/* ===== Tips 页面特有样式 - 绿色主题 ===== */

.navbar a:hover,
.navbar a.active {
    color: #2ecc71;
    border-bottom-color: #2ecc71;
}

header {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

header .sub {
    color: #fff;
    opacity: 0.85;
    font-size: 0.95em;
    margin-top: 8px;
}

.section h2 {
    font-size: 1.4em;
    color: #2ecc71;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid #f0f0f0;
}

.section h3 {
    font-size: 1.1em;
    color: #555;
    margin: 20px 0 10px;
}

.tip-box {
    background: #e8f8f0;
    border-left: 4px solid #2ecc71;
    padding: 16px 20px;
    border-radius: 8px;
    margin: 16px 0;
}

.tip-box p {
    margin: 0;
    color: #444;
}

.tip-box strong {
    color: #27ae60;
}

.warn-box {
    background: #fff8f0;
    border-left: 4px solid #ff9800;
    padding: 16px 20px;
    border-radius: 8px;
    margin: 16px 0;
}

.warn-box p {
    margin: 0;
    color: #666;
}

.demo-grid {
    display: inline-grid;
    grid-template-columns: repeat(5, 36px);
    gap: 2px;
    margin: 12px 0;
}

.demo-cell {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #e0e0e0;
    border-radius: 4px;
    font-weight: bold;
    font-size: 0.9em;
}

.demo-cell.bomb { background: #ffcdd2; }
.demo-cell.revealed { background: #fff; border: 1px solid #ddd; }
.demo-cell.flag { background: #fff3e0; color: #e65100; }
.demo-cell.n1 { color: #2196f3; }
.demo-cell.n2 { color: #4caf50; }
.demo-cell.n3 { color: #f44336; }

.difficulty {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.8em;
    font-weight: 600;
    margin-left: 8px;
}

.difficulty.easy { background: #e8f5e9; color: #2e7d32; }
.difficulty.medium { background: #fff3e0; color: #e65100; }
.difficulty.hard { background: #ffebee; color: #c62828; }

.cta a {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.cta a:hover {
    box-shadow: 0 6px 20px rgba(46, 204, 113, 0.4);
}