/* Algorithm-playground page (calc.html) styles.
 * Inherits design tokens (--bg, --accent, etc.) from style.css and
 * marketing.css; this file only adds the calculator-specific layout.
 */

body.calc-page {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    margin: 0;
    min-height: 100vh;
}

/* ── Header ───────────────────────────────────────────────────── */
.calc-header {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 56px 22px 28px;
}
.calc-header h1 {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    line-height: 1.1;
    color: var(--text-strong);
    font-weight: 400;
    margin: 12px 0 16px;
    letter-spacing: -0.02em;
}
.calc-header .hint {
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.6;
    max-width: 64ch;
    margin: 0 0 12px;
}
.calc-header .calc-protect-note {
    padding: 10px 14px;
    border-left: 3px solid var(--accent);
    background: var(--accent-soft);
    border-radius: 4px;
    font-size: 0.85rem;
    color: var(--text);
}

/* ── Two-column layout ────────────────────────────────────────── */
.calc-main {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 22px 64px;
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 28px;
    align-items: start;
}
@media (max-width: 900px) {
    .calc-main { grid-template-columns: 1fr; }
}

/* ── Sidebar (inputs) ─────────────────────────────────────────── */
.calc-side {
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: sticky;
    top: 16px;
    max-height: calc(100vh - 32px);
    overflow-y: auto;
    padding-right: 4px;
}
@media (max-width: 900px) {
    .calc-side {
        position: static;
        max-height: none;
        overflow-y: visible;
    }
}
.calc-side::-webkit-scrollbar {
    width: 8px;
}
.calc-side::-webkit-scrollbar-track {
    background: transparent;
}
.calc-side::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.calc-block {
    background: var(--bg-card);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 16px 16px 12px;
}
.calc-block h3 {
    margin: 0 0 12px;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    font-weight: 600;
}

.calc-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 12px;
}
.calc-row:last-child { margin-bottom: 0; }
.calc-row > label {
    font-size: 0.78rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 500;
}

.calc-row input[type="number"],
.calc-row select {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-strong);
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.92rem;
    transition: border-color 120ms var(--ease);
}
.calc-row input[type="number"]:focus,
.calc-row select:focus {
    outline: none;
    border-color: var(--accent);
}
.calc-row input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    margin-top: 4px;
}
.calc-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    transition: transform 100ms var(--ease);
}
.calc-row input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }
.calc-row input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    cursor: pointer;
}

.calc-radio {
    display: flex;
    gap: 14px;
    align-items: center;
}
.calc-radio label {
    color: var(--text);
    font-size: 0.9rem;
    text-transform: none;
    letter-spacing: 0;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.calc-radio input[type="radio"] {
    accent-color: var(--accent);
}

.calc-check {
    flex-direction: row !important;
    align-items: center;
    gap: 8px !important;
    font-size: 0.9rem !important;
    text-transform: none !important;
    letter-spacing: 0 !important;
    color: var(--text) !important;
    cursor: pointer;
}
.calc-check input[type="checkbox"] { accent-color: var(--accent); }

.btn-block {
    width: 100%;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    background: var(--bg-elevated);
    color: var(--text-strong);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 120ms var(--ease);
}
.btn-block:hover {
    background: var(--bg-card-hi);
    border-color: var(--accent-line);
    color: var(--accent);
}

/* ── Output panel ─────────────────────────────────────────────── */
.calc-output {
    display: flex;
    flex-direction: column;
    gap: 24px;
    min-width: 0; /* prevent overflow with charts */
}

.calc-summary {
    background: var(--bg-card);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    padding: 24px;
}
.calc-summary-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 20px;
}
.calc-summary h2 {
    margin: 0;
    font-family: var(--font-serif);
    font-weight: 400;
    color: var(--text-strong);
    font-size: 1.4rem;
}
.calc-status {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--muted);
}
.calc-status.calc-status-error { color: var(--danger); }
.calc-status.calc-status-busy  { color: var(--accent); }

.calc-summary-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px 22px;
}
@media (max-width: 700px) {
    .calc-summary-grid { grid-template-columns: repeat(2, 1fr); }
}
.calc-summary-grid > div {
    display: flex;
    flex-direction: column;
    gap: 4px;
    border-left: 2px solid var(--accent-line);
    padding-left: 10px;
}
.calc-summary-grid span {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--muted);
}
.calc-summary-grid strong {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--text-strong);
    font-weight: 500;
}

.calc-effects {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border-soft);
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 22px;
}
@media (max-width: 700px) {
    .calc-effects { grid-template-columns: 1fr; }
}
.calc-effect-label {
    display: block;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--muted);
    margin-bottom: 4px;
}
.calc-effects strong {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text-strong);
    font-weight: 500;
    margin-right: 12px;
}

/* ── Charts ───────────────────────────────────────────────────── */
.calc-charts {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}
@media (max-width: 700px) {
    .calc-charts { grid-template-columns: 1fr; }
}
.calc-chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 18px 20px 12px;
    min-width: 0;
}
.calc-chart-card h3 {
    margin: 0 0 8px;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent);
    font-weight: 600;
}
.calc-chart-card canvas {
    width: 100% !important;
    height: 180px !important;
}

/* ── Trajectory table ─────────────────────────────────────────── */
.calc-table-wrap {
    background: var(--bg-card);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 18px 20px;
}
.calc-table-wrap h3 {
    margin: 0 0 12px;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent);
    font-weight: 600;
}
.calc-table-scroll {
    overflow-x: auto;
    max-height: 420px;
    overflow-y: auto;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-sm);
}
#data-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-mono);
    font-size: 0.82rem;
}
#data-table thead th {
    position: sticky;
    top: 0;
    background: var(--bg-elevated);
    color: var(--accent);
    font-weight: 600;
    text-align: right;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    font-size: 0.74rem;
    letter-spacing: 0.04em;
    z-index: 1;
}
#data-table tbody td {
    padding: 7px 12px;
    text-align: right;
    color: var(--text);
    border-bottom: 1px solid var(--border-soft);
}
#data-table tbody tr:hover td { background: var(--bg-card-hi); }
#data-table tbody td:first-child { color: var(--text-strong); font-weight: 500; }

/* ── Footer ───────────────────────────────────────────────────── */
.calc-footer {
    border-top: 1px solid var(--divider);
    padding: 32px 22px;
    text-align: center;
    color: var(--muted);
    font-size: 0.9rem;
}
.calc-footer a {
    color: var(--accent);
    text-decoration: none;
}
.calc-footer a:hover { text-decoration: underline; }