/* Fluency Engine - instrument, not edtech.
   Flat surfaces, 1px lines, 3px radii. No shadows, no gradients, no progress
   bars for "language level". Mobile first: the layout is designed at 375px
   and only gains columns above 720px. */

/* Archivo has no Cyrillic subset, so Golos Text carries the Russian labels.
   Unicode-range keeps each font on the script it was chosen for. */
@font-face {
  font-family: "Archivo";
  src: url("/fonts/archivo-latin.woff2") format("woff2");
  font-weight: 400 600;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+2122, U+2191, U+2193, U+2212;
}
@font-face {
  font-family: "Golos Text";
  src: url("/fonts/golos-cyrillic.woff2") format("woff2");
  font-weight: 400 600;
  font-display: swap;
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
@font-face {
  font-family: "Golos Text";
  src: url("/fonts/golos-latin.woff2") format("woff2");
  font-weight: 400 600;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("/fonts/jbmono-cyrillic.woff2") format("woff2");
  font-weight: 400 500;
  font-display: swap;
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("/fonts/jbmono-latin.woff2") format("woff2");
  font-weight: 400 500;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F;
}

:root {
  --ground: #e3e5e0;
  --panel: #f4f5f2;
  --ink: #15181a;
  --muted: #737b76;
  --line: #cbcfc7;
  --live: #cc3b1f;
  --deep: #1f4b47;

  --font-label: "Archivo", "Golos Text", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --radius: 3px;
  --gap: 12px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--ground);
  color: var(--ink);
  font-family: var(--font-label);
  font-size: 15px;
  line-height: 1.45;
  -webkit-text-size-adjust: 100%;
}

/* every number, timecode and transcript is monospaced - the whole point is
   comparing figures across days */
.num,
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* --- layout ------------------------------------------------------------ */

.app {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--gap) 88px;
}

.topbar {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 0 10px;
  border-bottom: 1px solid var(--line);
}

.topbar h1 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0;
  font-stretch: 85%;
}

.topbar .week {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  background: var(--panel);
  border-top: 1px solid var(--line);
  z-index: 10;
}

.nav a {
  flex: 1;
  padding: 11px 2px calc(11px + env(safe-area-inset-bottom));
  text-align: center;
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--muted);
  text-decoration: none;
  border-right: 1px solid var(--line);
}

.nav a:last-child {
  border-right: 0;
}

.nav a[aria-current="page"] {
  color: var(--ink);
  background: var(--ground);
  font-weight: 600;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  margin-top: var(--gap);
}

.panel h2 {
  margin: 0 0 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  font-stretch: 85%;
}

.row {
  display: flex;
  gap: var(--gap);
  flex-wrap: wrap;
}

.row > * {
  flex: 1 1 140px;
}

/* --- primary readout --------------------------------------------------- */

.readout {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.readout .value {
  font-family: var(--font-mono);
  font-size: 44px;
  line-height: 1;
  font-weight: 500;
  color: var(--live);
  font-variant-numeric: tabular-nums;
}

.readout .unit {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.stat {
  border-left: 2px solid var(--line);
  padding-left: 8px;
}

.stat .k {
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.stat .v {
  font-family: var(--font-mono);
  font-size: 19px;
  font-variant-numeric: tabular-nums;
}

/* --- 84-day strip ------------------------------------------------------ */

.strip {
  display: flex;
  align-items: flex-end;
  gap: 1px;
  height: 64px;
  overflow-x: auto;
}

.strip .bar {
  flex: 1 0 3px;
  min-width: 3px;
  background: var(--deep);
  border-radius: 1px 1px 0 0;
}

.strip .bar.empty {
  background: var(--line);
  height: 2px !important;
}

.strip .bar.today {
  background: var(--live);
}

/* --- checklist --------------------------------------------------------- */

.check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
}

.check:last-child {
  border-bottom: 0;
}

.check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin: 1px 0 0;
  accent-color: var(--deep);
  flex: none;
}

.check .time {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  flex: none;
  width: 42px;
}

.check .what {
  flex: 1;
}

.check .hint {
  display: block;
  font-size: 12px;
  color: var(--muted);
}

/* --- controls ---------------------------------------------------------- */

button,
.btn {
  font-family: var(--font-label);
  font-size: 13px;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 7px 12px;
  cursor: pointer;
}

button:hover,
.btn:hover {
  border-color: var(--muted);
}

button.primary {
  background: var(--deep);
  border-color: var(--deep);
  color: var(--panel);
}

button.danger {
  color: var(--live);
}

button:disabled {
  opacity: 0.5;
  cursor: default;
}

input[type="text"],
input[type="number"],
input[type="password"],
input[type="date"],
textarea,
select {
  font-family: var(--font-label);
  font-size: 15px;
  color: var(--ink);
  background: var(--ground);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px 9px;
  width: 100%;
}

input.num,
input[type="number"] {
  font-family: var(--font-mono);
}

textarea {
  min-height: 76px;
  resize: vertical;
}

label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}

/* visible focus is mandatory: every control is reachable by keyboard */
:focus-visible {
  outline: 2px solid var(--live);
  outline-offset: 1px;
}

/* --- cards ------------------------------------------------------------- */

.card-item {
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
}

.card-item:last-child {
  border-bottom: 0;
}

.card-item .ru {
  font-size: 15px;
}

.card-item .en {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--deep);
  margin-top: 2px;
}

.card-item .meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  margin-top: 4px;
}

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 4px;
  color: var(--muted);
}

.tag.auto {
  color: var(--live);
  border-color: var(--live);
}

/* --- review ------------------------------------------------------------ */

.review-stage {
  min-height: 160px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
  text-align: center;
  padding: 18px 8px;
}

.review-stage .ru {
  font-size: 19px;
}

.review-stage .en {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--deep);
}

.grades {
  display: flex;
  gap: 8px;
}

.grades button {
  flex: 1;
}

/* --- chart ------------------------------------------------------------- */

.chart {
  width: 100%;
  height: 180px;
  display: block;
}

/* --- program ----------------------------------------------------------- */

.week-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
}

.week-row.current {
  color: var(--live);
  font-weight: 600;
}

.week-row .n {
  font-family: var(--font-mono);
  width: 28px;
  flex: none;
}

.week-row .target {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  margin-left: auto;
}

.week-row.current .target {
  color: var(--live);
}

/* --- misc -------------------------------------------------------------- */

.empty {
  color: var(--muted);
  font-size: 14px;
  padding: 14px 0;
}

.error {
  color: var(--live);
  font-size: 13px;
  padding: 8px 0;
}

.prose p {
  margin: 0 0 10px;
}

.prose h3 {
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 16px 0 6px;
}

.prose pre {
  font-family: var(--font-mono);
  font-size: 12px;
  white-space: pre-wrap;
  background: var(--ground);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 9px;
}

.login {
  max-width: 320px;
  margin: 18vh auto 0;
}

@media (min-width: 720px) {
  .app {
    padding-bottom: var(--gap);
  }

  .nav {
    position: static;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    margin-top: var(--gap);
  }

  .nav a {
    padding: 9px 2px;
  }
}

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