/* AI for Teachers: shared stylesheet
   Mobile-first. System fonts only, so nothing to download.
   Motif: the ruled exercise-book page, a red-pen margin line and ticks,
   and a yellow highlighter used for actions. */

*, *::before, *::after { box-sizing: border-box; }

:root {
    --paper: #ffffff;
    --band: #f4f7fb;
    --line: #dde5ef;
    --line-soft: #e8eef6;
    --ink: #172033;
    --muted: #505b6e;
    --hi: #ffd33d;
    --hi-deep: #f5c21a;
    --hi-edge: #d9a800;
    --red: #c9382f;
    --rule: 30px;
    --radius: 6px;
    --shadow: 0 1px 2px rgba(23, 32, 51, 0.06), 0 12px 28px rgba(23, 32, 51, 0.07);
    --sans: "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    --serif: Charter, "Iowan Old Style", "Palatino Linotype", Georgia, serif;
}

html { -webkit-text-size-adjust: 100%; scroll-padding-top: 5rem; }

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--serif);
    font-size: 1.125rem;
    line-height: 1.7;
}

img { max-width: 100%; height: auto; display: block; }

h1, h2, h3, h4 {
    text-wrap: balance;
    font-family: var(--sans);
    font-weight: 700;
    line-height: 1.18;
    letter-spacing: -0.02em;
    margin: 0 0 0.6em;
}
h1 { font-size: clamp(1.9rem, 5.6vw, 2.85rem); line-height: 1.12; letter-spacing: -0.028em; }
h2 { font-size: clamp(1.5rem, 3.6vw, 2rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }

a { color: var(--ink); text-decoration-thickness: 1.5px; text-underline-offset: 0.2em; text-decoration-color: var(--red); }
a:hover { text-decoration-color: var(--ink); }

:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; border-radius: 2px; }

.container { width: 100%; max-width: 70rem; margin: 0 auto; padding: 0 1.25rem; }
.narrow { max-width: 42rem; }

.skip-link {
    position: absolute; left: -999px; top: 0.5rem;
    background: var(--hi); color: var(--ink); font-family: var(--sans); font-weight: 700;
    padding: 0.6rem 1rem; border-radius: var(--radius); z-index: 200;
}
.skip-link:focus { left: 0.5rem; }

/* ===== Header and navigation ===== */
.site-header {
    background: rgba(255, 255, 255, 0.97);
    border-bottom: 1px solid var(--line);
    position: sticky; top: 0; z-index: 100;
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; min-height: 4.25rem; }

.wordmark {
    font-family: var(--sans); font-weight: 700; font-size: 1.2rem; letter-spacing: -0.02em;
    text-decoration: none; color: var(--ink); display: inline-flex; align-items: center; white-space: nowrap;
}
.wordmark:hover { color: var(--ink); }
.wordmark .mark { background: var(--hi); padding: 0.08em 0.38em; border-radius: 3px; margin-right: 0.35em; font-weight: 800; }

.nav-toggle {
    font: 600 0.95rem var(--sans); background: var(--paper); color: var(--ink);
    border: 1px solid #b9c5d6; border-radius: var(--radius); padding: 0.5rem 1rem; cursor: pointer;
}

.nav-menu {
    display: none; list-style: none; margin: 0; padding: 0.4rem 0;
    position: absolute; left: 0; right: 0; top: 100%;
    background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 12px 24px rgba(23, 32, 51, 0.1);
}
.nav-menu.open { display: block; }
.nav-menu a {
    display: block; padding: 0.8rem 1.25rem; font-family: var(--sans); font-weight: 600; font-size: 1rem;
    text-decoration: none;
}
.nav-menu a[aria-current="page"] { background: var(--band); box-shadow: inset 3px 0 0 var(--red); }
.nav-menu a:hover { background: var(--band); }
.nav-menu .nav-book { margin: 0.5rem 1.25rem 0.6rem; background: var(--hi); border: 1px solid var(--hi-edge); border-radius: var(--radius); text-align: center; }
.nav-menu .nav-book:hover { background: var(--hi-deep); }

@media (min-width: 64rem) {
    .nav-toggle { display: none; }
    .nav-menu {
        display: flex; position: static; background: none; border: 0; box-shadow: none;
        gap: 0.1rem; align-items: center; padding: 0;
    }
    .nav-menu a { padding: 0.5rem 0.7rem; font-size: 0.95rem; white-space: nowrap; }
    .nav-menu a:hover { background: none; text-decoration: underline; text-decoration-color: var(--red); text-underline-offset: 0.35em; text-decoration-thickness: 2px; }
    .nav-menu a[aria-current="page"] { background: none; box-shadow: inset 0 -2px 0 var(--red); }
    .nav-menu .nav-book { margin: 0 0 0 0.75rem; padding: 0.55rem 1.05rem; text-decoration: none !important; }
}

/* ===== Buttons ===== */
.btn {
    display: inline-block; font: 700 1rem/1.2 var(--sans); text-decoration: none;
    background: var(--hi); color: var(--ink); border: 1px solid var(--hi-edge); border-radius: var(--radius);
    box-shadow: 0 1px 0 var(--hi-edge);
    padding: 0.95rem 1.5rem; cursor: pointer; text-align: center;
}
.btn:hover { background: var(--hi-deep); color: var(--ink); }
.btn-dark { background: var(--ink); color: #fff; border-color: var(--ink); box-shadow: none; }
.btn-dark:hover { background: #000; color: #fff; }
.cta-row { display: flex; flex-wrap: wrap; gap: 0.9rem 1.5rem; align-items: center; }
.fine { font-size: 0.975rem; color: var(--muted); margin: 1.1rem 0 0; }

/* ===== Hero: a sheet of ruled paper on a pale desk ===== */
.hero { background: var(--band); padding: 1.75rem 0 2.75rem; border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; gap: 1.75rem; }

.sheet {
    position: relative; background: var(--paper);
    border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
}
.sheet::before {
    content: ""; position: absolute; top: 0; bottom: 0; left: 1.4rem; width: 2px;
    background: var(--red); opacity: 0.7; border-radius: 1px;
}
.sheet-head { padding: 1.9rem 1.4rem 1.1rem 2.6rem; }
.sheet-head h1 { margin: 0; }

.ruled {
    background-image: linear-gradient(to bottom, transparent calc(100% - 1px), var(--line-soft) 0);
    background-size: 100% var(--rule);
    background-position: 0 -4px;
    padding: 0 1.4rem 0 2.6rem;
    line-height: var(--rule);
}
.ruled p { margin: 0 0 var(--rule); }
.ruled p:last-child { margin-bottom: 0; }

.sheet-foot { padding: 1.4rem 1.4rem 1.7rem 2.6rem; border-top: 1px solid var(--line); margin-top: 0.6rem; }

.hero-art {
    border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
    background: #e2ebf5; position: relative;
    width: 100%; max-width: 30rem; margin: 0 auto;
}
/* Phones and tablets: a square crop that keeps the desk and the teacher, trims empty sky */
.hero-art img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; object-position: center bottom; }

@media (min-width: 64rem) {
    .hero { padding: 3.5rem 0 4.25rem; }
    .hero-grid { grid-template-columns: 1fr 1fr; gap: 3rem; }
    /* Desktop: the illustration fills the full height of the sheet beside it */
    .hero-art { max-width: none; margin: 0; align-self: stretch; }
    .hero-art img { position: absolute; inset: 0; height: 100%; aspect-ratio: auto; }
    .sheet::before { left: 2.1rem; }
    .sheet-head { padding: 2.4rem 2.2rem 1.3rem 3.6rem; }
    .ruled { padding: 0 2.2rem 0 3.6rem; }
    .sheet-foot { padding: 1.6rem 2.2rem 2rem 3.6rem; }
}

/* ===== Sections ===== */
.section { padding: 3.5rem 0; }
.band { background: var(--band); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 40rem; margin-bottom: 2.25rem; }
.section-head h2 { margin-bottom: 0.5rem; }
.section-head p { color: var(--muted); margin: 0; }
@media (min-width: 48rem) { .section { padding: 5rem 0; } }

/* Heading on the left, content on the right (desktop) */
.split { display: grid; gap: 0.5rem; }
.split .section-head { margin-bottom: 1.5rem; }
@media (min-width: 56rem) {
    .split { grid-template-columns: 1fr 1.7fr; gap: 4rem; align-items: start; }
    .split .section-head { margin-bottom: 0; position: sticky; top: 6rem; }
}

/* ===== Inner-page header ===== */
.page-head { background: var(--band); border-bottom: 1px solid var(--line); padding: 2.5rem 0 2.75rem; }
.page-head h1 { max-width: 20em; margin-bottom: 0.5em; }
.page-head .lead { max-width: 40rem; font-size: 1.2rem; color: var(--muted); margin: 0; }
@media (min-width: 48rem) { .page-head { padding: 3.75rem 0 4rem; } }

/* Session detail: what we do, and what you leave with */
.steps-single li { grid-template-columns: 3.4rem 1fr; }
.steps .leave { margin: 0.7rem 0 0; font: 600 0.95rem/1.5 var(--sans); color: var(--ink); }
.steps .leave::before { content: "You leave with: "; color: var(--red); }
.stage-note { font-size: 1rem; color: var(--muted); margin-top: 0.75rem; }

/* Example blocks and before/after prompts */
.examples { display: grid; gap: 1.75rem; }
.examples > div { border-top: 1px solid #c9d4e3; padding-top: 1rem; }
.examples h3 { margin-bottom: 0.3rem; }
.examples p { margin: 0; color: var(--muted); }
@media (min-width: 48rem) { .examples { grid-template-columns: 1fr 1fr; gap: 2.25rem 3rem; } }

.compare { display: grid; gap: 1.5rem; }
.compare h3 { margin-bottom: 0.5rem; }
.prompt {
    margin: 0; padding: 1.1rem 1.25rem; background: var(--paper);
    border: 1px solid var(--line); border-left: 4px solid #9aa8bb; border-radius: var(--radius);
    font: 1rem/1.65 var(--sans); white-space: pre-wrap; overflow-wrap: anywhere;
}
.prompt.better { border-left-color: var(--red); }
.after-note { max-width: 44rem; margin-top: 1.75rem; }
@media (min-width: 48rem) { .compare { grid-template-columns: 1fr 1.6fr; gap: 2rem; align-items: start; } }

/* FAQ accordion: native <details>, no JavaScript needed */
.faq-list { border-bottom: 1px solid #c9d4e3; }
.faq { border-top: 1px solid #c9d4e3; }
.faq summary {
    cursor: pointer; list-style: none; position: relative;
    padding: 1.1rem 2.5rem 1.1rem 0; font: 700 1.05rem/1.4 var(--sans);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
    content: "+"; position: absolute; right: 0.25rem; top: 0.95rem;
    font: 700 1.5rem/1 var(--sans); color: var(--red);
}
.faq[open] summary::after { content: "\2212"; }
.faq summary:hover { text-decoration: underline; text-decoration-color: var(--red); text-underline-offset: 0.25em; }
.faq .answer { padding: 0 0 1.25rem; max-width: 40rem; }
.faq .answer p { margin: 0 0 0.8em; }
.faq .answer p:last-child { margin-bottom: 0; }

/* Contact: booking embed and message form */
.calendly { border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; background: var(--paper); }
.calendly iframe { display: block; width: 100%; height: 700px; border: 0; }
.embed-note { font-size: 1rem; color: var(--muted); margin: 1rem 0 0; }

.form { max-width: 36rem; }
.form .field { margin-bottom: 1.25rem; }
.form label { display: block; font: 700 0.95rem/1.4 var(--sans); margin-bottom: 0.35rem; }
.form input, .form select, .form textarea {
    width: 100%; font: 1rem/1.4 var(--sans); color: var(--ink); background: var(--paper);
    padding: 0.8rem 0.9rem; border: 1px solid #9aa8bb; border-radius: var(--radius);
}
.form textarea { min-height: 9rem; resize: vertical; }
.form input:focus, .form select:focus, .form textarea:focus { border-color: var(--ink); }
.form .hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-note { font-size: 0.975rem; color: var(--muted); margin: 0 0 1.25rem; }
.form-status { display: none; padding: 1rem 1.25rem; border-radius: var(--radius); margin-bottom: 1.25rem; font: 600 1rem/1.5 var(--sans); }
.form-status.show { display: block; }
.form-status.ok { background: #eaf6ec; border: 1px solid #9bcfa6; color: #14401f; }
.form-status.err { background: #fbeceb; border: 1px solid #e4a7a3; color: #6b1a14; }
.form button[disabled] { opacity: 0.6; cursor: wait; }

/* About: portrait beside the bio */
.about-grid { display: grid; gap: 2rem; }
.portrait { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); background: #e2ebf5; max-width: 22rem; width: 100%; }
.portrait img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; }
.about-text p { max-width: 40rem; }
@media (min-width: 48rem) { .about-grid { grid-template-columns: 1fr 1.7fr; gap: 3.5rem; align-items: start; } }

/* Free samples: downloadable cards on the audience pages */
.samples { display: grid; gap: 1.75rem; }
.sample { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); display: flex; flex-direction: column; overflow: hidden; }
.sample-img { aspect-ratio: 4 / 3; background: var(--band); border-bottom: 1px solid var(--line); }
.sample-img img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.sample-body { padding: 1.25rem 1.4rem 1.5rem; display: flex; flex-direction: column; flex: 1; }
.sample-tag { font: 700 0.8rem/1.3 var(--sans); letter-spacing: 0.07em; text-transform: uppercase; color: var(--red); margin: 0 0 0.4rem; }
.sample h3 { font-size: 1.3rem; margin-bottom: 0.4rem; }
.sample-body > p { color: var(--muted); margin-bottom: 0.7rem; }
.sample-meta { font: 500 0.9rem/1.5 var(--sans); color: var(--ink); }
.sample .cta-row { margin-top: auto; padding-top: 0.9rem; }
.btn-disabled { background: #eef1f5; color: #6b7589; border-color: #cfd6e2; box-shadow: none; cursor: not-allowed; }
.btn-disabled:hover { background: #eef1f5; color: #6b7589; }
.samples-note { margin: 1.75rem 0 0; max-width: 44rem; }
@media (min-width: 48rem) { .samples { grid-template-columns: 1fr 1fr; gap: 2rem; } }

/* Panels: used sparingly, for the two audiences and the price */
.panel-grid { display: grid; gap: 1.5rem; }
.panel { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.6rem 1.5rem; }
.panel h3 { margin-bottom: 0.4rem; }
.panel > p { color: var(--muted); }
@media (min-width: 48rem) { .panel-grid { grid-template-columns: 1fr 1fr; gap: 2rem; } .panel { padding: 2rem; } }

/* Red-pen ticks */
.ticks { list-style: none; margin: 0; padding: 0; }
.ticks li { position: relative; padding: 0.6rem 0 0.6rem 2.1rem; border-bottom: 1px solid var(--line); }
.ticks li:last-child { border-bottom: 0; }
.ticks li::before {
    content: "\2713"; position: absolute; left: 0; top: 0.55rem;
    font: 700 1.2rem/1.5 var(--sans); color: var(--red);
}
.ticks.compact li { padding: 0.35rem 0 0.35rem 1.9rem; border: 0; }
.ticks.compact li::before { top: 0.3rem; }

/* Numbered sequence: the sessions really are in order */
.steps { list-style: none; margin: 0; padding: 0; }
.steps li { display: grid; grid-template-columns: 5rem 1fr; gap: 0.75rem; padding: 1.35rem 0; border-bottom: 1px solid #c9d4e3; }
.steps li:first-child { border-top: 1px solid #c9d4e3; }
.steps .num {
    display: inline-flex; align-items: center; justify-content: center; align-self: start; justify-self: start;
    min-width: 2.5rem; height: 2.5rem; padding: 0 0.5rem;
    background: var(--hi); border-radius: var(--radius); font: 800 1rem var(--sans);
}
.steps h3 { margin-bottom: 0.25rem; }
.steps p { margin: 0; color: var(--muted); }

/* Price panel */
.price-panel { display: grid; gap: 1.5rem; align-items: center; padding: 2rem 1.5rem; }
.panel > p.price, .price { color: var(--ink); font: 800 clamp(3.4rem, 11vw, 5rem)/1 var(--sans); letter-spacing: -0.045em; margin: 0; }
.price small { display: block; font: 600 1rem/1.4 var(--sans); letter-spacing: 0; color: var(--muted); margin-top: 0.5rem; }
.price-panel .btn { margin-top: 1.1rem; }
@media (min-width: 48rem) {
    .price-panel { grid-template-columns: auto 1fr; gap: 4rem; padding: 2.75rem 3rem; }
}

/* Closing call to action */
.closing { background: var(--hi); padding: 3.75rem 0; }
.closing h2 { margin-bottom: 0.4rem; }
.closing p { max-width: 36rem; margin-bottom: 1.4rem; }

/* ===== Footer ===== */
.site-footer { background: var(--ink); color: #c4cedc; padding: 3rem 0 3.25rem; font-size: 1rem; }
.site-footer .container { display: grid; gap: 2rem; }
.site-footer h2 { font-size: 1.1rem; color: #fff; margin-bottom: 0.5rem; }
.site-footer p { margin: 0 0 0.3em; }
.site-footer a { color: #fff; text-decoration-color: rgba(255, 255, 255, 0.45); }
.site-footer a:hover { text-decoration-color: var(--hi); }
.footer-links { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.4rem 1.4rem; font-family: var(--sans); font-size: 0.95rem; }
.footer-copy { margin-top: 1.25rem !important; font-size: 0.9rem; color: #93a0b4; }
@media (min-width: 48rem) { .site-footer .container { grid-template-columns: 1.3fr 1fr; } }

/* Reserved for the later "teachers' mate" chatbot. Intentionally empty. */
#teachers-mate-slot { display: none; }

/* ===== Mobile booking bar: most visitors arrive on a phone ===== */
.mobile-cta {
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 90;
    background: var(--hi); border-top: 1px solid var(--hi-edge);
    box-shadow: 0 -6px 18px rgba(23, 32, 51, 0.12);
    padding: 0.7rem 1rem calc(0.7rem + env(safe-area-inset-bottom)); text-align: center;
}
.mobile-cta a { font: 700 1rem var(--sans); color: var(--ink); text-decoration: none; display: block; }
body.has-mobile-cta { padding-bottom: 4rem; }
@media (min-width: 48rem) {
    .mobile-cta { display: none; }
    body.has-mobile-cta { padding-bottom: 0; }
}

@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }
@media print { .site-header, .mobile-cta, .closing { display: none; } }