:root {
  --bg: #eff8eb;
  --surface: rgba(255,255,255,.82);
  --surface-solid: #ffffff;
  --text: #223129;
  --muted: #66766c;
  --line: rgba(46,83,60,.14);
  --primary: #5f9f6a;
  --primary-deep: #3f7951;
  --accent: #eebc74;
  --shadow: 0 16px 40px rgba(44, 70, 51, .10);
}
body[data-theme="eye"] { --bg:#edf5e6; --surface:rgba(251,249,236,.96); --surface-solid:#faf8eb; --text:#414832; --muted:#6c715e; --primary:#81995f; --primary-deep:#617744; --accent:#d7b66f; }
body[data-theme="pastel"] { --bg:#f2edf8; --surface:rgba(255,255,255,.88); --surface-solid:#fffaff; --text:#3f3448; --muted:#7a6f85; --primary:#9a82bc; --primary-deep:#755ca0; --accent:#efb49c; }
*{box-sizing:border-box}
html{scroll-behavior:auto}
body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text)}
a{color:inherit;text-decoration:none}.hidden{display:none!important}button,select,input{font:inherit}
.site-header{position:sticky;top:0;z-index:20;display:grid;grid-template-columns:30% 40% 30%;align-items:center;gap:0;padding:12px 28px;background:transparent;backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.brand-area{min-width:0;display:flex;align-items:center}.brand{font-weight:900;font-size:22px;white-space:nowrap}
.main-nav{display:flex;align-items:center;justify-content:flex-start;gap:34px;padding-left:26px;font-weight:800;color:var(--muted)}.main-nav a{padding:9px 2px}.main-nav a:hover,.main-nav a:focus-visible{color:var(--primary-deep)}
.header-tools{display:flex;justify-content:flex-end;align-items:center;gap:8px;min-width:0}.search-wrap{min-width:210px;flex:1}.search-wrap input{width:100%;padding:10px 13px;border:1px solid var(--line);border-radius:13px;background:var(--surface-solid);color:var(--text);outline:none}.search-wrap input:focus{border-color:var(--primary)}
.theme-tools{display:flex;gap:4px}.theme-btn,.ghost-btn{padding:9px 10px;border-radius:11px;border:1px solid var(--line);background:var(--surface-solid);font-size:12px;cursor:pointer;color:var(--text)}.theme-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.ghost-btn:hover,.theme-btn:hover{border-color:var(--primary)}
main{max-width:1280px;margin:0 auto}.hero-section{display:grid;grid-template-columns:1.2fr .8fr;gap:30px;padding:64px 28px 28px}.hero-copy h2{font-size:clamp(40px,6vw,74px);line-height:1.03;margin:0}.hero-copy h2 span{color:var(--primary-deep)}.hero-copy>p:not(.eyebrow){max-width:720px;font-size:18px;line-height:1.7;color:var(--muted);margin:22px 0}.eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--primary-deep);font-weight:800;margin:0 0 12px}.hero-actions{display:flex;gap:12px;margin-top:14px}
.primary-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 16px;border-radius:13px;font-weight:800;border:none;cursor:pointer}.primary-btn{background:var(--primary);color:#fff}.secondary-btn{background:var(--surface-solid);border:1px solid var(--line)}
.home-book-launcher{max-width:620px;margin:22px 0 4px;padding:16px;border:1px solid var(--line);border-radius:18px;background:var(--surface);box-shadow:0 10px 26px rgba(44,70,51,.05)}.home-book-launcher label{display:block;font-weight:800;margin-bottom:8px}.home-book-row{display:flex;gap:8px}.home-book-row .select-control{flex:1;min-width:0}
.select-control{padding:10px 12px;border-radius:12px;border:1px solid var(--line);background:var(--surface-solid);color:var(--text)}
.hero-panel{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:24px;padding:20px}.hero-panel-title{font-weight:900;margin-bottom:12px}.quick-card{display:block;width:100%;text-align:left;border:1px solid var(--line);background:rgba(255,255,255,.76);border-radius:16px;padding:15px;margin-bottom:9px;cursor:pointer;color:var(--text)}.quick-card span{font-size:22px;display:inline-block;margin-right:10px}.quick-card strong{display:inline}.quick-card small{display:block;color:var(--muted);margin-top:4px;padding-left:32px}
.content-section{padding:52px 28px}.compact-section{padding-top:24px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:18px}.section-heading h2{margin:0;font-size:32px}.section-note{margin:5px 0 0;color:var(--muted);font-size:14px}
.book-viewer{min-height:300px;padding:24px;background:var(--surface);border:1px solid var(--line);border-radius:22px}.book-toolbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}.book-toolbar button{border:1px solid var(--line);background:var(--surface-solid);padding:9px 12px;border-radius:11px;cursor:pointer}.book-toolbar button:hover{border-color:var(--primary)}.book-page{background:var(--surface-solid);border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--shadow)}.book-page h3{margin-top:0}.book-page .page-meta{font-size:12px;color:var(--muted)}.book-page iframe{width:100%;height:70vh;border:0;border-radius:14px;background:#fff}
.card-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 8px 26px rgba(44,70,51,.05)}.card h3{margin:0 0 8px;font-size:17px}.card p{color:var(--muted);line-height:1.55;margin:0 0 12px;font-size:14px}.card a{display:inline-flex;align-items:center;gap:8px;color:var(--primary-deep);font-weight:800;font-size:14px}.resource-list{display:grid;gap:10px}.resource-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 18px;border:1px solid var(--line);border-radius:16px;background:var(--surface)}.resource-row small{color:var(--muted)}.top-btn{position:fixed;right:20px;bottom:20px;width:48px;height:48px;border-radius:15px;border:none;background:var(--primary-deep);color:white;font-size:22px;box-shadow:var(--shadow);cursor:pointer;z-index:30}.site-footer{display:flex;justify-content:space-between;gap:20px;color:var(--muted);padding:34px 28px;font-size:13px}
@media(max-width:1100px){.site-header{grid-template-columns:1fr;gap:10px}.main-nav{padding-left:0}.header-tools{justify-content:flex-start}.search-wrap{max-width:none}.hero-section{grid-template-columns:1fr}.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:620px){.hero-section,.content-section{padding-left:18px;padding-right:18px}.card-grid{grid-template-columns:1fr}.site-header{padding:12px 18px}.main-nav{gap:14px;font-size:13px;overflow-x:auto;white-space:nowrap}.header-tools{flex-wrap:wrap}.search-wrap{flex-basis:100%}.home-book-row{flex-direction:column}.hero-copy h2{font-size:44px}.site-footer{flex-direction:column}}

/* Gate page */
.gate-page{min-height:100vh;overflow-x:hidden;position:relative;background:var(--bg)}
.gate-background{position:fixed;inset:0;background-image:linear-gradient(rgba(241,248,237,.70),rgba(241,248,237,.82)),url('/login-bg.png');background-size:cover;background-position:center;background-repeat:no-repeat;z-index:0}
.gate-topbar{position:fixed;top:18px;left:24px;right:24px;height:64px;display:flex;align-items:center;justify-content:space-between;padding:10px 14px 10px 18px;background:rgba(255,255,255,.62);backdrop-filter:blur(18px);border:1px solid rgba(72,110,83,.12);border-radius:20px;box-shadow:0 12px 34px rgba(38,70,48,.08);z-index:5}
.gate-brand{display:flex;align-items:center;gap:10px;font-weight:900;color:var(--text);font-size:18px}.gate-brand-icon{font-size:24px}
.gate-tools{display:flex;gap:7px}.gate-theme-btn{width:42px;height:42px;border-radius:13px;border:1px solid var(--line);background:rgba(255,255,255,.70);cursor:pointer;display:grid;place-items:center;font-size:18px;transition:none}.gate-theme-btn:hover,.gate-theme-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}
.gate-shell{position:relative;z-index:2;min-height:100vh;display:grid;place-items:center;padding:120px 20px 100px}
.gate-card{width:min(480px,92vw);padding:38px 38px 32px;border-radius:30px;background:rgba(255,255,255,.90);border:1px solid rgba(69,102,79,.14);box-shadow:0 28px 80px rgba(49,76,57,.16);text-align:center}
.gate-card .brand-mark{width:76px;height:76px;margin:0 auto 14px;display:grid;place-items:center;border-radius:50%;background:linear-gradient(145deg,#e9f4e7,#fbfff9);font-size:34px;border:1px solid rgba(77,113,88,.10)}
.gate-card h1{margin:0;font-size:38px;letter-spacing:-.03em}.gate-copy{margin:14px auto 24px;max-width:360px;color:var(--muted);line-height:1.7}.login-form{text-align:left}.login-form label{display:block;font-size:14px;font-weight:800;margin-bottom:8px}.password-row{position:relative}.password-row input{width:100%;padding:15px 52px 15px 16px;border:1px solid var(--line);border-radius:15px;background:var(--surface-solid);color:var(--text);outline:none}.password-row input:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(95,159,106,.10)}.icon-input-btn{position:absolute;right:8px;top:50%;transform:translateY(-50%);width:38px;height:38px;border:0;background:transparent;color:var(--muted);cursor:pointer;font-size:17px}.gate-submit{width:100%;margin-top:12px;padding:15px 18px;border-radius:15px;font-size:16px}.login-message{min-height:22px;margin:10px 0 0;color:#a34747;font-size:13px;text-align:center}.gate-note{margin-top:18px;padding-top:18px;border-top:1px solid var(--line);font-size:12px;line-height:1.6;color:var(--muted)}.gate-footer{position:fixed;left:0;right:0;bottom:18px;z-index:3;text-align:center;color:rgba(53,73,59,.64);font-size:12px}
body[data-theme="eye"] .gate-background{background-image:linear-gradient(rgba(244,242,226,.68),rgba(244,242,226,.80)),url('/login-bg.png')}
body[data-theme="pastel"] .gate-background{background-image:linear-gradient(rgba(247,243,251,.70),rgba(247,243,251,.82)),url('/login-bg.png')}
@media(max-width:620px){.gate-topbar{left:12px;right:12px;top:12px}.gate-card{padding:30px 22px}.gate-card h1{font-size:32px}.gate-shell{padding-top:110px}.gate-footer{bottom:10px;font-size:11px}}
/* icon-only theme controls in the app header */
.theme-btn{width:40px;height:40px;padding:0;display:grid;place-items:center;font-size:18px;border-radius:12px}.theme-btn[data-theme="light"]::before{content:"☀️"}.theme-btn[data-theme="eye"]::before{content:"🌙"}.theme-btn[data-theme="pastel"]::before{content:"🎨"}.theme-btn{font-size:0}.theme-btn::before{font-size:18px}