:root {
  --ink: #151814;
  --paper: #f4f1e8;
  --lime: #d8ff43;
  --orange: #ff5a36;
  --line: rgba(21, 24, 20, 0.24);
  --muted: #555950;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
  color: var(--ink);
  font-family: "Manrope", sans-serif;
}

button, input { font: inherit; }
button { color: inherit; }

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .16;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.95' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.14'/%3E%3C/svg%3E");
  z-index: 10;
}

.site-header, main, footer { max-width: 1240px; margin-inline: auto; }
.site-header { height: 84px; padding: 0 28px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { display: flex; gap: 12px; align-items: center; color: inherit; text-decoration: none; font-weight: 800; letter-spacing: -.04em; font-size: 20px; }
.brand em { color: var(--muted); font-style: normal; font-weight: 500; }
.brand-mark { width: 36px; height: 36px; display: grid; place-items: center; background: var(--ink); color: var(--lime); border-radius: 50%; font-style: italic; }
.header-actions { display: flex; align-items: center; gap: 20px; }
.text-button { padding: 7px 11px; border: 1px solid var(--line); border-radius: 20px; background: transparent; cursor: pointer; font: 500 10px "DM Mono", monospace; text-transform: uppercase; }
.status { font-family: "DM Mono", monospace; font-size: 11px; text-transform: uppercase; letter-spacing: .08em; }
.status span { display: inline-block; width: 7px; height: 7px; margin-right: 7px; border-radius: 50%; background: #3ac260; box-shadow: 0 0 0 4px rgba(58,194,96,.14); }

main { padding: 0 28px 80px; }
.tabs { display: flex; gap: 30px; border-bottom: 1px solid var(--line); }
.tab { position: relative; border: 0; padding: 20px 0 16px; background: none; color: var(--muted); cursor: pointer; font-size: 13px; font-weight: 700; }
.tab.active { color: var(--ink); }
.tab.active::after { content: ""; position: absolute; height: 3px; background: var(--orange); left: 0; right: 0; bottom: -1px; }
.tab span { padding: 2px 6px; margin-left: 4px; border-radius: 10px; background: var(--ink); color: white; font: 10px "DM Mono", monospace; }
.view { display: none; }
.view.active { display: block; animation: reveal .35s ease both; }
@keyframes reveal { from { opacity: 0; transform: translateY(8px); } }

.hero { display: grid; grid-template-columns: 1.5fr .7fr; gap: 60px; align-items: end; padding: 70px 0 55px; }
.eyebrow { margin: 0 0 12px; color: var(--orange); font: 500 12px "DM Mono", monospace; letter-spacing: .12em; }
h1 { margin: 0; max-width: 800px; font-size: clamp(52px, 8vw, 106px); line-height: .88; letter-spacing: -.075em; }
.hero-copy, .section-title > p { max-width: 390px; margin: 0 0 6px; color: var(--muted); font-size: 17px; line-height: 1.6; }

.planner-grid { display: grid; grid-template-columns: 1fr .86fr; gap: 18px; align-items: start; }
.card, .result-card { border: 1px solid var(--line); border-radius: 3px; background: rgba(255,255,255,.32); }
.planner-card { padding: 32px; }
.card-heading { display: flex; align-items: flex-start; gap: 15px; margin-bottom: 32px; }
.card-heading > span { display: grid; width: 33px; height: 33px; place-items: center; flex: 0 0 auto; border: 1px solid var(--ink); border-radius: 50%; font: 11px "DM Mono", monospace; }
h2 { margin: 0 0 4px; font-size: 21px; letter-spacing: -.035em; }
.card-heading p { margin: 0; color: var(--muted); font-size: 13px; }
fieldset { min-width: 0; padding: 0; margin: 0 0 30px; border: 0; }
legend, .field { color: var(--muted); font: 500 11px "DM Mono", monospace; letter-spacing: .08em; text-transform: uppercase; }
legend { margin-bottom: 12px; }
.distance-options { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.distance-options input { position: absolute; opacity: 0; }
.distance-options span { display: grid; height: 50px; place-items: center; border: 1px solid var(--line); border-radius: 2px; color: var(--ink); cursor: pointer; font-weight: 700; }
.distance-options input:checked + span { border-color: var(--ink); background: var(--ink); color: var(--lime); }
.time-inputs { display: flex; align-items: center; gap: 8px; }
.time-inputs label { position: relative; min-width: 0; flex: 1; }
.time-inputs input { width: 100%; border: 0; border-bottom: 2px solid var(--ink); background: transparent; color: var(--ink); font: 500 clamp(36px, 5vw, 58px) "DM Mono", monospace; text-align: center; outline: none; }
.time-inputs span { display: block; margin-top: 5px; color: var(--muted); font: 10px "DM Mono", monospace; text-align: center; }
.time-inputs b { margin-top: -22px; font: 40px "DM Mono", monospace; }
.field { display: block; margin-top: 20px; }
.field input { display: block; width: 100%; margin-top: 8px; padding: 13px 0; border: 0; border-bottom: 1px solid var(--ink); border-radius: 0; outline: none; background: transparent; color: var(--ink); font-size: 16px; text-transform: none; }
.hidden { display: none; }

.result-card { overflow: hidden; background: var(--ink); color: white; }
.result-top { display: flex; justify-content: space-between; padding: 24px 28px 0; color: #b4b7b0; font: 11px "DM Mono", monospace; letter-spacing: .08em; }
.pace-number { display: flex; align-items: flex-end; padding: 8px 28px 20px; color: var(--lime); }
.pace-number strong { font: 500 clamp(80px, 11vw, 132px)/1 "DM Mono", monospace; letter-spacing: -.1em; }
.pace-number span { padding: 0 0 14px 9px; font: 13px "DM Mono", monospace; }
.metric-row { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid #3a3e38; border-bottom: 1px solid #3a3e38; }
.metric-row div { padding: 18px 28px; }
.metric-row div + div { border-left: 1px solid #3a3e38; }
.metric-row span, .metric-row strong { display: block; }
.metric-row span { margin-bottom: 5px; color: #8f938b; font: 10px "DM Mono", monospace; text-transform: uppercase; }
.metric-row strong { font: 500 17px "DM Mono", monospace; }
.splits-heading, .splits li { display: flex; justify-content: space-between; }
.splits-heading { padding: 22px 28px 10px; color: #8f938b; font: 10px "DM Mono", monospace; text-transform: uppercase; }
.splits { max-height: 190px; overflow: auto; margin: 0; padding: 0 28px; list-style: none; }
.splits li { padding: 10px 0; border-bottom: 1px solid #2e312d; font: 13px "DM Mono", monospace; }
.splits li span:first-child { color: #aeb2aa; }
.primary-button { display: flex; width: calc(100% - 56px); justify-content: space-between; margin: 24px 28px 12px; padding: 17px 18px; border: 0; border-radius: 2px; background: var(--lime); color: var(--ink); cursor: pointer; font-weight: 800; }
.primary-button:hover { background: #e4ff79; }
.submission-note { margin: 0 28px 10px; color: #aeb2aa; font-size: 10px; line-height: 1.5; text-align: center; }
.result-link { display: block; margin: 0 auto 8px; padding: 5px; border: 0; border-bottom: 1px solid #666b63; background: transparent; color: #c5c9c0; cursor: pointer; font: 11px "DM Mono", monospace; }
.form-message { min-height: 20px; margin: 0 28px 18px; color: var(--lime); font-size: 12px; }

.section-title { display: flex; align-items: end; justify-content: space-between; gap: 40px; padding: 58px 0 38px; }
.section-title h1 { font-size: clamp(50px, 7vw, 88px); }
.session-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 16px; }
.session-toolbar p { margin: 0; color: var(--muted); font: 12px "DM Mono", monospace; }
.session-toolbar > div { display: flex; flex-wrap: wrap; gap: 7px; }
.outline-button { display: inline-flex; align-items: center; min-height: 36px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 2px; background: rgba(255,255,255,.28); cursor: pointer; font-size: 11px; font-weight: 700; }
.file-button input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.session-list { display: grid; gap: 10px; }
.session-item { display: grid; grid-template-columns: 1.25fr repeat(3, .65fr) 1.6fr; align-items: center; gap: 18px; padding: 22px 25px; border: 1px solid var(--line); background: rgba(255,255,255,.28); }
.session-item.is-complete { border-left: 4px solid var(--lime); }
.session-item h3 { margin: 0 0 3px; font-size: 17px; }
.session-item p, .session-item span, .session-item small { margin: 0; color: var(--muted); font-size: 11px; }
.session-item strong { display: block; font: 500 17px "DM Mono", monospace; }
.session-item small { display: block; margin-top: 3px; }
.session-identity > div { min-height: 23px; }
.session-identity .status-chip { display: inline-block; margin: 0 7px 7px 0; padding: 3px 7px; border-radius: 20px; background: rgba(21,24,20,.08); color: var(--muted); font: 9px "DM Mono", monospace; text-transform: uppercase; }
.session-identity .status-chip.completed { background: var(--lime); color: var(--ink); }
.session-identity .result-delta { display: inline; font: 9px "DM Mono", monospace; }
.result-delta.ahead { color: #327943; }
.result-delta.behind { color: #b53b22; }
.session-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 5px; }
.session-actions button { padding: 6px 8px; border: 1px solid var(--line); border-radius: 2px; background: transparent; cursor: pointer; font-size: 10px; }
.session-actions button:first-child { border-color: var(--ink); background: var(--ink); color: var(--lime); }
.session-actions button.danger { color: #b53b22; }
.empty-state { padding: 70px; border: 1px dashed var(--line); color: var(--muted); text-align: center; }
.empty-state.compact { margin: 0; padding: 35px 15px; font-size: 12px; }

.insight-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.insight-card { min-height: 220px; padding: 25px; display: flex; flex-direction: column; border: 1px solid var(--line); }
.insight-card span, .insight-card small { font: 11px "DM Mono", monospace; text-transform: uppercase; letter-spacing: .06em; }
.insight-card strong { margin: auto 0 4px; font-size: clamp(38px, 5vw, 66px); letter-spacing: -.07em; }
.insight-card.lime { background: var(--lime); }
.insight-card.dark { background: var(--ink); color: white; }
.insight-card.orange { background: var(--orange); color: var(--ink); }
.insight-card.paper { background: rgba(255,255,255,.45); }
.insight-details { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
.data-card { padding: 30px; }
.distance-bars { display: grid; gap: 15px; }
.bar-label { display: grid; grid-template-columns: 80px 1fr 30px; align-items: center; gap: 12px; font: 12px "DM Mono", monospace; }
.bar-track { height: 13px; background: rgba(21,24,20,.08); }
.bar-fill { height: 100%; min-width: 2px; background: var(--orange); transition: width .5s ease; }
.pace-history { display: grid; gap: 12px; }
.history-row { display: grid; grid-template-columns: 58px 1fr 44px; align-items: center; gap: 10px; font: 11px "DM Mono", monospace; }
.bar-fill.pace { background: var(--ink); }

dialog { width: min(520px, calc(100% - 30px)); padding: 0; border: 1px solid var(--ink); border-radius: 3px; background: var(--paper); color: var(--ink); box-shadow: 0 25px 80px rgba(0,0,0,.25); }
dialog::backdrop { background: rgba(21,24,20,.7); backdrop-filter: blur(3px); }
#session-editor, #admin-form { padding: 30px; }
.dialog-heading { display: flex; justify-content: space-between; align-items: start; margin-bottom: 25px; }
.dialog-heading .eyebrow { margin-bottom: 7px; }
.icon-button { width: 34px; height: 34px; border: 1px solid var(--line); border-radius: 50%; background: transparent; cursor: pointer; font-size: 20px; }
.dialog-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.optional { float: right; color: var(--muted); font-size: 9px; }
.auth-note { margin: 0 0 25px; color: var(--muted); font-size: 14px; line-height: 1.6; }
.dialog-message { min-height: 18px; margin: 18px 0 0; color: #b53b22; font-size: 12px; }
.primary-button.dialog-save { width: 100%; margin: 10px 0 0; background: var(--ink); color: var(--lime); }
.toast { position: fixed; right: 24px; bottom: 24px; z-index: 30; padding: 13px 17px; border-radius: 2px; background: var(--ink); color: white; opacity: 0; transform: translateY(12px); transition: .2s ease; pointer-events: none; font: 11px "DM Mono", monospace; }
.toast.visible { opacity: 1; transform: translateY(0); }

footer { display: flex; justify-content: space-between; padding: 24px 28px 40px; border-top: 1px solid var(--line); color: var(--muted); font: 10px "DM Mono", monospace; }

@media (max-width: 760px) {
  .site-header, main { padding-inline: 18px; }
  .brand { font-size: 17px; }
  .header-actions { gap: 6px; }
  .status { display: none; }
  .text-button { padding-inline: 8px; font-size: 9px; }
  .hero { grid-template-columns: 1fr; gap: 25px; padding: 45px 0 38px; }
  .planner-grid, .insight-grid, .insight-details { width: 100%; min-width: 0; grid-template-columns: minmax(0, 1fr); }
  .hero > *, .planner-grid > *, .section-title > * { width: 100%; min-width: 0; }
  .distance-options { grid-template-columns: repeat(2, 1fr); }
  .time-inputs { gap: 4px; }
  .time-inputs input { min-width: 0; font-size: 34px; }
  .time-inputs b { font-size: 28px; }
  .planner-card { padding: 24px 18px; }
  .section-title { display: block; }
  .section-title > p { margin-top: 25px; }
  .session-toolbar { align-items: flex-start; flex-direction: column; }
  .session-item { grid-template-columns: 1fr 1fr; }
  .session-item > div:first-child { grid-column: 1 / -1; }
  .session-actions { grid-column: 1 / -1; justify-content: flex-start; padding-top: 8px; border-top: 1px solid var(--line); }
  .dialog-grid { grid-template-columns: 1fr; gap: 0; }
  .pace-number strong { font-size: 72px; }
  footer { margin-inline: 0; }
}