/*
 * stddev-calculator.css v1.0
 * Scoped to #sd-app — no theme interference.
 * Slate/indigo accent: analytical/statistical feel, distinct from entire suite.
 */

#sd-app {
    display: block; box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    font-size: 15px; line-height: 1.5; color: #1a202c;
    background-color: #f7f6f1; padding: 1.75rem 1rem;
    max-width: 960px; margin-left: auto; margin-right: auto;
    -webkit-text-size-adjust: 100%;
}
#sd-app *, #sd-app *::before, #sd-app *::after { box-sizing: border-box; }

/* ── Typography ── */
#sd-app .sd-title {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    font-size: clamp(1.2rem, 2.8vw, 1.75rem); font-weight: 700; line-height: 1.2;
    letter-spacing: -0.02em; color: #0d1117; margin: 0; padding: 0; border: none; background: none;
}
#sd-app .sd-subtitle {
    display: block; font-size: 0.65em; font-weight: 400; color: #4a5568;
    letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 0.2rem;
}
#sd-app h3.sd-chart-title-text {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
    color: #f7f6f1; margin: 0; padding: 0; border: none; background: none;
}

/* ── Masthead ── */
#sd-app .sd-head {
    display: flex; align-items: flex-end; justify-content: space-between;
    gap: 1rem; flex-wrap: wrap;
    border-top: 4px solid #4338ca;
    border-bottom: 1px solid #d6d0c4; border-left: none; border-right: none;
    padding: 1.25rem 0 1rem; margin: 0 0 1.5rem 0; background: none;
}
#sd-app .sd-badge {
    display: inline-block;
    font-family: ui-monospace, "Courier New", Courier, monospace;
    font-size: 0.7rem; line-height: 1.4;
    background-color: #4338ca; color: #eef2ff;
    padding: 0.3rem 0.7rem; border-radius: 2px; border: none; white-space: nowrap; margin: 0;
}

/* ── Mode tabs ── */
#sd-app .sd-mode-tabs {
    display: flex; gap: 0; margin: 0 0 1.5rem 0; padding: 0;
    border-bottom: 2px solid #d6d0c4; flex-wrap: wrap;
}
#sd-app .sd-mode-tab {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    font-size: 0.75rem; font-weight: 600; letter-spacing: 0.03em;
    color: #6b7280; background: none; border: none;
    border-bottom: 2px solid transparent; margin: 0 0 -2px 0;
    padding: 0.55rem 1.1rem; cursor: pointer;
    -webkit-appearance: none; appearance: none;
    transition: color 0.15s, border-color 0.15s;
}
#sd-app .sd-mode-tab:hover { color: #0d1117; }
#sd-app .sd-mode-tab.sd-mode-active { color: #4338ca; border-bottom-color: #4338ca; font-weight: 700; }

/* ── Card ── */
#sd-app .sd-card {
    background-color: #ede9df; border: 1px solid #d6d0c4;
    border-radius: 4px; padding: 1.25rem; margin: 0 0 1.5rem 0;
}
#sd-app .sd-card-title {
    display: block; font-size: 0.65rem; font-weight: 700; letter-spacing: 0.14em;
    text-transform: uppercase; color: #4a5568;
    padding: 0 0 0.6rem 0; margin: 0 0 1rem 0;
    border-bottom: 1px solid #d6d0c4;
    border-top: none; border-left: none; border-right: none; background: none;
}

/* ── Grid ── */
#sd-app .sd-grid { display: grid; gap: 0.85rem; margin: 0 0 1rem 0; padding: 0; }
#sd-app .sd-grid-2 { grid-template-columns: 1fr 1fr; }
#sd-app .sd-grid-3 { grid-template-columns: 1fr 1fr 1fr; }
#sd-app .sd-span-2 { grid-column: span 2; }
@media (max-width: 580px) {
    #sd-app .sd-grid-2 { grid-template-columns: 1fr; }
    #sd-app .sd-grid-3 { grid-template-columns: 1fr; }
    #sd-app .sd-span-2 { grid-column: span 1; }
}

/* ── Fields ── */
#sd-app .sd-field { display: flex; flex-direction: column; gap: 0.3rem; }
#sd-app .sd-label {
    display: block; font-size: 0.63rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.1em; color: #4a5568; margin: 0; padding: 0;
}
#sd-app .sd-input, #sd-app .sd-textarea {
    display: block; width: 100%;
    font-family: ui-monospace, "Courier New", Courier, monospace;
    font-size: 0.85rem; line-height: 1.4; color: #0d1117;
    background-color: #ffffff; border: 1px solid #d6d0c4; border-radius: 2px;
    padding: 0.45rem 0.55rem; margin: 0; outline: none; box-shadow: none;
    -webkit-appearance: none; appearance: none; transition: border-color 0.15s;
}
#sd-app .sd-textarea { resize: vertical; font-size: 0.8rem; }
#sd-app .sd-input:focus,
#sd-app .sd-textarea:focus { border-color: #4338ca; outline: none; box-shadow: none; }
#sd-app .sd-hint {
    font-size: 0.62rem; color: #6b7280; font-style: italic; margin: 0; padding: 0;
}
#sd-app .sd-ss-intro {
    font-size: 0.82rem; color: #374151; background: #ffffff;
    border: 1px solid #d6d0c4; border-radius: 3px;
    padding: 0.65rem 0.85rem; margin: 0 0 1rem 0;
    font-family: ui-monospace, "Courier New", Courier, monospace;
}

/* ── Buttons ── */
#sd-app .sd-actions { display: flex; gap: 0.6rem; margin: 1rem 0 0 0; padding: 0; flex-wrap: wrap; }
#sd-app .sd-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    font-size: 0.75rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
    text-decoration: none; color: #0d1117;
    background-color: #f7f6f1; border: 1px solid #d6d0c4; border-radius: 2px;
    padding: 0.55rem 1.1rem; margin: 0; cursor: pointer; user-select: none;
    white-space: nowrap; outline: none; box-shadow: none;
    -webkit-appearance: none; appearance: none; transition: opacity 0.15s; line-height: 1;
}
#sd-app .sd-btn:hover  { opacity: 0.82; }
#sd-app .sd-btn:active { opacity: 0.65; }
#sd-app .sd-btn:focus  { outline: 2px solid #4338ca; outline-offset: 2px; }
#sd-app .sd-btn-primary { background-color: #0d1117; color: #f7f6f1; border-color: #0d1117; }
#sd-app .sd-btn-ghost   { background-color: transparent; color: #4a5568; border-color: #d6d0c4; }
#sd-app .sd-btn-add     { background-color: #f7f6f1; color: #0d1117; border-color: #d6d0c4; }

/* ── Stats ── */
#sd-app .sd-stats {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1px; background-color: #d6d0c4;
    border: 1px solid #d6d0c4; border-radius: 4px; overflow: hidden;
    margin: 0 0 1.5rem 0; padding: 0;
}
#sd-app .sd-stat { background-color: #ffffff; padding: 0.85rem 1rem; margin: 0; }
#sd-app .sd-stat-label {
    display: block; font-size: 0.6rem; font-weight: 700; letter-spacing: 0.12em;
    text-transform: uppercase; color: #4a5568; margin: 0 0 0.3rem 0; padding: 0;
}
#sd-app .sd-stat-val {
    display: block;
    font-family: ui-monospace, "Courier New", Courier, monospace;
    font-size: 1.3rem; font-weight: 500; line-height: 1; color: #0d1117;
    margin: 0 0 0.2rem 0; padding: 0;
}
#sd-app .sd-stat-sub {
    display: block;
    font-family: ui-monospace, "Courier New", Courier, monospace;
    font-size: 0.62rem; color: #4a5568; margin: 0; padding: 0;
}
#sd-app .sd-val-indigo { color: #4338ca; }
#sd-app .sd-val-good   { color: #15803d; }
#sd-app .sd-val-warn   { color: #d97706; }
#sd-app .sd-val-bad    { color: #dc2626; }
#sd-app .sd-val-eq     { color: #4a5568; }

/* ── CI Panel ── */
#sd-app .sd-ci-panel {
    background-color: #1e1b4b; border-radius: 4px; padding: 1.1rem 1.4rem;
    margin: 0 0 1.5rem 0; display: flex; gap: 1.5rem; flex-wrap: wrap; align-items: center;
}
#sd-app .sd-ci-item { flex: 1; min-width: 150px; }
#sd-app .sd-ci-label {
    font-size: 0.6rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
    color: #818cf8; margin: 0 0 0.25rem 0;
}
#sd-app .sd-ci-val {
    font-family: ui-monospace, "Courier New", Courier, monospace;
    font-size: 1.05rem; font-weight: 700; color: #ffffff; margin: 0 0 0.15rem 0;
}
#sd-app .sd-ci-sub {
    font-family: ui-monospace, "Courier New", Courier, monospace;
    font-size: 0.62rem; color: #6b7280; margin: 0;
}

/* ── Charts row (histogram + box) ── */
#sd-app .sd-charts-row {
    display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 0 0 1.5rem 0;
}
@media (max-width: 580px) { #sd-app .sd-charts-row { grid-template-columns: 1fr; } }
#sd-app .sd-chart-box {
    border: 1px solid #d6d0c4; border-radius: 4px; overflow: hidden; background: #ffffff;
}
#sd-app .sd-chart-box-title {
    font-size: 0.65rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
    color: #4a5568; padding: 0.6rem 0.9rem;
    background-color: #ede9df; border-bottom: 1px solid #d6d0c4; margin: 0;
}
#sd-app .sd-chart-box-body { padding: 0.75rem; background: #ffffff; }
#sd-app .sd-chart-box canvas { display: block; width: 100% !important; }

/* ── Control chart wrap ── */
#sd-app .sd-ctrl-wrap {
    border: 1px solid #d6d0c4; border-radius: 4px; overflow: hidden; margin: 0 0 1.5rem 0;
}
#sd-app .sd-chart-head {
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: 0.5rem;
    background-color: #0d1117; padding: 0.75rem 1.1rem; margin: 0;
}
#sd-app .sd-legend {
    display: flex; flex-wrap: wrap; gap: 0.7rem;
    font-family: ui-monospace, "Courier New", Courier, monospace;
    font-size: 0.65rem; color: #c8c4bc; margin: 0; padding: 0;
}
#sd-app .sd-legend-item { display: flex; align-items: center; gap: 5px; color: #c8c4bc; margin: 0; padding: 0; }
#sd-app .sd-swatch {
    display: inline-block; width: 10px; height: 10px; border-radius: 1px; flex-shrink: 0;
}
#sd-app .sd-sw-data  { background-color: rgba(67,56,202,0.9); }
#sd-app .sd-sw-mean  { background-color: rgba(220,38,38,0.8); }
#sd-app .sd-sw-1s    { background-color: rgba(5,150,105,0.6); }
#sd-app .sd-sw-2s    { background-color: rgba(217,119,6,0.6); }
#sd-app .sd-sw-3s    { background-color: rgba(220,38,38,0.5); }
#sd-app .sd-chart-body {
    position: relative; background-color: #ffffff; padding: 1rem;
}
#sd-app canvas { display: block; width: 100% !important; height: auto; }
#sd-app .sd-tooltip {
    position: absolute; background-color: #0d1117; color: #f7f6f1;
    font-family: ui-monospace, "Courier New", Courier, monospace;
    font-size: 0.72rem; line-height: 1.7; padding: 0.5rem 0.75rem;
    border-radius: 3px; pointer-events: none; white-space: nowrap;
    display: none; z-index: 100; margin: 0;
}

/* ── Multi-period row headers ── */
#sd-app .sd-rows-head {
    display: grid; gap: 0.5rem; align-items: center;
    font-size: 0.62rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
    color: #4a5568; padding: 0 0 0.45rem 0; margin: 0 0 0.4rem 0;
    border-bottom: 1px solid #d6d0c4;
}
#sd-app .sd-multi-head { grid-template-columns: 2fr 0.7fr 1fr 1fr 1fr 1fr 1fr; }
#sd-app .sd-rh-cell  { margin: 0; padding: 0; }
#sd-app .sd-rh-right { text-align: right; }
#sd-app .sd-multi-row {
    display: grid; grid-template-columns: 2fr 0.7fr 1fr 1fr 1fr 1fr 1fr;
    gap: 0.5rem; align-items: center;
    padding: 0.28rem 0; margin: 0; border-bottom: 1px dashed #d6d0c4;
}
#sd-app .sd-multi-row:last-child { border-bottom: none; }
#sd-app .sd-row-label {
    font-family: ui-monospace, "Courier New", Courier, monospace;
    font-size: 0.78rem; color: #4a5568; margin: 0; padding: 0;
}
#sd-app .sd-row-input {
    display: block; width: 100%;
    font-family: ui-monospace, "Courier New", Courier, monospace;
    font-size: 0.78rem; text-align: right; color: #0d1117;
    background-color: #ffffff; border: 1px solid #d6d0c4; border-radius: 2px;
    padding: 0.3rem 0.45rem; margin: 0; outline: none; box-shadow: none;
    -webkit-appearance: none; appearance: none;
}
#sd-app .sd-row-input:focus { border-color: #4338ca; outline: none; }
@media (max-width: 600px) {
    #sd-app .sd-multi-head,
    #sd-app .sd-multi-row { grid-template-columns: 2fr 0.7fr 1fr 1fr; }
    #sd-app .sd-hide-sm   { display: none !important; }
}

/* ── Sample size result panel ── */
#sd-app .sd-ss-result-panel {
    background-color: #1e1b4b; border-radius: 4px; padding: 1.2rem 1.5rem;
    margin: 0 0 1.5rem 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1.2rem;
}
#sd-app .sd-ss-res-item { margin: 0; }
#sd-app .sd-ss-res-label {
    font-size: 0.6rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
    color: #818cf8; margin: 0 0 0.25rem 0;
}
#sd-app .sd-ss-res-val {
    font-family: ui-monospace, "Courier New", Courier, monospace;
    font-size: 1.5rem; font-weight: 700; color: #ffffff; margin: 0 0 0.15rem 0;
}
#sd-app .sd-ss-res-sub {
    font-family: ui-monospace, "Courier New", Courier, monospace;
    font-size: 0.62rem; color: #6b7280; margin: 0;
}
#sd-app .sd-panel-label {
    font-size: 0.65rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
    color: #4a5568; padding: 0.5rem 0; margin: 0 0 0.5rem 0;
}
#sd-app .sd-ss-table-wrap { margin: 0 0 1.5rem 0; }

/* ── Table ── */
#sd-app .sd-table-wrap {
    border: 1px solid #d6d0c4; border-radius: 4px; overflow-x: auto; margin: 0 0 1.5rem 0; padding: 0;
}
#sd-app .sd-table {
    width: 100%; border-collapse: collapse; border-spacing: 0; font-size: 0.78rem; margin: 0; padding: 0;
}
#sd-app .sd-th {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    font-size: 0.58rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
    color: #4a5568; background-color: #ede9df; padding: 0.55rem 0.75rem;
    text-align: right; border-bottom: 2px solid #d6d0c4; white-space: nowrap; margin: 0;
}
#sd-app .sd-th-left { text-align: left; }
#sd-app .sd-table tbody tr td {
    font-family: ui-monospace, "Courier New", Courier, monospace;
    font-size: 0.78rem; padding: 0.5rem 0.75rem; text-align: right;
    border-bottom: 1px solid #d6d0c4; background-color: #ffffff; color: #0d1117; margin: 0;
}
#sd-app .sd-table tbody tr td:first-child {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    text-align: left; color: #4a5568;
}
#sd-app .sd-table tbody tr:last-child td { border-bottom: none; }
#sd-app .sd-table tbody tr:hover td { background-color: #f7f6f1; }

/* ── Download bar ── */
#sd-app .sd-download-bar {
    display: flex; align-items: center; justify-content: space-between;
    gap: 1rem; flex-wrap: wrap;
    background-color: #ede9df; border: 1px solid #d6d0c4; border-radius: 4px;
    padding: 0.9rem 1.25rem; margin: 0 0 1.5rem 0;
}
#sd-app .sd-download-label {
    font-size: 0.68rem; font-weight: 700; letter-spacing: 0.1em;
    text-transform: uppercase; color: #4a5568; margin: 0; padding: 0;
}
#sd-app .sd-btn-download {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.45rem;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    font-size: 0.8rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase;
    text-decoration: none; color: #ffffff; background-color: #4338ca;
    border: none; border-radius: 2px; padding: 0.65rem 1.4rem; margin: 0;
    cursor: pointer; user-select: none; white-space: nowrap;
    outline: none; box-shadow: none; -webkit-appearance: none; appearance: none;
    line-height: 1; transition: background-color 0.15s;
}
#sd-app .sd-btn-download:hover  { background-color: #3730a3; }
#sd-app .sd-btn-download:active { background-color: #312e81; }
#sd-app .sd-btn-download:focus  { outline: 2px solid #4338ca; outline-offset: 3px; }
#sd-app .sd-btn-download.sd-busy { background-color: #64748b; cursor: wait; pointer-events: none; }

/* ── Footer ── */
#sd-app .sd-footer {
    display: block;
    font-family: ui-monospace, "Courier New", Courier, monospace;
    font-size: 0.65rem; color: #4a5568; text-align: center;
    padding: 0.9rem 0 0 0; margin: 0; border-top: 1px solid #d6d0c4; background: none;
}