/* TutorPlus site group: home, teach, about, help, terms, privacy, login, signup.
   Builds on kit.css tokens and components. Flat colour, hairlines, no gradients, no shadows. */

/* ------------------------------------------------------------------ Hero */
.hero { padding-block: 72px 88px; overflow: hidden; overflow: clip; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 440px) minmax(0, 1fr); gap: 48px; align-items: center; }
.hero-copy { display: flex; flex-direction: column; gap: 24px; min-width: 0; }
.hero-copy .display { font-size: clamp(40px, 4.8vw, 70px); }
.hero-search { display: flex; gap: 10px; align-items: stretch; margin-top: 8px; }
.hero-search .input-group { flex: 1 1 auto; min-width: 0; }
.hero-search .input { height: var(--btn-h-lg); font-size: 16px; }
.hero-search .btn { flex: 0 0 auto; }
.hero-facts { display: flex; flex-wrap: wrap; gap: 6px 20px; font-size: 14px; color: var(--text-2); }
.hero-facts strong { color: var(--text); font-weight: 600; }
.hero-facts span + span { position: relative; }
.hero-facts span + span::before { content: ""; position: absolute; left: -11px; top: 50%; width: 3px; height: 3px; margin-top: -1px; border-radius: 50%; background: var(--line-strong); }
.hero-visual { position: relative; min-width: 0; }
.hero-cap { margin-top: 14px; font-size: 13px; }
.hero-cap a { color: var(--text-2); font-weight: 500; }
.hero-cap a:hover { color: var(--cobalt); }

/* rendered course player (static, live data) */
.hp {
  display: block; width: 884px; color: var(--text); background: var(--paper);
  border: 1px solid var(--line-strong); border-radius: 14px; overflow: hidden; font-size: 13px; line-height: 1.4;
  transition: border-color .2s var(--ease);
}
.hp:hover { color: var(--text); border-color: var(--text-3); }
.hp:focus-visible { outline: var(--focus); outline-offset: 4px; }
.hp-top { display: flex; align-items: center; gap: 12px; height: 48px; padding: 0 16px; border-bottom: 1px solid var(--line); }
.hp-mark svg { width: 20px; height: 20px; }
.hp-title { flex: 1 1 auto; min-width: 0; font-weight: 600; font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hp-prog { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; font-size: 12px; color: var(--text-2); }
.hp-prog .progress { width: 120px; height: 4px; }
.hp-body { display: grid; grid-template-columns: 212px minmax(0, 1fr) 260px; min-height: 452px; }
.hp-side { border-right: 1px solid var(--line); padding: 14px 10px; background: #FAFAF8; display: flex; flex-direction: column; gap: 2px; }
.hp-sec { font-size: 12px; font-weight: 600; color: var(--text); padding: 4px 8px 8px; }
.hp-sec-closed { display: flex; justify-content: space-between; gap: 8px; padding: 10px 8px; border-top: 1px solid var(--line); font-weight: 500; color: var(--text-2); }
.hp-sec-closed span:first-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hp-sec-closed .num { color: var(--text-3); }
.hp-lessons { display: grid; gap: 2px; margin-bottom: 6px; }
.hp-lessons li { display: grid; grid-template-columns: 16px minmax(0, 1fr) auto; align-items: center; gap: 8px; min-height: 34px; padding: 6px 8px; border-radius: 6px; color: var(--text-2); font-size: 12px; }
.hp-lessons .icon { color: var(--text-3); }
.hp-ltitle { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hp-ldur { color: var(--text-3); font-size: 12px; }
.hp-lessons li.is-done .icon { color: var(--ok); }
.hp-lessons li.is-current { background: var(--cobalt-tint); color: var(--cobalt); font-weight: 600; }
.hp-lessons li.is-current .icon { color: var(--cobalt); }
.hp-main { padding: 16px; display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.hp-video { position: relative; border-radius: 8px; overflow: hidden; aspect-ratio: 16 / 10; background: var(--ink); margin-bottom: 8px; }
.hp-video > svg, .hp-video > img { width: 100%; height: 100%; display: block; object-fit: cover; }
.hp-play { position: absolute; left: 50%; top: 50%; width: 56px; height: 56px; margin: -28px 0 0 -28px; display: grid; place-items: center; border-radius: 50%; background: var(--ink); color: #fff; }
.hp-play .icon { fill: currentColor; margin-left: 3px; }
.hp-bar { position: absolute; left: 12px; right: 12px; bottom: 12px; height: 4px; border-radius: 2px; background: rgba(13, 13, 17, .28); overflow: hidden; }
.hp-bar span { display: block; width: 34%; height: 100%; background: var(--paper); }
.hp-eyebrow { font-size: 12px; color: var(--text-3); }
.hp-lesson { font-size: 17px; font-weight: 600; letter-spacing: -0.015em; line-height: 1.3; }
.hp-actions { display: flex; gap: 8px; margin-top: 8px; }
.hp-btn { display: inline-flex; align-items: center; height: 32px; padding: 0 12px; border-radius: 6px; border: 1px solid var(--line-strong); font-size: 12px; font-weight: 600; }
.hp-btn-primary { background: var(--cobalt); border-color: var(--cobalt); color: #fff; }
.hp-tutor { border-left: 1px solid var(--line); display: flex; flex-direction: column; min-width: 0; }
.hp-tutor-head { display: flex; align-items: center; gap: 8px; height: 44px; padding: 0 14px; border-bottom: 1px solid var(--line); font-weight: 600; font-size: 13px; }
.hp-tutor-head .icon { color: var(--cobalt); }
.hp-msgs { flex: 1 1 auto; display: flex; flex-direction: column; gap: 10px; padding: 14px; }
.hp-msg { max-width: 92%; padding: 9px 12px; border-radius: 10px; font-size: 13px; line-height: 1.45; }
.hp-msg-me { align-self: flex-end; background: var(--cobalt); color: #fff; border-bottom-right-radius: 4px; }
.hp-msg-ai { align-self: flex-start; background: var(--bone); color: var(--text); border-bottom-left-radius: 4px; }
.hp-input { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin: 0 12px 12px; height: 38px; padding: 0 8px 0 12px; border: 1px solid var(--line-strong); border-radius: 8px; color: var(--text-3); font-size: 13px; }
.hp-input .icon { color: var(--cobalt); }

@media (max-width: 1080px) {
  .hero { padding-block: 48px 64px; }
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  .hero-copy { max-width: 640px; }
}
@media (max-width: 760px) {
  .hero { padding-block: 32px 48px; }
  .hero-copy { gap: 18px; }
  .hero-search { flex-direction: column; }
  .hero-search .btn { width: 100%; }
  .hp { width: calc(100% + 56px); }
  .hp-body { grid-template-columns: minmax(0, 1fr); min-height: 0; }
  .hp-side { display: none; }
  .hp-tutor { border-left: 0; border-top: 1px solid var(--line); }
  .hp-prog .progress { width: 64px; }
  .hp-actions { display: none; }
  .hp-msgs { padding-right: 70px; }
}

/* ------------------------------------------------------------------ Category rail */
.cat-rail { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.cat-tile {
  position: relative; display: grid; grid-template-rows: auto auto 1fr auto; gap: 6px; min-height: 196px; padding: 20px;
  border: 1px solid var(--line); border-radius: var(--r-card); background: var(--paper); color: var(--text); transition: border-color .15s var(--ease);
}
.cat-tile:hover { color: var(--text); border-color: var(--line-strong); }
.cat-tile:hover .cat-name { color: var(--cobalt); }
.cat-stamp { width: 44px; height: 44px; border-radius: 10px; overflow: hidden; display: grid; place-items: center; margin-bottom: 10px; }
.cat-stamp svg { width: 100%; height: 100%; }
.cat-stamp .icon { width: 22px; height: 22px; }
.cat-name { font-size: 18px; font-weight: 600; letter-spacing: -0.015em; line-height: 1.25; transition: color .15s; }
.cat-kids { font-size: 13px; color: var(--text-3); line-height: 1.45; }
.cat-count { font-size: 13px; font-weight: 600; color: var(--text-2); padding-top: 10px; }
.cat-all { background: var(--cobalt-tint); border-color: transparent; }
.cat-all .cat-stamp { background: var(--cobalt); color: #fff; }
.cat-all:hover { border-color: var(--cobalt); }
@media (max-width: 1080px) {
  .cat-rail { grid-template-columns: none; grid-auto-flow: column; grid-auto-columns: calc((100% - 32px) / 3.2); overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; padding-bottom: 4px; }
  .cat-rail::-webkit-scrollbar { display: none; }
  .cat-tile { scroll-snap-align: start; }
}
@media (max-width: 760px) {
  .cat-rail { grid-auto-columns: 58%; gap: 12px; margin-inline: calc(var(--gutter) * -1); padding-inline: var(--gutter); scroll-padding-inline: var(--gutter); }
  .cat-tile { min-height: 172px; padding: 16px; }
  .cat-name { font-size: 16px; }
}

/* ------------------------------------------------------------------ Course rows + instructors */
.home-row .section-head { margin-bottom: 32px; }
@media (max-width: 560px) {
  .home-grid.grid-courses { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 12px; }
  .home-grid .ccard { gap: 10px; }
  .home-grid .ccard-title { font-size: 15px; }
  .home-grid .ccard-by { font-size: 13px; }
  .home-grid .ccard-price { font-size: 15px; }
  .home-grid .stars-count { display: none; }
}
.inst-grid { --gap: 16px; }

/* ------------------------------------------------------------------ Steps */
.steps { display: grid; gap: 32px; counter-reset: none; }
.steps-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.steps-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.steps > li { display: flex; flex-direction: column; gap: 10px; padding-top: 20px; border-top: 1px solid var(--line-strong); }
.steps p { color: var(--text-2); font-size: 16px; line-height: 1.55; }
.step-n { font-size: 13px; font-weight: 700; color: var(--cobalt); letter-spacing: .04em; }
@media (max-width: 1080px) { .steps-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 760px) { .steps-3, .steps-4 { grid-template-columns: minmax(0, 1fr); gap: 24px; } .steps p { font-size: 15px; } }

/* ------------------------------------------------------------------ Cobalt teach band */
.teach-band { background: var(--cobalt); color: #fff; }
.teach-band-inner { display: flex; align-items: flex-end; justify-content: space-between; gap: 40px; padding-block: 88px; }
.teach-band-inner > .stack { max-width: 680px; }
.teach-band .eyebrow { color: rgba(255, 255, 255, .72); }
.teach-band .lead { color: rgba(255, 255, 255, .86); }
.teach-band .btn-on-ink { --bd: rgba(255, 255, 255, .5); }
.teach-band .btn-on-ink:hover { --bg: var(--cobalt-deep); --bd: #fff; }
.btn-white { --bg: var(--paper); --fg: var(--ink); --bd: var(--paper); }
.btn-white:hover { --bg: var(--bone); --bd: var(--bone); }
.teach-band .btn:focus-visible { outline-color: #fff; }
@media (max-width: 900px) { .teach-band-inner { flex-direction: column; align-items: flex-start; padding-block: 56px; gap: 28px; } .teach-band .btn-row { width: 100%; } }

/* ------------------------------------------------------------------ Teach page */
.teach-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) 420px; gap: 72px; align-items: center; }
.split-card { display: flex; flex-direction: column; gap: 18px; padding: 28px; border-radius: var(--r-card); background: var(--bone); }
.split-bar { display: flex; height: 12px; border-radius: 6px; background: var(--line-strong); overflow: hidden; }
.split-bar span { background: var(--cobalt); height: 100%; }
.split-rows { margin: 0; display: grid; }
.split-rows > div { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 12px 0; border-top: 1px solid var(--line-strong); font-size: 15px; }
.split-rows dt { display: flex; align-items: center; gap: 10px; color: var(--text-2); }
.split-rows dd { margin: 0; font-weight: 600; }
.split-rows > div:first-child dd { font-size: 28px; font-weight: 700; letter-spacing: -0.03em; color: var(--cobalt); }
.dot { width: 10px; height: 10px; border-radius: 3px; background: var(--line-strong); flex: 0 0 auto; }
.dot-cobalt { background: var(--cobalt); }
.why-grid { --gap: 16px; }
.why { display: flex; flex-direction: column; gap: 10px; padding: 24px; border-radius: var(--r-card); background: var(--paper); }
.why p { font-size: 15px; color: var(--text-2); line-height: 1.55; }
.why-ic { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 10px; background: var(--cobalt-tint); color: var(--cobalt); margin-bottom: 6px; }
.apply-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 560px); gap: 72px; align-items: start; }
.apply-copy { position: sticky; top: calc(var(--admin-bar) + var(--nav-h) + 32px); }
.apply-points { display: grid; gap: 10px; margin-top: 8px; }
.apply-points li { display: flex; align-items: center; gap: 10px; font-size: 15px; }
.apply-points .icon { color: var(--cobalt); }
.apply-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-card); padding: 32px; }
.apply-form fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
.apply-form fieldset + fieldset { padding-top: 24px; border-top: 1px solid var(--line); }
.apply-legend { float: left; width: 100%; padding: 0; margin-bottom: 4px; font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--text-3); }
.apply-who { display: flex; align-items: center; gap: 12px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.apply-who strong { display: block; font-size: 15px; font-weight: 600; }
.apply-who span:not(.avatar) { font-size: 13px; color: var(--text-3); }
.status-card { display: flex; flex-direction: column; align-items: flex-start; gap: 14px; }
.status-card .btn { margin-top: 6px; }
.status-quote { font-size: 17px; font-weight: 500; color: var(--text); padding-left: 14px; border-left: 3px solid var(--cobalt); }
@media (max-width: 1080px) {
  .teach-hero-grid { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  .split-card { max-width: 520px; }
  .apply-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .apply-copy { position: static; }
}
@media (max-width: 760px) {
  .apply-card { padding: 20px 16px; margin-inline: calc(var(--gutter) * -1); border-radius: 0; border-inline: 0; }
  .split-card { padding: 20px; }
  .why { padding: 20px; }
}

/* password show toggle inside an input */
.input-group.pw > .input { padding-left: 14px; padding-right: 72px; }
.input-group.pw .input-affix { height: 36px; min-width: 56px; font-size: 13px; color: var(--text-2); }

/* ------------------------------------------------------------------ Auth (login, signup) */
body.auth-page { background: var(--bone); }
.auth { min-height: calc(100vh - var(--admin-bar)); display: flex; flex-direction: column; align-items: center; justify-content: space-between; gap: 32px; padding: 56px var(--gutter) 24px; }
.auth-inner { width: 100%; max-width: 420px; display: flex; flex-direction: column; align-items: stretch; gap: 20px; margin-block: auto; }
.auth-brand { align-self: center; margin-bottom: 12px; }
.auth-brand svg { height: 30px; }
.auth-card { display: flex; flex-direction: column; gap: 20px; padding: 32px; background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-card); }
.auth-head { display: grid; gap: 6px; }
.auth-title { font-size: 26px; line-height: 1.2; font-weight: 700; letter-spacing: -0.025em; }
.auth-sub { font-size: 15px; color: var(--text-2); }
.auth-forgot { font-size: 13px; font-weight: 500; color: var(--cobalt); min-height: 24px; }
.auth-forgot:hover { text-decoration-color: currentColor; }
.auth-alt { text-align: center; font-size: 15px; color: var(--text-2); }
.auth-alt-2 { margin-top: -12px; font-size: 14px; }
.auth-legal { display: flex; gap: 20px; font-size: 13px; }
.auth-legal a { color: var(--text-3); }
.auth-legal a:hover { color: var(--text); }
@media (max-width: 760px) {
  body.auth-page { background: var(--paper); }
  .auth { padding-top: 24px; }
  .auth-brand { align-self: flex-start; margin-bottom: 16px; }
  .auth-card { padding: 0; border: 0; border-radius: 0; }
  .auth-title { font-size: 28px; }
}

/* ------------------------------------------------------------------ Content pages */
.page-hero { padding-block: 72px 56px; border-bottom: 1px solid var(--line); }
.page-hero-tight { padding-block: 56px 40px; }
.page-hero-inner { max-width: 820px; }
.about-stats { margin-top: 48px; }
.page-cols { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 80px; padding-block: 64px 96px; align-items: start; }
.page-prose { max-width: 720px; }
.page-prose h2 { scroll-margin-top: calc(var(--nav-h) + 24px); }
.page-prose > h2:first-child, .page-prose > .note:first-child + h2 { margin-top: 0; }
.page-prose .note { margin-block: 0 8px; }
.page-prose .lead { font-size: 19px; }
.page-aside { position: sticky; top: calc(var(--admin-bar) + var(--nav-h) + 32px); display: grid; gap: 16px; }
.aside-card { display: grid; gap: 10px; padding: 24px; border-radius: var(--r-card); background: var(--bone); }
.aside-card .text-2 { font-size: 15px; margin-bottom: 6px; }
.help-cols { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 64px; padding-block: 48px 96px; align-items: start; }
.help-index { position: sticky; top: calc(var(--admin-bar) + var(--nav-h) + 32px); display: grid; gap: 2px; }
.help-index a { display: flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 40px; padding: 0 12px; border-radius: 8px; font-size: 15px; font-weight: 500; color: var(--text-2); }
.help-index a:hover { background: var(--bone); color: var(--text); }
.help-index .num { font-size: 13px; color: var(--text-3); }
.help-body { display: flex; flex-direction: column; gap: 48px; max-width: 800px; min-width: 0; }
.faq-group { display: grid; gap: 12px; scroll-margin-top: calc(var(--nav-h) + 24px); }
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; padding: 14px 0; font-size: 17px; font-weight: 600; letter-spacing: -0.01em; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--cobalt); }
.faq summary:focus-visible { outline: var(--focus); outline-offset: 2px; border-radius: 4px; }
.faq summary .icon { color: var(--text-3); transition: transform .2s var(--ease); }
.faq details[open] summary .icon { transform: rotate(45deg); color: var(--cobalt); }
.faq details p { padding: 0 48px 20px 0; color: var(--text-2); font-size: 16px; line-height: 1.6; max-width: 68ch; }
.help-more { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 28px; border-radius: var(--r-card); background: var(--bone); }
.help-more .text-2 { font-size: 15px; margin-top: 4px; }
@media (max-width: 1080px) {
  .page-cols { grid-template-columns: minmax(0, 1fr); gap: 48px; }
  .page-aside { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .help-cols { grid-template-columns: minmax(0, 1fr); gap: 24px; padding-top: 24px; }
  .help-index { display: none; }
}
@media (max-width: 760px) {
  .page-hero { padding-block: 40px 32px; }
  .page-cols { padding-block: 40px 56px; }
  .page-aside { grid-template-columns: minmax(0, 1fr); }
  .help-body { gap: 36px; }
  .faq summary { font-size: 16px; min-height: 56px; }
  .faq details p { padding-right: 0; font-size: 15px; }
  .help-more { flex-direction: column; align-items: flex-start; padding: 20px; }
}

/* ------------------------------------------------------------------ Photo bands (teach, about) */
.photo-band { padding-block: 0 72px; }
.photo-band-img { display: block; width: 100%; aspect-ratio: 21 / 9; object-fit: cover; border-radius: var(--r-card); background: var(--bone); }
@media (max-width: 760px) { .photo-band { padding-block: 0 40px; } .photo-band-img { aspect-ratio: 4 / 3; border-radius: 12px; } }