/* LockIn website. Same tokens as the app (see DESIGN.md): change one, change both. */
:root {
  --paper: #F3F5F9; --surface: #FFFFFF; --ink: #141830; --muted: #5A6079; --line: #DCE0EA; --soft: #E9EDF6;
  --pen: #2543D4; --pen-ink: #FFFFFF; --pen-soft: #E3E8FF; --marker: #F5E05A; --marker-ink: #1B1D10;
  --good: #17845A; --bad: #C73A45; --card-rule: #C9D6F2; --card-margin: #E46A72;
  --lock-bg: #0D1230; --lock-fg: #EEF1FF; --lock-muted: #A0A8D6; --lock-line: #2A3263; --lock-surface: #161C44;
  --f-display: "Big Shoulders Display", "Arial Narrow", "Roboto Condensed", system-ui, sans-serif;
  --f-body: "Atkinson Hyperlegible", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --r: 12px; --shadow: 0 1px 2px rgba(20,24,48,.06), 0 8px 22px -12px rgba(20,24,48,.3);
  --lift: 0 2px 4px rgba(20,24,48,.08), 0 24px 48px -24px rgba(20,24,48,.45);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 1.0625rem/1.6 var(--f-body); }
img { display: block; max-width: 100%; height: auto; }
a { color: var(--pen); }
h1, h2, h3 { margin: 0; font-family: var(--f-display); font-weight: 800; text-transform: uppercase; line-height: .95; letter-spacing: .005em; text-wrap: balance; }
h2 { font-size: clamp(2rem, 5.2vw, 3.1rem); }
p { margin: 0; }
.wrap { width: min(1120px, 100% - 32px); margin-inline: auto; }
.narrow { width: min(760px, 100% - 32px); }
.eyebrow { display: flex; align-items: center; gap: 8px; margin: 0 0 14px; font: 500 .74rem/1.2 var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.small, .fine { font-size: .9rem; color: var(--muted); }
.skip { position: absolute; left: -999px; top: 8px; z-index: 50; background: var(--marker); color: var(--marker-ink); padding: 8px 12px; border-radius: 8px; }
.skip:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--pen); outline-offset: 3px; border-radius: 6px; }
.hero :focus-visible, .nav :focus-visible, .end :focus-visible, .foot :focus-visible { outline-color: var(--marker); } /* yellow only shows up on navy */

/* buttons, as in the app */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 11px 18px; border-radius: 10px; border: 0; background: var(--pen); color: var(--pen-ink); font: 700 1rem/1 var(--f-body); text-decoration: none; cursor: pointer; transition: transform .15s ease, box-shadow .15s ease; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 16px -8px rgba(37,67,212,.7); }
.btn.small { min-height: 38px; padding: 8px 14px; font-size: .92rem; }
.btn.big { min-height: 54px; padding: 14px 24px; font-size: 1.08rem; }
.btn.ghost { background: transparent; color: inherit; border: 1px solid currentColor; }
.btn.ghost:hover { box-shadow: none; background: rgba(255,255,255,.06); }
.btn.marker { background: var(--marker); color: var(--marker-ink); }
.link { font-weight: 700; text-underline-offset: 3px; }

/* the logo: Pip and the wordmark with the highlighter swipe, like the app */
.logo { display: inline-flex; align-items: center; gap: 8px; color: inherit; text-decoration: none; }
.word { font: 800 1.55rem/1 var(--f-display); text-transform: uppercase; letter-spacing: .01em; }
.word .mark { background: linear-gradient(transparent 58%, var(--marker) 58% 92%, transparent 92%); color: inherit; }

/* nav */
.nav { position: sticky; top: 0; z-index: 20; background: rgba(13,18,48,.86); color: var(--lock-fg); backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--lock-line); }
.nav .word .mark { background: linear-gradient(transparent 58%, rgba(245,224,90,.55) 58% 92%, transparent 92%); }
.nav-in { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; }
.nav-links { display: flex; gap: 22px; }
.nav-links a { color: var(--lock-muted); text-decoration: none; font-weight: 700; font-size: .95rem; }
.nav-links a:hover { color: var(--lock-fg); }

/* hero: the lock screen at night, on faint ruled paper */
.hero { position: relative; overflow: hidden; background: var(--lock-bg); color: var(--lock-fg); padding: 72px 0 96px;
  background-image: repeating-linear-gradient(180deg, transparent 0 39px, rgba(160,168,214,.08) 39px 40px), radial-gradient(1200px 500px at 85% 10%, rgba(37,67,212,.35), transparent 60%); }
.hero::before { content: ""; position: absolute; top: 0; bottom: 0; left: max(16px, calc(50% - 600px)); width: 2px; background: rgba(228,106,114,.35); }
.hero-in { position: relative; display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.hero .eyebrow { color: var(--lock-muted); }
.hero h1 { font-size: clamp(3rem, 7.4vw, 5.6rem); }
.hl { color: var(--marker-ink); background: linear-gradient(100deg, transparent .1em, var(--marker) .1em calc(100% - .06em), transparent calc(100% - .06em)) 0 60% / 100% 78% no-repeat; padding: 0 .08em; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.hero .lede { margin-top: 24px; max-width: 34em; font-size: 1.15rem; color: var(--lock-muted); }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero .btn.big:first-child { background: var(--marker); color: var(--marker-ink); }
.hero .fine { margin-top: 16px; color: var(--lock-muted); }

/* the demo phone */
.demo { justify-self: center; width: min(330px, 100%); }
.phone { position: relative; aspect-ratio: 9 / 18.6; border-radius: 44px; padding: 11px; background: #05071a; box-shadow: 0 0 0 1px #2c3364, 0 40px 80px -30px rgba(0,0,0,.8), inset 0 0 0 2px #1b2148; transform: rotate(2deg); }
.ph-notch { position: absolute; top: 20px; left: 50%; width: 92px; height: 26px; transform: translateX(-50%); border-radius: 14px; background: #05071a; z-index: 2; }
.ph-screen { position: relative; height: 100%; overflow: hidden; border-radius: 34px; padding: 54px 16px 16px; background: linear-gradient(180deg, #232c74, #0d1230 62%); display: flex; flex-direction: column; gap: 14px; }
.ph-time { position: absolute; top: 14px; left: 30px; font: 600 .9rem/1 var(--f-body); color: #fff; }
.ph-clock { text-align: center; color: #fff; margin: -6px 0 2px; }
.ph-clock span { display: block; font: 600 .82rem/1 var(--f-body); opacity: .8; }
.ph-clock b { display: block; font: 800 4.4rem/.9 var(--f-display); letter-spacing: .01em; }
.ph-note { display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; border-radius: 16px; background: rgba(238,241,255,.92); color: var(--ink); font-size: .84rem; line-height: 1.35; box-shadow: 0 8px 20px -10px rgba(0,0,0,.6); transition: background .3s ease; }
.ph-note img { border-radius: 6px; flex: none; }
.ph-note b { display: block; font-size: .78rem; }
.phone.unlocked .ph-note { background: #e8f8ef; }
.ph-apps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px 14px; padding: 2px 8px; }
.app { position: relative; aspect-ratio: 1; border-radius: 13px; transition: transform .5s cubic-bezier(.2,1.6,.4,1); }
.app::after { content: ""; position: absolute; inset: 0; border-radius: inherit; background: rgba(10,14,40,.66); transition: opacity .5s ease; }
.app.call::after { display: none; }
.a5 { background: linear-gradient(135deg, #f7971e, #ffd200); } .a6 { background: linear-gradient(135deg, #00c6ff, #0072ff); } .a7 { background: linear-gradient(135deg, #ee0979, #ff6a00); }
/* the phone app is never locked: calls always work */
.app.call { background: #30d158 url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M6.6 10.8a15.1 15.1 0 0 0 6.6 6.6l2.2-2.2c.3-.3.7-.4 1-.2 1.1.4 2.3.6 3.6.6.6 0 1 .4 1 1V20c0 .6-.4 1-1 1A17 17 0 0 1 3 4c0-.6.4-1 1-1h3.5c.6 0 1 .4 1 1 0 1.3.2 2.5.6 3.6.1.3 0 .7-.2 1z'/%3E%3C/svg%3E") center / 52% no-repeat; }
.a1 { background: linear-gradient(135deg, #ff5f6d, #ffc371); } .a2 { background: linear-gradient(135deg, #7f5af0, #2cb1bc); } .a3 { background: linear-gradient(135deg, #ff3d3d, #b31217); } .a4 { background: linear-gradient(135deg, #38ef7d, #11998e); }
.app i { position: absolute; z-index: 1; right: -5px; bottom: -5px; width: 20px; height: 20px; border-radius: 50%; background: var(--marker) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231B1D10' stroke-width='2.6' stroke-linecap='round'%3E%3Crect x='6' y='11' width='12' height='9' rx='2'/%3E%3Cpath d='M9 11V8a3 3 0 0 1 6 0v3'/%3E%3C/svg%3E") center / 13px no-repeat; transition: transform .35s ease, opacity .35s ease; }
.phone.unlocked .app { transform: scale(1.04); }
.phone.unlocked .app::after { opacity: 0; }
.phone.unlocked .app i { transform: scale(0) rotate(-40deg); opacity: 0; }
.ph-quest { margin-top: auto; background: var(--surface); color: var(--ink); border-radius: 18px; padding: 14px 12px 8px;
  background-image: linear-gradient(90deg, transparent 26px, var(--card-margin) 26px 27px, transparent 27px); }
.ph-q-head { margin: 0 0 6px 36px; font: 500 .66rem/1 var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.ph-quest ul { list-style: none; margin: 0; padding: 0; }
.ph-quest button { position: relative; width: 100%; min-height: 44px; padding: 8px 6px 8px 36px; border: 0; border-top: 1px solid var(--card-rule); background: none; color: inherit; text-align: left; font: 700 .86rem/1.25 var(--f-body); cursor: pointer; }
.ph-quest button::before { content: ""; position: absolute; left: 6px; top: 50%; width: 20px; height: 20px; margin-top: -10px; border-radius: 50%; border: 2px solid var(--line); background: var(--surface); transition: all .2s ease; }
.ph-quest button[aria-pressed="true"] { color: var(--muted); }
.ph-quest button[aria-pressed="true"] span { background: linear-gradient(transparent 54%, rgba(245,224,90,.85) 54% 90%, transparent 90%); }
.ph-quest button[aria-pressed="true"]::before { border-color: var(--good); background: var(--good) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12.5l4.5 4.5L19 7.5'/%3E%3C/svg%3E") center / 13px no-repeat; }
.ph-pip { position: absolute; right: 12px; bottom: 156px; width: 46px; opacity: 0; transform: translateY(20px) rotate(8deg); transition: opacity .3s ease, transform .5s cubic-bezier(.2,1.8,.4,1); pointer-events: none; }
.phone.unlocked .ph-pip { opacity: 1; transform: translateY(-6px) rotate(-6deg); }
.demo-hint { margin-top: 18px; text-align: center; font: 500 .8rem/1.3 var(--f-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--lock-muted); }

/* ruled index cards */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); box-shadow: var(--shadow); }
.ruled { position: relative; background-image: linear-gradient(90deg, transparent 0 64px, var(--card-margin) 64px 66px, transparent 66px), repeating-linear-gradient(180deg, transparent 0 31px, var(--card-rule) 31px 32px); background-color: var(--surface); }

/* how a day goes */
.day { padding: 96px 0 72px; }
.day h2 { margin-bottom: 28px; }
.day .timeline { max-width: 900px; }
/* text sits on the card's rules: every line is one 32px rule, and the padding is a whole rule */
.timeline { list-style: none; margin: 0; padding: 32px 26px 32px 0; }
.timeline li { display: grid; grid-template-columns: 64px 1fr; gap: 20px; align-items: baseline; }
.timeline li + li { margin-top: 32px; }
.timeline time { text-align: right; white-space: nowrap; font: 600 .74rem/32px var(--f-mono); color: var(--card-margin); padding-right: 8px; }
.timeline p { font-size: 1.1rem; line-height: 32px; }

/* features */
.features { padding: 24px 0 64px; }
.feat { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; padding: 56px 0; }
.feat + .feat { border-top: 1px dashed var(--line); }
.feat.flip .feat-copy { order: 2; }
.feat-copy h2 { margin-bottom: 18px; }
.feat-copy p + p { margin-top: 12px; }
.feat-copy > p:not(.eyebrow):not(.small) { font-size: 1.1rem; max-width: 32em; }
.shot { margin: 0; justify-self: center; width: min(400px, 100%); }
.shot img { border-radius: 16px; box-shadow: var(--lift); background: var(--surface); }
.shot.dark img { background: var(--lock-bg); }
.shot figcaption { margin-top: 14px; text-align: center; font: 500 .74rem/1.3 var(--f-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.tilt-l img { transform: rotate(-1.6deg); } .tilt-r img { transform: rotate(1.4deg); }

/* parents, teachers */
.who { padding: 96px 0; background: var(--surface); border-top: 1px solid var(--line); }
.who.alt { background: var(--paper); }
.who-in { display: grid; grid-template-columns: 1.2fr .8fr; gap: 64px; align-items: center; }
.who h2 { margin-bottom: 22px; }
.ticks { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.ticks li { position: relative; padding-left: 34px; font-size: 1.08rem; }
.ticks li::before { content: ""; position: absolute; left: 0; top: .2em; width: 22px; height: 22px; border-radius: 50%; background: var(--pen) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12.5l4.5 4.5L19 7.5'/%3E%3C/svg%3E") center / 13px no-repeat; }
.note { margin-top: 24px; padding: 14px 16px; border-radius: 10px; background: var(--soft); color: var(--muted); font-size: .95rem; }
.phone-shot { margin: 0; justify-self: center; width: min(300px, 100%); padding: 9px; border-radius: 40px; background: #05071a; box-shadow: var(--lift); }
.phone-shot img { border-radius: 32px; }

/* privacy */
.privacy { padding: 88px 0; }
.privacy-card { padding: 32px 34px 32px 92px; max-width: 760px; }
.privacy-card h2 { margin-bottom: 0; font-size: clamp(1.8rem, 4.4vw, 2.6rem); line-height: 64px; }
.privacy-card p { font-size: 1.1rem; line-height: 32px; }
.privacy-card .link { display: inline-block; line-height: 32px; }

/* questions */
.faq { padding: 24px 0 96px; }
.faq h2 { margin-bottom: 22px; }
details { border-top: 1px solid var(--line); }
details:last-of-type { border-bottom: 1px solid var(--line); }
summary { list-style: none; cursor: pointer; padding: 18px 40px 18px 0; position: relative; font-weight: 700; font-size: 1.1rem; }
summary::-webkit-details-marker { display: none; }
summary::after { content: ""; position: absolute; right: 6px; top: 50%; width: 12px; height: 12px; margin-top: -8px; border-right: 2.5px solid var(--pen); border-bottom: 2.5px solid var(--pen); transform: rotate(45deg); transition: transform .2s ease; }
details[open] summary::after { transform: rotate(225deg); margin-top: -2px; }
details p { padding: 0 0 20px; color: var(--muted); max-width: 40em; }

/* the end */
.end { background: var(--lock-bg); color: var(--lock-fg); padding: 96px 0; text-align: center; background-image: radial-gradient(700px 300px at 50% 0%, rgba(37,67,212,.4), transparent 70%); }
.end-in { display: flex; flex-direction: column; align-items: center; gap: 24px; }
.end h2 { font-size: clamp(2.4rem, 6vw, 4rem); }
.foot { background: #080b22; color: var(--lock-muted); padding: 28px 0; font-size: .9rem; }
.foot-in { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; }
.foot .logo { color: var(--lock-fg); } .foot .word { font-size: 1.2rem; }
.foot nav { display: flex; gap: 18px; } .foot a { color: var(--lock-muted); }

/* entrances */
[data-delay] { --d: .15s; }
.lost { min-height: 100vh; display: grid; place-items: center; }
.js [data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity .6s ease var(--d, 0s), transform .6s cubic-bezier(.2,.8,.2,1) var(--d, 0s); }
.js [data-reveal].seen { opacity: 1; transform: none; }

@media (max-width: 880px) {
  .nav-links { display: none; }
  .hero { padding: 48px 0 72px; }
  .hero::before { left: 6px; }
  .hero-in, .feat, .who-in { grid-template-columns: 1fr; gap: 40px; }
  .feat.flip .feat-copy { order: 0; }
  .feat { padding: 44px 0; }
  .demo { width: min(300px, 86%); }
  .day, .who, .privacy, .end { padding: 64px 0; }
  .timeline { padding-right: 14px; } .timeline li { grid-template-columns: 56px 1fr; gap: 12px; } .timeline time { font-size: .66rem; padding-right: 4px; } .timeline p { font-size: 1.02rem; } .ruled { background-image: linear-gradient(90deg, transparent 0 56px, var(--card-margin) 56px 58px, transparent 58px), repeating-linear-gradient(180deg, transparent 0 31px, var(--card-rule) 31px 32px); }
  .privacy-card { padding: 26px 20px 26px 70px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}