/* Simple, mobile-first layout. */
:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1d2433;
  --accent: #3b5bdb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app-header {
  padding: 12px 16px;
  background: var(--accent);
  color: #fff;
}
.app-header h1 { margin: 0; font-size: 1.25rem; }

.app-main {
  display: grid;
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
  padding: 16px;
}

/* Side by side on wider screens (laptop) */
@media (min-width: 700px) {
  .app-main { grid-template-columns: 1fr 1fr; align-items: start; }
}

.avatar-panel, .controls {
  background: var(--card);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

#avatar { width: 100%; }
.avatar { display: block; width: 100%; color: var(--accent); }
.caption { text-align: center; min-height: 3em; }

textarea {
  width: 100%;
  font: inherit;
  padding: 8px;
  border: 1px solid #c5cad8;
  border-radius: 8px;
}

.buttons { display: flex; gap: 12px; margin-top: 12px; }

/* Large touch-friendly buttons for phones */
button.big {
  flex: 1;
  min-height: 52px;
  font-size: 1.1rem;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}
button.big:focus-visible { outline: 3px solid #ffb703; outline-offset: 2px; }

/* ---------- Avatar states ---------- */
/* Each part is scaled around its own centre */
.avatar .av-eye, .avatar .av-mouth, .avatar .av-head, .avatar .av-ring, .avatar .av-brows {
  transform-box: fill-box;
  transform-origin: center;
}

/* Default (idle): smile visible, open mouth and ring hidden */
.av-mouth { opacity: 0; }
.av-ring { opacity: 0; }

/* Idle: gentle breathing and blinking */
.avatar--idle .av-head { animation: av-breathe 4s ease-in-out infinite; }
.avatar--idle .av-eye, .avatar--listening .av-eye { animation: av-blink 5s infinite; }

/* Talking: open mouth that opens and closes like speech */
.avatar--talking .av-smile { opacity: 0; }
.avatar--talking .av-mouth { opacity: 1; animation: av-talk 0.45s ease-in-out infinite; }
.avatar--talking .av-eye { animation: av-blink 5s infinite; }

/* Listening: raised brows, head tilt, pulsing ring */
.avatar--listening .av-brows { transform: translateY(-5px); }
.avatar--listening .av-head { transform: rotate(-4deg); }
.avatar--listening .av-ring { opacity: 1; animation: av-pulse 1.6s ease-out infinite; }

@keyframes av-breathe { 50% { transform: scale(1.015); } }
@keyframes av-blink { 0%, 94%, 100% { transform: scaleY(1); } 97% { transform: scaleY(0.1); } }
@keyframes av-talk { 0%, 100% { transform: scaleY(0.3); } 50% { transform: scaleY(1); } }
@keyframes av-pulse { 0% { transform: scale(0.96); opacity: 0.9; } 100% { transform: scale(1.04); opacity: 0.2; } }

/* Reduced motion: no animation at all. The states still look different
   (open mouth, raised brows + tilt + ring), just without movement. */
@media (prefers-reduced-motion: reduce) {
  .avatar *, .avatar { animation: none !important; transition: none !important; }
  .avatar--talking .av-mouth { transform: scaleY(0.7); }
  .avatar--listening .av-ring { opacity: 0.8; }
}

/* ---------- Test control ---------- */
.state-test { display: flex; gap: 8px; justify-content: center; margin-top: 12px; }
.state-test button {
  padding: 8px 12px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: #fff;
  color: var(--accent);
  font: inherit;
  cursor: pointer;
}
.state-test button[aria-pressed="true"] { background: var(--accent); color: #fff; }
.state-test button:focus-visible { outline: 3px solid #ffb703; outline-offset: 2px; }

.status { min-height: 1.5em; margin: 8px 0 0; font-size: 0.95rem; color: #555; }

.lang-row { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.lang-row label { display: flex; flex-direction: column; gap: 4px; font-size: 0.9rem; flex: 1; min-width: 140px; }
.lang-row select { font: inherit; padding: 6px; border: 1px solid #c5cad8; border-radius: 8px; background: #fff; }

/* ---------- Screens and tabs ---------- */
[hidden] { display: none !important; }
.app-header { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.tabs { display: flex; gap: 8px; }
.tabs button {
  padding: 8px 14px; border: 1px solid #fff; border-radius: 8px;
  background: transparent; color: #fff; font: inherit; cursor: pointer;
}
.tabs button[aria-pressed="true"] { background: #fff; color: var(--accent); }
.tabs button:focus-visible { outline: 3px solid #ffb703; outline-offset: 2px; }

/* One column for the questions screen */
.app-main.single { grid-template-columns: 1fr; }
.card { background: var(--card); border-radius: 12px; padding: 16px; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1); }
.card h2 { margin: 0 0 8px; font-size: 1.1rem; }
.hint { color: #555; font-size: 0.9rem; margin: 0 0 12px; }
#file-input { display: block; margin-bottom: 12px; max-width: 100%; }
#paste-box { margin-bottom: 12px; }

/* ---------- Review cards ---------- */
.pair-card, .unplaced-card { border: 1px solid #d5d9e6; border-radius: 10px; padding: 12px; margin-bottom: 12px; }
.pair-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 8px; }
.field { display: flex; flex-direction: column; gap: 4px; font-size: 0.9rem; margin-bottom: 8px; }
.field input, .field select { font: inherit; padding: 8px; border: 1px solid #c5cad8; border-radius: 8px; background: #fff; }
.pair-meta { display: grid; grid-template-columns: 2fr 1fr; gap: 12px; }
.unplaced-card pre { white-space: pre-wrap; margin: 0 0 8px; font: inherit; }
button.small {
  padding: 6px 12px; border: 1px solid var(--accent); border-radius: 8px;
  background: #fff; color: var(--accent); font: inherit; cursor: pointer;
}
button.small.danger { border-color: #c92a2a; color: #c92a2a; }
button.big.secondary { background: #fff; color: var(--accent); border: 1px solid var(--accent); }
button.small:focus-visible, button.big:focus-visible { outline: 3px solid #ffb703; outline-offset: 2px; }

/* ---------- Practice screen ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 12px; }
@media (max-width: 520px) { .form-grid { grid-template-columns: 1fr; } }
.check { display: flex; gap: 8px; align-items: flex-start; margin: 8px 0; }
.check input { margin-top: 4px; width: 18px; height: 18px; }
.interview-layout { display: grid; gap: 16px; }
@media (min-width: 700px) { .interview-layout { grid-template-columns: 1fr 1fr; align-items: start; } }
.caption .say { margin: 0 0 6px; font-style: italic; color: #555; }
.caption .question { margin: 0; font-size: 1.15rem; font-weight: 600; }
.progress-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; font-weight: 600; }
#timer { font-variant-numeric: tabular-nums; }
#timer.low { color: #c92a2a; }
#answer-area .buttons + .buttons { flex-wrap: wrap; margin-top: 8px; }
#reveal pre { white-space: pre-wrap; font: inherit; background: #f0f3ff; border-radius: 8px; padding: 12px; margin: 0 0 12px; }
#reveal h2, #finished h2 { margin: 0 0 8px; font-size: 1.1rem; }
#finished-list { padding-left: 1.2em; }
#finished-list li { margin-bottom: 6px; }
button:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---------- Mode picker and Settings ---------- */
.mode-picker { border: 1px solid #d5d9e6; border-radius: 10px; padding: 8px 12px 12px; margin: 0 0 8px; display: grid; gap: 8px; }
.mode-picker legend { padding: 0 6px; font-size: 0.9rem; }
.mode-opt { display: flex; gap: 10px; align-items: flex-start; padding: 8px; border-radius: 8px; cursor: pointer; }
.mode-opt:has(input:checked) { background: #f0f3ff; }
.mode-opt:has(input:disabled) { opacity: 0.55; cursor: not-allowed; }
.mode-opt input { margin-top: 4px; width: 18px; height: 18px; }
.mode-opt span { font-size: 0.95rem; }
.card h2.spaced { margin-top: 20px; }
#screen-settings .buttons { margin: 8px 0; }

/* ---------- Coach feedback ---------- */
#feedback h2 { margin: 0 0 8px; font-size: 1.1rem; }
#feedback h3 { margin: 12px 0 4px; font-size: 0.95rem; }
#feedback ul { margin: 0; padding-left: 1.2em; }
#feedback .score { font-size: 1.6rem; font-weight: 700; margin: 0 0 4px; }
#fb-buttons { margin: 12px 0 8px; }
#fb-error-text { color: #c92a2a; }

/* ---------- Sets ---------- */
#set-choices { display: grid; gap: 4px; }
#set-choices .check { margin: 0; }
.set-buttons, .card .buttons { flex-wrap: wrap; }
.hint.spaced-top { margin-top: 16px; }
#import-input { display: block; margin: 8px 0 12px; max-width: 100%; }
.pair-move { margin-top: 4px; }

/* ---------- Realistic interviewer (video clips) and self-view ---------- */
.stage { position: relative; width: 100%; max-width: 240px; margin: 0 auto; }
.stage:has(.has-video) { max-width: 520px; }
.video-face { position: relative; isolation: isolate; width: 100%; aspect-ratio: 4 / 3; overflow: hidden; border-radius: 12px; background: #1d2433; }
.clip { position: absolute; inset: 0; opacity: 0; transition: opacity 0.6s ease; }
.clip.on { opacity: 1; }
.clip-video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity 0.6s ease; }
.clip-video.on { opacity: 1; }
.self-view {
  position: absolute; right: 8px; bottom: 8px; z-index: 10;
  width: max(28%, 90px); aspect-ratio: 4 / 3; object-fit: cover;
  transform: scaleX(-1); /* mirror, like a normal video call */
  border: 2px solid #fff; border-radius: 8px; background: #000;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.4);
}
#selfview-btn[aria-pressed="true"] { background: var(--accent); color: #fff; }
@media (prefers-reduced-motion: reduce) { .clip, .clip-video { transition: none; } }

/* ---------- Photo face ---------- */
.photo-face { position: relative; isolation: isolate; /* keeps the photo layers' z-index inside this box */ width: 100%; aspect-ratio: 5 / 4; overflow: hidden; border-radius: 12px; background: #1d2433; }
.photo-frame {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; object-position: 50% 35%; /* keeps the eyes in the upper third */
  opacity: 0;
}

/* ---------- Session summary and History ---------- */
.sum h2 { margin: 0 0 4px; font-size: 1.1rem; }
.sum h3 { margin: 16px 0 6px; font-size: 0.95rem; }
.sum .sum-when { color: #555; font-size: 0.9rem; margin: 0 0 8px; }
.sum .sum-result { font-size: 1.4rem; font-weight: 700; margin: 8px 0; }
.sum ul, .sum ol.sum-questions { margin: 0; padding-left: 1.2em; }
.sum ol.sum-questions { padding-left: 0; list-style: none; }
.sum-questions details { border: 1px solid #d5d9e6; border-radius: 8px; padding: 8px 10px; margin-bottom: 8px; }
.sum-questions summary { cursor: pointer; }
.sum-questions summary:focus-visible { outline: 3px solid #ffb703; outline-offset: 2px; }
.sum-questions .sum-note { color: #555; }
.sum-questions summary .sum-note { white-space: nowrap; }
.sum-body { margin-top: 8px; font-size: 0.95rem; }
.sum-body p { margin: 4px 0; }
.sum-body .sum-answer { white-space: pre-wrap; background: #f0f3ff; border-radius: 6px; padding: 8px; }
.sum-weak li { margin-bottom: 6px; }
.history-row {
  display: block; width: 100%; text-align: left; margin-bottom: 8px; padding: 10px 12px;
  border: 1px solid #d5d9e6; border-radius: 10px; background: #fff; font: inherit; cursor: pointer;
}
.history-row:hover { background: #f0f3ff; }
.history-row:focus-visible { outline: 3px solid #ffb703; outline-offset: 2px; }
.history-row .row-title { font-weight: 600; }
.history-row .row-detail { color: #555; font-size: 0.9rem; }

/* ---------- Microphone check ---------- */
.meter { height: 14px; background: #e3e7f3; border-radius: 7px; overflow: hidden; margin: 12px 0 4px; }
.meter-fill { height: 100%; width: 0; background: var(--accent); }
@media (prefers-reduced-motion: no-preference) { .meter-fill { transition: width 0.08s linear; } }
#mic-check-advice { margin: 4px 0 12px; padding-left: 1.2em; }
#mic-check-advice li { margin-bottom: 6px; }

/* ---------- Phones ---------- */
@media (max-width: 600px) {
  .app-header { padding: 10px 12px; }
  .app-header h1 { font-size: 1.1rem; }
  .tabs { width: 100%; }
  .tabs button { flex: 1; padding: 8px 4px; font-size: 0.9rem; }
  .app-main { padding: 12px; gap: 12px; }
  .card, .avatar-panel, .controls { padding: 12px; }
  /* bigger tap targets */
  .tabs button, button.small, .history-row, select, input[type="text"], input[type="number"] { min-height: 44px; }
  .check input { width: 22px; height: 22px; }
  .caption .question { font-size: 1.05rem; }
}

/* Progress view (History tab) */
.prog-chart { width: 100%; height: auto; display: block; margin: 4px 0 8px; }
.prog-key { margin-right: 12px; white-space: nowrap; }
.prog-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 4px; }
.heat { display: grid; gap: 6px; margin-top: 6px; }
.heat-row { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr); gap: 8px; align-items: center; }
.heat-topic { overflow-wrap: anywhere; font-weight: 600; }
.heat-cell { border-radius: 6px; padding: 4px 8px; text-align: center; color: #1d2433; font-weight: 600; }
.heat-count { color: #555; font-size: 0.9rem; }

/* Model answer panel (Interview screen): full width under the question and answer cards */
.model-answer { grid-column: 1 / -1; background: var(--card); border-radius: 12px; padding: 16px; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1); }
.model-answer h2 { margin: 0 0 8px; font-size: 1.1rem; }
.model-answer-text { white-space: pre-wrap; line-height: 1.6; font-size: 1rem; max-height: 40vh; overflow-y: auto; background: #f0f3ff; border-radius: 8px; padding: 12px; }
.model-answer-text:focus-visible { outline: 3px solid #ffb703; outline-offset: 2px; }
@media (max-width: 520px) { .model-answer { padding: 12px; } }