellipsoid-table .tag-china { background: #E3F2FD; color: #0277BD; }
.ellipsoid-table .tag-historical { background: #FFF3E0; color: #E65100; }
.ellipsoid-table .tag-modern { background: #F3E5F5; color: #7B1FA2; }

.ellipsoid-table .category-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
    font-weight: 600;
    font-family: var(--font-body);
}

.table-note {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: var(--space-md);
    font-style: italic;
}

/* ---- Detail Cards ---- */
.ellipsoid-cards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.ellipsoid-detail-card {
    background: var(--color-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border-light);
    overflow: hidden;
    transition: var(--transition-base);
}

.ellipsoid-detail-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.edc-header {
    padding: var(--space-lg) var(--space-xl);
    background: linear-gradient(135deg, var(--color-sky), var(--color-bg));
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.edc-header h4 {
    font-family: var(--font-heading);
    font-size: 1.0625rem;
    margin: 0;
    color: var(--color-text);
}

.edc-header .edc-year {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.edc-body {
    padding: var(--space-xl);
}

.edc-param-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 0;
    border-bottom: 1px dashed var(--color-border-light);
}

.edc-param-row:last-child {
    border-bottom: none;
}

.edc-param-label {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.edc-param-value {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text);
    font-weight: 600;
}

.edc-param-value.highlight {
    color: var(--color-primary);
}

.edc-footer {
    padding: var(--space-md) var(--space-xl);
    background: var(--color-bg);
    border-top: 1px solid var(--color-border-light);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* ---- Formula Section ---- */
.formula-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.formula-card {
    background: var(--color-card);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    border: 1px solid var(--color-border-light);
}

.formula-card h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.formula-card h4::before {
    content: '∑';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--color-sky);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--color-secondary);
}

.formula-card .formula {
    background: #f8f9fa;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-text);
    line-height: 1.8;
    margin-bottom: var(--space-md);
    overflow-x: auto;
}

.formula-card p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: 0;
    line-height: 1.7;
}

/* ---- Physics Section ---- */
.physics-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.physics-card {
    background: var(--color-card);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    border: 1px solid var(--color-border-light);
    transition: var(--transition-base);
}

.physics-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.physics-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.physics-card h4 {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.physics-card p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.physics-card .formula {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-text);
    border: 1px solid var(--color-border-light);
    margin-bottom: 0;
}

/* ---- Compare Canvas ---- */
.compare-canvas-wrap {
    background: linear-gradient(135deg, #0a1628, #1a3a5c);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-align: center;
    margin-bottom: var(--space-xl);
}

.compare-canvas-wrap canvas {
    width: 100%;
    max-width: 860px;
    height: auto;
    display: block;
    margin: 0 auto;
}

.compare-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.compare-stat-item {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    border: 1px solid var(--color-border-light);
}

.compare-stat-item .cs-label {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xs);
}

.compare-stat-item .cs-value {
    font-family: var(--font-mono);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-primary);
}

/* ---- Calculator ---- */
.calculator-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    background: var(--color-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border-light);
    overflow: hidden;
}

.calc-inputs {
    padding: var(--space-2xl);
}

.input-with-select {
    display: flex;
    gap: var(--space-sm);
}

.input-with-select input {
    flex: 1;
}

.input-with-select select {
    width: 120px;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    background: var(--color-bg);
    color: var(--color-text);
}

.calc-results {
    padding: var(--space-2xl);
    background: linear-gradient(135deg, #E8F5E9, #E3F2FD);
    border-left: 4px solid var(--color-primary);
}

.result-placeholder {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    text-align: center;
    padding: var(--space-3xl) 0;
}

.calc-result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(0,0,0,0.06);
}

.calc-result-row:last-child {
    border-bottom: none;
}

.calc-result-row .calc-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.calc-result-row .calc-value {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
}

.calc-result-row .calc-value.highlight {
    color: var(--color-primary);
    font-size: 1.125rem;
}

/* ---- Scenario Section ---- */
.scenario-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.scenario-card {
    background: var(--color-card);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    border: 1px solid var(--color-border-light);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.scenario-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--color-primary-light);
}

.scenario-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
}

.scenario-num {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-sky-dark);
    line-height: 1;
    margin-bottom: var(--space-md);
}

.scenario-card h4 {
    font-family: var(--font-heading);
    font-size: 1.0625rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.scenario-card p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 0;
}

/* ---- Responsive ---- */
@media (max-width: 1023px) {
    .ellipsoid-intro-grid { grid-template-columns: 1fr; }
    .formula-grid { grid-template-columns: 1fr; }
    .physics-grid { grid-template-columns: 1fr; }
    .calculator-wrap { grid-template-columns: 1fr; }
    .calc-results { border-left: none; border-top: 4px solid var(--color-primary); }
    .scenario-grid { grid-template-columns: 1fr; }
    .compare-stats { grid-template-columns: repeat(2, 1fr); }
    .ellipsoid-cards-grid { grid-template-columns: 1fr; }
}

@media (max-width: 479px) {
    .compare-stats { grid-template-columns: 1fr; }
    .input-with-select { flex-direction: column; }
    .input-with-select select { width: 100%; }
    .calc-results { padding: var(--space-lg); }
    .calc-inputs { padding: var(--space-lg); }
}