@charset "UTF-8";
@import url("https://fonts.googleapis.com/css2?family=Lexend:wght@300..900&display=swap");
:root {
  --ink: #132343;
  --ink-2: #293d5e;
  --muted: #60718a;
  --line: #e0e7f0;
  --canvas: #f7f9fc;
  --white: #fff;
  --blue: #315de7;
  --blue-dark: #204bd0;
  --pale-blue: #eff4ff;
  --radius: 18px;
  color-scheme: light;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body { margin: 0; font-family: "Lexend", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif; background: var(--canvas); color: var(--ink); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button:not(:disabled) { cursor: pointer; }
:focus-visible { outline: 3px solid #93b4ff; outline-offset: 3px; }
[hidden] { display: none !important; }
.shell { max-width: 1216px; margin: 0 auto; padding-left: 32px; padding-right: 32px; }
.site-header { height: 78px; position: sticky; z-index: 50; top: 0; background: rgba(255,255,255,.95); border-bottom: 1px solid rgba(21,43,77,.09); backdrop-filter: blur(18px); }
.header-inner { height: 100%; display: flex; gap: 34px; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-size: 16px; font-weight: 830; letter-spacing: -.6px; line-height: 1; white-space: nowrap; }
.brand-light { font-weight: 450; }
.brand small { display: block; margin-top: 6px; font-size: 9px; letter-spacing: 2.3px; color: #60728f; font-weight: 700; }
.brand-symbol { display: flex; align-items: center; justify-content: center; height: 39px; width: 39px; border-radius: 12px; background: var(--blue); gap: 3px; box-shadow: 0 6px 12px rgba(49,93,231,.18); }
.brand-symbol i { display: block; width: 5px; height: 15px; background: white; border-radius: 2px; transform: rotate(34deg); }
.brand-symbol i:nth-child(2) { height: 22px; }
.brand-symbol i:nth-child(3) { height: 10px; }
.top-nav { display: flex; align-items: center; gap: 29px; margin-left: auto; }
.top-nav a, .header-link { text-decoration: none; font-size: 13px; font-weight: 680; color: #475a77; transition: color .2s; }
.top-nav a:hover, .header-link:hover { color: var(--blue); }
.header-link { display: inline-flex; align-items: center; gap: 14px; border: 1px solid #dbe4f3; color: #1b365e; padding: 12px 16px; border-radius: 11px; white-space: nowrap; }
.header-link:hover { border-color: #9cb8ff; background: var(--pale-blue); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 14px; min-height: 48px; padding: 13px 19px; border-radius: 11px; font-size: 13px; font-weight: 730; text-decoration: none; border: 1px solid transparent; transition: transform .18s, background .18s, border-color .18s, box-shadow .18s; white-space: nowrap; }
.btn:hover:not(:disabled) { transform: translateY(-2px); }
.btn:disabled { opacity: .45; cursor: default; }
.btn-primary { color: white; background: var(--blue); box-shadow: 0 7px 20px rgba(40,78,202,.19); }
.btn-primary:hover { background: var(--blue-dark); box-shadow: 0 10px 26px rgba(40,78,202,.25); }
.btn-quiet { color: #253c5b; background: transparent; }
.btn-quiet:hover { color: var(--blue); background: #edf2fb; }
.btn-outline-light { color: white; border-color: rgba(255,255,255,.28); background: rgba(255,255,255,.09); }
.btn-outline-light:hover { background: rgba(255,255,255,.16); }
.hero { display: grid; grid-template-columns: minmax(0,1.05fr) minmax(0,.95fr); align-items: center; gap: 65px; padding-top: 87px; padding-bottom: 75px; }
.eyebrow, .section-kicker { display: inline-flex; gap: 10px; align-items: center; font-size: 11px; font-weight: 800; color: var(--blue); letter-spacing: 1.8px; }
.status-dot { width: 8px; height: 8px; background: #2cb692; border-radius: 50%; box-shadow: 0 0 0 4px #e4f7f0; }
.hero h1 { font-size: clamp(42px,4.85vw,68px); line-height: 1.11; letter-spacing: -.052em; margin: 25px 0; font-weight: 800; max-width: 710px; }
.hero h1 em { color: var(--blue); font-style: normal; }
.hero-intro { color: #596b86; font-size: 17px; line-height: 1.8; max-width: 530px; margin: 0; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 32px; }
.micro-copy { margin-top: 20px; color: #71809a; font-size: 12px; }
.hero-preview { background: #142744; color: #fff; border-radius: 22px; padding: 29px 31px; min-height: 435px; box-shadow: 0 24px 55px rgba(25,51,92,.18); position: relative; overflow: hidden; }
.hero-preview::before { content: ""; pointer-events: none; position: absolute; top: -130px; right: -100px; width: 320px; height: 320px; background: radial-gradient(circle,rgba(84,128,255,.32),transparent 70%); }
.hero-preview::after { content: ""; pointer-events: none; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px); background-size: 33px 33px; mask-image: linear-gradient(to right,transparent 20%,black); }
.hero-preview > * { position: relative; z-index: 2; }
.preview-top { display: flex; justify-content: space-between; gap: 8px; align-items: center; }
.preview-label { font-size: 10px; letter-spacing: 2px; color: #9baecc; font-weight: 750; }
.preview-signal { font-size: 9px; color: #7ee6bf; letter-spacing: .9px; font-weight: 700; display: flex; align-items: center; gap: 7px; }
.preview-signal span { background: #7ee6bf; height: 5px; width: 5px; border-radius: 50%; }
.preview-heading { display: flex; align-items: center; gap: 15px; margin: 31px 0 24px; }
.preview-heading > div { display: flex; flex-direction: column; gap: 5px; }
.preview-heading strong { font-size: 24px; letter-spacing: -.7px; }
.preview-heading span:not(.preview-icon) { color: #99b0d2; font-size: 12px; }
.preview-icon { display: flex; height: 47px; width: 47px; align-items: center; justify-content: center; background: #315de7; border-radius: 13px; font-size: 28px; }
.preview-step { display: grid; grid-template-columns: 39px 1fr 22px; gap: 14px; align-items: center; padding: 13px 14px; background: rgba(255,255,255,.075); border: 1px solid rgba(231,239,255,.11); border-radius: 11px; }
.preview-step > div { display: flex; flex-direction: column; gap: 4px; }
.preview-rail { font-size: 11px; color: #95b9ff; font-weight: 700; }
.preview-step small { color: #7da0d3; font-size: 9px; letter-spacing: 1.5px; font-weight: 850; }
.preview-step strong { font-size: 14px; }
.preview-step div span { font-size: 11px; color: #a7b6cc; }
.preview-check { display: flex; width: 22px; height: 22px; border-radius: 50%; align-items: center; justify-content: center; background: rgba(91,216,164,.17); color: #72ddb4; }
.preview-connector { height: 20px; width: 2px; background: linear-gradient(#345d8b,#4d8dcb); margin-left: 33px; }
.preview-footer { display: flex; justify-content: space-between; margin-top: 21px; font-size: 11px; color: #9aacca; }
.dots { color: #93b4ff; letter-spacing: 4px; }
.strip { display: grid; grid-template-columns: repeat(4,1fr); align-items: center; background: #fff; border: 1px solid var(--line); border-radius: 15px; padding-top: 22px; padding-bottom: 22px; }
.strip > span { font-size: 24px; font-weight: 800; letter-spacing: -.6px; border-right: 1px solid var(--line); padding: 0 10px 0 28px; }
.strip > span:last-child { border-right: none; }
.strip small { display: block; font-size: 10px; font-weight: 800; letter-spacing: 1px; color: #7d8da4; margin-top: 3px; }
.section { padding-top: 98px; padding-bottom: 5px; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 28px; }
.section-heading h2 { margin: 12px 0 10px; font-size: clamp(28px,3.3vw,41px); letter-spacing: -.04em; line-height: 1.17; }
.section-heading p { font-size: 15px; line-height: 1.75; color: var(--muted); max-width: 610px; margin: 0; }
.section-count { color: #95a2b4; letter-spacing: 1px; font-weight: 760; }
.guide-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; }
.guide-card { display: flex; flex-direction: column; background: #fff; border: 1px solid #e2e8f1; border-radius: 17px; padding: 25px 25px 23px; min-height: 352px; transition: transform .2s, box-shadow .2s, border-color .2s; }
.guide-card:hover { transform: translateY(-5px); box-shadow: 0 19px 50px rgba(22,56,106,.1); border-color: #c9d6ed; }
.card-top { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.module-number { width: 54px; height: 54px; display: inline-flex; justify-content: center; align-items: center; background: #eaf0ff; border-radius: 13px; color: #315de7; font-size: 19px; font-weight: 850; }
.guide-violet .module-number { background: #f1ecff; color: #7454b8; }
.guide-amber .module-number { background: #fff3de; color: #b8751d; }
.guide-type { font-size: 10px; font-weight: 720; color: #8998ad; text-align: right; }
.guide-card h3 { font-size: 24px; letter-spacing: -.7px; margin: 27px 0 10px; }
.guide-card p { font-size: 13px; color: var(--muted); line-height: 1.75; margin: 0 0 24px; }
.mini-flow { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-top: auto; min-height: 40px; }
.mini-flow span { padding: 6px 7px; background: #f2f5f9; border-radius: 6px; color: #6d7c91; font-size: 10px; }
.mini-flow b { color: #a6b0c2; font-size: 11px; }
.card-bottom { display: flex; justify-content: space-between; border-top: 1px solid #e8ecf3; padding-top: 21px; margin-top: 21px; gap: 8px; align-items: center; }
.card-bottom span { color: #72819b; font-size: 11px; font-weight: 650; }
.card-bottom a { font-size: 13px; color: var(--blue); font-weight: 780; text-decoration: none; }
.card-bottom a:hover { text-decoration: underline; }
.small-dot { margin: 0 5px; }
.card-progress { display: flex; align-items: center; gap: 10px; margin-top: 16px; font-size: 10px; color: #60728b; }
.tiny-track { flex: 1; height: 4px; background: #edf1f9; border-radius: 4px; overflow: hidden; }
.tiny-track > div { height: 100%; width: 0; background: #3a67e7; transition: width .2s; }
.how-section { padding-bottom: 85px; }
.how-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.how-grid > div { border-top: 2px solid #d9e4f1; padding-top: 23px; }
.how-num { color: #315de7; font-size: 12px; font-weight: 800; }
.how-grid h3 { font-size: 20px; letter-spacing: -.5px; margin: 22px 0 10px; }
.how-grid p { margin: 0; line-height: 1.75; font-size: 13px; color: #657691; max-width: 335px; }
.cta-section { margin-top: 22px; margin-bottom: 0; border-radius: 23px; min-height: 334px; background: #152e52; color: white; position: relative; padding-top: 50px; padding-bottom: 48px; overflow: hidden; }
.cta-section .section-kicker, .lesson-affiliate .section-kicker { color: #92baff; }
.cta-content { position: relative; z-index: 2; max-width: 690px; }
.cta-section h2 { font-size: clamp(29px,3.4vw,46px); letter-spacing: -.05em; line-height: 1.15; margin: 14px 0; }
.cta-section p { color: #b4c4db; line-height: 1.7; font-size: 14px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 23px; }
.disclosure-on-dark { max-width: 640px; font-size: 11px !important; color: #a8b8d1 !important; }
.cta-mark { position: absolute; right: 90px; bottom: -140px; width: 350px; height: 350px; border-radius: 50%; background: linear-gradient(130deg,rgba(90,149,255,.24),rgba(90,149,255,.03)); display: grid; place-items: center; font-size: 190px; color: rgba(255,255,255,.08); }
.faq-section { padding-top: 92px; padding-bottom: 100px; }
.faq-list { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; }
.faq-list details { padding: 23px; border: 1px solid var(--line); border-radius: 14px; background: white; }
.faq-list summary { font-size: 15px; font-weight: 750; cursor: pointer; line-height: 1.5; }
.faq-list p { color: var(--muted); font-size: 13px; line-height: 1.75; }
.site-footer { background: white; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 60px; padding-top: 55px; padding-bottom: 42px; }
.footer-brand { font-weight: 840; letter-spacing: -.5px; text-decoration: none; font-size: 19px; }
.footer-grid p { max-width: 530px; color: #6b7a91; font-size: 12px; line-height: 1.7; }
.footer-grid .footer-disclosure { font-size: 11px; color: #8390a5; }
.footer-links { display: flex; flex-direction: column; align-items: flex-start; gap: 16px; }
.footer-links a { text-decoration: none; color: #465974; font-size: 12px; font-weight: 650; }
.footer-links a:hover { color: var(--blue); }
.footer-bottom { border-top: 1px solid #edf0f4; display: flex; justify-content: space-between; padding-top: 23px; padding-bottom: 23px; gap: 15px; font-size: 11px; color: #8897aa; }
/* Lesson pages */
.lesson-shell { padding-bottom: 90px; }
.breadcrumbs { display: flex; gap: 10px; align-items: center; padding: 30px 0; color: #8594a7; font-size: 12px; }
.breadcrumbs a { text-decoration: none; color: #657994; }
.breadcrumbs a:hover { color: var(--blue); }
.breadcrumbs strong { font-weight: 700; color: #233a5e; }
.lesson-intro { display: flex; align-items: center; justify-content: space-between; background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 40px 45px; gap: 30px; margin-bottom: 22px; }
.lesson-intro h1 { font-size: clamp(29px,3.4vw,44px); letter-spacing: -.045em; max-width: 760px; line-height: 1.16; margin: 13px 0; }
.lesson-intro p { color: var(--muted); font-size: 14px; line-height: 1.8; max-width: 710px; margin: 0 0 20px; }
.lesson-meta { display: flex; gap: 10px; flex-wrap: wrap; }
.lesson-meta > span { padding: 7px 11px; border-radius: 8px; background: #f2f5f9; font-size: 11px; font-weight: 700; color: #687b95; }
.intro-deco { flex: 0 0 122px; width: 122px; height: 122px; border-radius: 24px; display: grid; place-items: center; background: #eff3ff; color: #7599ef; font-weight: 850; font-size: 61px; letter-spacing: -4px; transform: rotate(-6deg); }
.deco-violet { background: #f2ecff; color: #b39bdc; }
.deco-amber { background: #fff5e6; color: #d9ab64; }
.lesson-main { display: grid; grid-template-columns: 285px minmax(0,1fr); gap: 24px; align-items: start; }
.lesson-sidebar { min-width: 0; position: sticky; top: 98px; align-self: start; z-index: 20; }
.sidebar-sticky { position: static; max-height: calc(100dvh - 112px); overflow-y: auto; overscroll-behavior: contain; background: white; padding: 22px 19px; border-radius: 17px; border: 1px solid var(--line); }
.sidebar-head, .progress-label { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.sidebar-head strong { font-size: 14px; }
.reset-progress { border: none; padding: 4px 0; background: transparent; color: #8491a7; font-size: 11px; text-decoration: underline; }
.reset-progress:hover { color: var(--blue); }
.progress-track { margin: 18px 0 10px; background: #ecf1f8; height: 7px; border-radius: 8px; overflow: hidden; }
.progress-track > span { display: block; height: 100%; width: 0%; background: var(--blue); border-radius: 8px; transition: width .2s; }
.progress-label { margin-bottom: 26px; color: #60728d; font-size: 11px; }
.progress-label strong { font-weight: 700; }
.step-index { display: flex; flex-direction: column; gap: 5px; }
.step-jump { width: 100%; border: 1px solid transparent; border-radius: 9px; padding: 10px 8px; text-align: left; background: transparent; display: flex; align-items: center; gap: 11px; color: #647590; font-size: 12px; line-height: 1.35; }
.step-jump:hover { background: #f3f6fc; }
.step-jump.active { background: #eef3ff; color: #234cce; border-color: #dce7ff; font-weight: 730; }
.jump-count { flex: 0 0 27px; width: 27px; height: 27px; display: inline-grid; place-items: center; background: #edf1f6; border-radius: 8px; color: #8394a9; font-size: 10px; font-weight: 810; }
.step-jump.active .jump-count { background: #d8e4ff; color: #315de7; }
.step-jump > span:nth-child(2) { flex: 1; }
.jump-check { opacity: 0; color: #248f6e; font-weight: 850; }
.step-jump.done .jump-check { opacity: 1; }
.sidebar-other { display: flex; flex-direction: column; gap: 6px; padding-top: 24px; margin-top: 24px; border-top: 1px solid var(--line); }
.sidebar-other > span { font-size: 10px; font-weight: 830; letter-spacing: 1.2px; color: #92a0b4; margin-bottom: 5px; }
.sidebar-guide { padding: 11px 5px; display: flex; align-items: center; gap: 10px; font-size: 11px; font-weight: 650; color: #4c6282; text-decoration: none; border-radius: 7px; }
.sidebar-guide:hover { background: #f5f8fd; color: #2b55d6; }
.sidebar-module { background: #edf2fa; border-radius: 7px; color: #6a82ac; font-weight: 850; padding: 6px; }
.sidebar-percent { margin-left: auto; color: #2e8b70; font-size: 10px; }
.lesson-body { min-width: 0; }
.workflow-card, .preflight, .step-panel, .lesson-references { background: white; border: 1px solid var(--line); border-radius: 17px; }
.workflow-card { padding: 27px 32px; margin-bottom: 16px; }
.workflow-card-top { display: flex; justify-content: space-between; gap: 12px; align-items: center; }
.workflow-card h2 { font-size: 20px; letter-spacing: -.6px; margin: 9px 0 0; }
.workflow-pill { background: #eaf3ff; color: #5379b3; border-radius: 7px; font-size: 9px; letter-spacing: 1.3px; font-weight: 810; padding: 8px; white-space: nowrap; }
.flow-nodes { display: flex; gap: 8px; align-items: center; margin: 23px 0 20px; flex-wrap: wrap; }
.flow-node { background: #f1f5fc; border: 1px solid #dfebf9; padding: 11px 13px; border-radius: 9px; font-size: 11px; font-weight: 720; color: #2e4a76; }
.flow-arrow { color: #95a6bd; }
.workflow-card > p { color: var(--muted); font-size: 12px; line-height: 1.65; margin: 0; }
.workflow-card > p strong { color: #253c5b; }
.preflight { margin-bottom: 16px; padding: 21px 32px; }
.preflight summary { cursor: pointer; font-weight: 760; font-size: 13px; display: flex; justify-content: space-between; }
.preflight summary::marker { content: ""; }
.preflight summary::-webkit-details-marker { display: none; }
.preflight ul { color: #536782; padding-left: 19px; font-size: 12px; line-height: 1.8; margin: 17px 0 6px; }
.preflight p { color: #8997a9; font-size: 11px; margin: 8px 0 0; }
.step-panel { padding: 35px 35px 30px; margin-bottom: 17px; }
body.js-ready .step-panel:not(.active) { display: none; }
.step-label { display: flex; justify-content: space-between; gap: 12px; color: #7186a7; font-size: 10px; font-weight: 820; letter-spacing: 1.4px; }
.step-label > span:first-child { color: var(--blue); }
.step-panel h2 { font-size: clamp(25px,2.7vw,35px); letter-spacing: -.042em; line-height: 1.2; margin: 14px 0 10px; }
.step-goal { color: var(--muted); font-size: 14px; line-height: 1.75; margin: 0 0 31px; }
.instruction-heading { display: flex; align-items: center; gap: 10px; }
.instruction-heading h3 { font-size: 14px; margin: 0; }
.instruction-icon { width: 27px; height: 27px; border-radius: 50%; color: #2f78b2; background: #e9f3ff; display: inline-grid; place-items: center; font-weight: 830; }
.action-list { counter-reset: actions; display: grid; gap: 17px; padding-left: 0; margin: 20px 0 30px; list-style: none; }
.action-list li { counter-increment: actions; display: flex; gap: 14px; align-items: flex-start; font-size: 13px; color: #415572; line-height: 1.7; }
.action-list li::before { content: counter(actions); display: grid; flex: 0 0 26px; place-items: center; height: 26px; border-radius: 7px; background: #f0f4fa; color: #607798; font-size: 11px; font-weight: 800; }
.example-box { border: 1px solid #e1e8f3; border-radius: 12px; overflow: hidden; margin: 18px 0; }
.example-head { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; background: #f4f7fc; border-bottom: 1px solid #e3e9f2; }
.example-head strong { font-size: 11px; color: #526884; }
.copy-btn { display: inline-flex; align-items: center; gap: 8px; background: white; border: 1px solid #d9e4f3; color: #3b5e9c; border-radius: 7px; padding: 7px 10px; font-size: 11px; font-weight: 730; }
.copy-btn:hover { border-color: #789bed; background: #edf4ff; }
.example-box pre { white-space: pre-wrap; overflow-wrap: anywhere; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; line-height: 1.7; color: #345072; font-size: 12px; padding: 17px 18px; margin: 0; background: white; }
.verify-box { background: #edf8f5; border: 1px solid #d5eee6; border-radius: 12px; display: flex; gap: 12px; padding: 18px; }
.verify-mark { background: #23977d; color: white; flex: 0 0 25px; height: 25px; width: 25px; display: grid; place-items: center; border-radius: 50%; font-weight: 800; }
.verify-box strong { font-size: 12px; color: #226853; }
.verify-box p { font-size: 12px; line-height: 1.7; margin: 5px 0 0; color: #477466; }
.tip-box { font-size: 12px; line-height: 1.8; color: #6e7f94; margin: 17px 0; }
.tip-box strong { color: #445c7a; }
.step-resources { display: flex; align-items: center; gap: 8px 14px; flex-wrap: wrap; margin: 18px 0; font-size: 11px; }
.step-resources strong { color: #687c97; }
.step-resources a, .lesson-references a { color: #315de7; text-decoration: none; }
.step-resources a:hover, .lesson-references a:hover { text-decoration: underline; }
.complete-check { display: flex; align-items: center; gap: 12px; border: 1px solid #dbe5f4; background: #f7faff; border-radius: 12px; padding: 16px; cursor: pointer; margin-top: 28px; }
.complete-check:has(input:checked) { background: #edf8f5; border-color: #b9e4d6; }
.complete-check input { width: 19px; height: 19px; accent-color: #208869; }
.complete-check span { display: flex; flex-direction: column; gap: 5px; }
.complete-check strong { font-size: 12px; color: #314b6b; }
.complete-check small { font-size: 11px; color: #8494a9; }
.step-controls { display: flex; justify-content: space-between; align-items: center; margin-top: 28px; gap: 12px; }
.finish-panel { display: flex; gap: 17px; background: #e9f8f3; border: 1px solid #b9e6d8; border-radius: 16px; padding: 23px; margin-bottom: 18px; align-items: flex-start; }
.finish-icon { width: 36px; height: 36px; border-radius: 50%; background: #23977d; color: white; display: grid; place-items: center; font-size: 18px; flex-shrink: 0; }
.finish-panel h3 { margin: 0 0 5px; font-size: 16px; }
.finish-panel p { font-size: 12px; line-height: 1.7; margin: 0; color: #52746a; }
.lesson-affiliate { display: flex; justify-content: space-between; align-items: center; gap: 22px; padding: 30px 32px; background: #152e52; color: white; border-radius: 17px; }
.lesson-affiliate h2 { margin: 9px 0; font-size: 25px; line-height: 1.2; letter-spacing: -.5px; }
.lesson-affiliate p { color: #bfcee0; font-size: 12px; line-height: 1.7; }
.lesson-affiliate small { display: block; font-size: 10px; line-height: 1.7; color: #aec1d9; max-width: 520px; }
.lesson-affiliate .btn { flex-shrink: 0; }
.lesson-references { padding: 22px 28px; margin-top: 18px; }
.lesson-references strong { font-size: 12px; }
.lesson-references ul { margin: 10px 0 0; padding-left: 18px; font-size: 12px; line-height: 1.9; }
.simple-page { padding-top: 90px; padding-bottom: 125px; max-width: 1000px; }
.simple-page h1 { font-size: clamp(40px,5.3vw,64px); letter-spacing: -.055em; line-height: 1.12; margin: 18px 0; }
.simple-page .lead { font-size: 18px; line-height: 1.8; color: #61728b; max-width: 700px; }
.article-content { margin-top: 50px; max-width: 760px; font-size: 14px; color: #556a87; line-height: 1.85; }
.article-content h2 { color: var(--ink); font-size: 22px; margin-top: 34px; margin-bottom: 9px; letter-spacing: -.6px; }
.article-content a.btn { margin-top: 20px; }
.article-content code { background: #eaf0fa; color: #274f9c; padding: 2px 5px; border-radius: 5px; overflow-wrap: anywhere; }
.meta-note { font-size: 12px; color: #8292a8; }
.not-found { min-height: 58vh; padding-top: 125px; padding-bottom: 115px; }
.not-found h1 { font-size: clamp(40px,5vw,70px); letter-spacing: -.06em; margin: 16px 0; }
.not-found p { color: var(--muted); line-height: 1.8; }
.not-found .btn { margin-top: 16px; }
#toast { position: fixed; bottom: 28px; left: 50%; transform: translate(-50%,30px); background: #162b49; color: white; padding: 13px 20px; border-radius: 11px; box-shadow: 0 16px 36px #122a4d40; font-size: 12px; z-index: 100; opacity: 0; pointer-events: none; transition: opacity .2s,transform .2s; }
#toast.visible { opacity: 1; transform: translate(-50%,0); }
@media (max-width: 1100px) {
  .hero { gap: 35px; }
  .hero-preview { padding: 25px 22px; }
  .guide-card { padding: 22px 19px; }
  .lesson-main { grid-template-columns: 255px minmax(0,1fr); gap: 16px; }
  .lesson-affiliate { flex-wrap: wrap; }
}
@media (max-width: 900px) {
  .shell { padding-left: 24px; padding-right: 24px; }
  .hero { grid-template-columns: 1fr; gap: 40px; padding-top: 65px; }
  .hero h1 { max-width: 740px; }
  .hero-preview { max-width: 590px; width: 100%; }
  .guide-grid { gap: 12px; }
  .guide-card { padding: 20px 17px; }
  .guide-card h3 { font-size: 21px; }
  .mini-flow { display: none; }
  .lesson-main { grid-template-columns: 1fr; }
  html { scroll-padding-top: 215px; }
  .lesson-sidebar { top: 78px; z-index: 40; }
  .sidebar-sticky { max-height: none; overflow: visible; padding: 13px 15px; box-shadow: 0 6px 24px rgba(21,43,77,.08); }
  .progress-track { margin: 10px 0 7px; height: 5px; }
  .progress-label { margin-bottom: 9px; font-size: 10px; }
  .step-jump { padding: 7px 8px; }
  .jump-count { flex-basis: 23px; width: 23px; height: 23px; }
  .sidebar-other { display: none; }
  .step-index { flex-direction: row; overflow-x: auto; padding-bottom: 7px; scrollbar-width: thin; }
  .step-jump { min-width: 155px; max-width: 190px; flex-shrink: 0; }
  .lesson-intro { padding: 33px 30px; }
  .faq-list { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .site-header { height: 67px; }
  .shell { padding-left: 17px; padding-right: 17px; }
  .top-nav { display: none; }
  .brand { font-size: 14px; }
  .brand-symbol { width: 34px; height: 34px; }
  .header-link { font-size: 11px; padding: 10px 11px; }
  .hero { padding-top: 53px; padding-bottom: 49px; }
  .hero h1 { font-size: clamp(39px,10vw,55px); }
  .hero-intro { font-size: 14px; line-height: 1.8; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; }
  .hero-preview { min-height: auto; padding: 21px 16px; }
  .preview-heading { margin: 27px 0 18px; }
  .preview-heading strong { font-size: 20px; }
  .strip { grid-template-columns: repeat(2,1fr); gap: 0; }
  .strip > span { padding: 13px 13px; font-size: 21px; }
  .strip > span:nth-child(2) { border-right: 0; }
  .strip > span:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section { padding-top: 68px; }
  .section-heading h2 { font-size: 32px; }
  .section-count { display: none; }
  .guide-grid,.how-grid,.faq-list { grid-template-columns: 1fr; }
  .guide-card { min-height: 300px; padding: 24px; }
  .mini-flow { display: flex; }
  .how-section { padding-bottom: 68px; }
  .cta-section { border-radius: 0; padding-top: 44px; padding-bottom: 44px; margin-left: 0; margin-right: 0; width: auto; }
  .cta-section h2 { font-size: 34px; }
  .cta-actions { flex-direction: column; }
  .cta-mark { right: -100px; }
  .faq-section { padding-top: 68px; padding-bottom: 70px; }
  .footer-grid { grid-template-columns: 1fr; padding-top: 43px; gap: 24px; }
  .footer-links { gap: 13px; }
  .footer-bottom { flex-direction: column; gap: 4px; }
  .breadcrumbs { white-space: nowrap; overflow-x: auto; padding: 22px 0; }
  .lesson-intro { padding: 28px 23px; }
  .lesson-intro h1 { font-size: 32px; }
  .lesson-intro p { font-size: 13px; }
  .intro-deco { display: none; }
  html { scroll-padding-top: 198px; }
  .lesson-sidebar { top: 67px; }
  .sidebar-sticky { padding: 10px 13px; }
  .sidebar-head strong { font-size: 12px; }
  .progress-track { margin: 8px 0 6px; }
  .progress-label { margin-bottom: 7px; }
  .step-jump { min-width: 139px; max-width: 170px; padding: 6px; font-size: 11px; }
  .lesson-main { gap: 14px; }
  .workflow-card { padding: 23px 18px; }
  .workflow-card-top { align-items: flex-start; }
  .workflow-card h2 { font-size: 19px; }
  .workflow-pill { display: none; }
  .flow-node { padding: 9px 10px; }
  .preflight { padding: 21px 20px; }
  .step-panel { padding: 24px 18px; }
  .step-panel h2 { font-size: 27px; }
  .action-list li { font-size: 12px; }
  .step-controls { flex-direction: column-reverse; align-items: stretch; }
  .lesson-affiliate { padding: 25px 20px; }
  .lesson-affiliate .btn { width: 100%; }
  .simple-page { padding-top: 65px; padding-bottom: 75px; }
  .simple-page .lead { font-size: 16px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *,*::before,*::after { transition-duration: .01ms !important; animation-duration: .01ms !important; } }


/* Reserved 16:9 video areas: intentionally non-interactive until videos exist. */
.video-home {
  display: grid;
  grid-template-columns: minmax(250px, .8fr) minmax(0, 1.2fr);
  gap: 40px;
  align-items: center;
  padding-top: 84px;
}
.video-home-copy h2 { margin: 14px 0 13px; font-size: clamp(27px, 3.2vw, 39px); letter-spacing: -.04em; line-height: 1.18; }
.video-home-copy p { color: var(--muted); font-size: 14px; line-height: 1.8; max-width: 380px; }
.video-guide-link { display: inline-flex; align-items: center; gap: 10px; margin-top: 13px; text-decoration: none; color: var(--blue); font-size: 13px; font-weight: 750; }
.video-guide-link:hover { text-decoration: underline; }
.video-frame {
  aspect-ratio: 16 / 9;
  position: relative;
  display: grid;
  place-items: center;
  padding: 28px;
  border-radius: 15px;
  color: white;
  background: radial-gradient(ellipse at 80% 25%, #31558d 0%, transparent 42%), linear-gradient(138deg, #142945 0%, #102037 100%);
  overflow: hidden;
  isolation: isolate;
}
.video-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}
.video-frame-center { position: relative; display: flex; align-items: center; flex-direction: column; gap: 11px; text-align: center; max-width: 92%; }
.video-frame-center strong { font-size: clamp(14px, 1.4vw, 19px); letter-spacing: -.02em; line-height: 1.3; }
.video-frame-center > span:last-child { font-size: 11px; line-height: 1.5; color: #b8cae6; }
.video-icon { height: 61px; width: 61px; display: grid; place-items: center; margin-bottom: 6px; border: 1px solid rgba(255,255,255,.24); background: rgba(255,255,255,.1); border-radius: 50%; }
.video-icon > span { width: 0; height: 0; margin-left: 4px; border-top: 9px solid transparent; border-bottom: 9px solid transparent; border-left: 15px solid white; }
.video-status { position: absolute; top: 17px; left: 17px; font-size: 9px; font-weight: 800; letter-spacing: 1.25px; border: 1px solid rgba(160,191,234,.35); color: #c9d9f2; padding: 7px 9px; border-radius: 6px; }
.video-ratio { position: absolute; bottom: 17px; right: 18px; color: #8fa7c9; font-size: 10px; letter-spacing: 1px; font-weight: 750; }
.lesson-video { background: #fff; border: 1px solid var(--line); border-radius: 17px; padding: 24px 28px 28px; margin-bottom: 16px; }
.lesson-video-heading h2 { margin: 9px 0 6px; font-size: 19px; letter-spacing: -.4px; }
.lesson-video-heading p { margin: 0 0 18px; font-size: 12px; color: var(--muted); line-height: 1.65; }
.lesson-video .video-frame { width: 100%; }
@media (max-width: 900px) {
  .video-home { grid-template-columns: 1fr; gap: 23px; padding-top: 70px; }
  .video-home-copy p { max-width: 600px; }
}
@media (max-width: 640px) {
  .video-home { padding-top: 56px; }
  .video-home-copy h2 { font-size: 29px; }
  .video-frame { padding: 22px 14px; border-radius: 12px; }
  .video-icon { width: 44px; height: 44px; margin-bottom: 2px; }
  .video-icon > span { border-top-width: 7px; border-bottom-width: 7px; border-left-width: 12px; }
  .video-status { top: 10px; left: 10px; font-size: 8px; padding: 5px 7px; }
  .video-ratio { right: 11px; bottom: 10px; font-size: 9px; }
  .video-frame-center { gap: 6px; }
  .video-frame-center > span:last-child { font-size: 10px; }
  .lesson-video { padding: 20px 16px; }
}