/* Shared by index.html and cabinet.html: tokens, notebook background, header, buttons, form controls, look panel.
   look.js sets --accent, --accent-dark, --on-accent, --font-body, --round, --scale and data-theme / data-bg / data-motion on <html>. */
/* Palette after Sferum: bright blue, violet for gradients, pastel tints, cool light background. */
:root {
  --bg: #f4f7fc;
  --surface: #ffffff;
  --ink: #1a1d29;
  --muted: #6d7885;
  --line: #e1e6ef;
  --blue: var(--accent, #0077ff);
  --on-blue: var(--on-accent, #ffffff);
  --violet: #7a5af8;
  --orange: #ff7a2f;
  --orange-2: #ff9b4f;
  --blue-soft: color-mix(in srgb, var(--blue) 12%, var(--surface));
  --grad: linear-gradient(135deg, var(--blue), var(--violet));
  --tint-blue: #e6f0ff;
  --tint-lilac: #efeaff;
  --tint-mint: #e2f6ec;
  --tint-peach: #ffefe3;
  --tint-pink: #ffe7f0;
  --red: #e64646;
  --ok: #19a15f;
  --ok-bg: #e2f6ec;
  --bad-bg: #ffe7e7;
  --grid: color-mix(in srgb, var(--blue) 10%, transparent);
  --margin-line: color-mix(in srgb, var(--red) 35%, transparent);
  --shadow: 0 1px 2px rgba(26, 29, 41, 0.05), 0 12px 32px -16px rgba(26, 29, 41, 0.18);
  --shadow-lift: 0 2px 6px rgba(26, 29, 41, 0.06), 0 30px 60px -28px rgba(26, 29, 41, 0.4);
  --font-body: "Golos Text", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-hand: "Caveat", "Segoe Print", cursive;
  --round: 1;
  --r-lg: calc(32px * var(--round));
  --r-md: calc(20px * var(--round));
  --r-sm: calc(14px * var(--round));
  --r-pill: calc(14px * var(--round));
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-pop: cubic-bezier(0.34, 1.56, 0.64, 1);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1117; --surface: #171b24; --ink: #edf0f5; --muted: #8f99a8; --line: #262c38;
    --blue: var(--accent-dark, #4d9dff); --on-blue: #0e1117; --violet: #a28bff;
    --tint-blue: #14243f; --tint-lilac: #221d3d; --tint-mint: #13301f; --tint-peach: #36261a; --tint-pink: #361a26;
    --red: #ff6b6b; --ok: #4fd18b; --ok-bg: #13301f; --bad-bg: #3a1b1b;
    --grid: color-mix(in srgb, var(--blue) 8%, transparent);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 12px 32px -16px rgba(0, 0, 0, 0.6);
    --shadow-lift: 0 2px 6px rgba(0, 0, 0, 0.35), 0 30px 60px -28px rgba(0, 0, 0, 0.8);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0e1117; --surface: #171b24; --ink: #edf0f5; --muted: #8f99a8; --line: #262c38;
  --blue: var(--accent-dark, #4d9dff); --on-blue: #0e1117; --violet: #a28bff;
  --tint-blue: #14243f; --tint-lilac: #221d3d; --tint-mint: #13301f; --tint-peach: #36261a; --tint-pink: #361a26;
  --red: #ff6b6b; --ok: #4fd18b; --ok-bg: #13301f; --bad-bg: #3a1b1b;
  --grid: color-mix(in srgb, var(--blue) 8%, transparent);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 12px 32px -16px rgba(0, 0, 0, 0.6);
  --shadow-lift: 0 2px 6px rgba(0, 0, 0, 0.35), 0 30px 60px -28px rgba(0, 0, 0, 0.8);
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  margin: 0;
  background-color: var(--bg); color: var(--ink);
  font-family: var(--font-body); font-size: 16px; line-height: 1.55;
  padding-bottom: 32px;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  zoom: var(--scale, 1);
  -webkit-font-smoothing: antialiased;
}

/* Page background: soft colour glow by default; squared, ruled or dotted notebook paper, or plain.
   The red notebook margin line only goes with the paper patterns. */
:root:not([data-bg]) body, [data-bg="soft"] body {
  background-image:
    radial-gradient(1100px 620px at 8% -8%, color-mix(in srgb, var(--blue) 16%, transparent), transparent 62%),
    radial-gradient(900px 620px at 100% 6%, color-mix(in srgb, var(--violet) 15%, transparent), transparent 62%),
    radial-gradient(800px 600px at 50% 105%, color-mix(in srgb, var(--blue) 9%, transparent), transparent 60%);
  background-attachment: fixed;
}
[data-bg="grid"] body {
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
}
[data-bg="lines"] body { background-image: linear-gradient(var(--grid) 1px, transparent 1px); background-size: 100% 30px; }
[data-bg="dots"] body { background-image: radial-gradient(circle, color-mix(in srgb, var(--blue) 22%, transparent) 1.2px, transparent 1.6px); background-size: 22px 22px; }
[data-bg="grid"] body::before, [data-bg="lines"] body::before {
  content: ""; position: fixed; top: 0; bottom: 0; z-index: -1; pointer-events: none;
  left: max(28px, calc(50vw - 620px)); width: 2px; background: var(--margin-line);
}

.wrap { max-width: 1180px; margin: 0 auto; }
h1, h2, h3, h4 { font-weight: 700; line-height: 1.1; margin: 0; text-wrap: balance; letter-spacing: -0.025em; }
p { margin: 0; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; border-radius: 6px; }

/* Header: sticky glass bar */
/* Header: logo on the left, one bright button on the right; turns into a glass bar once the page scrolls */
header.top {
  position: sticky; top: 8px; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  margin: 8px auto 0; max-width: 1240px; padding: 10px 14px;
  border: 1px solid transparent; border-radius: calc(var(--r-pill) * 2);
  transition: background 0.3s, box-shadow 0.3s var(--ease-out), border-color 0.3s;
}
header.top.scrolled {
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  backdrop-filter: blur(14px) saturate(1.4); -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-color: color-mix(in srgb, var(--line) 70%, transparent);
  box-shadow: var(--shadow);
}
.brand { font-weight: 800; font-size: 30px; letter-spacing: -0.035em; color: var(--blue); text-decoration: none; display: flex; align-items: center; gap: 12px; }
/* logo: a page with a thick left margin on a gradient tile */
.brand-mark { width: 50px; height: 50px; flex: none; border-radius: calc(15px * var(--round)); background: var(--grad); display: grid; place-items: center; transform: rotate(-6deg); transition: transform 0.4s var(--ease-pop); box-shadow: 0 10px 22px -8px var(--blue); }
.brand-mark::before { content: ""; width: 17px; height: 23px; border: 3px solid #fff; border-left-width: 7px; border-radius: 3px; }
.brand:hover .brand-mark { transform: rotate(0); }
nav { display: flex; gap: 4px; font-size: 15px; }
nav a { text-decoration: none; color: var(--muted); padding: 8px 14px; border-radius: var(--r-pill); transition: color 0.2s, background 0.2s; }
nav a:hover { color: var(--ink); background: var(--bg); }
nav a[aria-current="page"] { color: var(--ink); font-weight: 600; background: var(--surface); box-shadow: var(--shadow); }
/* pages cross-fade into each other; the header stays in place (browsers without view transitions just load the page) */
@view-transition { navigation: auto; }
header.top { view-transition-name: site-header; }
.auth-buttons, #user-info { display: flex; gap: 8px; align-items: center; }
.auth-buttons .btn { font-size: 14px; padding: 10px 18px; }
#user-name { font-size: 14px; color: var(--muted); padding: 0 6px; }
/* the bright "Личный кабинет" button */
.btn.btn-lk { font-size: 16px; font-weight: 700; padding: 15px 30px; border: 0; color: #fff; background: linear-gradient(135deg, var(--orange-2), var(--orange)); box-shadow: 0 14px 30px -12px var(--orange); }
.btn.btn-lk:hover { box-shadow: 0 18px 36px -12px var(--orange); }

/* Buttons */
.btn {
  font: 600 15px var(--font-body); padding: 14px 24px; border-radius: var(--r-pill);
  border: 1.5px solid var(--blue); background: var(--blue); color: var(--on-blue);
  text-decoration: none; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out), background 0.2s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 22px -12px var(--blue); }
.btn:active { transform: translateY(0); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--ink); box-shadow: none; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; box-shadow: none; }

/* Form controls */
label, legend { font-weight: 500; font-size: 14px; }
input[type="text"], input[type="email"], input[type="password"], select, textarea {
  width: 100%; font: 400 15px var(--font-body); color: var(--ink);
  background: var(--bg); border: 1.5px solid transparent; border-radius: var(--r-sm); padding: 13px 16px;
  transition: border-color 0.2s, background 0.2s;
}
input:focus, select:focus, textarea:focus { border-color: var(--blue); background: var(--surface); outline: none; }
input:disabled { opacity: 0.65; }
textarea { resize: vertical; }

.ok-msg { font-size: 14px; color: var(--ok); background: var(--ok-bg); padding: 12px 16px; border-radius: var(--r-sm); }
/* Django form errors and one-off messages (saved, signed in) */
.errorlist { list-style: none; margin: 4px 0 0; padding: 0; color: var(--red); font-size: 13px; }
.flash { margin: 16px 8px 0; display: grid; gap: 8px; }
.flash p { font-size: 15px; color: var(--ok); background: var(--ok-bg); padding: 12px 16px; border-radius: var(--r-sm); }

.panel { background: var(--surface); border-radius: var(--r-lg); }

/* Scroll reveal; only hides content when JS is running */
.js [data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out); }
.js [data-reveal].in { opacity: 1; transform: none; }

/* Look panel (built by look.js) */
.look-fab {
  position: fixed; right: max(16px, env(safe-area-inset-right, 0px)); bottom: 16px; z-index: 900;
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 18px 12px 14px;
  font: 600 15px var(--font-body); color: var(--on-blue); background: var(--grad);
  border: 0; border-radius: var(--r-pill); box-shadow: var(--shadow-lift); cursor: pointer;
  transition: transform 0.3s var(--ease-pop);
}
.look-fab:hover { transform: translateY(-2px) rotate(-2deg); }
.look-fab svg { width: 20px; height: 20px; }
.look-panel {
  position: fixed; top: 10px; right: 10px; bottom: 10px; z-index: 1100; width: min(380px, calc(100vw - 20px));
  overflow-y: auto; overscroll-behavior: contain; padding: 22px;
  background: var(--surface); color: var(--ink); border-radius: var(--r-lg); box-shadow: var(--shadow-lift);
  transform: translateX(calc(100% + 24px)); visibility: hidden;
  transition: transform 0.45s var(--ease-out), visibility 0s linear 0.45s; /* hide only after sliding out */
}
.look-panel.open { transform: none; visibility: visible; transition: transform 0.45s var(--ease-out), visibility 0s; }
.look-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.look-head h2 { font-size: 24px; }
.look-close { background: var(--bg); border: 0; width: 36px; height: 36px; border-radius: 50%; font-size: 22px; line-height: 1; color: var(--muted); cursor: pointer; }
.look-group { border: 0; margin: 0 0 20px; padding: 0; display: grid; gap: 10px; min-width: 0; }
.look-group legend { padding: 0; margin-bottom: 10px; font-weight: 600; }
.look-opts { display: flex; flex-wrap: wrap; gap: 6px; }
.look-opts label { position: relative; font-size: 14px; font-weight: 500; padding: 8px 14px; border-radius: var(--r-pill); background: var(--bg); cursor: pointer; transition: background 0.2s, color 0.2s; }
.look-opts input { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; }
.look-opts label:has(input:checked) { background: var(--blue); color: var(--on-blue); }
.look-opts label:has(input:focus-visible), .look-swatches label:has(input:focus-visible) { outline: 2px solid var(--red); outline-offset: 2px; }
.look-swatches { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.look-swatches label { position: relative; width: 34px; height: 34px; border-radius: 50%; background: var(--c); cursor: pointer; box-shadow: inset 0 0 0 2px color-mix(in srgb, #fff 30%, transparent); transition: transform 0.25s var(--ease-pop); }
.look-swatches label:hover { transform: scale(1.1); }
.look-swatches input[type="radio"] { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; }
.look-swatches label:has(input:checked) { box-shadow: 0 0 0 3px var(--surface), 0 0 0 5px var(--c); }
.look-swatches .custom { width: auto; height: 34px; padding: 0 12px 0 6px; display: inline-flex; align-items: center; gap: 6px; border-radius: var(--r-pill); background: var(--bg); font-size: 14px; font-weight: 500; }
.look-swatches .custom input { width: 24px; height: 24px; padding: 0; border: 0; border-radius: 50%; background: none; cursor: pointer; }
.look-bgs { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 8px; }
.look-bgs label { position: relative; display: grid; gap: 6px; justify-items: center; font-size: 13px; font-weight: 500; cursor: pointer; }
.look-bgs label i { width: 100%; aspect-ratio: 1; border-radius: var(--r-sm); background-color: var(--bg); border: 2px solid transparent; transition: border-color 0.2s; }
.look-bgs label:has(input:checked) i { border-color: var(--blue); }
.look-bgs input { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; }
.look-bgs .p-soft i { background-image: radial-gradient(circle at 20% 15%, color-mix(in srgb, var(--blue) 35%, transparent), transparent 60%), radial-gradient(circle at 90% 30%, color-mix(in srgb, var(--violet) 35%, transparent), transparent 60%); }
.look-bgs .p-grid i { background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px); background-size: 10px 10px; }
.look-bgs .p-lines i { background-image: linear-gradient(var(--grid) 1px, transparent 1px); background-size: 100% 11px; }
.look-bgs .p-dots i { background-image: radial-gradient(circle, color-mix(in srgb, var(--blue) 30%, transparent) 1px, transparent 1.4px); background-size: 9px 9px; }
.look-range { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 12px; align-items: center; }
.look-range input { grid-column: 1 / -1; width: 100%; accent-color: var(--blue); }
.look-range output { font-size: 14px; color: var(--muted); }
.look-switch { display: flex; justify-content: space-between; align-items: center; gap: 12px; font-weight: 600; cursor: pointer; }
.look-switch input { appearance: none; width: 46px; height: 28px; border-radius: 99px; background: var(--line); position: relative; cursor: pointer; transition: background 0.2s; margin: 0; }
.look-switch input::after { content: ""; position: absolute; top: 3px; left: 3px; width: 22px; height: 22px; border-radius: 50%; background: #fff; transition: transform 0.25s var(--ease-out); }
.look-switch input:checked { background: var(--blue); }
.look-switch input:checked::after { transform: translateX(18px); }
.look-reset { width: 100%; margin-top: 4px; }
.look-scrim { position: fixed; inset: 0; z-index: 1050; background: rgba(15, 21, 28, 0.25); opacity: 0; visibility: hidden; transition: opacity 0.3s, visibility 0s linear 0.3s; }
.look-scrim.open { opacity: 1; visibility: visible; transition: opacity 0.3s, visibility 0s; }

@media (max-width: 760px) {
  /* the page links move to a second row of the header */
  header.top { padding-left: 16px; flex-wrap: wrap; row-gap: 6px; }
  nav { order: 3; width: 100%; justify-content: center; font-size: 14px; }
  nav a { padding: 7px 12px; }
  body::before { display: none; }
  .look-fab span { display: none; }
  .look-fab { padding: 14px; }
}
@media (max-width: 600px) {
  .brand { font-size: 24px; gap: 10px; }
  .brand-mark { width: 42px; height: 42px; }
  .btn.btn-lk { font-size: 14px; padding: 12px 18px; }
}
@media (max-width: 440px) {
  header.top { gap: 8px; padding: 8px; }
  .brand { font-size: 21px; gap: 8px; }
  .brand-mark { width: 38px; height: 38px; }
  .auth-buttons, #user-info { gap: 6px; }
  .auth-buttons .btn { font-size: 13px; padding: 8px 12px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  @view-transition { navigation: none; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; transition-delay: 0s !important; animation-delay: 0s !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}
[data-motion="off"] { scroll-behavior: auto; }
[data-motion="off"] *, [data-motion="off"] *::before, [data-motion="off"] *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; transition-delay: 0s !important; animation-delay: 0s !important; }
[data-motion="off"].js [data-reveal] { opacity: 1; transform: none; }