/* ============================================================
   Options Payoff & Greeks Calculator — styles
   Reuses the design tokens from style.css (var(--…)).
   ============================================================ */

.calc-wrap { max-width: 1480px; margin: 0 auto; padding: 26px 8px 100px; }

/* Tool page goes full-width: reclaim the course sidebar + trim content padding on desktop */
.calc-layout { max-width: 1620px; }
body[data-page="calculator"] .content { padding: 20px 30px 90px; }
@media (min-width: 861px) {
  body[data-page="calculator"] .calc-layout { grid-template-columns: minmax(0, 1fr); }
  body[data-page="calculator"] .sidebar { display: none; }
}

.calc-head { margin-bottom: 22px; }
.calc-head h1 { font-size: clamp(26px, 3.4vw, 36px); letter-spacing: -.02em; margin: 0 0 8px; }
.calc-head p { color: var(--text-soft); margin: 0; font-size: 16px; max-width: 720px; }
.calc-head .badges { margin-top: 12px; display: flex; gap: 8px; flex-wrap: wrap; }
.calc-head .badge { font-size: 12px; font-weight: 650; color: var(--text-soft); background: var(--bg-sunken); border: 1px solid var(--border); padding: 5px 11px; border-radius: 99px; }

.calc-grid { display: grid; grid-template-columns: 360px minmax(0, 1fr); gap: 24px; align-items: start; }
@media (max-width: 920px) { .calc-grid { grid-template-columns: 1fr; } }

.panel {
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-sm); padding: 18px;
}
.panel + .panel { margin-top: 18px; }
.panel__title {
  font-size: 12.5px; font-weight: 750; text-transform: uppercase; letter-spacing: .07em;
  color: var(--text-faint); margin: 0 0 14px; display: flex; align-items: center; justify-content: space-between; gap: 8px;
}
.panel__title .hint { font-size: 11px; font-weight: 500; text-transform: none; letter-spacing: 0; color: var(--text-faint); }

/* ---------- Field grid ---------- */
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 12.5px; font-weight: 600; color: var(--text-soft); display: flex; align-items: center; gap: 5px; }
.field .unit { color: var(--text-faint); font-weight: 500; }
.input, select.input {
  font: inherit; font-size: 15px; padding: 9px 11px; border-radius: 9px;
  border: 1px solid var(--border-strong); background: var(--bg); color: var(--text);
  width: 100%; transition: border-color .14s, box-shadow .14s;
  -webkit-appearance: none; appearance: none;
}
.input:focus, select.input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.input.money { font-variant-numeric: tabular-nums; }
select.input {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 4.5L6 7.5L9 4.5' stroke='%238a94a3' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center; padding-right: 28px;
}

details.advanced { margin-top: 12px; border-top: 1px dashed var(--border); padding-top: 10px; }
details.advanced > summary { cursor: pointer; font-size: 13px; color: var(--text-soft); font-weight: 600; list-style: none; }
details.advanced > summary::-webkit-details-marker { display: none; }
details.advanced > summary::before { content: "▸ "; color: var(--text-faint); }
details.advanced[open] > summary::before { content: "▾ "; }
details.advanced .field-grid { margin-top: 12px; }

/* ---------- Presets ---------- */
.presets { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font: inherit; font-size: 13px; font-weight: 600; cursor: pointer;
  padding: 7px 13px; border-radius: 99px; border: 1px solid var(--border-strong);
  background: var(--bg); color: var(--text-soft); transition: all .14s;
}
.chip:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.chip.course { border-color: color-mix(in srgb, var(--bitcoin) 50%, var(--border)); color: var(--bitcoin); background: var(--bitcoin-soft); }
.chip.course:hover { border-color: var(--bitcoin); }

/* Presets are secondary — smaller, sit below the legs */
.presets-panel .chip { font-size: 12px; padding: 5px 10px; }
.presets__sub { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--text-faint); margin: 13px 0 8px; }

/* Manually-set leg price indicator */
.input.edited { border-color: var(--accent); box-shadow: inset 3px 0 0 0 var(--accent); }
#btn-reprice { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, var(--border-strong)); }
#btn-reprice:hover { background: var(--accent-soft); }

/* ---------- Legs (two-row cards, fully legible 6-digit values) ---------- */
.leg-row {
  border: 1px solid var(--border); border-radius: 10px; padding: 10px 11px 11px; margin-bottom: 10px;
  background: var(--bg); display: flex; flex-direction: column; gap: 9px;
}
.leg-row.is-stock { border-color: color-mix(in srgb, var(--accent) 28%, var(--border)); }
.leg-top { display: flex; gap: 8px; align-items: center; }
.leg-top .leg-kind { flex: 1; font-weight: 600; }
.leg-fields { display: grid; grid-template-columns: 1.25fr 0.75fr 1.25fr; gap: 8px; }
.leg-fields .input { padding: 8px 9px; font-size: 14px; }
.lf { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.lf > span { font-size: 10.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--text-faint); }
.leg-del {
  width: 30px; height: 32px; flex: none; border: 1px solid var(--border); background: var(--bg-elev); color: var(--text-faint);
  border-radius: 8px; cursor: pointer; font-size: 16px; line-height: 1; display: grid; place-items: center;
}
.leg-del:hover { border-color: var(--danger); color: var(--danger); background: var(--danger-soft); }
.btn-add {
  font: inherit; font-size: 14px; font-weight: 650; cursor: pointer; margin-top: 6px;
  padding: 9px 14px; border-radius: 9px; border: 1.5px dashed var(--border-strong);
  background: transparent; color: var(--accent); width: 100%; transition: all .14s;
}
.btn-add:hover { border-color: var(--accent); background: var(--accent-soft); }
.legs-empty { color: var(--text-faint); font-size: 14px; text-align: center; padding: 14px 0; }

.calc-actions { display: flex; gap: 10px; margin-top: 14px; }
.btn-sm {
  font: inherit; font-size: 13px; font-weight: 600; cursor: pointer; padding: 8px 14px; border-radius: 8px;
  border: 1px solid var(--border-strong); background: var(--bg); color: var(--text-soft);
}
.btn-sm:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Output: summary stat cards ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 18px; }
.stat {
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 13px 15px; box-shadow: var(--shadow-sm);
}
.stat .k { font-size: 11.5px; font-weight: 650; text-transform: uppercase; letter-spacing: .05em; color: var(--text-faint); margin-bottom: 5px; display: flex; align-items: center; gap: 5px; }
.stat .v { font-size: 21px; font-weight: 750; letter-spacing: -.01em; font-variant-numeric: tabular-nums; line-height: 1.15; }
.stat .v.pos { color: var(--good); }
.stat .v.neg { color: var(--danger); }
.stat .sub { font-size: 12px; color: var(--text-faint); margin-top: 3px; }

/* ---------- Chart ---------- */
.chart-card { position: relative; }
.chart-wrap { position: relative; width: 100%; }
.chart-wrap svg { width: 100%; height: auto; display: block; touch-action: none; }
.chart-legend { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; margin: 4px 2px 14px; font-size: 12.5px; color: var(--text-soft); }
.chart-legend span { display: inline-flex; align-items: center; gap: 7px; }
.lg-line { width: 22px; height: 0; border-top: 3px solid var(--bitcoin); }
.lg-line.dashed { border-top: 3px dashed var(--text-faint); }
.lg-swatch { width: 12px; height: 12px; border-radius: 3px; }
.lg-swatch.pos { background: color-mix(in srgb, var(--good) 35%, transparent); }
.lg-swatch.neg { background: color-mix(in srgb, var(--danger) 35%, transparent); }

.chart-tip {
  position: absolute; pointer-events: none; z-index: 5; opacity: 0; transform: translate(-50%, 0);
  background: var(--text); color: var(--bg-elev); font-size: 12.5px; line-height: 1.5;
  padding: 8px 11px; border-radius: 9px; box-shadow: var(--shadow-md); white-space: nowrap;
  transition: opacity .1s;
}
html[data-theme="dark"] .chart-tip { background: oklch(0.985 0 0); color: oklch(0.145 0 0); }
.chart-tip b { font-weight: 750; }
.chart-tip .tip-row { display: flex; gap: 8px; justify-content: space-between; }
/* tooltip background is inverted relative to the theme, so gain/loss shades flip too */
.chart-tip .tip-pos { color: oklch(0.723 0.219 149.579); }
.chart-tip .tip-neg { color: oklch(0.704 0.191 22.216); }
html[data-theme="dark"] .chart-tip .tip-pos { color: oklch(0.627 0.194 149.214); }
html[data-theme="dark"] .chart-tip .tip-neg { color: oklch(0.577 0.245 27.325); }

/* outlook slider */
.outlook { margin: 14px 2px 2px; }
.outlook__label { display: flex; justify-content: space-between; font-size: 13px; color: var(--text-soft); margin-bottom: 7px; }
.outlook__label b { color: var(--text); font-weight: 700; }
input[type="range"].slider { width: 100%; -webkit-appearance: none; appearance: none; height: 6px; border-radius: 99px; background: var(--bg-sunken); outline: none; }
input[type="range"].slider::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%; background: var(--accent); cursor: pointer; border: 3px solid var(--bg-elev); box-shadow: var(--shadow-sm); }
input[type="range"].slider::-moz-range-thumb { width: 20px; height: 20px; border-radius: 50%; background: var(--accent); cursor: pointer; border: 3px solid var(--bg-elev); }

/* ---------- Greeks ---------- */
.greeks-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.greek {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px 14px;
}
.greek .g-top { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.greek .g-name { font-weight: 700; font-size: 14.5px; }
.greek .g-val { font-size: 18px; font-weight: 750; font-variant-numeric: tabular-nums; }
.greek .g-val.pos { color: var(--good); }
.greek .g-val.neg { color: var(--danger); }
.greek .g-hint { font-size: 12px; color: var(--text-faint); margin-top: 4px; line-height: 1.4; }

.calc-note { font-size: 12.5px; color: var(--text-faint); margin-top: 16px; line-height: 1.6; background: var(--bg-sunken); border-radius: var(--radius-sm); padding: 13px 16px; }

/* ---------- Live (Deribit) panel ---------- */
.live-panel { border-color: color-mix(in srgb, var(--bitcoin) 35%, var(--border)); }
.btn-live {
  font: inherit; font-size: 14.5px; font-weight: 700; cursor: pointer; width: 100%;
  padding: 11px 14px; border-radius: 10px; border: none; color: var(--bitcoin-contrast);
  background: var(--bitcoin); box-shadow: var(--shadow-sm);
  transition: transform .12s, box-shadow .15s;
}
.btn-live:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-live:disabled { opacity: .6; cursor: default; transform: none; }
.live-status { font-size: 12.5px; color: var(--text-faint); margin-top: 10px; line-height: 1.5; }
.live-status.ok { color: var(--good); font-weight: 600; }
.live-status.err { color: var(--danger); }
.live-foot { font-size: 11.5px; color: var(--text-faint); margin-top: 8px; line-height: 1.45; }

.live-chain { max-height: 300px; overflow-y: auto; margin-top: 10px; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.chain-cap { font-size: 11px; color: var(--text-faint); padding: 6px 9px 5px; }
table.chain { width: 100%; border-collapse: collapse; font-size: 13px; font-variant-numeric: tabular-nums; }
table.chain thead th {
  position: sticky; top: 0; background: var(--bg-sunken); color: var(--text-faint);
  font-size: 10.5px; text-transform: uppercase; letter-spacing: .04em; font-weight: 700; padding: 7px 8px; z-index: 1;
}
table.chain td { padding: 3px 6px; text-align: center; border-top: 1px solid var(--border); }
table.chain td.k { font-weight: 700; color: var(--text-soft); background: var(--bg-sunken); }
table.chain tr.atm td.k { color: var(--accent-strong); background: var(--accent-soft); }
table.chain tr.atm td { border-top-color: color-mix(in srgb, var(--accent) 30%, var(--border)); }
table.chain td.cbtn, table.chain td.pbtn { width: 38%; color: var(--text-faint); }
table.chain button {
  font: inherit; font-size: 12.5px; font-weight: 600; cursor: pointer; width: 100%;
  padding: 5px 6px; border-radius: 6px; border: 1px solid transparent; background: transparent; transition: all .12s;
}
table.chain td.cbtn button { color: var(--good); }
table.chain td.pbtn button { color: var(--danger); }
table.chain td.cbtn button:hover { background: var(--good-soft); border-color: color-mix(in srgb, var(--good) 40%, transparent); }
table.chain td.pbtn button:hover { background: var(--danger-soft); border-color: color-mix(in srgb, var(--danger) 40%, transparent); }

@media (max-width: 420px) {
  .leg-fields { grid-template-columns: 1fr 1fr; }
  .lf:last-child { grid-column: 1 / -1; }
}