/* Biến nội bộ */
.pit-neo-wrapper {
    --bg-white: #ffffff;
    --border-ink: 3px solid #111111;
    --shadow-solid: 5px 5px 0px #111111;
    --shadow-push: 2px 2px 0px #111111;
    
    /* Bảng màu Thuế/Tài chính */
    --clr-money: #06d6a0;    /* Xanh thực nhận */
    --clr-tax: #ef233c;      /* Đỏ Thuế */
    --clr-deduct: #ffd166;   /* Vàng giảm trừ */
    --clr-bg: #f8f9fa;

    max-width: 900px;
    margin: 0 auto;
    font-family: system-ui, -apple-system, sans-serif;
    color: #111111;
    background: var(--clr-bg);
    padding: 20px;
    border: var(--border-ink);
    border-radius: 16px;
    box-shadow: 8px 8px 0px #111;
}

.pit-neo-wrapper * { box-sizing: border-box; }

.pit-neo-header { background: #111; color: #fff; border: var(--border-ink); box-shadow: 5px 5px 0px var(--clr-money); padding: 20px; border-radius: 12px; text-align: center; margin-bottom: 25px; }
.pit-neo-header h2 { margin: 0 0 10px 0; font-size: 1.8rem; font-weight: 900; text-transform: uppercase;}
.pit-neo-header p { margin: 0; font-weight: 800; font-size: 0.95rem; }

.pit-neo-form { display: flex; flex-direction: column; gap: 20px; }
.pit-form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.pit-group { display: flex; flex-direction: column; gap: 8px; }
.pit-group label { font-weight: 900; font-size: 1.05rem; color: #111; }

/* CSS FIX CHUẨN Ô INPUT & SELECT */
.input-with-select { 
    display: flex; flex-wrap: nowrap; align-items: stretch; border: var(--border-ink); border-radius: 12px; box-shadow: 4px 4px 0px #111; background: #fff; overflow: hidden; width: 100%;
}
.input-with-select input { 
    border: none !important; border-radius: 0 !important; box-shadow: none !important; flex: 1; width: 100%; min-width: 50%; padding: 16px 15px !important; font-size: 1.25rem !important; font-weight: 900; color: #111; outline: none;
}
.input-with-select select { 
    border: none; border-left: 3px solid #111; padding: 0 15px; font-weight: 900; font-size: 1rem; background: #e9ecef; outline: none; cursor: pointer; color: #111; flex: 0 0 auto; width: 80px; text-align: center;
}
.input-with-select input:focus { background: #e0fbfc; }

/* Real-time Currency Format */
.live-currency-format {
    font-size: 0.95rem;
    font-weight: 900;
    color: #0077b6; /* Xanh dương đậm */
    margin-top: 2px;
    padding-left: 5px;
    min-height: 1.2em;
    transition: all 0.2s;
}

/* Quick Tags */
.quick-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.q-tag { padding: 4px 12px; border: 2px solid #111; border-radius: 20px; font-size: 0.85rem; font-weight: 800; cursor: pointer; background: #fff; box-shadow: 2px 2px 0px #111; color: #111; transition: transform 0.1s;}
.q-tag:hover { background: var(--clr-deduct); }
.q-tag:active { box-shadow: 0px 0px 0px #111; transform: translate(2px,2px); }
.btn-calc-ins { background: #111; color: #fff; }
.btn-calc-ins:hover { background: #333; color: #fff;}

.pit-helper-black { font-size: 0.95rem; font-weight: 800; background: #e9ecef; padding: 15px; border-radius: 8px; border: 2px dashed #111; line-height: 1.5; margin-top: 5px;}

/* Button */
.pit-neo-btn { padding: 18px; font-size: 1.2rem; font-weight: 900; background: #111; color: #fff; border: var(--border-ink); border-radius: 12px; box-shadow: 5px 5px 0px var(--clr-money); cursor: pointer; text-transform: uppercase; transition: all 0.1s; margin-top: 5px; letter-spacing: 1px;}
.pit-neo-btn:active { box-shadow: 2px 2px 0px var(--clr-money); transform: translate(3px, 3px); }

/* Result Layout */
.pit-neo-result { margin-top: 30px; padding-top: 25px; border-top: 4px dashed #111; display: flex; flex-direction: column; gap: 20px;}
.pit-neo-result.active { display: flex !important; animation: pitAnim 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards; }

.pit-result-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 15px; }
.pit-card { border: var(--border-ink); box-shadow: var(--shadow-solid); border-radius: 12px; padding: 25px 15px; text-align: center; display: flex; flex-direction: column; justify-content: center; align-items: center;}
.card-net { background: var(--clr-money); color: #111; }
.card-tax { background: var(--clr-tax); color: #fff; }
.card-tax h4, .card-tax .val-desc { color: #ffe6e6; }

.pit-card h4 { margin: 0 0 10px 0; font-size: 1.1rem; font-weight: 900; text-transform: uppercase;}
.val-text { font-size: 2.8rem; font-weight: 900; line-height: 1.1; margin-bottom: 8px; word-break: break-all;}
.val-text small { font-size: 1.2rem; font-weight: 900; margin-left: 5px;}
.val-desc { margin: 0; font-size: 1rem; font-weight: 800; background: rgba(0,0,0,0.1); padding: 5px 15px; border-radius: 20px;}

/* Hướng dẫn giải */
.pit-solution-box { background: #fff; border: var(--border-ink); border-radius: 12px; padding: 20px; box-shadow: var(--shadow-solid);}
.pit-solution-box h3 { margin: 0 0 15px 0; font-size: 1.2rem; font-weight: 900; text-transform: uppercase; border-bottom: 3px solid #111; padding-bottom: 10px;}
.step-box p { font-size: 1.05rem; font-weight: 800; margin: 8px 0 10px 0; }
.math-line { font-family: monospace, system-ui; font-size: 1.1rem !important; font-weight: 900 !important; color: #111 !important; background: #f8f9fa; padding: 15px; border-radius: 8px; border: 2px solid #111; overflow-x: auto;}

/* Bảng Thuế */
.pit-table-box { background: #fff; border: var(--border-ink); border-radius: 12px; padding: 20px; box-shadow: var(--shadow-solid);}
.pit-table-box h3 { margin: 0 0 15px 0; font-size: 1.2rem; font-weight: 900; text-transform: uppercase;}
.table-responsive { overflow-x: auto; }
.neo-table { width: 100%; border-collapse: collapse; text-align: right; font-family: monospace, system-ui; font-size: 1rem;}
.neo-table th, .neo-table td { border: 2px solid #111; padding: 10px; font-weight: 700; white-space: nowrap;}
.neo-table th { background: #111; color: #fff; text-align: center; text-transform: uppercase; font-family: system-ui, sans-serif;}
.neo-table tbody tr:hover { background: #e0fbfc; }
.neo-table td:nth-child(1), .neo-table td:nth-child(3) { text-align: center; }

/* CANVAS ĐỒ THỊ */
.pit-canvas-box { background: #fff; border: var(--border-ink); border-radius: 12px; padding: 20px; box-shadow: var(--shadow-solid); text-align: center;}
.pit-canvas-box h3 { margin: 0 0 15px 0; font-size: 1.2rem; font-weight: 900; text-transform: uppercase;}
#pitCanvas { width: 100%; max-width: 100%; height: auto; }

.canvas-legend { display: flex; justify-content: center; gap: 20px; margin-top: 15px; flex-wrap: wrap;}
.lg-item { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 0.95rem;}
.lg-color { width: 15px; height: 15px; border: 2px solid #111; border-radius: 3px; }
.bg-net { background: var(--clr-money); }
.bg-deduct { background: var(--clr-deduct); }
.bg-tax { background: var(--clr-tax); }

@keyframes pitAnim { 0% { opacity: 0; transform: translateY(20px); } 100% { opacity: 1; transform: translateY(0); } }

@media (max-width: 700px) {
    .pit-form-grid, .pit-result-grid { grid-template-columns: 1fr; }
}