/* Public pages (/, /login, /signup): calm editorial. Colours come from palette.css. */
:root { --mark: #ffe58a; --serif: 'Lora', Georgia, serif; --sans: 'Hanken Grotesk', system-ui, sans-serif; }
:root[data-theme="dark"] { --mark: rgba(255, 202, 118, .38); }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body.pub { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.6 var(--sans); overflow-x: hidden; }
@media (min-width: 900px) { body.pub { font-size: 16px; } }
.pub a { color: var(--primary); text-underline-offset: 3px; }
.pub :focus-visible { outline: 3px solid var(--primary); outline-offset: 3px; border-radius: 3px; }
/* Public pages skip the theme picker bar; a saved theme still applies. */
.pub .theme-toolbar { display: none; }
.skip { position: absolute; left: -999px; top: 8px; }
.skip:focus { left: 16px; background: var(--card); padding: 6px 10px; z-index: 9; }
.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding-inline: 20px; }
.narrow { max-width: 720px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; color: var(--text); letter-spacing: -.01em; margin: 0; }
p { margin: 0; }
.mark { background: linear-gradient(transparent 55%, var(--mark) 55%); padding: 0 .08em; color: inherit; }
.eyebrow { font: 600 12px/1.4 var(--sans); letter-spacing: .08em; text-transform: uppercase; color: var(--text-secondary); }
.muted { color: var(--text-secondary); }
.rule { border: 0; border-top: 1px solid var(--border); margin: 0; }

/* Buttons: small pills and text links, never giant CTAs */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; height: 38px; padding: 0 16px; border-radius: 999px; font: 600 14px/1 var(--sans); text-decoration: none; border: 1px solid var(--action); background: var(--action); color: var(--on-action) !important; cursor: pointer; white-space: nowrap; }
.btn:hover { background: var(--action-hover); border-color: var(--action-hover); }
.btn.ghost { background: transparent; color: var(--primary) !important; border-color: var(--field-border); }
.btn.ghost:hover { background: var(--primary-light); }
.btn:disabled { opacity: .55; cursor: default; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; }
.textlink { font-weight: 600; font-size: 14px; text-decoration: none; }
.textlink:hover { text-decoration: underline; }

/* Header + footer */
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-block: 18px; }
.brand { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; color: var(--text) !important; font: 600 18px/1 var(--serif); }
.brand svg { width: 24px; height: 24px; color: var(--primary); }
.top nav { display: flex; align-items: center; gap: 6px 16px; flex-wrap: wrap; justify-content: flex-end; }
.top nav a:not(.btn) { color: var(--text-secondary); text-decoration: none; font-size: 14px; font-weight: 500; }
.top nav a:not(.btn):hover { color: var(--text); }
@media (max-width: 480px) { .top .hide-sm { display: none; } }
.foot { padding-block: 28px 36px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px; font-size: 13px; color: var(--text-secondary); }
.foot nav { display: flex; gap: 16px; flex-wrap: wrap; }
.foot a { color: var(--text-secondary); text-decoration: none; }
.foot a:hover { color: var(--text); text-decoration: underline; }

/* Landing */
.landing .top-bar { border-bottom: 1px solid var(--border); }
.landing .top { padding-block: 12px; justify-content: flex-start; gap: 12px 28px; }
.landing .brand { font: 500 22px/1 var(--serif); letter-spacing: -.01em; }
.landing .anchors { display: none; gap: 22px; }
.landing .account { margin-left: auto; gap: 6px 18px; flex-wrap: nowrap; }
@media (min-width: 760px) { .landing .anchors { display: flex; } }
.btn.sm { height: 32px; padding: 0 12px; border-radius: 6px; font-size: 13.5px; }
.landing .btn { border-radius: 6px; background: var(--text); border-color: var(--text); color: var(--bg) !important; }
.landing .btn:hover { opacity: .9; }
.landing .textlink { color: var(--text); font-size: 14.5px; text-decoration: underline; text-decoration-color: var(--field-border); }
.landing .eyebrow { font-weight: 500; font-size: 12px; }

.hero { padding-block: 72px 80px; display: grid; gap: 48px; }
.hero h1 { margin-top: 14px; font-weight: 400; font-size: clamp(40px, 11vw, 58px); line-height: 1.08; letter-spacing: -.02em; max-width: 15ch; }
@media (min-width: 700px) { .hero .nowrap { white-space: nowrap; } }
.hero .mark { background: linear-gradient(transparent 38%, var(--mark) 38%, var(--mark) 90%, transparent 90%); padding: 0 .06em; }
.hero .sub { margin-top: 22px; max-width: 46ch; font-size: 1.12em; line-height: 1.6; color: var(--text-secondary); }
.hero .actions { margin-top: 30px; gap: 12px 24px; }
/* First phone screen = eyebrow, headline, sub, two actions. The card waits below. */
@media (max-width: 700px) {
  /* Phones: no forced full-screen hero; the step card follows the actions. */
  .hero { padding-block: 24px 40px; gap: 32px; }
}
@media (min-width: 1000px) { .hero { grid-template-columns: minmax(0, 1fr) 460px; gap: 72px; align-items: center; } }

/* Step-tutor card */
.tutor { border: 1px solid var(--border); border-radius: 10px; background: var(--card); padding: 22px; font-size: 14px; }
.tutor-head { display: flex; align-items: center; gap: 10px; padding-bottom: 14px; border-bottom: 1px solid var(--border); }
.chip { font-size: 12px; font-weight: 600; border: 1px solid var(--border); background: color-mix(in srgb, var(--text) 4%, var(--card)); border-radius: 4px; padding: 2px 7px; }
.topic { font-size: 13px; color: var(--text-secondary); }
.read { margin-left: auto; display: inline-flex; align-items: center; gap: 5px; font-size: 12.5px; font-weight: 600; color: var(--primary); white-space: nowrap; }
.read svg { width: 16px; height: 16px; }
.problem { margin-top: 18px; display: flex; align-items: center; justify-content: center; gap: 14px; padding: 18px; background: color-mix(in srgb, var(--text) 4%, var(--card)); border-radius: 6px; font: 400 28px/1 var(--serif); }
.frac { display: inline-flex; flex-direction: column; align-items: center; }
.frac i { font-style: normal; padding: 2px 4px; }
.frac i:first-child { border-bottom: 1.5px solid currentColor; }
.op { font-size: 22px; }
.problem .q { color: var(--text-secondary); }
.lbl { margin-top: 18px; font-size: 12.5px; font-weight: 600; }
.tutor .field { margin-top: 6px; height: 40px; display: flex; align-items: center; justify-content: space-between; padding: 0 12px; border: 1px solid var(--field-border); border-radius: 6px; font: 16px var(--serif); }
.tutor .field small { font: 12px var(--sans); color: var(--text-secondary); }
.hint { margin-top: 14px; padding: 12px 14px; border-left: 3px solid var(--highlight); background: var(--warning-bg); border-radius: 0 6px 6px 0; }
.hint-tag { font-size: 11.5px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--warning); }
.hint p { margin-top: 4px; font-size: 14px; line-height: 1.5; color: var(--text); }
.tutor-foot { margin-top: 18px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.ghost-link { font-size: 13.5px; font-weight: 600; }

/* Sections */
.section { padding-block: 64px; border-top: 1px solid var(--border); }
.section h2 { margin-top: 10px; font-weight: 400; font-size: clamp(28px, 6vw, 40px); line-height: 1.15; letter-spacing: -.015em; max-width: 20ch; }
.timeline { list-style: none; margin: 40px 0 0; padding: 0; display: grid; gap: 36px; }
.timeline li { position: relative; }
.num { position: relative; z-index: 1; display: inline-grid; place-items: center; height: 28px; padding: 0 8px; border: 1px solid var(--field-border); border-radius: 6px; background: var(--bg); font-size: 12.5px; font-weight: 600; }
.timeline h3 { margin-top: 16px; font-weight: 500; font-size: 20px; }
.timeline p { margin-top: 6px; color: var(--text-secondary); font-size: 14.5px; max-width: 36ch; }
.timeline .note { margin-top: 14px; padding-top: 10px; border-top: 1px solid var(--border); font-size: 13px; max-width: none; }
@media (min-width: 760px) {
  .timeline { grid-template-columns: repeat(3, 1fr); gap: 32px; }
  .timeline li::before { content: ""; position: absolute; top: 14px; left: 0; right: -32px; border-top: 1px solid var(--border); }
  .timeline li:last-child::before { right: 0; }
}

/* Parent evening panel */
.panel { border: 1px solid var(--border); border-radius: 10px; background: var(--card); padding: 24px 20px; }
@media (min-width: 760px) { .panel { padding: 36px 40px; } }
.panel-head { display: grid; gap: 12px 48px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.panel-head h2 { font-size: clamp(24px, 4.6vw, 28px); }
.panel-head .muted { font-size: 14.5px; max-width: 46ch; align-self: end; }
@media (min-width: 860px) { .panel-head { grid-template-columns: 1fr 1fr; } }
.evening { list-style: none; margin: 0; padding: 0; }
.evening li { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 24px; padding-block: 16px; border-bottom: 1px solid var(--border); font-size: 14.5px; }
.evening li:last-child { border-bottom: 0; padding-bottom: 0; }
.evening .what { font-weight: 500; }
.evening .meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 16px; color: var(--text-secondary); font-size: 13.5px; }
.evening .hints { color: var(--warning); background: var(--warning-bg); border-radius: 4px; padding: 1px 7px; }
.evening .hints.none { color: var(--text-secondary); background: none; padding: 0; }
.evening b { color: var(--text); font-weight: 600; }

.landing .foot { border-top: 1px solid var(--border); max-width: none; padding-inline: max(20px, calc((100% - 1040px) / 2)); }
.foot-brand { font: 500 16px/1 var(--serif); color: var(--text); margin-right: 10px; }

/* Auth pages */
.auth { min-height: 100vh; display: flex; flex-direction: column; }
.auth main { flex: 1; display: flex; align-items: flex-start; justify-content: center; padding-block: 20px 40px; }
.card { width: 100%; max-width: 420px; background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 26px 22px; }
.card.wide { max-width: 520px; }
@media (min-width: 520px) { .card { padding: 32px 30px; } }
.card h1 { font-size: 26px; line-height: 1.2; }
.card .intro { margin-top: 8px; color: var(--text-secondary); font-size: 14.5px; }
.form { margin-top: 20px; display: grid; gap: 14px; }
.form label, .form .label { display: block; font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 5px; }
.form .opt { font-weight: 400; color: var(--text-secondary); }
.form input[type=text], .form input[type=email], .form input[type=password], .form select, .form textarea { width: 100%; height: 40px; padding: 0 12px; border: 1px solid var(--field-border); border-radius: 8px; background: var(--card); color: var(--text); font: 15px var(--sans); }
.form textarea { height: auto; min-height: 76px; padding: 9px 12px; resize: vertical; line-height: 1.5; }
.form input:focus, .form select:focus, .form textarea:focus { outline: 2px solid var(--primary); outline-offset: 1px; border-color: var(--primary); }
.help { margin-top: 4px; font-size: 12.5px; color: var(--text-secondary); }
.two { display: grid; grid-template-columns: 1fr; gap: 14px; }
@media (min-width: 480px) { .two { grid-template-columns: 1fr 1fr; } }
.form .consent { display: flex; gap: 10px; align-items: flex-start; font-size: 13px; line-height: 1.5; color: var(--text-secondary); font-weight: 400 !important; cursor: pointer; }
.consent input { width: 18px; height: 18px; margin: 2px 0 0; flex: none; accent-color: var(--primary); }
.form .btn { justify-self: start; }
.ts { min-height: 0; }
.ts:not(:empty) { min-height: 65px; }
.msg { font-size: 14px; line-height: 1.5; border-radius: 8px; padding: 10px 12px; }
.msg:empty { display: none; }
.msg.err { background: var(--warning-bg); color: var(--warning); border: 1px solid var(--border); }
.msg.ok { background: var(--success-bg); color: var(--success); }
.below { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 14px; }
.below a { font-weight: 600; text-decoration: none; }
.below a:hover { text-decoration: underline; }
.fine { margin-top: 14px; font-size: 12.5px; color: var(--text-secondary); }
.card details { margin-top: 14px; font-size: 13.5px; color: var(--text-secondary); }
.card summary { cursor: pointer; color: var(--text); font-weight: 600; }
.card details p { margin-top: 6px; }
.clerk-divider { margin: 18px 0 10px; font-size: 12px; color: var(--text-secondary); text-transform: uppercase; letter-spacing: .06em; }
.done h1 { margin-top: 4px; }
.done p { margin-top: 10px; color: var(--text-secondary); }