/* Angličtina pro mámu – statická aplikace, mobilní first */

:root {
  --bg-top: #e8f0ff;
  --bg-bottom: #fdf6f0;
  --surface: #ffffff;
  --primary: #5c6bc0;
  --primary-dark: #3f4c9b;
  --accent: #b39ddb;
  --text: #2c2a35;
  --muted: #5a5668;
  --ok: #2e7d57;
  --ok-bg: #e3f4ea;
  --bad: #c62828;
  --bad-bg: #ffebee;
  --border: #dde4f5;
  --shadow: 0 10px 28px rgba(63, 76, 155, 0.1);
  --radius: 18px;
  --radius-sm: 14px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --tap: 48px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 18px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font);
  color: var(--text);
  background: linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
  line-height: 1.45;
}

.app-root {
  max-width: 520px;
  margin: 0 auto;
  padding: 1rem 1rem 5.5rem;
  min-height: 100dvh;
}

h1 {
  font-size: 1.45rem;
  font-weight: 700;
  margin: 0 0 0.35rem;
  color: var(--primary-dark);
}

h2 {
  font-size: 1.2rem;
  margin: 0 0 0.75rem;
  color: var(--primary-dark);
}

.card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  padding: 1.2rem 1.15rem 1.35rem;
  margin-bottom: 1rem;
}

.greeting {
  font-size: 1.1rem;
  margin: 0 0 0.35rem;
}

.subgreeting {
  font-size: 1rem;
  color: var(--muted);
  margin: 0 0 1rem;
}

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1rem;
}

.stat {
  flex: 1 1 28%;
  min-width: 5rem;
  background: #f3f6ff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.5rem;
  text-align: center;
}

.stat .lbl {
  display: block;
  font-size: 0.72rem;
  color: var(--muted);
}

.stat .val {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary-dark);
}

.btn {
  display: block;
  width: 100%;
  min-height: var(--tap);
  padding: 0.8rem 1rem;
  font-size: 1.05rem;
  font-family: inherit;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  transition: transform 0.06s ease, filter 0.12s ease;
}

.btn:active {
  transform: scale(0.99);
}

.btn-main {
  background: linear-gradient(135deg, var(--primary) 0%, #7e8ce0 100%);
  color: #fff;
  box-shadow: 0 4px 16px rgba(92, 107, 192, 0.35);
}

.btn-main:hover {
  filter: brightness(1.04);
}

.btn-line {
  background: var(--surface);
  color: var(--primary-dark);
  border: 2px solid var(--primary);
  margin-top: 0.55rem;
}

.btn-soft {
  background: #f0f3ff;
  color: var(--primary-dark);
  border: 1px solid var(--border);
  margin-top: 0.45rem;
  font-weight: 600;
}

.btn-quiet {
  background: transparent;
  color: var(--muted);
  border: 2px solid var(--border);
  margin-top: 0.45rem;
  font-size: 0.98rem;
}

.btn-danger {
  background: #fff5f5;
  color: var(--bad);
  border: 2px solid #ffcdd2;
  margin-top: 0.55rem;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.input-big {
  width: 100%;
  min-height: var(--tap);
  font-size: 1.1rem;
  padding: 0.7rem 0.9rem;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
}

.input-big:focus {
  outline: 3px solid rgba(92, 107, 192, 0.35);
  border-color: var(--primary);
}

.textarea-big {
  width: 100%;
  min-height: 140px;
  font-size: 0.95rem;
  padding: 0.75rem;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: ui-monospace, monospace;
  resize: vertical;
}

.hint {
  font-size: 0.88rem;
  color: var(--muted);
  margin-top: 0.45rem;
}

.back-row {
  margin-bottom: 0.75rem;
}

.back-link {
  display: inline-block;
  min-height: 44px;
  line-height: 44px;
  padding: 0 0.25rem;
  color: var(--primary-dark);
  font-weight: 600;
  text-decoration: none;
  border-radius: 8px;
}

.back-link:focus {
  outline: 2px solid var(--primary);
}

.lesson-card {
  width: 100%;
  text-align: left;
  padding: 1rem 1.05rem;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border);
  background: var(--surface);
  margin-bottom: 0.65rem;
  cursor: pointer;
  font-family: inherit;
}

.lesson-card:hover {
  border-color: var(--primary);
}

.lesson-card.done {
  border-color: var(--ok);
  background: #f8fffb;
}

.lesson-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
}

.lesson-head h3 {
  margin: 0;
  font-size: 1.05rem;
  color: var(--primary-dark);
}

.tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.45rem;
  border-radius: 8px;
  background: #e8ecff;
  color: var(--primary-dark);
}

.tag-ok {
  background: var(--ok-bg);
  color: var(--ok);
}

.lesson-desc {
  margin: 0.35rem 0 0.65rem;
  font-size: 0.92rem;
  color: var(--muted);
}

.ex-top {
  font-size: 0.95rem;
  color: var(--muted);
  margin-bottom: 0.65rem;
}

.q {
  font-size: 1.18rem;
  font-weight: 600;
  margin-bottom: 0.9rem;
  line-height: 1.35;
}

.type-hint {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.opts {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.opt {
  min-height: var(--tap);
  padding: 0.65rem 0.85rem;
  font-size: 1.02rem;
  font-family: inherit;
  text-align: left;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border);
  background: var(--surface);
  cursor: pointer;
}

.opt.pick {
  border-color: var(--primary);
  background: #f3f5ff;
}

.opt.good {
  border-color: var(--ok);
  background: var(--ok-bg);
}

.opt.bad {
  border-color: var(--bad);
  background: var(--bad-bg);
}

.feed {
  margin-top: 0.9rem;
  padding: 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 1rem;
}

.feed.ok {
  background: var(--ok-bg);
  border: 1px solid #a5d6b8;
}

.feed.bad {
  background: var(--bad-bg);
  border: 1px solid #f5b5b5;
}

.feed .label-line {
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.read-box {
  font-size: 1.22rem;
  font-weight: 600;
  padding: 1rem;
  background: #f3f6ff;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin: 0.65rem 0;
}

.words {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.chip {
  min-height: 44px;
  padding: 0.35rem 0.75rem;
  font-size: 1rem;
  border-radius: 999px;
  border: 2px solid var(--border);
  background: #fafbff;
  cursor: pointer;
  font-family: inherit;
}

.chip:disabled {
  opacity: 0.35;
  cursor: default;
}

.built {
  min-height: 3.25rem;
  padding: 0.65rem;
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 0.6rem;
  font-size: 1.02rem;
}

.row2 {
  display: flex;
  gap: 0.45rem;
}

.row2 .btn {
  flex: 1;
  margin-top: 0;
}

.toast {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  max-width: 520px;
  margin: 0 auto;
  padding: 0.65rem 1rem calc(0.65rem + env(safe-area-inset-bottom));
  font-size: 0.95rem;
  text-align: center;
  background: rgba(255, 255, 255, 0.96);
  border-top: 1px solid var(--border);
  color: var(--muted);
  z-index: 40;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.06);
}

.toast[hidden] {
  display: none;
}

.toast.err {
  background: #fff8f8;
  color: var(--bad);
}

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

.modal-bg {
  position: fixed;
  inset: 0;
  background: rgba(44, 42, 53, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 100;
}

.modal {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.2rem;
  max-width: 400px;
  width: 100%;
  box-shadow: var(--shadow);
}

.modal p {
  margin: 0 0 1rem;
  font-size: 1.02rem;
}

.settings-block {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
  color: var(--muted);
}

@media (min-width: 400px) {
  html {
    font-size: 19px;
  }
}