.stc-wrap {
    --stc-yellow:       #FFC107;
    --stc-yellow-dark:  #E0A800;
    --stc-yellow-light: #FFF8E1;
    --stc-bg:           #FFFDF5;
    --stc-card:         #FFFFFF;
    --stc-text:         #3A2E00;
    --stc-muted:        #8A7A3D;
    --stc-border:       #F0DDA0;
    --stc-success:      #4CAF50;

    font-family: 'Segoe UI', Tahoma, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--stc-yellow-light) 0%, #FFFFFF 60%);
    color: var(--stc-text);
    padding: 30px 15px;
    display: flex;
    justify-content: center;
    box-sizing: border-box;
}

/* Reset box-sizing inside our wrapper only */
.stc-wrap *,
.stc-wrap *::before,
.stc-wrap *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Inner container */
.stc-container {
    width: 100%;
    max-width: 680px;
}

/* Header */
.stc-header {
    text-align: center;
    margin-bottom: 24px;
}
.stc-fbr-logo {
    display: block;
    margin: 0 auto 10px;
}
.stc-header h2 {
    font-size: 24px !important;
    color: var(--stc-text) !important;
    margin: 0 0 6px !important;
    padding: 0 !important;
    border: none !important;
    font-weight: 800 !important;
    line-height: 1.3 !important;
}
.stc-header p {
    color: var(--stc-text) !important;
    font-size: 17px !important;
    font-weight: 700 !important;
    margin: 0 !important;
}

/* Card */
.stc-card {
    background: var(--stc-card);
    border-radius: 18px;
    padding: 24px;
    box-shadow: 0 8px 24px rgba(200,170,0,0.12);
    border: 1px solid var(--stc-border);
    margin-bottom: 20px;
}

/* Field rows */
.stc-row {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.stc-field {
    flex: 1;
    min-width: 140px;
    margin-bottom: 16px;
}

.stc-field label {
    display: block;
    font-size: 13px !important;
    font-weight: 700 !important;
    color: #000000 !important;
    margin-bottom: 6px !important;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    float: none !important;
    width: auto !important;
}

/* Inputs & selects */
.stc-wrap select,
.stc-wrap input[type="number"] {
    width: 100% !important;
    padding: 12px 14px !important;
    border: 2px solid var(--stc-border) !important;
    border-radius: 10px !important;
    font-size: 16px !important;
    background: #FFFEF8 !important;
    color: var(--stc-text) !important;
    transition: border-color .2s, box-shadow .2s;
    outline: none;
    box-shadow: none !important;
    max-width: 100%;
    height: auto !important;
    line-height: normal !important;
    margin: 0 !important;
    appearance: auto;
    -webkit-appearance: auto;
}
.stc-wrap select:focus,
.stc-wrap input[type="number"]:focus {
    border-color: var(--stc-yellow) !important;
    box-shadow: 0 0 0 3px rgba(255,193,7,0.25) !important;
    outline: none !important;
}

/* Toggle buttons */
.stc-toggle {
    display: flex;
    border: 2px solid var(--stc-border);
    border-radius: 10px;
    overflow: hidden;
}
.stc-toggle button {
    flex: 1;
    padding: 10px 6px !important;
    border: none !important;
    border-radius: 0 !important;
    background: #FFFEF8 !important;
    color: var(--stc-muted) !important;
    font-weight: 600 !important;
    font-size: 14px !important;
    cursor: pointer;
    transition: background .2s, color .2s;
    box-shadow: none !important;
    outline: none;
    line-height: 1.2 !important;
    margin: 0 !important;
    display: block !important;
    width: auto !important;
    text-transform: none !important;
    letter-spacing: normal !important;
    white-space: normal !important;
    word-break: break-word;
    text-align: center !important;
}
.stc-toggle button.stc-active {
    background: var(--stc-yellow) !important;
    color: #3A2E00 !important;
}
.stc-toggle button:hover:not(.stc-active) {
    background: var(--stc-yellow-light) !important;
}

/* Calculate button */
.stc-btn {
    width: 100%;
    padding: 14px !important;
    background: var(--stc-yellow) !important;
    border: none !important;
    border-radius: 10px !important;
    font-size: 16px !important;
    font-weight: 700 !important;
    color: #3A2E00 !important;
    cursor: pointer;
    transition: background .2s, transform .1s;
    box-shadow: 0 4px 12px rgba(255,193,7,0.35) !important;
    display: block;
    text-align: center;
    line-height: 1 !important;
    margin: 0 !important;
    text-decoration: none !important;
    outline: none;
    letter-spacing: normal !important;
    text-transform: none !important;
}
.stc-btn:hover {
    background: var(--stc-yellow-dark) !important;
    color: #3A2E00 !important;
    text-decoration: none !important;
}
.stc-btn:active { transform: scale(0.98); }

/* Results section */
.stc-results { display: none; }
.stc-results.stc-show { display: block; }

/* Results grid */
.stc-result-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 18px;
}
.stc-result-box {
    background: var(--stc-yellow-light);
    border: 1px solid var(--stc-border);
    border-radius: 12px;
    padding: 14px;
    text-align: center;
}
.stc-result-box.stc-full {
    grid-column: 1 / -1;
    background: var(--stc-yellow);
}
.stc-result-box .stc-rlabel {
    font-size: 12px;
    color: #000000;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
    display: block;
}
.stc-result-box.stc-full .stc-rlabel {
    color: #5C4400;
    font-size: 14px;
    font-weight: 800;
}
.stc-result-box .stc-rvalue {
    font-size: 20px;
    font-weight: 800;
    color: var(--stc-text);
    display: block;
    margin: 0;
    padding: 0;
}
.stc-result-box.stc-full .stc-rvalue {
    font-size: 34px;
    font-weight: 900;
}

/* Bar */
.stc-effective-bar { margin-top: 16px; }
.stc-bar-track {
    height: 10px;
    background: var(--stc-yellow-light);
    border-radius: 6px;
    overflow: hidden;
}
.stc-bar-fill {
    height: 100%;
    background: var(--stc-yellow);
    border-radius: 6px;
    transition: width .4s ease;
}
.stc-bar-labels {
    display: flex;
    justify-content: space-between;
    font-size: 15px;
    color: #000000;
    font-weight: 700;
    margin-top: 6px;
}

/* Breakdown table */
.stc-breakdown { margin-top: 20px; }
.stc-breakdown h3 {
    font-size: 14px !important;
    color: #000000 !important;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 10px !important;
    font-weight: 700 !important;
    border: none !important;
    padding: 0 !important;
}
.stc-wrap table {
    width: 100% !important;
    border-collapse: collapse !important;
    font-size: 14px !important;
    border: none !important;
    background: transparent !important;
    margin: 0 !important;
}
.stc-wrap table th,
.stc-wrap table td {
    padding: 8px 6px !important;
    text-align: left !important;
    border: none !important;
    border-bottom: 1px solid var(--stc-border) !important;
    background: transparent !important;
    font-size: 13px !important;
    color: var(--stc-text) !important;
    vertical-align: middle !important;
}
.stc-wrap table th {
    color: #000000 !important;
    font-size: 12px !important;
    text-transform: uppercase;
    font-weight: 700 !important;
}
.stc-wrap table tr.stc-active-slab td {
    background: var(--stc-yellow-light) !important;
    font-weight: 700 !important;
}
.stc-wrap table tr:last-child td {
    border-bottom: none !important;
}

/* Footer note */
.stc-footer-note {
    text-align: center;
    font-size: 12px;
    color: var(--stc-muted);
    margin-top: 10px;
}

/* Responsive */
@media (max-width: 480px) {
    .stc-toggle button {
        font-size: 11.5px !important;
        padding: 10px 3px !important;
    }
    .stc-result-grid {
        grid-template-columns: 1fr;
    }
    .stc-result-box.stc-full {
        grid-column: 1 / -1;
    }
    .stc-result-box.stc-full .stc-rvalue {
        font-size: 24px;
    }
    .stc-wrap table th:nth-child(2),
    .stc-wrap table td:nth-child(2) {
        font-size: 11px !important;
    }
}