/* ═══════════════════════════════════════════════════════════════
   TỨ KHÓA & TAM TRUYỀN Layout
   ═══════════════════════════════════════════════════════════════ */
.tu-khoa-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    max-width: 960px;
    margin: 0 auto;
}

.khoa-card {
    border: 2px solid #ddd;
    border-radius: 8px;
    padding: 12px;
    text-align: center;
    background: #fff;
    transition: all 0.2s;
}

.khoa-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.khoa-card.positive { border-color: #27ae60; }
.khoa-card.negative { border-color: #e74c3c; }
.khoa-card.neutral  { border-color: #f39c12; }

.khoa-number {
    font-size: 1.5rem;
    font-weight: bold;
    color: #2c3e50;
}

.khoa-chi {
    font-size: 1.2rem;
    margin: 6px 0;
}

.khoa-chi .thuong {
    display: block;
    font-weight: bold;
    color: #3498db;
    font-size: 1.3rem;
}

.khoa-chi .arrow {
    color: #95a5a6;
    font-size: 0.8rem;
}

.khoa-chi .ha {
    display: block;
    color: #7f8c8d;
}

.khoa-role {
    font-size: 0.78rem;
    color: #666;
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px dashed #eee;
}

/* ─── Tam Truyền Flow ───────────────────────────────────────── */
.tam-truyen-flow {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    max-width: 960px;
    margin: 0 auto;
}

.truyen-card {
    flex: 1;
    min-width: 200px;
    max-width: 280px;
    border: 2px solid #3498db;
    border-radius: 12px;
    padding: 16px;
    text-align: center;
    background: #fff;
    position: relative;
}

.truyen-card .truyen-label {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: #3498db;
    color: #fff;
    padding: 2px 12px;
    border-radius: 10px;
    font-size: 0.75rem;
    white-space: nowrap;
}

.truyen-card.so-truyen          { border-color: #e74c3c; }
.truyen-card.so-truyen .truyen-label   { background: #e74c3c; }
.truyen-card.trung-truyen       { border-color: #f39c12; }
.truyen-card.trung-truyen .truyen-label { background: #f39c12; }
.truyen-card.mat-truyen         { border-color: #27ae60; }
.truyen-card.mat-truyen .truyen-label  { background: #27ae60; }

.truyen-arrow {
    font-size: 1.5rem;
    color: #bdc3c7;
}

.truyen-chi {
    font-size: 1.8rem;
    font-weight: bold;
    margin: 8px 0;
}

.truyen-quantum {
    font-size: 0.72rem;
    color: #8e44ad;
    font-style: italic;
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px dashed #d2b4de;
}

/* ═══════════════════════════════════════════════════════════════
   QUANTUM & VEDIC Section
   ═══════════════════════════════════════════════════════════════ */
.quantum-card {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    color: #eee;
    border-radius: 12px;
    padding: 24px;
}

.quantum-card h5 { color: #00d2ff; }

.quantum-card .highlight-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: #00d2ff;
    text-shadow: 0 0 20px rgba(0, 210, 255, 0.5);
}

.quantum-card .formula-box {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(0, 210, 255, 0.3);
    border-radius: 8px;
    padding: 12px;
    margin: 8px 0;
    font-family: 'Courier New', monospace;
}

.quantum-card .vedic-badge {
    display: inline-block;
    background: rgba(255, 193, 7, 0.2);
    color: #ffc107;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    border: 1px solid rgba(255, 193, 7, 0.3);
}

.symmetry-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.symmetry-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 12px;
    border-left: 3px solid #00d2ff;
}

.symmetry-item h6 { color: #74b9ff; margin-bottom: 4px; }
.symmetry-item p  { color: #b2bec3; font-size: 0.85rem; margin: 0; }

/* ═══════════════════════════════════════════════════════════════
   LỤC NHÂM 6 Tổ Hợp
   ═══════════════════════════════════════════════════════════════ */
.luc-nham-cycle {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.nham-item {
    width: 130px;
    text-align: center;
    border: 2px solid #2980b9;
    border-radius: 10px;
    padding: 10px;
    background: #ebf5fb;
    transition: all 0.2s;
}

.nham-item:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(41, 128, 185, 0.3);
}

.nham-item .nham-han {
    font-size: 1.4rem;
    font-weight: bold;
    color: #2980b9;
}

.nham-item .nham-name {
    font-size: 0.85rem;
    font-weight: 600;
}

.nham-item .nham-phase {
    font-size: 0.72rem;
    color: #666;
    margin-top: 4px;
    border-top: 1px dashed #bbb;
    padding-top: 4px;
}

/* ─── Miscellaneous ─────────────────────────────────────────── */
.dong-vat-text {
    font-size: 0.7rem;
    color: #999;
}

.strategy-card {
    max-width: 960px;
    margin: 0 auto;
}

.strategy-icon {
    font-size: 2rem;
}