:root {
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, monospace;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow: 0 18px 60px rgb(0 0 0 / 18%);
  --accent: #7c6cf2;
  --accent-strong: #6654e8;
  --danger: #dc5f6d;
  --success: #3ca77a;
}

html[data-theme="dark"] {
  --bg: #0d0e12;
  --surface: #14161c;
  --surface-raised: #1b1e26;
  --surface-hover: #222631;
  --text: #f4f5f8;
  --text-muted: #9ca3b5;
  --border: #292d38;
  --sidebar: #101116;
  --input: #111319;
}

html[data-theme="light"] {
  --bg: #f5f5f8;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --surface-hover: #f0effa;
  --text: #1e2028;
  --text-muted: #686f80;
  --border: #dfe1e8;
  --sidebar: #ffffff;
  --input: #fafafe;
  --shadow: 0 18px 60px rgb(34 31 64 / 10%);
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--bg); color: var(--text); font-family: var(--font-sans); }
body { min-height: 100vh; margin: 0; background: var(--bg); }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button { color: inherit; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 780px; font-size: clamp(2.3rem, 5vw, 4.7rem); line-height: .98; letter-spacing: -.055em; }
h2 { font-size: 1.45rem; letter-spacing: -.025em; }
h3 { margin-bottom: var(--space-2); }
p { line-height: 1.65; }
.muted, small { color: var(--text-muted); }
.eyebrow { color: var(--text-muted); font-size: .73rem; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; }
.icon { width: 20px; height: 20px; flex: 0 0 auto; }

.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 750; letter-spacing: -.02em; }
.brand-mark { display: inline-grid; width: 32px; height: 32px; place-items: center; border-radius: 10px; color: white; background: var(--accent); }
.public-header { display: flex; min-height: 72px; align-items: center; justify-content: space-between; padding: 0 clamp(20px, 5vw, 72px); border-bottom: 1px solid var(--border); }
.public-header nav { display: flex; align-items: center; gap: var(--space-5); }
.public-shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: clamp(56px, 9vw, 120px) 0; }
.hero { display: grid; grid-template-columns: 1.35fr .65fr; gap: clamp(40px, 8vw, 100px); align-items: center; }
.hero > div > p { max-width: 680px; color: var(--text-muted); font-size: 1.12rem; }

.panel { border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow); }
.preview { padding: var(--space-6); transform: rotate(1deg); }
.preview h2 { margin: var(--space-4) 0 var(--space-5); }
.status { display: inline-block; padding: 6px 10px; border-radius: 999px; color: #b9f1d8; background: rgb(60 167 122 / 18%); font-size: .76rem; font-weight: 700; }
html[data-theme="light"] .status { color: #247151; }
.preview-note { padding: var(--space-4) 0; border-top: 1px solid var(--border); }
.preview-note p { margin: 4px 0 0; color: var(--text-muted); font-size: .9rem; }

.button-row { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; }
.button { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; gap: 9px; padding: 0 18px; border: 1px solid var(--accent); border-radius: var(--radius-sm); color: white; background: var(--accent); cursor: pointer; font-weight: 700; }
.button:hover { background: var(--accent-strong); }
.button.secondary { color: var(--text); border-color: var(--border); background: var(--surface); }
.button.compact { min-height: 36px; padding: 0 13px; }
.button.telegram { width: 100%; background: #2aabee; border-color: #2aabee; }
.button.danger { background: transparent; border-color: var(--danger); color: var(--danger); }
.button:disabled { cursor: wait; opacity: .65; }

.auth-grid { display: grid; grid-template-columns: 1fr minmax(320px, 480px); gap: clamp(40px, 9vw, 120px); align-items: start; }
.auth-grid h1 { font-size: clamp(2.4rem, 5vw, 4rem); }
.auth-card { padding: clamp(24px, 5vw, 40px); }
.form-stack { display: grid; gap: var(--space-4); }
label { display: grid; gap: 7px; color: var(--text-muted); font-size: .85rem; font-weight: 650; }
input, textarea, select { width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm); outline: none; color: var(--text); background: var(--input); }
input:focus, textarea:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgb(124 108 242 / 16%); }
textarea { resize: vertical; line-height: 1.6; }
.divider { display: flex; align-items: center; gap: var(--space-3); margin: var(--space-5) 0; color: var(--text-muted); font-size: .8rem; }
.divider::before, .divider::after { content: ""; height: 1px; flex: 1; background: var(--border); }

.app-layout { display: grid; min-height: 100vh; grid-template-columns: 260px 1fr; }
.sidebar { position: sticky; top: 0; display: flex; height: 100vh; flex-direction: column; gap: var(--space-6); padding: var(--space-5); border-right: 1px solid var(--border); background: var(--sidebar); }
.main-nav { display: grid; gap: 6px; }
.main-nav a, .nav-button { display: flex; width: 100%; align-items: center; gap: 11px; min-height: 42px; padding: 0 12px; border: 0; border-radius: var(--radius-sm); background: transparent; cursor: pointer; }
.main-nav a:hover, .nav-button:hover { background: var(--surface-hover); }
.workspace-list { display: grid; gap: 6px; overflow-y: auto; }
.workspace-list a { display: flex; align-items: center; gap: 10px; padding: 8px; border-radius: var(--radius-sm); }
.workspace-list a:hover { background: var(--surface-hover); }
.workspace-list small { display: block; margin-top: 2px; font-size: .68rem; text-transform: uppercase; }
.workspace-mark { display: grid; width: 34px; height: 34px; flex: 0 0 auto; place-items: center; border: 1px solid var(--border); border-radius: 10px; background: var(--surface-raised); font-weight: 750; }
.workspace-mark.large { width: 48px; height: 48px; font-size: 1.1rem; }
.sidebar-footer { display: grid; gap: 4px; margin-top: auto; }
.sidebar-footer form { margin: 0; }
.app-main { min-width: 0; }
.topbar { display: flex; min-height: 92px; align-items: center; justify-content: space-between; padding: 0 clamp(24px, 5vw, 64px); border-bottom: 1px solid var(--border); }
.topbar h1 { margin: 3px 0 0; font-size: 1.45rem; letter-spacing: -.03em; }
.user-chip { padding: 9px 12px; border: 1px solid var(--border); border-radius: 999px; color: var(--text-muted); background: var(--surface); font-size: .84rem; }
.page-shell { width: min(1120px, calc(100% - 48px)); margin: 0 auto; padding: var(--space-7) 0 80px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; margin-bottom: var(--space-5); }
.section-heading h2 { margin: 5px 0 0; }
.workspace-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: var(--space-4); }
.workspace-card { display: flex; align-items: center; gap: var(--space-4); padding: var(--space-5); box-shadow: none; }
.workspace-card:hover, .note-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.workspace-card h2, .workspace-card p { margin: 0; }
.workspace-card p { margin-top: 4px; color: var(--text-muted); font-size: .85rem; }
.create-panel { margin: var(--space-5) 0; padding: var(--space-5); box-shadow: none; }
.create-panel summary { display: flex; align-items: center; gap: 9px; cursor: pointer; font-weight: 720; }
.create-panel[open] summary { margin-bottom: var(--space-5); }
.inline-form { display: flex; gap: var(--space-3); }
.notes-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--space-4); }
.note-card { min-height: 180px; padding: var(--space-5); box-shadow: none; transition: .18s ease; }
.note-card p { color: var(--text-muted); }
.note-card small { display: block; margin-top: auto; }
.empty { grid-column: 1 / -1; padding: var(--space-6); text-align: center; box-shadow: none; }
.note-editor { width: min(820px, 100%); margin: 0 auto; padding: clamp(24px, 5vw, 56px); }
.title-input { padding: 0 0 var(--space-4); border: 0; border-bottom: 1px solid var(--border); border-radius: 0; background: transparent; font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 760; letter-spacing: -.05em; }
.document-input { min-height: 56vh; padding: 0; border: 0; background: transparent; font-family: var(--font-mono); font-size: .95rem; }
.title-input:focus, .document-input:focus { box-shadow: none; }
.flash { margin-bottom: var(--space-4); padding: 12px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface); }
.flash.error { border-color: var(--danger); }
.flash.success { border-color: var(--success); }
.admin-nav { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: var(--space-6); }
.admin-nav a { padding: 9px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface); }
.admin-nav a:hover { border-color: var(--accent); }
.metric-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: var(--space-4); }
.metric-card { display: grid; gap: var(--space-3); padding: var(--space-5); box-shadow: none; }
.metric-card strong { font-size: 2rem; }
.admin-search { max-width: 620px; margin-bottom: var(--space-4); }
.table-wrap { overflow-x: auto; box-shadow: none; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 13px 15px; border-bottom: 1px solid var(--border); text-align: left; white-space: nowrap; }
th { color: var(--text-muted); font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; }
td small { display: block; margin-top: 3px; color: var(--text-muted); }
tbody tr:last-child td { border-bottom: 0; }

@media (max-width: 820px) {
  .hero, .auth-grid { grid-template-columns: 1fr; }
  .preview { transform: none; }
  .app-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; width: 100%; height: auto; border-right: 0; border-bottom: 1px solid var(--border); }
  .workspace-list, .main-nav { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
  .sidebar-footer { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  .public-header { padding: 0 18px; }
  .public-header nav > a:first-child { display: none; }
  .public-shell { width: min(100% - 28px, 1180px); padding-top: 42px; }
  .page-shell { width: min(100% - 28px, 1120px); padding-top: 28px; }
  .topbar { padding: 0 16px; }
  .user-chip { display: none; }
  .inline-form { flex-direction: column; }
  .notes-grid { grid-template-columns: 1fr; }
}