* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--canvas); color: var(--ink); font-family: var(--font-ui); font-size: 15px; line-height: 1.55; }
[hidden] { display: none !important; }
a { color: var(--action); text-underline-offset: 4px; }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
button { cursor: pointer; }
button, input, select, .button-link, summary { min-height: 44px; }
button:disabled { cursor: not-allowed; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; }
h1,h2,h3,p { overflow-wrap: anywhere; }
h1,h2,h3 { line-height: 1.2; letter-spacing: -.02em; }
h2 { font-size: 24px; }
h3 { font-size: 18px; }
.ui-icon { width: 20px; height: 20px; flex: 0 0 auto; vertical-align: middle; }
.skip-link { position: fixed; top: -100px; left: 16px; padding: 14px 20px; z-index: 100; background: white; border-radius: 10px; color: var(--action); }
.skip-link:focus { top: 12px; }
.sidebar { width: var(--sidebar-width); position: fixed; inset: 0 auto 0 0; display: flex; flex-direction: column; padding: 32px 18px 22px; border-right: 1px solid var(--line); background: white; z-index: 5; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); padding: 0 6px; }
.brand-symbol { width: 46px; height: auto; flex-shrink: 0; }
.brand-text { display: grid; gap: 3px; min-width: 0; }
.brand-wordmark { display: block; width: 116px; height: auto; }
[data-theme="dark"] .brand-wordmark-light, :root:not([data-theme="dark"]) .brand-wordmark-dark { display: none; }
.brand small { display: block; padding-left: 2px; font-size: 9.5px; font-weight: 700; color: var(--muted); line-height: 1.2; }
.brand small b { margin-left: .25em; font-weight: 800; letter-spacing: .2em; }
.sidebar-label { margin: 42px 12px 14px; font-size: 9px; letter-spacing: 1.7px; font-weight: 750; color: var(--muted); }
.sidebar nav { display: grid; gap: 7px; }
.nav-item { display: flex; align-items: center; gap: 12px; min-height: 47px; border-radius: 12px; padding: 12px; text-decoration: none; color: var(--muted); font-size: 13px; font-weight: 650; transition: background var(--motion-fast), color var(--motion-fast); }
.nav-item:hover { background: var(--indigo-soft); color: var(--action); }
.nav-item.active { background: var(--action); color: white; box-shadow: 0 4px 10px #4f46e518; }
.sidebar-bottom { margin-top: auto; padding: 20px 15px; background: #f5f5ff; border: 1px solid #ebebfa; border-radius: 16px; }
.sidebar-spark { display: block; color: var(--action); font-size: 25px; margin-bottom: 10px; }
.sidebar-bottom strong { display: block; font-size: 13px; }
.sidebar-bottom p { font-size: 11px; color: var(--muted); line-height: 1.7; margin: 8px 0 18px; }
.version { font-size: 9px; color: var(--muted); letter-spacing: 1px; }
.main-content { margin-left: var(--sidebar-width); padding: 0 38px 28px; max-width: 1820px; min-width: 0; }
.topbar { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 20px; border-bottom: 1px solid var(--line); font-size: 11px; color: var(--muted); }
.breadcrumb span { margin: 0 10px; color: #7c879f; }
.teacher-pill { display: flex; align-items: center; gap: 8px; font-size: 11px; font-weight: 650; white-space: nowrap; }
.teacher-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--teal-ink); }
#app { min-height: 65vh; }
.page-heading { margin: 34px 0 28px; }
.page-heading h1 { font-size: clamp(30px,3.5vw,46px); margin: 10px 0 14px; max-width: 940px; letter-spacing: -.03em; }
.page-description { max-width: 820px; color: var(--muted); font-size: 15px; line-height: 1.75; margin: 0; }
.eyebrow { display: flex; align-items: center; gap: 7px; margin: 0 0 10px; font-size: 10px; font-weight: 750; color: var(--action); letter-spacing: 1.5px; line-height: 1.5; }
.eyebrow .ui-icon { width: 16px; height: 16px; }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 32px 0 18px; }
.section-heading h2 { margin: 0; }
.section-heading p { margin: 5px 0 0; color: var(--muted); font-size: 12px; }
.primary-button,.secondary-button,.text-button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; border: 1px solid transparent; border-radius: var(--radius-sm); font-size: 13px; font-weight: 700; min-height: 44px; padding: 11px 16px; line-height: 1.4; text-align: center; text-decoration: none; transition: background var(--motion-fast),border-color var(--motion-fast),box-shadow var(--motion-fast),transform var(--motion-fast); }
.primary-button { background: var(--action); color: white; }
.primary-button:hover { background: var(--action-hover); box-shadow: 0 5px 14px #4f46e524; transform: translateY(-1px); }
.primary-button:active { background: var(--action-pressed); transform: translateY(0); }
.secondary-button { background: white; border-color: #ccd3e2; color: var(--ink); }
.secondary-button:hover { background: var(--indigo-soft); border-color: #ada6ef; color: var(--action-pressed); }
.secondary-button:active { background: #e4e1ff; }
.text-button { background: transparent; color: var(--action); padding-inline: 7px; }
.text-button:hover { background: var(--indigo-soft); }
.primary-button:disabled,.secondary-button:disabled { background: #edf0f6; color: #647087; border: 1px solid #d3dae7; box-shadow: none; transform: none; }
.primary-button .ui-icon,.secondary-button .ui-icon { width: 17px; height: 17px; }
.amber-button { background: var(--amber); color: var(--navy); }
.amber-button:hover { background: #fbbf24; color: var(--navy); box-shadow: 0 6px 20px #1118271a; }
.badge,.level-badge { display: inline-flex; align-items: center; justify-content: center; gap: 5px; min-height: 27px; padding: 5px 9px; border-radius: 7px; background: var(--surface-soft); color: #46516a; font-size: 10px; font-weight: 700; line-height: 1.3; }
.badge.ready { background: var(--indigo-soft); color: var(--action-pressed); }
.badge.review { background: var(--amber-soft); color: var(--amber-ink); }
.level-badge { background: var(--level-soft); color: var(--level-ink); min-width: 33px; font-weight: 800; font-size: 12px; }
.badges { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; margin-bottom: 16px; }
.area-icon { display: grid; place-items: center; color: var(--area-ink,var(--action)); background: var(--area-soft,var(--indigo-soft)); border-radius: 14px; width: 52px; height: 58px; flex: 0 0 auto; }
.area-icon .ui-icon { width: 28px; height: 28px; }
.info-panel { padding: 25px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); margin: 24px 0; box-shadow: var(--shadow-card); }
.info-panel h2 { margin: 0 0 15px; font-size: 21px; }
.info-panel p,.info-panel li { line-height: 1.8; }
.info-panel li+li { margin-top: 7px; }
.small-text { font-size: 12px; color: var(--muted); line-height: 1.7; }
.field { display: block; min-width: 0; }
.field>span { display: block; color: #43506b; font-weight: 700; font-size: 12px; margin: 0 0 8px; }
.field input,.field select { display: block; width: 100%; min-width: 0; height: 46px; padding: 0 12px; background: white; border: 1px solid #bbc6d9; border-radius: 10px; color: var(--ink); font-size: 13px; transition: border-color var(--motion-fast),box-shadow var(--motion-fast); }
.field input:hover,.field select:hover { border-color: #888ed4; }
.field input:focus,.field select:focus { border-color: var(--action); box-shadow: 0 0 0 3px #6366f11a; }
.field input::placeholder { color: #67738a; }
.form-error { color: var(--danger); font-size: 13px; font-weight: 650; }
.form-error:empty { margin: 0; }
summary { display: list-item; cursor: pointer; font-weight: 700; padding: 10px 0; }
summary::marker { color: var(--action); }
.action-row,.pagination { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 12px; margin: 26px 0; }
.pagination { font-size: 12px; color: var(--muted); }
.empty-state { padding: 48px 24px; text-align: center; background: white; border: 1px solid var(--line); border-radius: var(--radius-lg); margin-top: 30px; }
.empty-state .ui-icon { width: 40px; height: 40px; color: var(--indigo); }
.review-note { font-size: 12px; color: var(--muted); line-height: 1.8; margin-top: 26px; }
.loading-state { padding: 65px 0; text-align: center; color: var(--muted); }
footer { text-align: center; margin-top: 38px; padding: 20px 0 4px; border-top: 1px solid var(--line); color: var(--muted); font-size: 10px; line-height: 1.8; }
footer span { margin: 0 7px; }
@media(max-width:1100px){:root{--sidebar-width:196px}.sidebar{padding-inline:12px}.main-content{padding-inline:26px}.brand-symbol{width:40px}.brand-wordmark{width:100px}}
@media(max-width:800px){.sidebar{position:static;width:100%;padding:18px 20px 12px;flex-direction:row;align-items:center;gap:12px;flex-wrap:wrap;border-right:0;border-bottom:1px solid var(--line)}.sidebar-label,.sidebar-bottom{display:none}.sidebar nav{display:flex;gap:7px;flex-wrap:wrap;width:100%;margin-top:5px}.nav-item{font-size:12px;min-height:44px;padding:10px 12px}.brand{padding:0}.brand-symbol{width:38px}.brand-wordmark{width:98px}.brand small{font-size:9px}.main-content{margin:0;padding:0 20px 22px}.topbar{min-height:54px;font-size:10px}.breadcrumb{max-width:60%}.breadcrumb span{margin:0 4px}.teacher-pill{font-size:10px}.page-heading{margin-top:26px}.page-heading h1{font-size:32px}.section-heading{align-items:start;flex-wrap:wrap}.section-heading h2{font-size:22px}.info-panel{padding:20px}.page-description{font-size:14px}.primary-button,.secondary-button{font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}