/* ============================================================
   Design tokens — стиль design_style (Marque)
   ============================================================ */
:root {
  --accent: #FF5C38;
  --accent-ink: #0b0c0e;
  --font-sans: 'Onest', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  /* Dark theme (default) */
  --bg: #0a0b0d;
  --bg-grid: rgba(255,255,255,0.022);
  --surface: #121317;
  --surface-2: #181a1f;
  --surface-3: #1f2228;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.14);
  --text: #ECEDEE;
  --text-2: #9aa0a6;
  --text-3: #6b7177;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 12px 32px -8px rgba(0,0,0,.55);
  --shadow-lg: 0 24px 70px -18px rgba(0,0,0,.7);
  --radius: 14px;
  --radius-sm: 9px;
  --radius-lg: 22px;
}

.app-root[data-theme="light"] {
  --bg: #f4f3f1;
  --bg-grid: rgba(0,0,0,0.025);
  --surface: #ffffff;
  --surface-2: #faf9f7;
  --surface-3: #f0eeea;
  --border: rgba(20,18,16,0.10);
  --border-strong: rgba(20,18,16,0.18);
  --text: #16130f;
  --text-2: #5c574f;
  --text-3: #8c867c;
  --shadow: 0 1px 2px rgba(40,34,28,.06), 0 14px 34px -12px rgba(40,34,28,.16);
  --shadow-lg: 0 30px 70px -22px rgba(40,34,28,.28);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { background: #f4f3f1; }

.app-root {
  font-family: var(--font-sans);
  background:
    radial-gradient(1200px 600px at 50% -10%, color-mix(in oklab, var(--accent) 9%, transparent), transparent 60%),
    linear-gradient(var(--bg-grid) 1px, transparent 1px) 0 0 / 100% 34px,
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  letter-spacing: -0.011em;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 48px 20px 64px;
}

::selection { background: color-mix(in oklab, var(--accent) 35%, transparent); color: var(--text); }

/* Scrollbars */
.app-root ::-webkit-scrollbar { width: 11px; height: 11px; }
.app-root ::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 20px; border: 3px solid transparent; background-clip: padding-box; }
.app-root ::-webkit-scrollbar-thumb:hover { background: var(--text-3); background-clip: padding-box; }

.kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 500;
}
.mono { font-family: var(--font-mono); }

.btn {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.01em;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 10px 16px;
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px;
  transition: transform .12s ease, background .18s ease, border-color .18s ease, box-shadow .18s ease, opacity .18s;
  white-space: nowrap;
  user-select: none;
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-accent { background: var(--accent); color: var(--accent-ink); box-shadow: 0 6px 18px -6px color-mix(in oklab, var(--accent) 65%, transparent); }
.btn-accent:hover:not(:disabled) { box-shadow: 0 10px 26px -6px color-mix(in oklab, var(--accent) 75%, transparent); filter: brightness(1.05); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-ghost:hover { background: var(--surface-2); border-color: var(--text-3); }
.btn-soft { background: var(--surface-3); color: var(--text); }
.btn-soft:hover { background: color-mix(in oklab, var(--surface-3) 70%, var(--text-3)); }
.btn-lg { padding: 13px 22px; font-size: 15px; border-radius: 12px; }
.btn-sm { padding: 7px 12px; font-size: 13px; border-radius: 8px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.chip {
  font-size: 13px; font-weight: 500;
  padding: 6px 12px; border-radius: 999px;
  border: 1px solid var(--border-strong);
  color: var(--text-2);
  background: var(--surface-2);
  cursor: pointer;
  transition: all .15s ease;
  user-select: none;
}
.chip:hover { color: var(--text); border-color: var(--text-3); }
.chip[data-on="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

.tag {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .08em; text-transform: uppercase;
  padding: 4px 8px; border-radius: 6px; border: 1px solid var(--border-strong); color: var(--text-2);
}

@keyframes mq-fade-up { from { transform: translateY(13px); } to { transform: none; } }
@keyframes mq-fade { from { transform: translateY(5px); } to { transform: none; } }
@keyframes mq-scale-in { from { transform: scale(.985); } to { transform: none; } }
@keyframes mq-spin { to { transform: rotate(360deg); } }
@keyframes mq-pulse { 0%,100% { opacity: .35; } 50% { opacity: 1; } }
@keyframes mq-shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }
@keyframes mq-bar { 0% { transform: scaleY(.3);} 50%{transform: scaleY(1);} 100%{transform: scaleY(.3);} }
.route-enter { animation: mq-fade-up .45s cubic-bezier(.2,.7,.2,1) both; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

.app-root :focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
input, textarea, button { font-family: inherit; }
a { color: inherit; text-decoration: none; }

/* ---------- layout ---------- */
.topbar {
  width: 100%; max-width: 640px;
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 36px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -0.02em; }
.brand-mark {
  width: 26px; height: 26px; border-radius: 7px; flex-shrink: 0;
  background: var(--accent); color: var(--accent-ink);
  display: grid; place-items: center;
  box-shadow: 0 4px 14px -4px color-mix(in oklab, var(--accent) 70%, transparent);
}
.brand-mark svg { width: 15px; height: 15px; }

/* ---------- icons ---------- */
.icon { width: 16px; height: 16px; flex-shrink: 0; }
.icon-sm { width: 14px; height: 14px; flex-shrink: 0; }
.icon-lg { width: 28px; height: 28px; }

/* ---------- stepper ---------- */
.card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.stepper { display: flex; gap: 6px; margin-bottom: 22px; }
.step { flex: 1; }
.step-bar { height: 4px; border-radius: 99px; background: var(--surface-3); transition: background .3s ease; }
.step.done .step-bar { background: var(--accent); }
.step-label {
  font-family: var(--font-mono); font-size: 10px; margin-top: 7px;
  letter-spacing: .06em; text-transform: uppercase; color: var(--text-3);
  transition: color .3s ease;
}
.step.done .step-label { color: var(--text); }

.main-card { width: 100%; max-width: 640px; padding: 34px 36px 36px; }
@media (max-width: 520px) { .main-card { padding: 24px 20px 28px; } }

h1 { font-size: 28px; font-weight: 800; letter-spacing: -0.03em; margin: 0 0 6px; }
.sub { color: var(--text-2); font-size: 14.5px; margin: 0 0 28px; line-height: 1.55; }

.field-label {
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: .1em; text-transform: uppercase; color: var(--text-3);
  margin-bottom: 9px; display: flex; align-items: center; gap: 10px;
}
.prefix-row { display: flex; align-items: center; gap: 10px; margin-bottom: 24px; flex-wrap: wrap; }
.prefix-preview { font-size: 13px; color: var(--text-3); }
.prefix-preview b { color: var(--accent); font-weight: 600; }
.prefix-static {
  font-family: var(--font-mono); font-size: 15px; color: var(--text-2);
  background: var(--surface-3); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 11px 13px;
}
input.prefix-input {
  font-family: var(--font-mono); font-size: 15px;
  background: var(--surface-2); border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); padding: 11px 13px;
  color: var(--text); width: 130px; min-width: 0;
  transition: border-color .15s ease;
}
input.prefix-input::placeholder { color: var(--text-3); opacity: .7; }
input.prefix-input:focus { outline: none; border-color: var(--accent); }
input.prefix-input:not(:focus):placeholder-shown,
input.prefix-input:not(:focus)[value=""] { border-color: color-mix(in oklab, var(--accent) 55%, var(--border-strong)); }

.required-mark { color: var(--accent); font-size: 16px; line-height: 1; }

.field-hint {
  font-size: 12.5px;
  color: color-mix(in oklab, var(--accent) 80%, var(--text-2));
  background: color-mix(in oklab, var(--accent) 7%, var(--surface-2));
  border: 1px solid color-mix(in oklab, var(--accent) 30%, transparent);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin-bottom: 20px;
  margin-top: -16px;
  line-height: 1.5;
}
.field-hint::before { content: "⚠\00a0"; }
.app-root[data-theme="light"] .field-hint { color: color-mix(in oklab, var(--accent) 75%, #5a2a00); }

.drop-zone {
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface-2);
  padding: 34px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s ease, background .2s ease;
  margin-bottom: 24px;
}
.drop-zone:hover, .drop-zone.dragover { border-color: var(--accent); background: color-mix(in oklab, var(--accent) 6%, var(--surface-2)); }
.drop-icon { margin-bottom: 8px; color: var(--text-2); }
.drop-zone.has-file .drop-icon { color: var(--accent); }
.drop-title { font-weight: 600; font-size: 15px; }
.drop-hint { color: var(--text-3); font-size: 13px; margin-top: 4px; }
.drop-zone.has-file { border-style: solid; border-color: color-mix(in oklab, var(--accent) 55%, var(--border-strong)); }
.file-meta { font-family: var(--font-mono); font-size: 13px; color: var(--text-2); margin-top: 6px; }
.file-meta b { color: var(--accent); font-weight: 600; }

.btn-link {
  display: inline-flex; align-items: center; gap: 6px;
  background: transparent; border: none; cursor: pointer;
  font-family: var(--font-sans); font-size: 12.5px; font-weight: 500;
  color: var(--text-3); padding: 4px 6px; margin-top: 10px; border-radius: 6px;
  transition: color .15s ease;
}
.btn-link:hover { color: var(--accent); }

.error-box, .info-box {
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  font-size: 13.5px;
  line-height: 1.5;
  margin-top: 18px;
}
.error-box { background: color-mix(in oklab, #ff4d4d 12%, var(--surface-2)); border: 1px solid color-mix(in oklab, #ff4d4d 40%, transparent); color: #ffb3b3; white-space: pre-line; }
.app-root[data-theme="light"] .error-box { color: #9c1f1f; }
.info-box { background: color-mix(in oklab, var(--accent) 8%, var(--surface-2)); border-left: 3px solid var(--accent); color: var(--text-2); }
.info-box b { color: var(--text); }
.import-step { display: flex; gap: 10px; margin-top: 9px; align-items: baseline; }
.import-num { font-size: 10.5px; color: var(--accent); letter-spacing: .08em; flex-shrink: 0; }

.result { margin-top: 22px; border-top: 1px solid var(--border); padding-top: 22px; }
.result .kicker { margin-bottom: 12px; }
.result-row {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 12px 14px; margin-bottom: 10px;
}
.result-name { font-family: var(--font-mono); font-size: 13.5px; font-weight: 500; }
.result-size { font-family: var(--font-mono); font-size: 11.5px; color: var(--text-3); margin-top: 2px; }

.footer { margin-top: 28px; }
.footer-note { margin-top: 10px; font-size: 12px; color: var(--text-3); text-align: center; }
.footer-note a { color: var(--text-2); text-decoration: underline; text-underline-offset: 2px; }
.footer-note a:hover { color: var(--accent); }
.hidden { display: none !important; }