/* ==========================================================================
   Lumen v3 · Design System
   Единый файл с токенами, базовыми стилями и переиспользуемыми компонентами
   ========================================================================== */

/* --------------------------------------------------------------------------
   01 · TOKENS
   -------------------------------------------------------------------------- */
:root{
  /* Page & surfaces */
  --page: #f5f2ec;
  --page-tint: #efebe2;
  --surface: #ffffff;
  --surface-warm: #faf7f0;

  /* Ink scale */
  --ink: #18181b;
  --ink-soft: #3f3f46;
  --muted: #71717a;

  /* Lines */
  --line: #e4e0d6;
  --line-soft: #eeeae0;

  /* Accent (terracotta) */
  --accent: #c2410c;
  --accent-soft: #fdf2e9;
  --accent-line: #f0c8a8;

  /* Semantic colors */
  --info: #0e7490;
  --info-soft: #ecfeff;
  --ok: #15803d;
  --ok-soft: #f0fdf4;
  --warn: #b45309;
  --warn-soft: #fefce8;

  /* Dark mode (for video/voice surfaces) */
  --dark: #0f0f0f;
  --dark-soft: #1a1815;

  /* Typography */
  --display: 'Fraunces', Georgia, serif;
  --ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;

  /* Layout */
  --maxw: 1440px;
  --sidebar: 220px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* Motion */
  --dur-fast: 150ms;
  --dur-base: 250ms;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* --------------------------------------------------------------------------
   02 · RESET & BASE
   -------------------------------------------------------------------------- */
*, *::before, *::after{box-sizing:border-box;margin:0;padding:0}
html{
  font-size:16px;
  -webkit-text-size-adjust:100%;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
body{
  background:var(--page);
  color:var(--ink);
  font-family:var(--ui);
  font-feature-settings:"ss01","cv11";
  line-height:1.5;
  min-height:100vh;
}

img, svg{display:block;max-width:100%}
button{font-family:inherit;border:none;background:none;cursor:pointer;color:inherit}
a{color:inherit;text-decoration:none}
a:focus-visible, button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

/* --------------------------------------------------------------------------
   03 · TYPOGRAPHY UTILITIES
   -------------------------------------------------------------------------- */
.t-display{font-family:var(--display);font-weight:400;letter-spacing:-0.025em;line-height:1.1}
.t-display em{font-style:italic;color:var(--accent)}
.t-ui{font-family:var(--ui)}
.t-mono{font-family:var(--mono);letter-spacing:0.05em}
.t-kicker{font-family:var(--mono);font-size:10px;letter-spacing:0.18em;text-transform:uppercase;color:var(--muted);font-weight:600}
.t-kicker.accent{color:var(--accent)}
.t-kicker::before{content:"— "}

/* --------------------------------------------------------------------------
   04 · LAYOUT PRIMITIVES
   -------------------------------------------------------------------------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px}
.stack{display:flex;flex-direction:column}
.row{display:flex;align-items:center}

/* --------------------------------------------------------------------------
   05 · MARKETING HEADER (for landing, manifesto, etc.)
   -------------------------------------------------------------------------- */
.m-header{
  padding:20px 48px;
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:40px;
  border-bottom:1px solid var(--line);
  background:var(--page);
  position:sticky;
  top:0;
  z-index:50;
}
.m-logo{display:flex;align-items:center;gap:12px;text-decoration:none}
.m-logomark{
  width:36px;height:36px;
  background:var(--ink);color:var(--page);
  display:grid;place-items:center;
  font-family:var(--display);font-weight:500;font-size:21px;font-style:italic;
  border-radius:9px;
}
.m-logotype{font-family:var(--display);font-size:24px;font-weight:500;letter-spacing:-0.02em}
.m-logotype em{font-style:italic;color:var(--accent)}

.m-nav{display:flex;gap:28px;justify-content:center}
.m-nav a{font-size:14px;color:var(--ink-soft);font-weight:500;padding:4px 0;position:relative;transition:color var(--dur-fast) var(--ease)}
.m-nav a:hover{color:var(--ink)}
.m-nav a.active{color:var(--ink)}
.m-nav a.active::after{content:"";position:absolute;bottom:-2px;left:0;right:0;height:1px;background:var(--accent)}

.m-header-right{display:flex;align-items:center;gap:18px}
.m-login{font-size:13px;font-weight:500;color:var(--ink)}

/* --------------------------------------------------------------------------
   06 · BUTTONS
   -------------------------------------------------------------------------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:11px 20px;
  border-radius:100px;
  font-size:13px;
  font-weight:500;
  white-space:nowrap;
  cursor:pointer;
  transition:all var(--dur-fast) var(--ease);
  text-decoration:none;
}
.btn-primary{background:var(--ink);color:var(--page)}
.btn-primary:hover{background:var(--ink-soft)}
.btn-primary::after{content:"→";font-family:var(--display);font-style:italic;font-size:15px}

.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#9c340b}
.btn-accent::after{content:"→";font-family:var(--display);font-style:italic;font-size:15px}

.btn-ghost{background:transparent;color:var(--ink-soft);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--ink);color:var(--ink)}

.btn-lg{padding:14px 26px;font-size:14px}
.btn-sm{padding:8px 14px;font-size:12px}

/* --------------------------------------------------------------------------
   07 · MARKETING FOOTER
   -------------------------------------------------------------------------- */
.m-footer{
  background:var(--ink);
  color:var(--page);
  padding:56px 48px 24px;
  margin-top:80px;
}
.m-footer-inner{max-width:var(--maxw);margin:0 auto}
.m-footer-top{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,0.1)}
.m-footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.m-footer-logomark{
  width:40px;height:40px;background:var(--accent);color:#fff;
  display:grid;place-items:center;
  font-family:var(--display);font-weight:500;font-size:24px;font-style:italic;
  border-radius:10px;
}
.m-footer-logotype{font-family:var(--display);font-size:26px;font-weight:500;letter-spacing:-0.02em;color:#fff}
.m-footer-logotype em{font-style:italic;color:var(--accent-line)}
.m-footer-tag{font-family:var(--mono);font-size:10px;text-transform:uppercase;letter-spacing:0.15em;color:#a1a1aa;line-height:1.7;max-width:280px}
.m-footer-col h4{font-family:var(--mono);font-size:10px;text-transform:uppercase;letter-spacing:0.18em;color:#a1a1aa;margin-bottom:14px;font-weight:600}
.m-footer-col ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.m-footer-col li a{font-size:13px;color:#d4d4d8;transition:color var(--dur-fast) var(--ease)}
.m-footer-col li a:hover{color:#fff}
.m-footer-bot{padding-top:24px;display:flex;justify-content:space-between;align-items:center;font-family:var(--mono);font-size:10px;letter-spacing:0.12em;text-transform:uppercase;color:#71717a}

/* --------------------------------------------------------------------------
   08 · CARDS (universal)
   -------------------------------------------------------------------------- */
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:24px;
}
.card-warm{background:var(--surface-warm)}
.card-accent{background:var(--accent-soft);border-color:var(--accent-line)}
.card-dark{background:var(--dark);color:var(--page);border-color:var(--dark)}

/* --------------------------------------------------------------------------
   09 · DEMO APP SHELL (sidebar + main)
   -------------------------------------------------------------------------- */
.app{
  display:grid;
  grid-template-columns:var(--sidebar) 1fr;
  min-height:100vh;
  background:var(--page);
}

.side{
  background:var(--surface-warm);
  border-right:1px solid var(--line);
  padding:24px 16px;
  display:flex;
  flex-direction:column;
  gap:20px;
  position:sticky;
  top:0;
  height:100vh;
  overflow-y:auto;
}

.side-logo{display:flex;align-items:center;gap:10px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.side-logo-mark{
  width:32px;height:32px;background:var(--ink);color:var(--page);
  display:grid;place-items:center;
  font-family:var(--display);font-weight:500;font-size:19px;font-style:italic;
  border-radius:9px;
}
.side-logo-type{font-family:var(--display);font-size:22px;font-weight:500;letter-spacing:-0.02em}
.side-logo-type em{font-style:italic;color:var(--accent)}

.side-user{
  display:flex;align-items:center;gap:10px;
  padding:10px 8px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:12px;
}
.side-ava{
  width:32px;height:32px;border-radius:50%;flex-shrink:0;
  background:var(--accent-soft);border:1px solid var(--accent-line);
  display:grid;place-items:center;
  font-family:var(--display);font-size:13px;font-weight:500;color:var(--accent);font-style:italic;
}
.side-user-info{min-width:0;flex:1}
.side-user-name{font-size:12.5px;font-weight:600;line-height:1.1}
.side-user-meta{font-family:var(--mono);font-size:9px;color:var(--muted);letter-spacing:0.05em;margin-top:2px}

.side-nav{display:flex;flex-direction:column;gap:2px}
.side-nav-lbl{font-family:var(--mono);font-size:9px;letter-spacing:0.15em;text-transform:uppercase;color:var(--muted);padding:8px 10px 4px;font-weight:600}

.nav-item{
  padding:9px 10px;
  font-size:13px;
  color:var(--ink-soft);
  border-radius:8px;
  display:flex;align-items:center;gap:10px;
  font-weight:500;
  text-decoration:none;
  transition:background var(--dur-fast) var(--ease);
}
.nav-item:hover{background:rgba(0,0,0,0.03)}
.nav-item.active{background:var(--ink);color:var(--page)}
.nav-ico{
  width:16px;height:16px;
  display:grid;place-items:center;
  font-family:var(--display);font-style:italic;font-weight:500;font-size:13px;
  opacity:0.7;
}
.nav-item.active .nav-ico{opacity:1}
.nav-count{margin-left:auto;font-family:var(--mono);font-size:10px;letter-spacing:0.05em;opacity:0.6;font-weight:600}
.nav-count.badge{background:var(--accent);color:#fff;padding:1px 7px;border-radius:100px;font-size:9px;opacity:1}

.side-streak{margin-top:auto;padding-top:16px;border-top:1px solid var(--line)}
.side-streak-head{display:flex;align-items:baseline;gap:8px;margin-bottom:4px}
.side-streak-n{
  font-family:var(--display);font-size:32px;font-style:italic;
  font-weight:400;letter-spacing:-0.04em;line-height:0.9;
  color:var(--accent);
}
.side-streak-lbl{font-family:var(--mono);font-size:9px;letter-spacing:0.1em;text-transform:uppercase;color:var(--muted);font-weight:600}
.side-streak-note{font-size:11px;color:var(--ink-soft);line-height:1.4}

/* --------------------------------------------------------------------------
   10 · MAIN CONTENT AREA IN APP
   -------------------------------------------------------------------------- */
.main{padding:28px 36px;display:flex;flex-direction:column;gap:24px}

.main-hdr{
  padding-bottom:18px;
  border-bottom:1px solid var(--line);
  display:flex;justify-content:space-between;align-items:flex-end;gap:20px;
}
.main-hdr-l{flex:1}
.main-lbl{font-family:var(--mono);font-size:10px;letter-spacing:0.18em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.main-title{font-family:var(--display);font-size:32px;font-weight:400;letter-spacing:-0.025em;line-height:1.05}
.main-title em{font-style:italic;color:var(--accent)}
.main-sub{font-size:13px;color:var(--ink-soft);margin-top:6px}

/* --------------------------------------------------------------------------
   11 · DEMO MODE BANNER
   -------------------------------------------------------------------------- */
.demo-banner{
  background:var(--ink);
  color:var(--page);
  padding:8px 48px;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:0.15em;
  text-transform:uppercase;
  font-weight:600;
  display:flex;justify-content:space-between;align-items:center;
  position:sticky;
  top:0;
  z-index:100;
}
.demo-banner .dot{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--accent);
  margin-right:10px;
  display:inline-block;
  animation:pulse 2s ease-in-out infinite;
  vertical-align:middle;
}
.demo-banner a{
  color:var(--accent-line);
  text-decoration:none;
  border-bottom:1px dashed rgba(240,200,168,0.3);
  padding-bottom:1px;
}
.demo-banner a:hover{color:#fff;border-color:#fff}
@keyframes pulse{
  0%,100%{opacity:1}
  50%{opacity:0.4}
}

/* --------------------------------------------------------------------------
   12 · RESPONSIVE
   -------------------------------------------------------------------------- */
@media (max-width:1100px){
  .m-header{padding:16px 24px}
  .m-nav{display:none}
  .m-footer{padding:40px 24px 20px}
  .m-footer-top{grid-template-columns:1fr 1fr;gap:32px}
  .demo-banner{padding:8px 24px;font-size:10px}
  .app{grid-template-columns:1fr}
  .side{position:fixed;left:-220px;top:0;z-index:200;transition:left var(--dur-base) var(--ease);box-shadow:4px 0 30px rgba(0,0,0,0.15)}
  .side.open{left:0}
  .main{padding:20px}
}

@media (max-width:640px){
  .m-footer-top{grid-template-columns:1fr}
  .main-title{font-size:24px}
}

/* --------------------------------------------------------------------------
   13 · UTILITIES
   -------------------------------------------------------------------------- */
.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}
.hidden{display:none!important}

/* --------------------------------------------------------------------------
   14 · ANIMATIONS
   -------------------------------------------------------------------------- */
@keyframes fadeIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}
.fade-in{animation:fadeIn var(--dur-base) var(--ease)}