/* =============================================
   STANDARD DEVIATION CALCULATOR — standard_deviation.css
   Tool-specific styles only.
   Common styles are in tool.css
   ============================================= */

.sd-calc { width: 100%; }

.sd-desc {
    font-size: 14px;
    color: var(--text2);
    margin-bottom: 16px;
    line-height: 1.6;
}

/* Textarea */
.sd-input-wrap { margin-bottom: 14px; }
.sd-textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 15px;
    font-family: var(--font-mono);
    color: var(--text);
    background: var(--white);
    outline: none;
    resize: vertical;
    transition: border-color 0.2s;
    box-sizing: border-box;
    line-height: 1.7;
}
.sd-textarea:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(0,201,167,0.1); }

/* Type radio row */
.sd-type-row {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.sd-type-label { font-size: 14px; font-weight: 600; color: var(--navy); }
.bmi-radio-label { display: flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: var(--text); cursor: pointer; }
.bmi-radio-label input[type="radio"] { width: 17px; height: 17px; accent-color: var(--teal); cursor: pointer; }

/* Result box */
.sd-result-box {
    margin-top: 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}
.sd-result-header {
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy2) 100%);
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    padding: 10px 18px;
}

/* Summary cards */
.sd-summary-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    padding: 16px;
    background: var(--light);
    border-bottom: 1px solid var(--border);
}
.sd-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 14px;
}
.sd-card.highlight { border-color: var(--teal); background: #f0fdf9; }
.sd-card-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 6px;
}
.sd-card-value {
    font-size: 16px;
    font-weight: 700;
    color: var(--navy);
    font-family: var(--font-mono);
    word-break: break-all;
}
.sd-card.highlight .sd-card-value { color: var(--teal); font-size: 18px; }

/* Section title */
.sd-section-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--navy);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 12px;
    padding-bottom: 6px;
    border-bottom: 2px solid var(--teal);
    display: inline-block;
}

/* Steps section */
.sd-steps-section {
    padding: 20px 18px;
    border-bottom: 1px solid var(--border);
}
.sd-formula {
    font-size: 16px;
    font-family: var(--font-mono);
    color: var(--navy);
    background: var(--light);
    border-left: 4px solid var(--teal);
    padding: 10px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-weight: 600;
}
.sd-steps-table { width: 100%; margin-bottom: 14px; }
.sd-steps-note { font-size: 12px; color: var(--muted); font-style: italic; }

.sd-calc-steps { display: flex; flex-direction: column; gap: 6px; margin-top: 10px; }
.sd-step {
    font-size: 14px;
    color: var(--text2);
    font-family: var(--font-mono);
    padding: 5px 10px;
    background: var(--light);
    border-radius: 6px;
    border-left: 3px solid var(--border);
}
.sd-step strong { color: var(--navy); }

/* MOE section */
.sd-moe-section {
    padding: 20px 18px;
    border-bottom: 1px solid var(--border);
}
.sd-moe-desc {
    font-size: 13px;
    color: var(--text2);
    margin-bottom: 14px;
    padding: 8px 12px;
    background: var(--light);
    border-radius: 6px;
    border-left: 3px solid var(--teal);
}
.sd-moe-desc strong { color: var(--teal); }
.sd-moe-table { width: 100%; }

/* Error bar */
.sd-bar-wrap {
    width: 120px;
    height: 16px;
    background: #e2e8f0;
    border-radius: 4px;
    position: relative;
    overflow: hidden;
}
.sd-bar-inner {
    position: absolute;
    left: 0; top: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--navy) 0%, var(--teal) 100%);
    border-radius: 4px;
    transition: width 0.4s ease;
}
.sd-bar-marker {
    position: absolute;
    right: 50%;
    top: 0;
    width: 2px;
    height: 100%;
    background: #dc2626;
}

/* Frequency table */
.sd-freq-section {
    padding: 20px 18px;
}
.sd-freq-table { width: 100%; max-width: 400px; }

@media (max-width: 768px) {
    .sd-summary-cards { grid-template-columns: repeat(2, 1fr); }
    .sd-bar-wrap { width: 80px; }
}
@media (max-width: 480px) {
    .sd-summary-cards { grid-template-columns: 1fr 1fr; }
}