:root {
  --teal: #00758f;
  --teal-dark: #005a6e;
  --orange: #e48e00;
  --bg: #f4f7f8;
  --panel: #ffffff;
  --text: #22313a;
  --muted: #6b7780;
  --border: #d9e3e6;
  --good: #2f8f46;
  --ok: #c98700;
  --bad: #c74343;
  --shadow: 0 12px 28px rgba(0, 49, 61, 0.08);
}

* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; background: var(--bg); color: var(--text); line-height: 1.45; }
a { color: var(--teal); }
.header { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 16px 24px; background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.header__brand { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.header__title { margin: 0; color: var(--teal-dark); font-size: 28px; letter-spacing: -0.02em; }
.header__tagline { color: var(--muted); font-weight: 600; }
.header__tools { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.header__nav { display: flex; gap: 8px; align-items: center; }
.nav-link { text-decoration: none; color: var(--teal-dark); font-weight: 700; padding: 8px 10px; border-radius: 999px; }
.nav-link:hover { background: #eaf6f8; }
select, input[type="text"], input[type="password"] { width: 100%; border: 1px solid var(--border); border-radius: 10px; padding: 9px 10px; background: #fff; color: var(--text); font: inherit; }
input[type="range"] { width: 100%; accent-color: var(--teal); }
.layout { display: grid; grid-template-columns: minmax(290px, 360px) 1fr; gap: 18px; padding: 18px; max-width: 1500px; margin: 0 auto; }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 18px; box-shadow: var(--shadow); }
.panel--inputs { padding: 14px; align-self: start; position: sticky; top: 84px; max-height: calc(100vh - 100px); overflow: auto; }
.panel--results { padding: 16px; display: grid; gap: 14px; }
.param-group { border: 1px solid var(--border); border-radius: 14px; margin-bottom: 12px; overflow: hidden; background: #fbfdfd; }
.param-group__header { cursor: pointer; padding: 12px 14px; font-weight: 800; color: var(--teal-dark); }
.param-group__body { padding: 12px 14px 14px; display: grid; gap: 12px; border-top: 1px solid var(--border); }
.param-field label { display: block; font-weight: 700; margin-bottom: 6px; font-size: 13px; color: #35464f; }
.slider-row { display: grid; grid-template-columns: 1fr 68px; gap: 10px; align-items: center; }
.slider-value { text-align: right; color: var(--teal-dark); font-weight: 800; font-size: 13px; }
.fiber-sum-indicator { display: grid; grid-template-columns: auto auto 1fr; gap: 8px; align-items: center; font-size: 13px; color: var(--muted); }
.fiber-sum-number { font-weight: 800; color: var(--good); }
.fiber-sum-number.is-invalid { color: var(--bad); }
.fiber-sum-bar { height: 8px; border-radius: 999px; background: #e7eef1; overflow: hidden; }
.fiber-sum-bar__fill { height: 100%; background: var(--good); border-radius: 999px; }
.fiber-sum-bar__fill.is-invalid { background: var(--bad); }
.warning-banner { background: #fff1f1; border: 1px solid #f0bbbb; color: #8a2d2d; padding: 8px 10px; border-radius: 10px; font-size: 13px; }
.btn { border: 0; border-radius: 12px; padding: 11px 14px; font-weight: 800; cursor: pointer; transition: transform .12s ease, opacity .12s ease, background .12s ease; }
.btn:hover { transform: translateY(-1px); }
.btn:disabled { opacity: .6; cursor: not-allowed; transform: none; }
.btn--primary { background: var(--teal); color: #fff; }
.btn--secondary { background: #e7f3f6; color: var(--teal-dark); border: 1px solid #c6e2e8; }
.btn--reset { background: #eef1f2; color: #4f5b62; }
.btn--small { padding: 8px 11px; font-size: 13px; }
.btn--reset:not(.btn--small) { width: 100%; }
.exec-summary { display: grid; grid-template-columns: repeat(4, minmax(140px, 1fr)); gap: 10px; }
.summary-item { background: linear-gradient(180deg, #ffffff, #f7fbfc); border: 1px solid var(--border); border-radius: 16px; padding: 12px; }
.summary-label { display: block; color: var(--muted); font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .04em; margin-bottom: 4px; }
.summary-value { font-weight: 800; color: var(--text); }
.summary-value--large { font-size: 30px; color: var(--teal-dark); }
.summary-pill, .pilling-label { display: inline-flex; align-items: center; border-radius: 999px; padding: 5px 10px; font-size: 13px; font-weight: 800; }
.status--good { background: #e8f7ed; color: var(--good); }
.status--ok { background: #fff4d9; color: var(--ok); }
.status--bad { background: #fdecec; color: var(--bad); }
.action-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.result-card { background: #fff; border: 1px solid var(--border); border-radius: 18px; overflow: hidden; box-shadow: 0 4px 16px rgba(0,0,0,.035); }
.result-card__header { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 13px 16px; background: #f8fbfc; border-bottom: 1px solid var(--border); }
.result-card__header h2 { margin: 0; color: var(--teal-dark); font-size: 18px; }
.card-kicker { color: var(--muted); font-size: 12px; font-weight: 700; }
.result-card__body { padding: 16px; }
.result-card__body--pilling { display: flex; align-items: center; gap: 18px; }
.pilling-circle { width: 116px; height: 116px; border-radius: 50%; display: grid; place-items: center; color: #fff; box-shadow: inset 0 -10px 18px rgba(0,0,0,.12); }
.pilling-circle--good { background: var(--good); }
.pilling-circle--ok { background: var(--ok); }
.pilling-circle--bad { background: var(--bad); }
.pilling-circle__number { font-size: 54px; font-weight: 900; }
.pulse { animation: pulse .3s ease; }
@keyframes pulse { 50% { transform: scale(1.05); } }
.pilling-meta { display: grid; gap: 12px; min-width: 240px; }
.confidence-wrapper { display: grid; grid-template-columns: 1fr 54px; gap: 6px; align-items: center; }
.confidence-text { grid-column: 1 / -1; font-size: 12px; color: var(--muted); font-weight: 800; text-transform: uppercase; }
.confidence-bar { height: 10px; border-radius: 999px; background: #e7eef1; overflow: hidden; }
.confidence-bar__fill { height: 100%; background: var(--teal); border-radius: 999px; }
.confidence-value { font-weight: 800; color: var(--teal-dark); }
.metrics-grid { display: grid; grid-template-columns: repeat(4, minmax(120px, 1fr)); gap: 10px; }
.metric-card { border: 1px solid var(--border); border-radius: 16px; padding: 12px; background: #fff; display: flex; gap: 10px; align-items: center; }
.metric-card__icon { font-size: 22px; }
.metric-card__label { display: block; color: var(--muted); font-size: 12px; font-weight: 800; text-transform: uppercase; }
.metric-card__value { font-weight: 900; }
.metric--good { border-color: #bfe5ca; background: #f2fbf5; }
.metric--ok { border-color: #f1dca8; background: #fffaf0; }
.metric--bad { border-color: #efc1c1; background: #fff5f5; }
.comparison-table { width: 100%; border-collapse: collapse; }
.comparison-table th, .comparison-table td { border-bottom: 1px solid var(--border); padding: 8px; text-align: left; }
.comparison-table th { color: var(--teal-dark); }
.muted-note { color: var(--muted); font-size: 13px; margin: 4px 0 0; }
.scope-warning-list, .recommendation-list { margin: 0; padding-left: 22px; }
.scope-warning-list li, .recommendation-list li { margin: 6px 0; }
.result-card__body--chart { height: 275px; }
.result-card__body--chart canvas { width: 100%; height: 100%; display: block; }
.model-panels { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.info-panel { background: #f8fbfc; border: 1px solid var(--border); border-radius: 14px; padding: 14px; }
.info-panel h3 { margin-top: 0; color: var(--teal-dark); }
.demo-card { border-color: #cfe6ec; }
.presentation-card { background: linear-gradient(180deg, #ffffff 0%, #f4fafc 100%); border-left: 4px solid var(--teal); }
.demo-guide { display: grid; gap: 12px; }
.demo-steps { display: grid; grid-template-columns: repeat(4, minmax(130px, 1fr)); gap: 8px; }
.demo-step { border: 1px solid var(--border); background: #f8fbfc; color: var(--teal-dark); border-radius: 14px; padding: 10px; text-align: left; font-weight: 800; cursor: pointer; }
.demo-step span { display: block; color: var(--orange); font-size: 12px; margin-bottom: 2px; letter-spacing: .06em; }
.demo-step:hover, .demo-step.is-active { border-color: var(--teal); background: #eaf6f8; }
.demo-guidance { background: #f7fbfc; border: 1px solid var(--border); border-radius: 14px; padding: 12px; color: #34464f; }
.presentation-cue-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; }
.pitch-note { background: #fffaf0; border: 1px solid #f2dfa2; border-radius: 12px; padding: 10px 12px; }
.pitch-note strong { display: block; color: var(--orange); font-size: 12px; text-transform: uppercase; letter-spacing: .05em; margin-bottom: 4px; }
.pitch-note p { margin: 0; font-size: 13px; color: #34464f; }
.walkthrough-countdown { background: var(--teal); color: #fff; border-radius: 999px; padding: 4px 12px; font-size: 12px; font-weight: 800; letter-spacing: .03em; }
@media (max-width: 700px) { .presentation-cue-grid { grid-template-columns: 1fr; } }
.ai-card { border-color: #cfe6ec; }
.ai-assistant { display: grid; gap: 12px; }
.ai-mode-group { border: 1px solid var(--border); border-radius: 14px; padding: 12px; display: flex; flex-wrap: wrap; gap: 12px 16px; background: #fbfdfd; }
.ai-mode-group legend { color: var(--teal-dark); font-weight: 800; padding: 0 6px; }
.ai-mode-group label { display: inline-flex; align-items: center; gap: 6px; font-weight: 700; color: #35464f; }
.ai-settings-grid { display: grid; grid-template-columns: 1.4fr .8fr; gap: 12px; }
.ai-action-row { align-items: stretch; }
.ai-status { padding: 10px 12px; border-radius: 12px; background: #f7fbfc; border: 1px solid var(--border); color: var(--muted); font-size: 13px; }
.ai-status.is-error { background: #fff1f1; color: #8a2d2d; border-color: #f0bbbb; }
.ai-status.is-busy { background: #fff8e8; color: #8a5a00; border-color: #f2d9a2; }
.ai-output { border: 1px solid var(--border); border-radius: 14px; padding: 14px; background: #fbfdfd; min-height: 76px; white-space: normal; }
.ai-output:empty { display: none; }
.ai-output h3, .ai-output h4 { color: var(--teal-dark); margin: 14px 0 6px; }
.ai-bullet { margin: 4px 0 4px 12px; }
.ai-prompt-panel { border: 1px solid var(--border); border-radius: 14px; background: #fbfdfd; overflow: hidden; }
.ai-prompt-panel summary { cursor: pointer; padding: 10px 12px; color: var(--teal-dark); font-weight: 800; }
#ai-prompt-preview { display: block; width: 100%; min-height: 220px; border: 0; border-top: 1px solid var(--border); padding: 12px; font: 12px/1.45 Consolas, Monaco, monospace; color: #2d3a40; background: #fff; resize: vertical; }
.footer { padding: 18px 24px; color: var(--muted); text-align: center; font-size: 13px; }
.content-page { max-width: 980px; margin: 22px auto; padding: 0 18px; display: grid; gap: 14px; }
.content-card { background: #fff; border: 1px solid var(--border); border-radius: 18px; padding: 20px; box-shadow: var(--shadow); }
.content-card h2 { color: var(--teal-dark); margin-top: 0; }
.content-card h3 { color: var(--teal-dark); }
.content-card table { width: 100%; border-collapse: collapse; }
.content-card th, .content-card td { border: 1px solid var(--border); padding: 8px; text-align: left; }
.content-card th { background: #f8fbfc; }
code { background: #eef5f7; padding: 2px 5px; border-radius: 5px; }
@media (max-width: 1050px) {
  .layout { grid-template-columns: 1fr; }
  .panel--inputs { position: static; max-height: none; }
  .exec-summary, .metrics-grid, .demo-steps { grid-template-columns: repeat(2, minmax(140px, 1fr)); }
}
@media (max-width: 700px) {
  .header { position: static; align-items: flex-start; }
  .header, .header__tools { flex-direction: column; }
  .layout { padding: 10px; }
  .exec-summary, .metrics-grid, .model-panels, .ai-settings-grid, .demo-steps { grid-template-columns: 1fr; }
  .result-card__body--pilling { flex-direction: column; align-items: flex-start; }
  .pilling-meta { min-width: 100%; }
}
.callout { background: #fff8e8; border-left: 4px solid var(--orange); padding: 12px 14px; border-radius: 10px; margin: 12px 0; }
.disclaimer { border-color: #f0c6c6; }