/* Kereitsu — mastermind circle scheduler */

:root {
  --bg: #05050c;
  --bg-alt: #090913;
  --panel: #0f1020;
  --panel-2: #14152a;
  --line: #232444;
  --line-soft: #1b1c33;
  --text: #e9ecf8;
  --muted: #9aa0be;
  --accent: #38bdf8;
  --accent-deep: #0ea5e9;
  --accent-warm: #fbbf24;
  --danger: #fb7185;
  --radius: 14px;
  --radius-sm: 9px;
  --maxw: 1080px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Inter, Roboto, Helvetica, Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

/* Author display rules outrank the UA's [hidden] rule, so state it louder. */
[hidden] { display: none !important; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

a { color: var(--accent); }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: #04121c; padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

/* ---------- top bar ---------- */

.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(5, 5, 12, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; height: 64px;
}
.brand {
  font-weight: 800; font-size: 1.1rem; letter-spacing: -0.02em;
  color: var(--text); text-decoration: none; white-space: nowrap;
}
.brand-mark { filter: grayscale(0.15); }
.topnav { display: flex; gap: 22px; overflow-x: auto; scrollbar-width: none; }
.topnav::-webkit-scrollbar { display: none; }
.topnav a {
  color: var(--muted); text-decoration: none; font-size: 0.88rem; white-space: nowrap;
  padding: 4px 0; border-bottom: 1px solid transparent; transition: color .15s, border-color .15s;
}
.topnav a:hover { color: var(--text); border-bottom-color: var(--accent); }

@media (max-width: 720px) {
  html { scroll-padding-top: 104px; }
  .topbar-inner { height: auto; flex-direction: column; align-items: flex-start; padding-top: 12px; padding-bottom: 10px; gap: 8px; }
  .topnav { width: 100%; gap: 16px; }
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  padding: clamp(64px, 12vw, 128px) 0 clamp(56px, 9vw, 104px);
  background:
    radial-gradient(900px 420px at 15% -10%, rgba(56, 189, 248, 0.16), transparent 65%),
    radial-gradient(700px 380px at 95% 0%, rgba(167, 139, 250, 0.12), transparent 60%),
    linear-gradient(160deg, #05050c 0%, #0b0b18 100%);
  border-bottom: 1px solid var(--line-soft);
}
.eyebrow {
  text-transform: uppercase; letter-spacing: 0.18em; font-size: 0.74rem;
  color: var(--accent); font-weight: 700; margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(2.1rem, 6vw, 3.9rem);
  line-height: 1.05; letter-spacing: -0.035em; font-weight: 800;
  margin-bottom: 22px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(100deg, var(--accent), #a78bfa);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede { font-size: clamp(1rem, 2.1vw, 1.18rem); color: var(--muted); max-width: 62ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 32px 0 40px; }
.hero-facts {
  list-style: none; display: grid; gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  border-top: 1px solid var(--line-soft); padding-top: 24px;
}
.hero-facts li { color: var(--muted); font-size: 0.92rem; }
.hero-facts strong { color: var(--text); display: block; font-size: 0.95rem; }

/* ---------- buttons ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: 999px; border: 1px solid transparent;
  font-size: 0.94rem; font-weight: 650; font-family: inherit;
  text-decoration: none; cursor: pointer; transition: transform .12s, background .15s, border-color .15s, opacity .15s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #041520; }
.btn-primary:hover { background: #7dd3fc; }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: 0.4; cursor: not-allowed; pointer-events: none; }

.linklike {
  background: none; border: none; color: var(--accent); font: inherit;
  cursor: pointer; text-decoration: underline; padding: 0;
}

/* ---------- sections ---------- */

.section { padding: clamp(56px, 9vw, 96px) 0; border-bottom: 1px solid var(--line-soft); }
.section-alt { background: var(--bg-alt); }
.section-tag {
  text-transform: uppercase; letter-spacing: 0.16em; font-size: 0.72rem;
  color: var(--accent); font-weight: 700; margin-bottom: 12px;
}
.section h2 {
  font-size: clamp(1.6rem, 4vw, 2.4rem); letter-spacing: -0.03em;
  font-weight: 800; line-height: 1.15; margin-bottom: 16px;
}
.section-lede { color: var(--muted); max-width: 62ch; margin-bottom: 28px; }

.two-col {
  display: grid; gap: 32px; align-items: start; margin: 28px 0 40px;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
}
@media (max-width: 860px) { .two-col { grid-template-columns: 1fr; } }

.prose p { margin-bottom: 16px; color: #c6cbe4; }
.prose strong { color: var(--text); }

.callout {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 24px;
}
.callout h3 { font-size: 1.05rem; margin-bottom: 16px; letter-spacing: -0.01em; }
.principles dt { font-weight: 700; color: var(--accent); font-size: 0.9rem; margin-top: 14px; }
.principles dt:first-child { margin-top: 0; }
.principles dd { color: var(--muted); font-size: 0.9rem; }

.card-row {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}
.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px;
}
.card h3 { font-size: 1rem; margin-bottom: 10px; color: var(--text); }
.card p { color: var(--muted); font-size: 0.92rem; }

/* ---------- question lists ---------- */

.qlist { list-style: none; margin-top: 4px; }
.qlist li {
  color: var(--muted); font-size: 0.92rem;
  padding: 8px 0 8px 18px; position: relative;
  border-bottom: 1px solid var(--line-soft);
}
.qlist li:last-child { border-bottom: none; padding-bottom: 0; }
.qlist li::before {
  content: '—'; position: absolute; left: 0; color: var(--accent); opacity: 0.7;
}
.closing-note { margin-top: 20px; max-width: 62ch; }
.closing-note strong { color: var(--text); }

/* ---------- steps ---------- */

.steps {
  list-style: none; display: grid; gap: 16px; margin-top: 28px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  counter-reset: step;
}
.steps li {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px; position: relative;
}
.step-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 50%;
  background: rgba(56, 189, 248, 0.12); color: var(--accent);
  font-weight: 800; font-size: 0.88rem; margin-bottom: 12px;
}
.steps h3 { font-size: 1rem; margin-bottom: 8px; }
.steps p { color: var(--muted); font-size: 0.9rem; }

/* ---------- panels & forms ---------- */

.panel {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: clamp(18px, 3vw, 28px);
  margin-bottom: 20px;
}
.panel h3 { font-size: 1.1rem; letter-spacing: -0.01em; margin-bottom: 8px; }
.muted { color: var(--muted); font-size: 0.92rem; }
.small { font-size: 0.84rem; }

.field-grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.field { display: flex; flex-direction: column; gap: 7px; min-width: 0; }
.field-wide { grid-column: 1 / -1; }
.label { font-size: 0.85rem; font-weight: 650; color: var(--text); }
.label em { font-style: normal; font-weight: 400; color: var(--muted); font-size: 0.8rem; margin-left: 6px; }
.hint { font-size: 0.8rem; color: var(--muted); min-height: 1em; }

input[type="text"], input[type="email"], input[type="date"], select, textarea {
  width: 100%; padding: 11px 13px;
  background: #07080f; color: var(--text);
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-family: inherit; font-size: 0.94rem;
}
textarea { resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); outline: none; }
input::placeholder, textarea::placeholder { color: #5a6086; }
input[readonly] { color: var(--muted); }
select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%); background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%; background-size: 5px 5px, 5px 5px; background-repeat: no-repeat; padding-right: 34px; }

.form-actions { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 22px; }
.form-status { font-size: 0.86rem; color: var(--accent); }
.form-status.error { color: var(--danger); }

/* ---------- availability grid ---------- */

.toolbar {
  display: flex; flex-wrap: wrap; gap: 14px; justify-content: space-between;
  align-items: center; margin-bottom: 18px;
}
.toolbar-group { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.chip {
  background: var(--panel-2); border: 1px solid var(--line); color: var(--muted);
  border-radius: 999px; padding: 7px 14px; font-size: 0.82rem; font-family: inherit;
  cursor: pointer; transition: color .15s, border-color .15s;
}
.chip:hover { color: var(--text); border-color: var(--accent); }
.chip-danger:hover { color: var(--danger); border-color: var(--danger); }
.switch { display: inline-flex; align-items: center; gap: 7px; font-size: 0.82rem; color: var(--muted); cursor: pointer; }
.switch input { accent-color: var(--accent); }

.grid-scroll { overflow-x: auto; padding-bottom: 6px; }
.grid {
  display: grid;
  grid-template-columns: 58px repeat(7, minmax(56px, 1fr));
  column-gap: 3px; row-gap: 1px; min-width: 520px; touch-action: pan-y;
  user-select: none; -webkit-user-select: none;
}
.grid-head {
  font-size: 0.76rem; font-weight: 700; color: var(--muted);
  text-align: center; padding: 6px 0; letter-spacing: 0.04em; text-transform: uppercase;
}
.grid-time {
  font-size: 0.7rem; color: #6b7196; text-align: right;
  padding-right: 8px; line-height: 1; align-self: center;
}
.grid-time.minor { opacity: 0; }
.cell {
  height: 17px; border: none; padding: 0;
  background: #12132a; border-radius: 2px; cursor: pointer;
  touch-action: none; transition: background .08s;
}
.cell.hour-start { box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08); }
.cell:hover { background: #1d1f3d; }
.cell[aria-pressed="true"] { background: var(--accent-deep); }
.cell[aria-pressed="true"]:hover { background: var(--accent); }

.grid-read .cell { cursor: pointer; }
.grid-read .cell.selected-window { outline: 2px solid var(--accent-warm); outline-offset: -2px; }

.toolbar-label { font-size: 0.78rem; color: var(--muted); margin-right: 2px; }
.chip-paint.is-active { color: var(--accent); border-color: var(--accent); background: rgba(56, 189, 248, 0.1); }
.chip-maybe.is-active { color: var(--accent-warm); border-color: var(--accent-warm); background: rgba(251, 191, 36, 0.1); }

/* Three states, kept visually distinct rather than blended into one ramp. */
.cell[data-state="2"] { background: var(--accent-deep); }
.cell[data-state="2"]:hover { background: var(--accent); }
.cell[data-state="1"] {
  background: repeating-linear-gradient(135deg,
    rgba(251, 191, 36, 0.85) 0 4px, rgba(251, 191, 36, 0.4) 4px 8px);
}
.cell[data-state="1"]:hover { background: rgba(251, 191, 36, 0.95); }

.grid-read .cell.has-maybe { box-shadow: inset 0 -2px 0 rgba(251, 191, 36, 0.75); }
.legend-swatch.has-maybe { box-shadow: inset 0 -2px 0 rgba(251, 191, 36, 0.85); }

.readout {
  margin-top: 16px; padding: 14px 16px; min-height: 76px;
  background: var(--panel-2); border: 1px solid var(--line);
  border-radius: var(--radius-sm); font-size: 0.88rem; color: var(--muted);
}
.readout-when { font-weight: 700; color: var(--text); margin-bottom: 8px; font-size: 0.92rem; }
.readout-row { display: flex; gap: 10px; padding: 3px 0; overflow-wrap: anywhere; }
.readout-key { min-width: 76px; flex-shrink: 0; font-weight: 650; }
.readout-row.state-2 .readout-key { color: var(--accent); }
.readout-row.state-1 .readout-key { color: var(--accent-warm); }
.readout-row.state-0 .readout-key { color: #6b7196; }

.window-push { color: var(--accent-warm); }

.grid-summary { margin-top: 14px; font-size: 0.88rem; color: var(--muted); }
.grid-summary strong { color: var(--text); }

.legend { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 16px; font-size: 0.8rem; color: var(--muted); }
.legend-swatch { width: 18px; height: 12px; border-radius: 3px; display: inline-block; }
.legend-item { display: inline-flex; align-items: center; gap: 6px; }

.share-panel .share-row { margin-top: 14px; }
.share-row { display: flex; gap: 10px; align-items: stretch; }
.share-row input { flex: 1; min-width: 0; font-size: 0.86rem; }
@media (max-width: 560px) { .share-row { flex-direction: column; } }

/* ---------- members ---------- */

.members { display: grid; gap: 12px; margin-top: 22px; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.member {
  background: var(--panel-2); border: 1px solid var(--line);
  border-radius: var(--radius-sm); padding: 16px; position: relative;
}
.member.is-me { border-color: rgba(56, 189, 248, 0.5); }
.member-name { font-weight: 700; font-size: 0.96rem; display: flex; align-items: center; gap: 8px; }
.badge {
  font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.08em;
  background: rgba(56, 189, 248, 0.14); color: var(--accent);
  padding: 2px 7px; border-radius: 999px; font-weight: 700;
}
.member-meta { font-size: 0.8rem; color: var(--muted); margin-top: 4px; }
.member-ask { font-size: 0.84rem; color: #b8bed9; margin-top: 8px; font-style: italic; }
.member-remove {
  position: absolute; top: 10px; right: 10px;
  background: none; border: none; color: #5a6086; cursor: pointer;
  font-size: 1.1rem; line-height: 1; padding: 4px;
}
.member-remove:hover { color: var(--danger); }
.empty-note { color: var(--muted); font-size: 0.9rem; padding: 16px 0; }

.response-summary {
  margin-top: 22px; padding: 12px 16px;
  border-radius: var(--radius-sm); font-size: 0.9rem; color: var(--muted);
  background: rgba(56, 189, 248, 0.07); border: 1px solid rgba(56, 189, 248, 0.22);
}
.response-summary:empty { display: none; }
.response-summary strong { color: var(--accent); }
.response-summary.is-waiting {
  background: rgba(251, 191, 36, 0.07); border-color: rgba(251, 191, 36, 0.26);
}
.response-summary.is-waiting strong { color: var(--accent-warm); }

.member.is-waiting { border-style: dashed; border-color: rgba(251, 191, 36, 0.4); }
.badge-waiting { background: rgba(251, 191, 36, 0.15); color: var(--accent-warm); }

.chase-btn { margin-top: 16px; }

.member-mail {
  margin-top: 12px; background: none; font-family: inherit;
  border: 1px solid var(--line); color: var(--muted);
  border-radius: 999px; padding: 5px 12px; font-size: 0.78rem; cursor: pointer;
  transition: color .15s, border-color .15s;
}
.member-mail:hover { color: var(--accent); border-color: var(--accent); }

.send-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 18px; }

/* ---------- windows ---------- */

.windows { display: grid; gap: 12px; margin-top: 16px; }
.window {
  display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: space-between;
  background: var(--panel-2); border: 1px solid var(--line);
  border-radius: var(--radius-sm); padding: 16px; cursor: pointer;
  text-align: left; width: 100%; font-family: inherit; color: inherit;
  transition: border-color .15s, background .15s;
}
.window:hover { border-color: var(--accent); }
.window.is-chosen { border-color: var(--accent-warm); background: rgba(251, 191, 36, 0.07); }
.window-main { min-width: 0; }
.window-time { font-size: 1.02rem; font-weight: 700; letter-spacing: -0.01em; }
.window-sub { font-size: 0.82rem; color: var(--muted); margin-top: 4px; }
.window-score { font-size: 0.8rem; white-space: nowrap; color: var(--muted); text-align: right; }
.window-score strong { display: block; font-size: 1.25rem; color: var(--accent); letter-spacing: -0.02em; }
.window.is-chosen .window-score strong { color: var(--accent-warm); }
.window-missing { color: var(--danger); }

/* ---------- cadence ---------- */

.cadence-options { display: grid; gap: 12px; margin: 18px 0 24px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.cadence { position: relative; display: block; cursor: pointer; }
.cadence input { position: absolute; opacity: 0; pointer-events: none; }
.cadence-body {
  display: block; padding: 18px; border-radius: var(--radius-sm);
  background: var(--panel-2); border: 1px solid var(--line);
  transition: border-color .15s, background .15s; height: 100%;
}
.cadence-body strong { display: block; font-size: 1rem; margin-bottom: 6px; }
.cadence-body span { font-size: 0.85rem; color: var(--muted); }
.cadence input:checked + .cadence-body { border-color: var(--accent); background: rgba(56, 189, 248, 0.08); }
.cadence input:focus-visible + .cadence-body { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- invite ---------- */

.invite-layout { display: grid; gap: 20px; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); align-items: start; }
@media (max-width: 860px) { .invite-layout { grid-template-columns: 1fr; } }
.invite-preview h3 { margin-bottom: 14px; }
.invite-line { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line-soft); font-size: 0.9rem; }
.invite-line:last-child { border-bottom: none; }
.invite-key { color: var(--muted); min-width: 92px; flex-shrink: 0; }
.invite-val { color: var(--text); min-width: 0; overflow-wrap: anywhere; }
.invite-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0; }
.invite-empty { color: var(--muted); font-size: 0.92rem; }

/* ---------- faq ---------- */

.faq {
  margin-top: 26px; max-width: 760px;
  border-top: 1px solid var(--line-soft);
}
.faq details { border-bottom: 1px solid var(--line-soft); }
.faq summary {
  cursor: pointer; list-style: none;
  padding: 16px 36px 16px 0; position: relative;
  font-size: 0.98rem; font-weight: 650; color: var(--text);
  transition: color .15s;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--accent); }
.faq summary::after {
  content: '+'; position: absolute; right: 8px; top: 50%;
  transform: translateY(-50%);
  color: var(--accent); font-size: 1.3rem; font-weight: 400; line-height: 1;
}
.faq details[open] summary::after { content: '–'; }
.faq details[open] summary { color: var(--accent); }
.faq p {
  color: var(--muted); font-size: 0.92rem;
  padding: 0 36px 20px 0; margin-top: -2px; max-width: 64ch;
}
.faq em { font-style: normal; color: var(--text); }

/* ---------- footer ---------- */

.footer { padding: 40px 0 56px; background: var(--bg); }
.footer-inner { display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; align-items: center; }