/* Italian Audio Teacher — стилі */

:root {
  --bg: #f6f8fa;
  --surface: #ffffff;
  --surface-2: #eef1f5;
  --text: #1b2430;
  --text-muted: #5b6675;
  --border: #dfe4ea;
  --accent: #1f6feb;
  --accent-press: #1757bd;
  --accent-soft: #e7f0ff;
  --success: #1a7f4b;
  --success-soft: #e4f5ec;
  --warning: #a86500;
  --warning-soft: #fdf2df;
  --danger: #c62828;
  --radius: 16px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 8px 24px rgba(16, 24, 40, .06);
  --tap: 52px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --surface: #161b22;
    --surface-2: #1c2230;
    --text: #e6edf3;
    --text-muted: #9aa7b4;
    --border: #2b3240;
    --accent: #4f8cf7;
    --accent-press: #6ba0ff;
    --accent-soft: #16233b;
    --success: #4ec98a;
    --success-soft: #12281e;
    --warning: #f0b429;
    --warning-soft: #2a2113;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  overscroll-behavior-y: none;
}

body.is-locked { overflow: hidden; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

/* ---------- шапка ---------- */

.app-header {
  padding: calc(env(safe-area-inset-top) + 16px) 16px 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 5;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand__icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  flex: 0 0 auto;
}

.brand__title {
  margin: 0;
  font-size: 1.25rem;
  line-height: 1.25;
  letter-spacing: -.01em;
}

.brand__tagline {
  margin: 2px 0 0;
  color: var(--text-muted);
  font-size: .95rem;
}

.net-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--surface-2);
  font-size: .875rem;
  color: var(--text-muted);
}

.net-status__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
  flex: 0 0 auto;
}

.net-status__dot.is-online { background: var(--success); }
.net-status__dot.is-offline { background: var(--warning); }

/* ---------- основний блок ---------- */

.app-main {
  max-width: 640px;
  margin: 0 auto;
  padding: 16px 16px calc(env(safe-area-inset-bottom) + 24px);
  display: grid;
  gap: 16px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
}

.card__title {
  margin: 0 0 12px;
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
}

/* факти */
.facts {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}

.fact {
  background: var(--surface-2);
  border-radius: 12px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.fact__label { font-size: .8rem; color: var(--text-muted); }
.fact__value { font-size: 1.15rem; font-weight: 600; }

/* прогрес */
.progress__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: .95rem;
  margin-bottom: 8px;
}

.progress__value { font-weight: 700; color: var(--accent); }

.progress__track {
  height: 12px;
  border-radius: 999px;
  background: var(--surface-2);
  overflow: hidden;
  border: 1px solid var(--border);
}

.progress__bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #5aa9ff);
  border-radius: 999px;
  transition: width .35s ease;
  min-width: 0;
}

.progress__hint {
  margin: 8px 0 0;
  font-size: .875rem;
  color: var(--text-muted);
}

/* ---------- кнопки ---------- */

.btn {
  -webkit-appearance: none;
  appearance: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-height: var(--tap);
  padding: 14px 18px;
  border-radius: 14px;
  border: 1px solid transparent;
  font-size: 1.05rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background-color .15s ease, transform .05s ease;
  text-align: center;
}

.btn:active { transform: translateY(1px); }

.btn:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
}

.btn--primary:hover { background: var(--accent-press); }

.btn--secondary {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--accent);
  margin-top: 10px;
}

.btn--icon {
  width: 44px;
  min-height: 44px;
  padding: 0;
  background: var(--surface-2);
  color: var(--text);
  border-radius: 12px;
  font-size: 1.1rem;
}

.current-lesson {
  margin: 14px 0 0;
  font-size: .95rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.current-lesson strong { color: var(--text); }

/* ---------- бейджі ---------- */

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 600;
  white-space: nowrap;
}

.badge--pending { background: var(--warning-soft); color: var(--warning); }
.badge--ready { background: var(--success-soft); color: var(--success); }
.badge--done { background: var(--success-soft); color: var(--success); }

/* ---------- списки ---------- */

.empty-state {
  margin: 4px 0;
  padding: 14px;
  border-radius: 12px;
  background: var(--surface-2);
  color: var(--text-muted);
  font-size: .95rem;
}

.lesson-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  max-height: 55vh;
  overflow-y: auto;
}

.lesson-list__item {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  overflow: hidden;
}

.lesson-list__item.is-current { border-color: var(--accent); }

.lesson-list__btn {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  min-height: var(--tap);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: transparent;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  flex: 1;
}

.lesson-list__dl-btn {
  -webkit-appearance: none;
  appearance: none;
  width: 44px;
  height: 44px;
  min-height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background-color .15s ease;
}

.lesson-list__dl-btn:hover {
  background: var(--accent-soft);
}

.lesson-list__dl-btn.is-downloaded {
  background: var(--success-soft);
  color: var(--success);
  border-color: var(--success);
}

.lesson-list__dl-btn.is-downloading {
  background: var(--warning-soft);
  color: var(--warning);
  border-color: var(--warning);
}

.lesson-list__dl-btn.is-error {
  background: #fde8e8;
  color: var(--danger);
  border-color: var(--danger);
}

@media (prefers-color-scheme: dark) {
  .lesson-list__dl-btn.is-error {
    background: #3d1a1a;
  }
}

.lesson-list__item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lesson-list__btn:hover { background: var(--surface-2); }

.lesson-list__num {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
}

.lesson-list__main {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1 1 auto;
  min-width: 0;
}

.lesson-list__desc {
  font-size: .875rem;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lesson-list--compact .lesson-list__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
}

/* ---------- пошук ---------- */

.search input {
  width: 100%;
  min-height: var(--tap);
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  margin-bottom: 12px;
}

.search input:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 1px;
}

/* ---------- шторки ---------- */

.sheet { position: fixed; inset: 0; z-index: 50; }

.sheet__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, .45);
}

.sheet__panel {
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: min(640px, 100%);
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border-radius: 20px 20px 0 0;
  box-shadow: var(--shadow);
  padding-bottom: env(safe-area-inset-bottom);
}

.sheet__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.sheet__head h2 { margin: 0; font-size: 1.15rem; }

.sheet__body {
  padding: 16px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.detail__day { margin: 0 0 8px; color: var(--text-muted); font-size: .95rem; }
.detail__desc { margin: 0 0 12px; font-size: 1.05rem; }
.detail__status {
  margin: 0 0 16px;
  padding: 12px;
  border-radius: 12px;
  font-size: .95rem;
}
.detail__status.is-pending { background: var(--warning-soft); color: var(--warning); }
.detail__status.is-ready { background: var(--success-soft); color: var(--success); }
.detail__note { margin: 12px 0 0; font-size: .875rem; color: var(--text-muted); }

/* ---------- авторизація ---------- */

.auth-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
}

.auth-bar__guest {
  display: flex;
  gap: 8px;
  flex: 1;
}

.auth-bar__user {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
}

.auth-bar__email {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: .95rem;
  color: var(--text-muted);
}

.btn--small {
  min-height: 44px;
  padding: 10px 16px;
  font-size: .95rem;
  flex: 1;
}

.auth-bar__user .btn--small {
  flex: 0 0 auto;
}

/* форми */
.form-field {
  margin-bottom: 14px;
}

.form-field label {
  display: block;
  margin-bottom: 6px;
  font-size: .9rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-field input {
  width: 100%;
  min-height: var(--tap);
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
}

.form-field input:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 1px;
}

.form-error {
  margin: 0 0 12px;
  padding: 12px;
  border-radius: 12px;
  background: #fde8e8;
  color: var(--danger);
  font-size: .9rem;
}

@media (prefers-color-scheme: dark) {
  .form-error {
    background: #3d1a1a;
  }
}

/* ---------- плеєр ---------- */

.player__body {
  padding: 20px 16px;
}

.player__status {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 40px 0;
  color: var(--text-muted);
}

.player__spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.player__content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.player__exercise-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .875rem;
  color: var(--text-muted);
}

.player__exercise-type {
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

.player__phrase {
  text-align: center;
  padding: 24px 16px;
  background: var(--surface-2);
  border-radius: 16px;
}

.player__italian {
  margin: 0 0 8px;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text);
}

.player__ukrainian {
  margin: 0;
  font-size: 1.1rem;
  color: var(--text-muted);
}

.player__controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
}

.btn--large {
  width: 64px;
  height: 64px;
  min-height: 64px;
  border-radius: 50%;
  font-size: 1.5rem;
  padding: 0;
}

.btn--large.btn--primary {
  width: 72px;
  height: 72px;
  min-height: 72px;
  font-size: 1.75rem;
}

.player__progress {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.player__time {
  display: flex;
  justify-content: space-between;
  font-size: .875rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.player__seek {
  width: 100%;
  height: 40px;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
}

.player__seek::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 3px;
  background: var(--border);
}

.player__seek::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: -9px;
  box-shadow: 0 2px 6px rgba(0,0,0,.2);
}

.player__seek::-moz-range-track {
  height: 6px;
  border-radius: 3px;
  background: var(--border);
}

.player__seek::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  box-shadow: 0 2px 6px rgba(0,0,0,.2);
}

.player__phase {
  text-align: center;
  padding: 12px;
  border-radius: 12px;
  background: var(--surface-2);
  font-size: .9rem;
  color: var(--text-muted);
}

.player__phase.is-playing {
  background: var(--success-soft);
  color: var(--success);
}

.player__phase.is-paused {
  background: var(--warning-soft);
  color: var(--warning);
}

.player__no-audio,
.player__error {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 40px 0;
  text-align: center;
}

.player__no-audio-icon,
.player__error-icon {
  font-size: 3rem;
  margin: 0;
}

.player__no-audio p,
.player__error p {
  margin: 0;
  font-size: 1.1rem;
}

.player__no-audio-hint {
  font-size: .9rem !important;
  color: var(--text-muted);
}

/* ---------- сповіщення в застосунку ---------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(env(safe-area-inset-bottom) + 20px);
  transform: translateX(-50%);
  width: min(92vw, 560px);
  background: var(--text);
  color: var(--bg);
  padding: 14px 16px;
  border-radius: 14px;
  box-shadow: var(--shadow);
  font-size: .95rem;
  z-index: 60;
  text-align: center;
}

/* ---------- підвал ---------- */

.app-footer {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 16px calc(env(safe-area-inset-bottom) + 24px);
  color: var(--text-muted);
  font-size: .85rem;
}

.app-footer p { margin: 0 0 6px; }
.app-footer__meta { opacity: .9; }

/* ---------- планшет / десктоп ---------- */

@media (min-width: 720px) {
  .brand__title { font-size: 1.45rem; }
  .app-main { padding-top: 24px; }
}