/* ==========================================================================
   Gridovators learning platform
   Extends style.css. Same palette, same shapes. Logical properties only, so
   the Arabic locale mirrors from the document dir attribute alone.
   ========================================================================== */

.learn-main { min-height: 60vh; }

/* --------------------------------------------------------- first screen -- */
.lang-gate { padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.lang-grid {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  max-width: 720px;
}
.lang-btn {
  display: flex; flex-direction: column; align-items: flex-start; gap: 0.2rem;
  background: var(--white);
  border: 3px solid var(--line);
  border-radius: var(--r-lg);
  padding: 1.1rem 1.3rem;
  box-shadow: var(--shadow-card);
  cursor: pointer;
  font: inherit;
  color: var(--indigo-700);
  text-align: start;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.lang-btn:hover { transform: translateY(-3px); box-shadow: var(--shadow-pop); }
.lang-btn .native {
  font-family: var(--font-display); font-weight: 800;
  font-size: 1.5rem; line-height: 1.35;
}
.lang-btn .latin { font-size: 0.92rem; font-weight: 700; color: var(--text-soft); }
.lang-btn[aria-pressed="true"] { background: var(--amber-100); border-color: var(--amber-500); }

/* ------------------------------------------------------------- bands -- */
.band-card { display: flex; flex-direction: column; gap: 0.6rem; height: 100%; }
.band-card .btn { align-self: flex-start; margin-block-start: auto; }

/* --------------------------------------------------------- unit path -- */
.path-wrap {
  position: relative;
  overflow-x: auto;
  padding-block: 1.2rem 1.6rem;
  scrollbar-width: thin;
}
.path {
  display: flex;
  align-items: stretch;
  gap: 0.7rem;
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: max-content;
}
/* The row is a flex line, so in Arabic it runs right to left from the
   document direction alone. Nothing here hard-codes a side. */

.path-node {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  inline-size: 168px;
  padding: 0.9rem 1rem 1rem;
  border: 3px solid var(--line);
  border-radius: var(--r-md);
  background: var(--white);
  box-shadow: var(--shadow-card);
  text-decoration: none;
  color: var(--indigo-700);
  font: inherit;
  text-align: start;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.path-node:hover { transform: translateY(-3px); box-shadow: var(--shadow-pop); color: var(--indigo-700); }
.path-node .u-num {
  font-family: var(--font-display); font-weight: 800;
  font-size: 0.85rem; letter-spacing: 0.02em; color: var(--text-soft);
}
.path-node .u-title {
  font-family: var(--font-display); font-weight: 800;
  font-size: 1.02rem; line-height: 1.25;
}
.path-node .u-status {
  display: inline-flex; align-items: center; gap: 0.35em;
  font-size: 0.82rem; font-weight: 800;
  margin-block-start: auto;
}
/* Every state carries an icon and a word, never colour on its own. */
.path-node.is-done   { background: var(--teal-100); border-color: rgba(23,167,143,.45); }
.path-node.is-done .u-status { color: #0C7A67; }
.path-node.is-current { background: var(--amber-100); border-color: var(--amber-500); }
.path-node.is-current .u-status { color: #8A5A00; }
.path-node.is-locked { background: var(--indigo-100); border-color: rgba(75,69,168,.3); opacity: 0.85; cursor: not-allowed; }
.path-node.is-locked .u-status { color: var(--text-soft); }
.path-node.is-locked:hover { transform: none; box-shadow: var(--shadow-card); }

.stars { display: inline-flex; gap: 0.15rem; }
.stars svg { width: 1.05rem; height: 1.05rem; }
.star-on  { fill: var(--amber-400); stroke: var(--indigo-700); stroke-width: 1.5; }
.star-off { fill: none; stroke: rgba(46,42,99,.35); stroke-width: 1.5; }

.path-progress {
  block-size: 8px; border-radius: var(--pill);
  background: rgba(46,42,99,.12);
  overflow: hidden;
}
.path-progress span {
  display: block; block-size: 100%;
  background: var(--teal-400);
  border-start-end-radius: var(--pill); border-end-end-radius: var(--pill);
}

/* ------------------------------------------------------ unit overview -- */
.lesson-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.7rem; }
.lesson-row {
  display: flex; align-items: center; gap: 1rem;
  background: var(--white);
  border: 3px solid var(--line);
  border-radius: var(--r-md);
  padding: 0.9rem 1.2rem;
  text-decoration: none; color: var(--indigo-700);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.lesson-row:hover { transform: translateY(-2px); box-shadow: var(--shadow-card); color: var(--indigo-700); }
.lesson-row .l-num {
  inline-size: 38px; block-size: 38px; flex: none;
  display: grid; place-items: center; border-radius: 50%;
  background: var(--indigo-100); color: var(--indigo-500);
  font-family: var(--font-display); font-weight: 800;
}
.lesson-row.is-done .l-num { background: var(--teal-400); color: var(--indigo-900); }
.lesson-row .l-text { display: grid; gap: 0.1rem; }
.lesson-row .l-title { font-family: var(--font-display); font-weight: 800; font-size: 1.05rem; }
.lesson-row .l-idea { font-size: 0.92rem; color: var(--text-soft); font-weight: 600; }
.lesson-row .l-mark { margin-inline-start: auto; flex: none; color: var(--teal-500); }

/* ------------------------------------------------------------ lesson -- */
.lesson { max-width: 72ch; }
.lesson h1 { margin-block-end: 0.3em; }
.lesson-idea {
  border-inline-start: 8px solid var(--amber-400);
  background: var(--amber-100);
  border-radius: var(--r-md);
  padding: 1rem 1.3rem;
  font-weight: 700;
  color: var(--indigo-700);
  margin-block-end: 2rem;
}
.lesson-idea .k {
  display: block; font-size: 0.8rem; letter-spacing: 0.04em;
  color: #8A5A00; margin-block-end: 0.2rem;
}
.lesson-block { margin-block-end: 2.2rem; }
.lesson-block p { font-size: 1.05rem; }

.lesson-summary {
  background: var(--teal-100);
  border: 3px solid rgba(23,167,143,.3);
  border-radius: var(--r-lg);
  padding: 1.4rem 1.6rem;
}
.lesson-summary h2 { font-size: 1.25rem; margin-block-end: 0.5em; }
.lesson-summary ul { margin-block-end: 0; }

.lesson-nav {
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: center;
  margin-block-start: 2.5rem;
  padding-block-start: 1.6rem;
  border-block-start: 3px solid var(--line);
}
.lesson-nav .spacer { margin-inline-start: auto; }

.lesson-crumbs {
  display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center;
  font-size: 0.9rem; font-weight: 700; color: var(--text-soft);
  margin-block-end: 1rem;
}
.lesson-crumbs a { color: var(--indigo-500); text-decoration: none; }
.lesson-crumbs a:hover { text-decoration: underline; }

/* ----------------------------------------------------------- question -- */
.qa {
  background: var(--white);
  border: 3px solid var(--line);
  border-radius: var(--r-lg);
  padding: 1.5rem 1.6rem;
}
.qa h2 { font-size: 1.2rem; }
.qa-options { display: grid; gap: 0.7rem; margin-block: 1rem; }
.qa-option {
  display: flex; align-items: flex-start; gap: 0.8rem;
  inline-size: 100%;
  background: var(--paper);
  border: 3px solid var(--line);
  border-radius: var(--r-md);
  padding: 0.85rem 1.1rem;
  font: inherit; font-weight: 700;
  color: var(--indigo-700);
  text-align: start;
  cursor: pointer;
}
.qa-option:hover { border-color: var(--indigo-500); }
.qa-option .mark { flex: none; inline-size: 1.5rem; block-size: 1.5rem; }
.qa-option[aria-pressed="true"] { background: var(--indigo-100); border-color: var(--indigo-500); }
.qa-option.is-correct { background: var(--teal-100); border-color: var(--teal-500); }
.qa-option.is-wrong   { background: var(--coral-100); border-color: var(--coral-500); }
.qa-option:disabled { cursor: default; }

.qa-feedback {
  border-radius: var(--r-md);
  padding: 1rem 1.2rem;
  font-weight: 700;
  display: flex; gap: 0.8rem; align-items: flex-start;
}
.qa-feedback.good { background: var(--teal-100); color: #0A6656; }
.qa-feedback.bad  { background: var(--coral-100); color: #A4321F; }
.qa-feedback .head { display: block; font-family: var(--font-display); font-size: 1.05rem; }

/* ------------------------------------------------------------- diagram -- */
.diagram {
  background: var(--white);
  border: 3px solid var(--line);
  border-radius: var(--r-lg);
  padding: 1.3rem 1.4rem;
  box-shadow: var(--shadow-card);
}
.diagram figcaption {
  margin-block-start: 0.9rem;
  font-size: 0.95rem; font-weight: 700; color: var(--text-soft);
}
.diagram svg { display: block; inline-size: 100%; block-size: auto; }
.diagram .d-label { font-family: var(--font-body); font-size: 13px; font-weight: 700; fill: var(--text-soft); }
.diagram .d-title { font-family: var(--font-display); font-size: 15px; font-weight: 800; fill: var(--indigo-700); }
.diagram .d-value { font-family: var(--font-display); font-size: 14px; font-weight: 800; fill: var(--indigo-700); }

/* Drawn once on first scroll into view, never again on re-entry. */
.d-draw { stroke-dasharray: var(--len, 1000); stroke-dashoffset: var(--len, 1000); }
.is-drawn .d-draw { transition: stroke-dashoffset 900ms ease-out; stroke-dashoffset: 0; }
.d-grow { transform: scaleY(0); transform-origin: bottom; transform-box: fill-box; }
.is-drawn .d-grow { transition: transform 700ms cubic-bezier(.2,.8,.3,1); transform: scaleY(1); }
.d-fade { opacity: 0; }
.is-drawn .d-fade { transition: opacity 500ms ease-out 300ms; opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  .d-draw { stroke-dashoffset: 0; }
  .d-grow { transform: scaleY(1); }
  .d-fade { opacity: 1; }
}

/* ---------------------------------------------------------- simulator -- */
.sim {
  background: var(--indigo-700);
  border: 4px solid var(--indigo-900);
  border-radius: var(--r-xl);
  padding: clamp(1.1rem, 3vw, 1.8rem);
  color: #E7E4FA;
  box-shadow: var(--shadow-pop);
}
.sim h2, .sim h3 { color: var(--white); }
.sim-stage {
  background: #191446;
  border-radius: var(--r-lg);
  border: 3px solid rgba(255,255,255,.12);
  padding: 0.5rem;
}
.sim-stage canvas { display: block; inline-size: 100%; block-size: auto; }

.sim-controls {
  display: grid; gap: 0.9rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin-block-start: 1.1rem;
}
.sim-ctl {
  background: rgba(255,255,255,.08);
  border: 3px solid rgba(255,255,255,.14);
  border-radius: var(--r-md);
  padding: 0.85rem 1rem;
}
.sim-ctl label {
  display: flex; align-items: center; justify-content: space-between; gap: 0.5rem;
  font-weight: 800; font-size: 0.95rem; color: #fff; margin-block-end: 0.5rem;
}
.sim-ctl .val { font-family: var(--font-display); color: var(--amber-400); }

.sim input[type="range"] {
  inline-size: 100%; -webkit-appearance: none; appearance: none;
  background: transparent; cursor: pointer; padding: 0;
}
.sim input[type="range"]::-webkit-slider-runnable-track { block-size: 12px; border-radius: var(--pill); background: rgba(255,255,255,.22); }
.sim input[type="range"]::-moz-range-track { block-size: 12px; border-radius: var(--pill); background: rgba(255,255,255,.22); }
.sim input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  inline-size: 26px; block-size: 26px; margin-block-start: -7px;
  border-radius: 50%; background: var(--amber-400); border: 3px solid var(--indigo-900);
}
.sim input[type="range"]::-moz-range-thumb {
  inline-size: 26px; block-size: 26px;
  border-radius: 50%; background: var(--amber-400); border: 3px solid var(--indigo-900);
}

.sim-readout { display: flex; flex-wrap: wrap; gap: 0.7rem; align-items: center; margin-block-start: 1.1rem; }
.readout-pill {
  display: inline-flex; align-items: center; gap: 0.5em;
  background: rgba(255,255,255,.1);
  border: 3px solid rgba(255,255,255,.16);
  border-radius: var(--pill);
  padding: 0.4em 1em; font-weight: 800; font-size: 0.92rem;
}
.readout-pill .k { color: #B9B3EA; }
.readout-pill .v { font-family: var(--font-display); color: var(--white); }

.verdict {
  display: inline-flex; align-items: center; gap: 0.55em;
  border-radius: var(--pill); padding: 0.45em 1.1em;
  font-family: var(--font-display); font-weight: 800; font-size: 1.02rem;
  border: 3px solid var(--indigo-900);
}
.verdict.good { background: var(--teal-400); color: var(--indigo-900); }
.verdict.warn { background: var(--amber-400); color: var(--indigo-900); }
.verdict.bad  { background: var(--coral-400); color: #fff; }

.sim-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-block-start: 1.1rem; }

.sim-narrow {
  background: var(--amber-100);
  border: 3px solid rgba(247,168,27,.4);
  border-radius: var(--r-lg);
  padding: 1.2rem 1.4rem;
  color: var(--indigo-700);
  font-weight: 700;
}

.sim-result {
  margin-block-start: 1.1rem;
  background: rgba(255,255,255,.08);
  border: 3px solid rgba(255,255,255,.14);
  border-radius: var(--r-md);
  padding: 1rem 1.2rem;
}
.sim-result ul { margin: 0.6rem 0 0; padding-inline-start: 1.2em; }

/* ------------------------------------------------------------- games -- */
.game-band { font-size: 0.8rem; }

/* ---------------------------------------------------------- celebrate -- */
.confetti-layer {
  position: fixed; inset: 0; pointer-events: none; z-index: 300; overflow: hidden;
}
.confetti-bit {
  position: absolute; inline-size: 10px; block-size: 14px; border-radius: 2px;
  animation: gvConfetti 1s ease-out forwards;
}
@keyframes gvConfetti {
  from { transform: translate3d(0,0,0) rotate(0deg); opacity: 1; }
  to   { transform: translate3d(var(--dx), var(--dy), 0) rotate(var(--rot)); opacity: 0; }
}
.celebrate {
  background: var(--teal-100);
  border: 3px solid var(--teal-500);
  border-radius: var(--r-lg);
  padding: 1.4rem 1.6rem;
  text-align: center;
}
@media (prefers-reduced-motion: reduce) {
  .confetti-layer { display: none; }
}

/* ------------------------------------------------------------ notices -- */
.notice {
  border-radius: var(--r-md);
  padding: 0.9rem 1.2rem;
  font-weight: 700;
  border: 3px solid var(--line);
  background: var(--white);
}
.notice.warn { background: var(--amber-100); border-color: rgba(247,168,27,.45); }
.notice.error { background: var(--coral-100); border-color: rgba(240,101,79,.45); }

.skeleton {
  background: linear-gradient(90deg, rgba(46,42,99,.06), rgba(46,42,99,.12), rgba(46,42,99,.06));
  background-size: 200% 100%;
  border-radius: var(--r-md);
  animation: gvSkeleton 1.2s linear infinite;
}
@keyframes gvSkeleton { to { background-position: -200% 0; } }
.skeleton-line { block-size: 1.1rem; margin-block-end: 0.7rem; }

/* ------------------------------------------------------------- daily -- */
.dist-bar {
  block-size: 16px; border-radius: var(--pill);
  background: rgba(46,42,99,.12); overflow: hidden; position: relative;
}
.dist-bar span { display: block; block-size: 100%; background: var(--teal-400); }
.dist-marker {
  position: absolute; inset-block: -6px; inline-size: 4px;
  background: var(--indigo-700); border-radius: 2px;
}

/* ------------------------------------------------------------ legends -- */
.chart-legend { display: flex; flex-wrap: wrap; gap: 1rem; margin-block-start: 0.8rem; font-weight: 800; }
.chart-legend span { display: inline-flex; align-items: center; gap: 0.45em; }
.swatch { inline-size: 18px; block-size: 8px; border-radius: var(--pill); display: inline-block; }

/* ---------------------------------------------------------- accounts -- */
.auth-card {
  max-width: 34rem; margin: clamp(1.5rem, 4vw, 3rem) auto; background: var(--white);
  border: 3px solid var(--line); border-radius: var(--r-xl); box-shadow: var(--shadow-pop);
  padding: clamp(1.6rem, 4vw, 2.6rem);
}
.auth-head { display: flex; align-items: center; gap: .8rem; }
.auth-head h1 { margin: 0; font-size: clamp(1.7rem, 4vw, 2.3rem); }
.auth-lock { width: 2.4rem; height: 2.4rem; padding: .45rem; border-radius: 14px; background: var(--amber-100); color: #A96C00; flex: none; }
.auth-card > .lede { margin-block: .9rem .4rem; }
.auth-next { font-weight: 800; color: var(--teal-500); margin-block-end: 1.2rem; }
.auth-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: .4rem; background: var(--indigo-100); border-radius: var(--pill); padding: .3rem; margin-block-end: 1.2rem; }
.auth-tab { font: inherit; font-weight: 800; border: 0; border-radius: var(--pill); padding: .6em 1em; background: transparent; color: var(--indigo-700); cursor: pointer; }
.auth-tab.is-on { background: var(--white); box-shadow: 0 2px 0 rgba(46,42,99,.15); }
.auth-form { display: grid; gap: .85rem; }
.auth-field { display: grid; gap: .3rem; font-weight: 800; font-size: .95rem; color: var(--indigo-700); }
.auth-field[hidden] { display: none; }
.auth-field input {
  font: inherit; font-weight: 600; padding: .7em .9em; border: 2.5px solid var(--line); border-radius: var(--r-sm);
  background: var(--paper); color: var(--text);
}
.auth-field input:focus { outline: none; border-color: var(--indigo-500); background: var(--white); }
.auth-submit, .auth-link { width: 100%; justify-content: center; }
.auth-or { text-align: center; margin: 0; font-weight: 800; color: var(--text-soft); }
.auth-status { margin: 0; min-height: 1.5em; font-weight: 700; color: var(--text-soft); text-align: center; }
.auth-status.is-good { color: var(--teal-500); }
.auth-status.is-bad { color: var(--coral-500); }
.auth-back { display: inline-block; margin-block-start: 1.2rem; font-weight: 800; }
.auth-bar { background: var(--indigo-700); color: #EDEBFB; font-weight: 700; font-size: .92rem; }
.auth-bar-inner { display: flex; align-items: center; justify-content: flex-end; gap: 1rem; padding-block: .45rem; }
.auth-signout { font: inherit; font-weight: 800; background: none; border: 2px solid rgba(255,255,255,.5); color: #fff; border-radius: var(--pill); padding: .2em .9em; cursor: pointer; }
.auth-signout:hover { background: rgba(255,255,255,.12); }
.game-soon { background: var(--paper-2); border-style: dashed; justify-content: center; }
.game-soon .chip { align-self: flex-start; }
/* hidden parts of the sign-in card must stay hidden, whatever their display style */
.auth-card [hidden] { display: none !important; }