:root {
    --bg: #1a1a2e;
    --card-bg: #16213e;
    --card-border: #0f3460;
    --primary: #e94560;
    --primary-hover: #ff6b6b;
    --text: #eaeaea;
    --text-dim: #a0a0b0;
    --success: #4ecdc4;
    --warning: #f39c12;
    --danger: #e74c3c;
    --input-bg: #0f3460;
    --input-border: #533483;
}

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

body {
    font-family: 'Segoe UI', 'Microsoft JhengHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2.2rem;
    margin-bottom: 0.3rem;
}

.subtitle {
    color: var(--text-dim);
    font-size: 1rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card h2 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.section-hint {
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

/* Form Grid */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 0.3rem;
}

.form-group input {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 6px;
    padding: 0.5rem 0.7rem;
    color: var(--text);
    font-size: 1rem;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group .hint {
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-top: 0.2rem;
}

/* Scroll Table */
.scroll-table-wrapper {
    overflow-x: auto;
}

.scroll-table {
    width: 100%;
    border-collapse: collapse;
}

.scroll-table th,
.scroll-table td {
    padding: 0.6rem 0.5rem;
    text-align: center;
    border-bottom: 1px solid var(--card-border);
}

.scroll-table th {
    font-size: 0.85rem;
    color: var(--text-dim);
    font-weight: 600;
}

.scroll-table input[type="number"],
.scroll-table input[type="text"] {
    width: 100px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 4px;
    padding: 0.3rem 0.5rem;
    color: var(--text);
    font-size: 0.9rem;
    text-align: center;
}

.scroll-table input[type="number"]:focus,
.scroll-table input[type="text"]:focus {
    outline: none;
    border-color: var(--primary);
}

.scroll-table input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.badge {
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-safe {
    background: rgba(78, 205, 196, 0.2);
    color: var(--success);
}

.badge-curse {
    background: rgba(231, 76, 60, 0.2);
    color: var(--danger);
}

/* Sub Products */
.sub-product-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.sub-product-row label {
    font-size: 0.85rem;
    color: var(--text-dim);
}

.sub-product-row input {
    width: 140px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 4px;
    padding: 0.4rem 0.5rem;
    color: var(--text);
    font-size: 0.9rem;
}

.sub-product-row input:focus {
    outline: none;
    border-color: var(--primary);
}

.btn-remove {
    background: rgba(231, 76, 60, 0.3);
    border: none;
    color: var(--danger);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-remove:hover {
    background: rgba(231, 76, 60, 0.6);
}

.btn-add {
    background: transparent;
    border: 1px dashed var(--input-border);
    color: var(--text-dim);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

.btn-add:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Action Bar */
.action-bar {
    text-align: center;
    margin: 1.5rem 0;
}

.btn-calculate {
    background: var(--primary);
    border: none;
    color: white;
    padding: 0.8rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-calculate:hover {
    background: var(--primary-hover);
}

.calc-hint {
    display: block;
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-top: 0.5rem;
}

/* Results */
.result-card {
    border-color: var(--primary);
}

.result-summary {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.result-item {
    background: var(--input-bg);
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
}

.result-item .label {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 0.3rem;
}

.result-item .value {
    font-size: 1.3rem;
    font-weight: 700;
}

.value-positive {
    color: var(--success);
}

.value-negative {
    color: var(--danger);
}

.value-neutral {
    color: var(--warning);
}

.route-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.route-table th,
.route-table td {
    padding: 0.5rem;
    text-align: center;
    border-bottom: 1px solid var(--card-border);
    font-size: 0.9rem;
}

.route-table th {
    color: var(--text-dim);
    font-weight: 600;
}

.route-table tr.highlight {
    background: rgba(233, 69, 96, 0.1);
}

.simple-route-box {
    background: rgba(0, 200, 100, 0.08);
    border: 1px solid rgba(0, 200, 100, 0.3);
    border-radius: 8px;
    padding: 1rem 1.2rem;
    margin-bottom: 1rem;
}

.route-label {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 0.3rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.route-sequence {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--success);
    word-break: break-all;
}

.stop-conditions {
    background: rgba(233, 69, 96, 0.06);
    border: 1px solid rgba(233, 69, 96, 0.2);
    border-radius: 8px;
    padding: 0.8rem 1rem;
}

.stop-label {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.4rem;
    color: var(--danger);
}

.stop-conditions ul {
    margin: 0;
    padding-left: 1.2rem;
    font-size: 0.85rem;
    color: var(--text-dim);
}

.stop-conditions li {
    margin-bottom: 0.2rem;
}

.detail-section {
    margin-top: 1.5rem;
}

.detail-section h3 {
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    color: var(--success);
}

.probability-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.4rem;
}

.probability-bar .bar-label {
    width: 120px;
    font-size: 0.85rem;
    text-align: right;
    color: var(--text-dim);
}

.probability-bar .bar-track {
    flex: 1;
    height: 20px;
    background: var(--input-bg);
    border-radius: 4px;
    overflow: hidden;
}

.probability-bar .bar-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 4px;
    transition: width 0.3s;
}

.probability-bar .bar-value {
    width: 60px;
    font-size: 0.85rem;
    color: var(--text);
}

/* Footer */
footer {
    text-align: center;
    margin-top: 2rem;
    color: var(--text-dim);
    font-size: 0.8rem;
}

/* Recommendation Box */
.recommendation-box {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    padding: 1.2rem;
    border-radius: 8px;
    border: 2px solid;
}

.recommendation-box.recommend-scroll {
    border-color: #4caf50;
    background: rgba(76, 175, 80, 0.08);
}

.recommendation-box.recommend-buy {
    border-color: #ff9800;
    background: rgba(255, 152, 0, 0.08);
}

.recommendation-box.recommend-info {
    border-color: #89b4fa;
    background: rgba(137, 180, 250, 0.08);
}

.rec-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.rec-text {
    font-size: 0.95rem;
    line-height: 1.6;
}

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

/* Strategy Cards (TOP 5) */
.top5-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.strategy-card {
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 1rem 1.2rem;
    transition: border-color 0.2s;
}

.strategy-card:hover {
    border-color: var(--primary);
}

.strategy-recommended {
    border-color: var(--success);
    background: rgba(78, 205, 196, 0.05);
}

.strategy-header {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.6rem;
}

.strategy-rank {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
    min-width: 30px;
}

.strategy-name {
    font-weight: 600;
    font-size: 1rem;
}

.strategy-badge {
    background: rgba(78, 205, 196, 0.2);
    color: var(--success);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.strategy-badge:first-of-type {
    margin-left: auto;
}

.strategy-body {
    padding-left: 30px;
}

.strategy-desc {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 0.4rem;
}

.strategy-route {
    font-size: 0.85rem;
    color: var(--success);
    font-family: monospace;
    margin-bottom: 0.6rem;
    word-break: break-all;
}

.strategy-stats {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-dim);
}

.stat-value {
    font-size: 1rem;
    font-weight: 600;
}

.highlight-cost .stat-value {
    color: var(--primary);
    font-size: 1.1rem;
}

/* Break-even Box */
.breakeven-box {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.breakeven-item {
    background: var(--input-bg);
    border-radius: 10px;
    padding: 1.2rem;
    flex: 1;
    min-width: 200px;
    text-align: center;
}

.breakeven-main {
    border: 2px solid var(--primary);
}

.breakeven-label {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 0.3rem;
}

.breakeven-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.breakeven-hint {
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-top: 0.3rem;
}

/* Sub product suggest */
.sub-product-suggest {
    margin-top: 1.5rem;
}

.sub-product-suggest h4 {
    color: var(--success);
    margin-bottom: 0.5rem;
}

/* MC Verify */
.mc-verify {
    margin-top: 1rem;
    padding: 0.8rem 1rem;
    background: rgba(137, 180, 250, 0.08);
    border: 1px solid rgba(137, 180, 250, 0.3);
    border-radius: 8px;
    font-size: 0.9rem;
}

/* Progress Bar */
.progress-container {
    margin: 1rem 0;
    padding: 1rem 1.5rem;
    background: var(--card-bg, #1e1e2e);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.progress-label {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    color: var(--text, #cdd6f4);
}

.progress-track {
    width: 100%;
    height: 12px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #89b4fa, #74c7ec);
    border-radius: 6px;
    transition: width 0.15s ease;
}

.btn-calculate:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Preset Management */
.preset-card {
    border: 1px dashed var(--card-border);
}

.preset-bar {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-bottom: 0.5rem;
}

.preset-bar:last-child {
    margin-bottom: 0;
}

.preset-bar select,
.preset-bar input[type="text"] {
    flex: 1;
    padding: 0.5rem 0.75rem;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 6px;
    color: var(--text);
    font-size: 0.9rem;
}

.preset-bar select:focus,
.preset-bar input[type="text"]:focus {
    outline: none;
    border-color: var(--primary);
}

.btn-preset {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-load {
    background: #89b4fa;
    color: #1a1a2e;
}

.btn-load:hover {
    background: #74c7ec;
}

.btn-save {
    background: var(--success);
    color: #1a1a2e;
}

.btn-save:hover {
    background: #6ee7b7;
}

.btn-delete {
    background: var(--danger);
    color: #fff;
}

.btn-delete:hover {
    background: #ff6b6b;
}

/* Toast notification */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--card-bg);
    border: 1px solid var(--primary);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 0.95rem;
    color: var(--text);
    opacity: 0;
    transition: all 0.3s ease;
    pointer-events: none;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.toast-show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        padding: 1rem 0.5rem;
    }
    .form-grid {
        grid-template-columns: 1fr 1fr;
    }
    .scroll-table input[type="number"],
    .scroll-table input[type="text"] {
        width: 80px;
    }
    .sub-product-row input {
        width: 100px;
    }
    .recommendation-box {
        flex-direction: column;
        text-align: center;
    }
}

/* Materials Box */
.materials-box {
    margin-top: 0.5rem;
    padding: 0.5rem 0.7rem;
    background: rgba(255, 193, 7, 0.08);
    border: 1px solid rgba(255, 193, 7, 0.25);
    border-radius: 6px;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 1rem;
    align-items: center;
    font-size: 0.85rem;
}
.materials-title {
    font-weight: 600;
    color: var(--accent);
    margin-right: 0.3rem;
}
.materials-item {
    color: var(--text-main);
    white-space: nowrap;
}

/* Input Summary (for screenshot) */
.input-summary {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 0.6rem;
    margin-bottom: 0.8rem;
}
.input-summary-item {
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 0.6rem 0.8rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.input-summary-label {
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-bottom: 0.2rem;
}
.input-summary-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
}
.input-summary-scrolls {
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 0.6rem 0.8rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 0.8rem;
    align-items: center;
}
.input-summary-scrolls-title {
    font-size: 0.8rem;
    color: var(--text-dim);
    font-weight: 600;
    margin-right: 0.3rem;
}
.input-summary-scroll-tag {
    background: rgba(137, 180, 250, 0.15);
    border: 1px solid rgba(137, 180, 250, 0.3);
    border-radius: 4px;
    padding: 0.2rem 0.6rem;
    font-size: 0.8rem;
    color: var(--text);
    white-space: nowrap;
}