:root { --orange:#ff7a00; --ink:#0a0a0a; --muted:#6b7280; --line:#e5e7eb; --warm:#fff5eb; }
* { box-sizing:border-box; }
html { scroll-behavior:smooth; scroll-padding-top:24px; }
body { margin:0; color:var(--ink); background:#fff; font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif; }
body.modal-open { overflow:hidden; }
button,input { font:inherit; }
button,a { -webkit-tap-highlight-color:transparent; }
button { cursor:pointer; }
button:disabled { cursor:wait; opacity:.6; }
a { color:inherit; }
a,button,input { outline-offset:4px; }
a:focus-visible,button:focus-visible,input:focus-visible { outline:3px solid var(--orange); }
[hidden] { display:none!important; }
.shell { width:min(1160px,calc(100% - 64px)); margin-inline:auto; }
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }
.skip-link { position:absolute; top:-80px; left:16px; z-index:40; background:white; padding:12px; }
.skip-link:focus { top:10px; }
.brand { display:inline-flex; align-items:baseline; color:#111; font-size:27px; font-weight:800; letter-spacing:-1.6px; text-decoration:none; white-space:nowrap; }
.brand span,.brand b { color:var(--orange); }.brand b { margin-left:1px; }.brand small { color:#6b7280; font-size:9px; letter-spacing:1.7px; margin-left:10px; font-weight:750; }
.header-main { display:flex; align-items:center; gap:42px; padding-block:26px; }
.store-search { display:flex; align-items:center; gap:12px; max-width:520px; flex:1; border:1px solid var(--line); border-radius:8px; padding:8px 8px 8px 15px; background:#fafafa; }
.store-search > span { color:#777; font-size:26px; line-height:1; }.store-search input { min-width:0; flex:1; border:0; background:transparent; padding:4px 0; font-size:13px; }.store-search button { border:0; background:#111; color:white; border-radius:5px; padding:8px 15px; font-size:12px; font-weight:650; }
.header-help { margin-left:auto; font-size:12px; text-decoration:none; white-space:nowrap; }.header-help span { color:var(--orange); }
.store-header { border-bottom:1px solid var(--line); }.store-nav { display:flex; flex-wrap:wrap; gap:32px; padding-block:0 18px; }.store-nav a { font-size:12px; font-weight:650; text-decoration:none; }.store-nav a:first-child { color:#bd5700; }.store-nav a:hover { color:#bd5700; }
.eyebrow { display:flex; align-items:center; gap:8px; color:#666; font-size:10px; font-weight:800; letter-spacing:1.5px; margin:0 0 16px; }.eyebrow i { display:block; width:6px; height:6px; background:var(--orange); border-radius:50%; flex-shrink:0; }
h1,h2,h3,h4,p { margin-top:0; }h1,h2,h3,h4 { line-height:1.15; }
.button,.secondary-button { display:inline-flex; align-items:center; justify-content:center; gap:18px; border:1px solid var(--orange); border-radius:7px; background:var(--orange); color:#111; font-size:13px; font-weight:750; text-decoration:none; padding:12px 18px; min-height:44px; transition:background .15s,box-shadow .15s; }
.button:hover { background:#ed7100; }.secondary-button { border-color:#d9d9d9; background:white; }.secondary-button:hover { background:var(--warm); border-color:#ffbf85; }.button span,.secondary-button span { font-size:17px; }.secondary-button span { color:#bd5700; }
.text-link { color:#111; display:inline-flex; align-items:center; gap:12px; font-size:13px; font-weight:700; text-decoration:none; }.text-link span { color:#bd5700; }
.store-banner { background:linear-gradient(110deg,#fff5eb,#ffeddd); overflow:hidden; }
.banner-inner { display:grid; grid-template-columns:1fr .85fr; align-items:center; gap:48px; min-height:340px; padding-block:36px; }
.banner-inner h1 { font-size:clamp(36px,4vw,52px); letter-spacing:-2.8px; margin:0 0 18px; }.banner-inner h1 em { color:#db6500; font-style:normal; }.banner-inner p:not(.eyebrow) { color:#646464; line-height:1.65; font-size:14px; margin-bottom:20px; }
.banner-books { position:relative; height:280px; width:360px; justify-self:center; }.banner-book { width:166px; height:249px; object-fit:cover; position:absolute; box-shadow:9px 14px 24px #4d290326; border-radius:2px 5px 5px 2px; }.banner-book-back { left:18px; top:16px; transform:rotate(-10deg); }.banner-book-front { right:24px; top:10px; transform:rotate(9deg); }
.catalog { padding-block:48px 64px; }.catalog-heading { display:flex; align-items:end; justify-content:space-between; gap:24px; padding-bottom:28px; border-bottom:1px solid var(--line); margin-bottom:30px; }.catalog-heading .eyebrow { margin-bottom:10px; }.catalog-heading h2 { font-size:32px; letter-spacing:-1.5px; margin:0 0 10px; }.catalog-heading p:not(.eyebrow) { font-size:13px; color:var(--muted); margin:0; }.resource-count { font-size:12px; color:#777; flex-shrink:0; }
.catalog-layout { display:grid; grid-template-columns:205px minmax(0,1fr); gap:45px; }.catalog-sidebar h3 { font-size:13px; margin:0 0 16px; }.topic-filters { display:flex; flex-direction:column; gap:4px; }.topic-filters button { display:flex; align-items:center; justify-content:space-between; gap:10px; text-align:left; border:0; background:transparent; border-radius:6px; color:#555; padding:11px 12px; font-size:12px; }.topic-filters button span { color:#888; font-size:10px; }.topic-filters button[aria-pressed="true"] { background:var(--warm); color:#a34a00; font-weight:750; }.topic-filters button:hover { background:#faf5ee; }
.sidebar-note { border-top:1px solid var(--line); margin-top:32px; padding:25px 12px 0; }.sidebar-note > span { font-size:25px; color:#bd5700; }.sidebar-note h4 { font-size:13px; margin:12px 0 8px; }.sidebar-note p { color:var(--muted); font-size:12px; line-height:1.7; }
.book-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:34px; }.book-card { min-width:0; display:flex; flex-direction:column; align-items:flex-start; }.book-link { width:100%; text-decoration:none; }.book-stage { display:block; width:min(100%,210px); aspect-ratio:2/3; margin:0 0 22px; position:relative; transition:transform .2s; }.book-link:hover .book-stage { transform:translateY(-5px); }.book-cover { display:block; width:100%; height:100%; object-fit:cover; border-radius:2px 5px 5px 2px; box-shadow:4px 7px 13px #00000025; }.book-spine { position:absolute; left:0; top:0; bottom:0; width:6px; background:linear-gradient(90deg,#00000035,#ffffff18,transparent); }.book-category { color:#9b4900; font-size:9px; font-weight:750; letter-spacing:1px; margin:0 0 8px; }.book-card h3 { font-size:18px; letter-spacing:-.5px; margin:0 0 8px; min-height:42px; }.book-card h3 a { text-decoration:none; }.book-card h3 a:hover { color:#bd5700; }.book-author { color:#777; font-size:11px; margin:0 0 13px; }.book-description { color:#666; font-size:12px; line-height:1.6; margin:0 0 14px; }.book-price { font-size:12px; margin:auto 0 15px; }.book-price span { color:#999; padding:0 3px; }.book-price strong { font-weight:750; }.book-actions { display:flex; width:100%; gap:8px; }.book-actions .button,.book-actions .secondary-button { flex:1; padding:9px 10px; font-size:12px; gap:8px; min-height:40px; }.book-details-link { color:#666; text-decoration:none; font-size:11px; margin-top:13px; }.book-details-link:hover { color:#bd5700; }
.empty-results { background:var(--warm); border-radius:10px; padding:32px; }.empty-results p { color:#666; }
.how-section { display:grid; grid-template-columns:260px minmax(0,1fr); gap:50px; padding-block:36px 60px; border-top:1px solid var(--line); }.how-section h2 { font-size:28px; letter-spacing:-1.2px; margin-bottom:0; }.how-section ol { list-style:none; display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:26px; padding:0; margin:0; }.how-section li > span { color:#bd5700; font-size:11px; font-weight:800; }.how-section h3 { font-size:15px; margin:16px 0 8px; }.how-section li p { font-size:12px; color:#777; line-height:1.65; margin:0; }
.store-footer { background:var(--warm); border-top:1px solid #ffe5cf; }.footer-main { display:flex; align-items:center; flex-wrap:wrap; gap:24px; padding-block:28px; }.footer-main .brand { font-size:23px; }.footer-main p { color:#777; font-size:12px; margin:0; }.footer-main > a:not(.brand) { margin-left:auto; font-size:12px; text-decoration:none; }.footer-main > small { color:#777; font-size:11px; }
.breadcrumbs { display:flex; align-items:center; flex-wrap:wrap; gap:10px; color:#777; font-size:11px; padding-block:26px 34px; }.breadcrumbs a { text-decoration:none; }.breadcrumbs a:hover { color:#bd5700; }
.book-detail { display:grid; grid-template-columns:320px minmax(0,1fr); gap:70px; padding-bottom:52px; }.detail-cover-stage { background:#fff7ef; border-radius:10px; padding:34px; align-self:start; text-align:center; }.detail-cover { width:100%; height:auto; display:block; box-shadow:8px 12px 20px #00000026; border-radius:2px 5px 5px 2px; }.detail-cover-stage p { color:#777; font-size:10px; margin:23px 0 0; }.detail-overview { padding-top:12px; }.detail-overview h1 { font-size:clamp(34px,4vw,48px); letter-spacing:-2px; margin:0 0 14px; max-width:640px; }.detail-author { font-size:12px; color:#777; margin-bottom:22px; }.detail-intro { max-width:590px; color:#666; font-size:15px; line-height:1.7; margin-bottom:24px; }.detail-tags { display:flex; flex-wrap:wrap; gap:8px; margin-bottom:26px; }.detail-tags span { background:#f6f6f6; border-radius:4px; padding:6px 10px; color:#666; font-size:10px; }.edition-choices { border-block:1px solid var(--line); padding-block:20px; display:grid; grid-template-columns:1fr 1fr; gap:22px; }.edition-choices h2 { display:flex; flex-wrap:wrap; gap:5px 12px; font-size:14px; margin-bottom:10px; }.edition-choices h2 span { color:#bd5700; }.edition-choices p { color:#777; font-size:12px; line-height:1.6; margin:0; }.detail-actions { display:flex; gap:12px; margin-top:24px; }.detail-actions > * { min-width:150px; justify-content:space-between; }.detail-payment-note { font-size:11px; color:#777; margin:16px 0 0; }
.detail-section-heading { margin-bottom:24px; }.detail-section-heading h2 { font-size:28px; letter-spacing:-1px; margin-bottom:0; }.detail-section-heading .eyebrow { margin-bottom:10px; }.detail-comparison,.inside-section { padding-block:32px 48px; border-top:1px solid var(--line); }.table-wrap { border:1px solid var(--line); border-radius:8px; padding:18px; }.table-wrap table { width:100%; border-collapse:collapse; table-layout:fixed; }.table-wrap caption { text-align:left; color:#777; font-size:11px; padding-bottom:15px; }.table-wrap th,.table-wrap td { padding:15px; font-size:12px; border-bottom:1px solid var(--line); }.table-wrap th { text-align:left; }.table-wrap th:first-child { width:62%; }.table-wrap tbody th { font-weight:500; }.table-wrap td,.table-wrap thead th:not(:first-child) { text-align:center; }.table-wrap thead { background:var(--warm); }.table-wrap tr:last-child > * { border-bottom:0; }
.inside-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:20px; }.inside-grid article { background:#fafafa; border:1px solid var(--line); border-radius:8px; padding:24px; }.inside-grid article > span { color:#bd5700; font-size:11px; font-weight:800; }.inside-grid h3 { font-size:17px; margin:20px 0 12px; }.inside-grid p { font-size:13px; color:#777; line-height:1.7; }.inside-grid small { font-size:9px; letter-spacing:.5px; color:#bd5700; }
.detail-bottom-cta { display:flex; flex-wrap:wrap; justify-content:space-between; align-items:center; gap:24px; background:var(--warm); padding:32px; border-radius:10px; margin-bottom:56px; }.detail-bottom-cta h2 { font-size:24px; letter-spacing:-.7px; margin:0 0 8px; }.detail-bottom-cta p { color:#777; font-size:13px; margin:0; }.detail-bottom-cta .detail-actions { margin:0; }
.chapter-preview { border:1px solid var(--line); border-radius:10px; overflow:hidden; margin:0 0 40px; }.chapter-label { display:flex; flex-wrap:wrap; justify-content:space-between; align-items:center; gap:12px; padding:20px 28px; border-bottom:1px solid var(--line); }.chapter-label .eyebrow { margin:0; }.chapter-label > span { color:#888; font-size:10px; }.chapter-title { background:var(--warm); padding:32px; }.chapter-title h2 { font-size:32px; letter-spacing:-1px; margin:0 0 14px; }.chapter-title > p { color:#777; font-size:13px; max-width:650px; }.chapter-title > p:first-child { color:#bd5700; font-weight:700; }.chapter-grid { display:grid; grid-template-columns:1fr 1fr; }.dialogue-preview,.phrases-preview { padding:28px; }.preview-kicker { color:#777; font-size:10px; letter-spacing:1px; font-weight:750; }.dialogue-preview > div { display:flex; align-items:start; gap:12px; margin:20px 0; }.dialogue-preview b { border-radius:50%; background:#111; color:white; font-size:10px; padding:6px 10px; }.dialogue-preview p:not(.preview-kicker) { font-size:13px; color:#666; margin:0; line-height:1.6; }.phrases-preview { background:#111; color:#fff; }.phrases-preview small { font-size:9px; color:#aaa; display:block; margin:18px 0 8px; }.phrases-preview span { display:block; background:#ffffff12; padding:10px; font-size:12px; margin-bottom:8px; }.phrases-preview a { color:#ffad66; font-size:12px; text-decoration:none; display:block; margin-top:24px; }
.vocab-sample { display:grid; grid-template-columns:1fr 1fr; align-items:center; gap:40px; background:#111; color:white; border-radius:10px; padding:36px; margin:0 0 48px; }.vocab-sample .eyebrow { color:#bbb; }.vocab-sample h2 { font-size:30px; letter-spacing:-1px; }.vocab-sample mark { background:none; color:var(--orange); }.vocab-sample > div > p:not(.eyebrow) { color:#bbb; font-size:13px; }.vocab-quiz { background:#fff; color:#111; border-radius:6px; padding:22px; }.vocab-quiz h3 { font-size:20px; }.vocab-quiz button { display:block; width:100%; text-align:left; background:white; border:1px solid var(--line); border-radius:5px; padding:10px; margin:8px 0; font-size:12px; }.vocab-quiz button.correct { background:#dcfce7; }.vocab-quiz button.incorrect { background:#fee2e2; }.quiz-feedback { font-size:12px; color:#15803d; min-height:18px; }.quiz-feedback.is-error { color:#b91c1c; }
.checkout-modal { position:fixed; inset:0; z-index:30; display:grid; place-items:center; padding:20px; }.checkout-backdrop { position:absolute; inset:0; background:#0008; }.checkout-dialog { width:min(100%,560px); max-height:calc(100dvh - 40px); overflow-y:auto; background:white; border-radius:12px; box-shadow:0 20px 60px #0003; position:relative; }.modal-close { position:absolute; top:8px; right:12px; font-size:28px; border:0; background:transparent; color:#555; padding:4px 10px; }.checkout-summary { display:flex; align-items:center; gap:22px; background:var(--warm); padding:28px 45px 28px 28px; }.checkout-summary img { width:70px; height:105px; object-fit:cover; box-shadow:3px 5px 10px #0003; }.checkout-summary .eyebrow { margin-bottom:8px; font-size:9px; }.checkout-summary h2 { font-size:22px; letter-spacing:-.5px; margin:0 0 8px; }.checkout-summary #checkout-format { font-size:11px; color:#777; margin:0 0 8px; }.checkout-summary strong { font-size:20px; }.checkout-payment { padding:26px 28px; }.checkout-payment h3 { font-size:21px; margin:0 0 10px; }.checkout-payment p { color:#777; font-size:13px; line-height:1.6; }.payment-methods { display:grid; gap:12px; margin-block:20px; }.payment-method { width:100%; display:flex; align-items:center; gap:14px; padding:16px; border:1px solid var(--line); border-radius:8px; background:white; text-align:left; }.payment-method:hover,.payment-method[aria-expanded="true"] { background:var(--warm); border-color:var(--orange); }.method-logo { display:grid; place-items:center; width:38px; height:38px; border-radius:8px; font-size:23px; font-weight:900; }.gcash-logo { color:white; background:#0078ff; }.paypal-logo { color:#003087; background:#eaf2ff; font-style:italic; }.payment-method b { display:block; font-size:14px; }.payment-method small { display:block; font-size:11px; color:#777; margin-top:4px; }.method-arrow { margin-left:auto; color:#bd5700; }.provider-panel { padding:16px 0 0; border-top:1px solid var(--line); }.provider-panel .button { width:100%; justify-content:space-between; }.payment-note { display:block; color:#888; font-size:11px; margin-top:18px; }.checkout-message { margin:14px 0 0; }.checkout-message.error,.email-status.error { color:#b91c1c; }.checkout-support { display:block; color:#666; font-size:11px; margin-top:20px; text-decoration:none; }.checkout-payment .success-label { color:#15803d; font-weight:750; }.email-download { margin-top:12px; }.email-status { font-size:12px; color:#15803d; }
@media (max-width:1050px) { .header-main { gap:24px; }.catalog-layout { grid-template-columns:180px minmax(0,1fr); gap:28px; }.book-grid { grid-template-columns:repeat(2,minmax(0,1fr)); gap:30px; }.book-stage { width:min(100%,230px); }.how-section { grid-template-columns:1fr; gap:28px; }.book-detail { grid-template-columns:280px minmax(0,1fr); gap:38px; }.banner-books { width:300px; }.banner-book { width:145px; height:218px; }.banner-book-back { left:4px; }.banner-book-front { right:0; } }
@media (max-width:760px) { .shell { width:calc(100% - 40px); }.header-main { flex-wrap:wrap; gap:18px; padding-block:20px 16px; }.brand { font-size:25px; }.store-search { order:3; flex-basis:100%; max-width:none; }.header-help { font-size:11px; }.store-nav { gap:14px 22px; padding-bottom:16px; }.store-nav a { font-size:11px; }.banner-inner { grid-template-columns:1fr 220px; min-height:300px; gap:12px; padding-block:28px; }.banner-inner h1 { font-size:34px; letter-spacing:-1.8px; }.banner-inner p:not(.eyebrow) { font-size:13px; }.banner-books { width:220px; height:220px; }.banner-book { width:112px; height:168px; }.banner-book-back { top:25px; left:7px; }.banner-book-front { top:40px; right:5px; }.catalog { padding-block:32px 44px; }.catalog-heading { gap:12px; align-items:start; padding-bottom:22px; margin-bottom:22px; }.catalog-heading h2 { font-size:28px; }.catalog-heading p:not(.eyebrow) { max-width:350px; }.resource-count { padding-top:3px; }.catalog-layout { grid-template-columns:1fr; gap:26px; }.catalog-sidebar h3 { margin-bottom:12px; }.topic-filters { flex-direction:row; flex-wrap:wrap; gap:8px; }.topic-filters button { border:1px solid var(--line); padding:9px 11px; font-size:11px; }.sidebar-note { display:none; }.book-grid { gap:28px; }.book-stage { width:min(100%,220px); }.how-section { padding-block:30px 40px; }.how-section h2 { font-size:25px; }.how-section ol { gap:22px; }.footer-main { gap:16px; }.footer-main p { flex-basis:100%; }.footer-main > a:not(.brand) { margin-left:0; }.book-detail { grid-template-columns:230px minmax(0,1fr); gap:28px; }.detail-cover-stage { padding:24px; }.detail-overview h1 { font-size:32px; letter-spacing:-1.3px; }.detail-overview { padding-top:0; }.edition-choices { grid-template-columns:1fr; gap:16px; }.detail-actions > * { min-width:0; flex:1; }.inside-grid { grid-template-columns:1fr; }.detail-bottom-cta { padding:24px; }.detail-bottom-cta .detail-actions { width:100%; }.chapter-grid,.vocab-sample { grid-template-columns:1fr; }.vocab-sample { padding:25px; gap:20px; } }
@media (max-width:520px) { .banner-inner { grid-template-columns:1fr; padding-block:28px; gap:12px; }.banner-inner h1 { font-size:36px; }.banner-books { height:210px; width:270px; justify-self:center; }.banner-book { width:127px; height:190px; }.banner-book-back { top:6px; left:15px; }.banner-book-front { top:10px; right:15px; }.desktop-break { display:none; }.catalog-heading { flex-wrap:wrap; }.catalog-heading .eyebrow { font-size:9px; }.resource-count { width:100%; }.book-grid { gap:26px 18px; }.book-card h3 { font-size:16px; min-height:55px; }.book-stage { margin-bottom:18px; }.book-description { font-size:11px; }.book-price { display:flex; flex-direction:column; gap:3px; font-size:11px; }.book-price > span { display:none; }.book-actions { gap:5px; }.book-actions .button,.book-actions .secondary-button { padding:9px 6px; gap:5px; font-size:11px; }.book-actions span { font-size:14px; }.book-category { font-size:8px; letter-spacing:.6px; }.book-author { font-size:10px; min-height:30px; }.how-section ol { grid-template-columns:1fr; gap:22px; }.how-section li { display:grid; grid-template-columns:25px 1fr; column-gap:12px; }.how-section h3 { margin:0 0 8px; }.how-section li p { grid-column:2; }.book-detail { grid-template-columns:1fr; gap:28px; padding-bottom:32px; }.detail-cover-stage { width:min(270px,100%); justify-self:center; }.breadcrumbs { padding-block:22px; }.detail-overview h1 { font-size:36px; }.detail-comparison,.inside-section { padding-block:26px 32px; }.detail-section-heading h2 { font-size:25px; }.table-wrap { padding:12px 8px; }.table-wrap th:first-child { width:55%; }.table-wrap th,.table-wrap td { font-size:11px; padding:12px 7px; overflow-wrap:anywhere; }.chapter-title,.dialogue-preview,.phrases-preview { padding:24px; }.chapter-label { padding:18px 24px; }.checkout-modal { padding:12px; }.checkout-dialog { max-height:calc(100dvh - 24px); }.checkout-summary { padding:26px 36px 24px 22px; gap:16px; }.checkout-summary h2 { font-size:19px; }.checkout-summary img { width:60px; height:90px; }.checkout-payment { padding:24px 22px; } }
@media (prefers-reduced-motion:reduce) { html { scroll-behavior:auto; }* { transition:none!important; } }

/* Product requirements stay visible before purchase. */
.compatibility-note{background:#fff3e6;border:1px solid #e7bd94;border-left:4px solid #ff7900;border-radius:8px;padding:14px 16px;margin:16px 0;color:#513b2b;font-size:13px;line-height:1.55}.compatibility-note p,.checkout-payment .compatibility-note p{font-size:12px;color:#513b2b;margin:6px 0 0}.book-compatibility{font-size:11px;line-height:1.5;color:#684c37;margin:0 0 14px}