/* ============================================================
   Сенсей — cabinet · "Pop" design system
   Matches landing/public/index.html (coral · blue · yellow · mint).
   Light + dark via prefers-color-scheme, with optional data-theme
   override (toggle wired by tiny per-page inline scripts).
   ============================================================ */

/* ---------- TOKENS ---------- */
:root {
  --coral:#FF477E;  --coral-2:#FF6FA3;
  --blue:#3B5BFF;   --blue-2:#5C82FF;
  --yellow:#FFC93C; --yellow-2:#FFDF7E;
  --mint:#1FD3A8;   --violet:#8B5CF6;

  --bg:#FBF8FF;
  --bg-2:#F1ECFF;
  --surface:#FFFFFF;
  --surface-2:#F7F4FF;
  --ink:#1A1636;
  --muted:#5E5A7D;
  --line:rgba(26,22,54,.10);

  --shadow:0 18px 40px -20px rgba(59,91,255,.35), 0 8px 18px -12px rgba(255,71,126,.20);
  --shadow-lift:0 30px 60px -24px rgba(59,91,255,.45), 0 12px 26px -14px rgba(255,71,126,.28);

  --radius:30px;
  --radius-sm:18px;
  --grad:linear-gradient(120deg,var(--coral),var(--blue));
  --font:ui-rounded,"SF Pro Rounded","Segoe UI Rounded",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
:root[data-theme="dark"] {
  --bg:#0D0B22;
  --bg-2:#151234;
  --surface:#1A1740;
  --surface-2:#221E4E;
  --ink:#F4F1FF;
  --muted:#AEA9D6;
  --line:rgba(255,255,255,.12);
  --shadow:0 22px 50px -22px rgba(0,0,0,.7), 0 8px 20px -12px rgba(59,91,255,.35);
  --shadow-lift:0 34px 70px -26px rgba(0,0,0,.8), 0 12px 28px -14px rgba(255,71,126,.30);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:#0D0B22; --bg-2:#151234; --surface:#1A1740; --surface-2:#221E4E;
    --ink:#F4F1FF; --muted:#AEA9D6; --line:rgba(255,255,255,.12);
    --shadow:0 22px 50px -22px rgba(0,0,0,.7), 0 8px 20px -12px rgba(59,91,255,.35);
    --shadow-lift:0 34px 70px -26px rgba(0,0,0,.8), 0 12px 28px -14px rgba(255,71,126,.30);
  }
}

/* ---------- BASE ---------- */
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3 { margin: 0; line-height: 1.1; letter-spacing: -.02em; font-weight: 800; }

/* soft blurred background blobs — decorative, on every surface */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(520px 520px at -8% -12%, color-mix(in srgb,var(--coral) 42%,transparent), transparent 60%),
    radial-gradient(480px 480px at 108% -6%,  color-mix(in srgb,var(--blue) 38%,transparent),  transparent 60%),
    radial-gradient(420px 420px at 22% 112%,  color-mix(in srgb,var(--yellow) 34%,transparent), transparent 60%),
    radial-gradient(360px 360px at 112% 108%, color-mix(in srgb,var(--mint) 30%,transparent),   transparent 60%);
  filter: blur(8px);
}
:root[data-theme="dark"] body::before { opacity: .8; }

/* ---------- MASCOT ---------- */
.cat { width: 44px; height: 44px; flex: 0 0 auto; display: block;
  filter: drop-shadow(0 6px 12px rgba(59,91,255,.28)); }
.avatar { width: 34px; height: 34px; flex: 0 0 auto; display: block;
  filter: drop-shadow(0 4px 8px rgba(59,91,255,.25)); }

/* ---------- BUTTONS (shared) ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: inherit; font-weight: 800; font-size: 14px;
  padding: 11px 18px; border-radius: 100px; cursor: pointer;
  border: 1.5px solid var(--line); background: var(--surface); color: var(--ink);
  transition: transform .18s, box-shadow .18s, border-color .18s, color .18s;
  white-space: nowrap;
}
.btn:hover { border-color: var(--coral); color: var(--coral); transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn.primary {
  border: none; color: #fff;
  background: var(--grad);
  box-shadow: 0 12px 24px -12px rgba(59,91,255,.6);
}
.btn.primary:hover { color: #fff; transform: translateY(-3px) scale(1.02); box-shadow: var(--shadow-lift); }
.btn.ghost {
  background: color-mix(in srgb,var(--surface) 70%,transparent);
  border: 1.5px solid var(--line);
}
.btn.ghost:hover { border-color: var(--coral); color: var(--coral); }

/* theme toggle (created by per-page inline script) */
.theme-btn {
  width: 42px; height: 42px; flex: 0 0 auto; padding: 0;
  border: 1.5px solid var(--line); border-radius: 50%;
  background: var(--surface-2); color: var(--ink);
  cursor: pointer; font-size: 1.05rem; line-height: 1;
  display: grid; place-items: center;
  transition: transform .2s, box-shadow .2s;
}
.theme-btn:hover { transform: rotate(-12deg) scale(1.08); }
.theme-btn.fixed-tr { position: fixed; top: 16px; right: 16px; z-index: 200; box-shadow: var(--shadow); }
.theme-btn.fixed-br { position: fixed; bottom: 20px; right: 20px; z-index: 200; box-shadow: var(--shadow-lift); }

/* ============================================================
   CHAT (index.html) — kid-facing
   ============================================================ */
.app {
  display: flex; flex-direction: column; height: 100vh;
  max-width: 780px; margin: 0 auto;
}

.topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; margin: 12px;
  background: color-mix(in srgb,var(--surface) 82%,transparent);
  backdrop-filter: blur(14px) saturate(1.3);
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.topbar h1 { font-size: 17px; font-weight: 800; }
.topbar .sub { font-size: 12px; color: var(--muted); font-weight: 600; }
.spacer { flex: 1; }

.pill {
  font-size: 12px; font-weight: 700; color: var(--blue);
  background: color-mix(in srgb,var(--blue) 12%,transparent);
  border: 1px solid color-mix(in srgb,var(--blue) 22%,transparent);
  border-radius: 999px; padding: 5px 12px; white-space: nowrap;
}
:root[data-theme="dark"] .pill { color: var(--blue-2); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .pill { color: var(--blue-2); } }

/* subject chooser */
.subjects {
  display: flex; gap: 8px; flex-wrap: wrap;
  padding: 4px 16px 8px;
}
.chip {
  border: 1.5px solid var(--line);
  background: color-mix(in srgb,var(--surface) 80%,transparent);
  backdrop-filter: blur(8px);
  border-radius: 999px; padding: 8px 16px; cursor: pointer;
  font-size: 14px; font-weight: 700; color: var(--muted);
  transition: transform .16s, border-color .16s, color .16s, box-shadow .16s;
}
.chip:hover { transform: translateY(-2px); color: var(--ink); border-color: var(--coral); }
.chip.active {
  color: #fff; border-color: transparent;
  background: var(--grad);
  box-shadow: 0 10px 20px -10px rgba(59,91,255,.55);
}

/* messages */
.messages {
  flex: 1; overflow-y: auto;
  padding: 14px 16px 20px;
  display: flex; flex-direction: column; gap: 14px;
}
.msg { display: flex; gap: 10px; max-width: 88%; align-items: flex-end; }
.msg .bubble {
  padding: 11px 15px; border-radius: 20px; line-height: 1.45;
  white-space: pre-wrap; word-wrap: break-word; font-size: 15px;
}
.msg.assistant { align-self: flex-start; }
.msg.assistant .bubble {
  background: var(--surface); color: var(--ink);
  border: 1px solid var(--line); border-bottom-left-radius: 6px;
  box-shadow: var(--shadow);
}
.msg.user { align-self: flex-end; flex-direction: row-reverse; }
.msg.user .bubble {
  color: #fff; border-bottom-right-radius: 6px;
  background: linear-gradient(135deg,var(--coral),var(--coral-2));
  box-shadow: 0 12px 24px -14px rgba(255,71,126,.6);
}
.msg .bubble img {
  max-width: 220px; border-radius: 12px; margin-top: 8px; display: block;
}

/* typing indicator (bubble.typing) */
.typing { color: var(--muted); font-size: 14px; font-style: italic; }
.msg.assistant .bubble.typing {
  color: var(--muted); font-style: italic;
  animation: breathe 1.6s ease-in-out infinite;
}
@keyframes breathe { 0%,100% { opacity: .6; } 50% { opacity: 1; } }

/* composer */
.composer {
  display: flex; gap: 8px; align-items: flex-end;
  padding: 12px; margin: 4px 12px 12px;
  background: color-mix(in srgb,var(--surface) 82%,transparent);
  backdrop-filter: blur(14px) saturate(1.3);
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.composer textarea {
  flex: 1; resize: none; font: inherit; font-size: 15px;
  border: 1.5px solid var(--line); border-radius: var(--radius-sm);
  padding: 11px 14px; max-height: 140px;
  background: var(--surface-2); color: var(--ink);
  transition: border-color .16s;
}
.composer textarea:focus { outline: none; border-color: var(--coral); }
.composer textarea::placeholder { color: var(--muted); }
.iconbtn {
  flex: 0 0 auto; width: 46px; height: 46px; padding: 0;
  border: 1.5px solid var(--line); border-radius: 50%;
  background: var(--surface-2); color: var(--ink);
  cursor: pointer; font-size: 18px; line-height: 1;
  display: grid; place-items: center;
  transition: transform .16s, border-color .16s;
}
.iconbtn:hover { transform: translateY(-2px) scale(1.05); border-color: var(--coral); }
/* send button — circular gradient (scoped so it stays a pill elsewhere) */
#send {
  flex: 0 0 auto; width: 46px; height: 46px; padding: 0;
  border-radius: 50%; font-size: 16px;
}
.preview { padding: 0 20px 4px; }
.preview img {
  max-height: 96px; border-radius: 14px;
  border: 1.5px solid var(--line); box-shadow: var(--shadow);
}

/* ============================================================
   LOGIN (login.html)
   ============================================================ */
.center { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.loginbox {
  position: relative;
  background: linear-gradient(160deg,var(--surface),var(--surface-2));
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-lift);
  padding: 36px 30px; width: 100%; max-width: 380px; text-align: center;
}
.loginbox .cat { margin: 0 auto 6px; }
.loginbox h1 {
  margin: 10px 0 6px; font-size: 30px;
  background: linear-gradient(115deg,var(--ink) 30%,var(--blue) 65%,var(--coral));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.loginbox p { color: var(--muted); margin: 0 0 20px; font-size: 14px; font-weight: 500; }
.loginbox input {
  width: 100%; padding: 13px 16px; font: inherit; font-size: 15px;
  border: 1.5px solid var(--line); border-radius: var(--radius-sm);
  background: var(--surface); color: var(--ink); margin-bottom: 12px;
  transition: border-color .16s;
}
.loginbox input:focus { outline: none; border-color: var(--coral); }
.err { color: var(--coral); font-size: 13px; font-weight: 600; min-height: 18px; }

/* ============================================================
   PARENT DASHBOARD (parent.html) — calmer, same system
   ============================================================ */
.wrap { max-width: 880px; margin: 0 auto; padding: 24px 16px 80px; }
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 22px 24px; margin-bottom: 18px;
}
.card h2 { margin: 0 0 12px; font-size: 17px; font-weight: 800; }

.muted { color: var(--muted); }
a.link { color: var(--coral); text-decoration: none; font-weight: 700; }
a.link:hover { text-decoration: underline; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

select, input.text {
  padding: 11px 14px; font: inherit; font-size: 14px;
  border: 1.5px solid var(--line); border-radius: var(--radius-sm);
  background: var(--surface-2); color: var(--ink);
  transition: border-color .16s;
}
select:focus, input.text:focus { outline: none; border-color: var(--coral); }

.subject-h {
  margin: 16px 0 8px; font-weight: 800; font-size: 12px;
  text-transform: uppercase; letter-spacing: .06em; color: var(--coral);
}
.skill-row {
  display: grid; grid-template-columns: 1fr 120px 46px; gap: 12px;
  align-items: center; margin: 10px 0; font-size: 14px; font-weight: 600;
}
.bar {
  height: 12px; background: var(--surface-2);
  border-radius: 999px; overflow: hidden;
  border: 1px solid var(--line);
}
.bar > i {
  display: block; height: 100%; border-radius: 999px;
  background: linear-gradient(90deg,var(--coral),var(--yellow));
  box-shadow: 0 0 12px -2px color-mix(in srgb,var(--coral) 60%,transparent);
}

.log-item {
  border-left: 3px solid transparent;
  border-image: linear-gradient(180deg,var(--coral),var(--blue)) 1;
  padding: 8px 0 8px 14px; margin: 10px 0; font-size: 14px;
}
.log-item .when { color: var(--muted); font-size: 12px; font-weight: 600; }

.note {
  font-size: 13.5px; color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 8px 12px; margin: 8px 0;
}

/* ---------- MOTION SAFETY ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}