:root{color-scheme:light;--bg: #f8faf8;--surface: #ffffff;--surface-soft: #f2f5f1;--text: #18201c;--muted: #6c756f;--line: #e4e9e2;--accent: #276749;--accent-soft: #e5f4ec;--danger: #b42318;--danger-soft: #fff0ee;--shadow: 0 18px 45px rgba(28, 45, 34, .08);--radius: 8px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}:root[data-theme=dark]{color-scheme:dark;--bg: #101311;--surface: #171b18;--surface-soft: #202720;--text: #eef4ee;--muted: #a6b0a8;--line: #2c352e;--accent: #8fd2ad;--accent-soft: #1f3429;--danger: #ff9b92;--danger-soft: #3b211f;--shadow: 0 18px 45px rgba(0, 0, 0, .25)}*{box-sizing:border-box}body{margin:0;min-width:320px;background:var(--bg);color:var(--text)}button,input,textarea,select{font:inherit}button{color:inherit}.app{min-height:100vh}.topbar{position:sticky;top:0;z-index:20;display:grid;grid-template-columns:auto minmax(240px,640px) auto;gap:18px;align-items:center;padding:16px clamp(18px,4vw,48px);background:color-mix(in srgb,var(--bg) 88%,transparent);border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.brand,.text-button,.primary-button,.danger-button,.icon-button,.button{border:0;cursor:pointer}.brand{display:inline-flex;align-items:center;gap:10px;min-width:max-content;background:transparent;font-weight:760;letter-spacing:0}.brand__mark,.icon-badge{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);background:var(--surface);box-shadow:0 8px 22px #1c2d220f}.brand__mark{width:34px;height:34px;border-radius:var(--radius);color:var(--accent)}.topbar__actions{display:flex;justify-content:flex-end;align-items:center;gap:8px}.topbar__user{display:inline-flex;align-items:center;gap:6px;padding:0 10px;color:var(--muted);font-size:.85rem;white-space:nowrap}.icon-button{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}.search-wrap{position:relative}.search-icon{position:absolute;top:50%;left:14px;transform:translateY(-50%);color:var(--muted)}.search-input{width:100%;height:44px;padding:0 16px 0 42px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);color:var(--text);outline:none;box-shadow:0 10px 30px #1c2d220a}.search-input:focus,input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.search-popover{position:absolute;top:calc(100% + 10px);left:0;right:0;z-index:30;max-height:520px;overflow:auto;padding:10px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}.search-popover__header,.section-title,.question-card__footer,.question-admin-item__footer{display:flex;align-items:center;justify-content:space-between;gap:12px}.search-popover__header{padding:6px 6px 10px;color:var(--muted);font-size:.85rem}.search-popover__header button{border:0;background:transparent;color:var(--accent);cursor:pointer}.search-result,.inline-result{display:grid;gap:4px;width:100%;padding:12px;border:1px solid transparent;border-radius:var(--radius);background:transparent;text-align:left;cursor:pointer}.search-result:hover,.inline-result:hover{border-color:var(--line);background:var(--surface-soft)}.search-result__subject,.inline-result span,.eyebrow{color:var(--accent);font-size:.78rem;font-weight:760;text-transform:uppercase}.search-result small,.muted{color:var(--muted)}.page{width:min(1180px,calc(100% - 32px));margin:0 auto;padding:42px 0 70px}.page-heading{max-width:780px;margin-bottom:34px}.page-heading--compact{margin-bottom:22px}.eyebrow{margin:0 0 10px;letter-spacing:0}h1,h2,h3,h4,p{margin-top:0}h1{margin-bottom:12px;font-size:clamp(2.25rem,6vw,4.6rem);line-height:.98;letter-spacing:0}h2{margin-bottom:0;font-size:1.15rem}h3{margin-bottom:8px;font-size:1.15rem}h4{margin-bottom:8px;font-size:.84rem;color:var(--muted);text-transform:uppercase;display:flex;align-items:center;gap:6px}p{color:var(--muted);line-height:1.7}.stats-row,.subject-card__meta,.chip-row{display:flex;flex-wrap:wrap;gap:8px}.stats-row span,.tag,.chip,.subject-card__meta span{display:inline-flex;align-items:center;gap:6px;min-height:28px;padding:0 10px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--muted);font-size:.84rem}.subject-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.subject-card{display:grid;min-height:218px;padding:20px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);text-align:left;cursor:pointer}.subject-card:hover{border-color:color-mix(in srgb,var(--accent) 45%,var(--line));transform:translateY(-1px)}.subject-card__top{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}.subject-card__arrow{color:var(--muted)}.icon-badge{width:42px;height:42px;border-radius:var(--radius);color:var(--accent)}.icon-badge--sm{width:30px;height:30px}.subject-card__meta{margin-top:auto}.badge{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:999px;font-size:.78rem;font-weight:680;white-space:nowrap}.badge--private{border:1px solid #f59e0b;background:#fef3c7;color:#92400e}:root[data-theme=dark] .badge--private{border-color:#f59e0b;background:#452b08;color:#fbbf24}.badge--free{border:1px solid #3b82f6;background:#eff6ff;color:#1e40af}:root[data-theme=dark] .badge--free{border-color:#3b82f6;background:#172554;color:#93c5fd}.badge--premium{border:1px solid #a855f7;background:#faf5ff;color:#7e22ce}:root[data-theme=dark] .badge--premium{border-color:#a855f7;background:#3b0764;color:#d8b4fe}.text-button{display:inline-flex;align-items:center;gap:8px;margin-bottom:22px;padding:0;background:transparent;color:var(--muted)}.subject-heading{display:grid;grid-template-columns:auto 1fr auto;gap:18px;align-items:start;margin-bottom:26px;padding-bottom:24px;border-bottom:1px solid var(--line)}.subject-heading h1{font-size:clamp(2.3rem,5vw,4rem)}.subject-heading__meta{min-width:160px;padding:16px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);text-align:right}.subject-heading__meta strong{display:block;font-size:2rem}.subject-heading__meta span,.subject-heading__meta small{display:block;color:var(--muted)}.question-list{display:grid;gap:12px}.question-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:0 10px 32px #1c2d220d}.question-card summary{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 20px;cursor:pointer;font-weight:720;list-style:none}.question-card summary::-webkit-details-marker{display:none}.question-card[open] summary svg{transform:rotate(180deg)}.question-card__body{display:grid;gap:18px;padding:0 20px 20px}.question-card__footer{padding-top:12px;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}.personal-note{padding:14px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface-soft)}.personal-note__header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.personal-note__header h4{margin:0;color:var(--accent)}.personal-note__input{width:100%;min-height:70px;margin-bottom:8px;padding:10px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);color:var(--text);resize:vertical;font-family:inherit;font-size:.9rem}.personal-note__loading{display:flex;align-items:center;gap:8px;padding:8px 0;color:var(--muted);font-size:.88rem}.personal-note__view{display:grid;gap:6px}.personal-note__view p{margin:0;line-height:1.6}.personal-note__actions{display:flex;align-items:center;gap:8px}.personal-note__status{font-size:.8rem;color:var(--muted)}.icon-button--xs{width:30px;height:30px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);display:inline-flex;align-items:center;justify-content:center;cursor:pointer}.spin{animation:spin .9s linear infinite}.spinner{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:48px 18px;color:var(--muted);font-size:.9rem}.content-section,.admin-panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}.content-section{padding:18px}.result-list{display:grid;gap:8px;margin-top:14px}.dashboard-layout{display:grid;grid-template-columns:340px 1fr;gap:18px;align-items:start}.admin-panel{padding:18px}.admin-panel--main{min-width:0}.stack-form{display:grid;gap:12px;margin-top:16px}.stack-form--wide{margin:22px 0;padding:18px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface-soft)}label{display:grid;gap:7px;color:var(--muted);font-size:.86rem;font-weight:680}input,textarea,select{width:100%;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);color:var(--text);outline:none}input,select{height:42px;padding:0 12px}textarea{resize:vertical;padding:12px;line-height:1.55}.form-field{display:grid;gap:6px}.primary-button,.danger-button,.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:0 14px;border-radius:var(--radius)}.primary-button{background:var(--accent);color:#fff}.danger-button{border:1px solid color-mix(in srgb,var(--danger) 30%,var(--line));background:var(--danger-soft);color:var(--danger)}.danger-button--icon{width:38px;min-height:38px;padding:0}.button{background:var(--surface);border:1px solid var(--line);color:var(--text)}.button--primary{width:100%;margin-top:4px;background:var(--accent);color:#fff}.button--small{min-height:34px;padding:0 12px;font-size:.85rem}.button:disabled{opacity:.6;cursor:not-allowed}.admin-list,.question-admin-list{display:grid;gap:8px;margin-top:18px}.admin-list__item{display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center;width:100%;min-height:46px;padding:8px;border:1px solid var(--line);border-radius:var(--radius);background:transparent;text-align:left;cursor:pointer}.admin-list__item.active{background:var(--accent-soft);border-color:color-mix(in srgb,var(--accent) 35%,var(--line))}.admin-list__item small{color:var(--muted)}.admin-heading{display:flex;justify-content:space-between;gap:16px;align-items:start}.inline-edit,.form-grid{display:grid;grid-template-columns:1fr 1.5fr;gap:10px}.question-admin-item{display:grid;gap:10px;padding:14px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}.question-admin-item__footer span,.compact{margin:0;color:var(--muted);font-size:.9rem}.note-item{cursor:default}.note-item__link{display:inline-flex;align-items:center;gap:8px;padding:0;border:0;background:transparent;color:var(--accent);font-size:1rem;text-align:left;cursor:pointer}.note-item__link:hover{text-decoration:underline}.dashboard-tabs{display:flex;gap:0;margin-bottom:22px;border-bottom:1px solid var(--line)}.dashboard-tab{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border:0;border-bottom:2px solid transparent;background:transparent;color:var(--muted);font-weight:680;cursor:pointer;white-space:nowrap}.dashboard-tab--active{border-bottom-color:var(--accent);color:var(--text)}.dashboard-tab:hover{color:var(--text)}.users-toolbar{display:flex;gap:12px;align-items:center;margin-bottom:18px}.users-filter{width:auto;min-width:150px}.user-table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}.user-table{width:100%;border-collapse:collapse;font-size:.9rem}.user-table th{padding:14px 16px;text-align:left;color:var(--muted);font-weight:680;font-size:.82rem;text-transform:uppercase;letter-spacing:.03em;border-bottom:1px solid var(--line);background:var(--surface-soft);white-space:nowrap}.user-table td{padding:12px 16px;border-bottom:1px solid var(--line);vertical-align:middle}.user-table tr:last-child td{border-bottom:0}.user-table tr:hover td{background:var(--surface-soft)}.user-table__name{font-weight:680}.user-role-select-wrap{display:inline-flex;align-items:center;gap:6px;position:relative}.user-role-select{width:auto;min-width:100px;height:34px;padding:0 28px 0 10px;font-size:.85rem;appearance:auto}.user-role-spinner{position:absolute;right:6px;color:var(--muted);pointer-events:none}.empty-state{padding:48px 18px;text-align:center}.toast{position:fixed;right:22px;bottom:22px;z-index:60;display:inline-flex;align-items:center;gap:10px;max-width:min(360px,calc(100vw - 32px));min-height:44px;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);color:var(--text)}.toast--success svg{color:var(--accent)}.toast--error{border-color:color-mix(in srgb,var(--danger) 35%,var(--line));background:var(--danger-soft)}.toast--error svg{color:var(--danger)}.toast--loading svg{color:var(--muted);animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.modal-overlay{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;padding:20px;background:#0006;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.modal{width:100%;max-width:420px;border:1px solid var(--line);border-radius:12px;background:var(--surface);box-shadow:0 24px 60px #0003;overflow:hidden}.modal__header{display:flex;align-items:center;justify-content:space-between;padding:18px 20px 0}.modal__header h2{font-size:1.25rem}.modal__tabs{display:flex;gap:0;margin:14px 20px 0;border-bottom:1px solid var(--line)}.modal__tab{flex:1;padding:10px 0;border:0;border-bottom:2px solid transparent;background:transparent;font-weight:680;cursor:pointer;color:var(--muted)}.modal__tab--active{border-bottom-color:var(--accent);color:var(--text)}.modal__error{margin:12px 20px 0;padding:10px 14px;border-radius:var(--radius);background:var(--danger-soft);color:var(--danger);font-size:.88rem}.modal__form{display:grid;gap:14px;padding:18px 20px 22px}@media(max-width:900px){.topbar{grid-template-columns:1fr auto}.brand{grid-column:1}.search-wrap{grid-column:1 / -1;grid-row:2}.topbar__actions{grid-column:2;grid-row:1}.subject-grid,.dashboard-layout{grid-template-columns:1fr}.subject-heading{grid-template-columns:auto 1fr}.subject-heading__meta{grid-column:1 / -1;text-align:left}}@media(max-width:620px){.page{width:min(100% - 24px,1180px);padding-top:28px}.topbar{padding:12px;gap:10px}.brand span:last-child{display:none}h1{font-size:2.45rem}.inline-edit,.form-grid{grid-template-columns:1fr}.admin-heading,.question-card__footer{align-items:stretch;flex-direction:column}}