:root {
    --primary: rgb(30, 75, 105);
    --accent: rgb(70, 180, 200);
    --light-bg: #f5f7fa;
    --border: #dde2e8;
    --text: #2c3e50;
    --text-light: #6c7a89;
    --ship-color: #e67e22;
    --refactor-color: #3498db;
    --debt-color: #e74c3c;
    --success-color: #27ae60;
    --radius: 8px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--light-bg);
    color: var(--text);
    line-height: 1.5;
}

.container {
    max-width: 820px;
    margin: 0 auto;
    padding: 24px 20px;
}

h2 {
    color: var(--primary);
    font-size: 1.5rem;
    margin-bottom: 4px;
}

.subtitle {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

/* Canvas */
#canvas-container {
    margin-bottom: 14px;
    border-radius: var(--radius);
    overflow: hidden;
}

#canvas-container canvas {
    display: block;
}

/* Action Area */
.action-area {
    margin-bottom: 12px;
}

.sprint-info {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 10px;
}

.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 10px;
}

.action-btn {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 14px 18px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    background: white;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s;
}

.action-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.action-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    transform: none;
}

.action-btn strong {
    font-size: 1rem;
}

.action-btn span {
    font-size: 0.78rem;
    color: var(--text-light);
    line-height: 1.4;
}

.ship-btn {
    border-color: var(--ship-color);
}

.ship-btn strong {
    color: var(--ship-color);
}

.ship-btn:hover:not(:disabled) {
    background: #fef6ee;
}

.refactor-btn {
    border-color: var(--refactor-color);
}

.refactor-btn strong {
    color: var(--refactor-color);
}

.refactor-btn:hover:not(:disabled) {
    background: #eef6fb;
}

/* Prediction */
.prediction {
    display: flex;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--text-light);
}

.pred-ship, .pred-refactor {
    padding: 4px 10px;
    border-radius: 4px;
    background: var(--light-bg);
}

.pred-ship::before {
    content: "\25CF ";
    color: var(--ship-color);
}

.pred-refactor::before {
    content: "\25CF ";
    color: var(--refactor-color);
}

/* Sprint Result */
.sprint-result {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 16px;
    font-size: 0.85rem;
    margin-bottom: 12px;
    box-shadow: var(--shadow);
}

/* Summary Panel */
.summary-panel {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 22px;
    box-shadow: var(--shadow);
    margin-bottom: 14px;
}

.summary-panel h4 {
    color: var(--primary);
    font-size: 1rem;
    margin-bottom: 12px;
}

.summary-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 14px;
}

.summary-stat {
    text-align: center;
    padding: 12px 8px;
    border-radius: 6px;
    background: var(--light-bg);
}

.summary-stat .stat-number {
    display: block;
    font-size: 1.6rem;
    font-weight: 800;
    font-family: "SF Mono", "Fira Code", monospace;
}

.summary-stat .stat-desc {
    display: block;
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: 2px;
}

.summary-stat.yours .stat-number { color: var(--primary); }
.summary-stat.balanced .stat-number { color: var(--success-color); }
.summary-stat.rush .stat-number { color: var(--debt-color); }

.summary-panel p {
    font-size: 0.88rem;
    line-height: 1.6;
    color: var(--text);
}

/* Bottom Bar */
.bottom-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.feature-total {
    font-size: 0.9rem;
    color: var(--text);
}

.feature-total strong {
    font-size: 1.1rem;
    color: var(--primary);
    font-family: "SF Mono", "Fira Code", monospace;
}

.btn {
    padding: 8px 20px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    background: white;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    color: var(--text);
    transition: all 0.2s;
}

.btn:hover {
    background: var(--light-bg);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

/* Responsive */
@media (max-width: 600px) {
    .action-buttons {
        grid-template-columns: 1fr;
    }

    .prediction {
        flex-direction: column;
        gap: 6px;
    }

    .summary-stats {
        grid-template-columns: 1fr;
    }
}