/* Lamsa لمسة — all colors via CSS variables (spec §8) */

:root {
  --bg-a: #0f172a;
  --bg-b: #1e1b4b;
  --accent: #5eead4;
  --accent-2: #7dd3fc;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --surface: rgba(148, 163, 184, 0.08);
  --surface-solid: #1e293b;
  --surface-raised: #16213e;
  --border: rgba(148, 163, 184, 0.25);
  --danger: #f87171;
  --on-accent: #0f172a;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
  --word-hover: rgba(94, 234, 212, 0.18);
}

[data-theme="light"] {
  --bg-a: #f8fafc;
  --bg-b: #eef2f7;
  --accent: #0d9488;
  --accent-2: #0369a1;
  --text: #0f172a;
  --text-dim: #64748b;
  --surface: rgba(15, 23, 42, 0.04);
  --surface-solid: #ffffff;
  --surface-raised: #ffffff;
  --border: #dbe2ea;
  --danger: #dc2626;
  --on-accent: #ffffff;
  --shadow: 0 8px 30px rgba(15, 23, 42, 0.15);
  --word-hover: rgba(13, 148, 136, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  height: 100%;
}

body {
  margin: 0;
  min-height: 100%;
  font-family: system-ui, 'Segoe UI', 'Noto Sans Arabic', sans-serif;
  color: var(--text);
  background: linear-gradient(160deg, var(--bg-a), var(--bg-b)) fixed;
  line-height: 1.6;
}

button {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px 16px;
  cursor: pointer;
  min-height: 42px;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}

button:hover:not(:disabled) {
  border-color: var(--accent);
}

button:active:not(:disabled) {
  transform: scale(0.97);
}

button:disabled {
  opacity: 0.45;
  cursor: default;
}

button.primary {
  background: var(--accent);
  color: var(--on-accent);
  border-color: transparent;
  font-weight: 600;
}

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

select,
input,
textarea {
  font: inherit;
  color: var(--text);
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
}

select:focus,
input:focus,
textarea:focus,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.hidden {
  display: none !important;
}

/* ===== header ===== */

.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 16px;
  background: var(--bg-a);
  background: color-mix(in srgb, var(--bg-a) 85%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.3px;
}

.brand-en {
  color: var(--accent);
}

.brand-ar {
  color: var(--accent-2);
  margin-inline-start: 6px;
}

.header-actions {
  display: flex;
  gap: 6px;
}

.icon-btn {
  position: relative;
  padding: 6px 10px;
  min-width: 42px;
  font-size: 18px;
  line-height: 1.2;
}

.badge {
  position: absolute;
  top: -6px;
  right: -6px;
  min-width: 19px;
  height: 19px;
  padding: 0 5px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--on-accent);
  font-size: 12px;
  font-weight: 700;
  line-height: 19px;
  text-align: center;
}

#quizBtn.highlight {
  border-color: var(--accent);
  box-shadow: 0 0 10px color-mix(in srgb, var(--accent) 55%, transparent);
}

/* ===== layout ===== */

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 20px 16px 60px;
}

.view {
  display: block;
}

/* ===== input view ===== */

.lang-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-bottom: 14px;
  color: var(--text-dim);
}

.lang-row label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.lang-dot {
  color: var(--text-dim);
}

#inputText {
  width: 100%;
  min-height: 220px;
  resize: vertical;
  font-size: 17px;
  line-height: 1.7;
}

.input-meta {
  margin: 6px 2px 12px;
  color: var(--text-dim);
  font-size: 14px;
}

.input-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.input-actions .primary {
  flex: 1;
  min-width: 160px;
}

.pdf-progress {
  margin-top: 14px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--accent-2);
}

.pdf-progress.error {
  color: var(--danger);
  border-color: var(--danger);
}

.hint-box {
  margin-top: 22px;
  padding: 14px 16px;
  border: 1px dashed var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text-dim);
  font-size: 14.5px;
}

.hint-box strong {
  color: var(--accent);
}

/* ===== reader view ===== */

.reader-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 16px;
}

.font-controls {
  display: flex;
  gap: 6px;
}

.reader-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 24px;
  line-height: 1.9;
}

.reader-content p {
  margin: 0 0 1.1em;
}

.word {
  cursor: pointer;
  border-radius: 4px;
  padding: 1px 1px;
  transition: background 0.12s;
}

.word:hover,
.word.active {
  background: var(--word-hover);
  color: var(--accent);
}

.page-marker {
  margin: 26px 0 18px;
  text-align: center;
  font-size: 12.5px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-marker::before,
.page-marker::after {
  content: "";
  flex: 1;
  border-top: 1px solid var(--border);
}

/* ===== tooltip ===== */

.tooltip {
  position: fixed;
  z-index: 200;
  max-width: min(320px, calc(100vw - 16px));
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  font-size: 14.5px;
  line-height: 1.55;
}

.tt-word {
  font-size: 12.5px;
  color: var(--text-dim);
  margin-bottom: 2px;
}

.tt-trans {
  font-weight: 700;
  font-size: 16.5px;
  color: var(--accent);
}

.tt-divider {
  border-top: 1px dashed var(--border);
  margin: 8px 0;
}

.tt-ex {
  font-size: 13.5px;
}

.tt-ext {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 2px;
}

.tt-loading {
  font-size: 18px;
  color: var(--text-dim);
  letter-spacing: 2px;
}

.tt-error {
  color: var(--danger);
  font-size: 13.5px;
}

/* ===== phrase button ===== */

.phrase-btn {
  position: fixed;
  z-index: 190;
  background: var(--accent);
  color: var(--on-accent);
  border: none;
  font-weight: 600;
  box-shadow: var(--shadow);
}

/* ===== vocabulary panel ===== */

.overlay {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(2, 6, 23, 0.55);
}

.vocab-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 100;
  width: min(380px, 92vw);
  display: flex;
  flex-direction: column;
  background: var(--surface-raised);
  border-left: 1px solid var(--border);
  box-shadow: var(--shadow);
  transform: translateX(105%);
  transition: transform 0.25s ease;
}

.vocab-panel.open {
  transform: translateX(0);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}

.panel-header h2 {
  margin: 0;
  font-size: 18px;
}

.vocab-list {
  flex: 1;
  overflow-y: auto;
  padding: 10px 16px;
}

.vocab-empty {
  color: var(--text-dim);
  font-size: 14.5px;
}

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

.vocab-top {
  display: flex;
  align-items: center;
  gap: 10px;
}

.vocab-word {
  font-weight: 700;
  flex: 1;
  min-width: 0;
  overflow-wrap: anywhere;
}

.vocab-del {
  min-height: 32px;
  padding: 2px 9px;
  font-size: 13px;
  color: var(--text-dim);
}

.vocab-del:hover {
  color: var(--danger);
  border-color: var(--danger);
}

.vocab-trans {
  color: var(--accent);
  font-size: 14.5px;
}

.vocab-ex {
  color: var(--text-dim);
  font-size: 13px;
  margin-top: 2px;
}

.panel-footer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}

.panel-footer button {
  font-size: 14px;
  padding: 8px 6px;
}

/* ===== mastery dots ===== */

.mastery {
  display: inline-flex;
  gap: 4px;
  align-items: center;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1px solid var(--text-dim);
  display: inline-block;
}

.dot.filled {
  background: var(--accent);
  border-color: var(--accent);
}

/* ===== quiz ===== */

.quiz-screen {
  max-width: 480px;
  margin: 24px auto 0;
  text-align: center;
}

.quiz-big {
  font-size: 52px;
  margin-bottom: 6px;
}

.quiz-meta {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--text-dim);
  font-size: 13.5px;
  margin-bottom: 14px;
}

.quiz-tag {
  border: 1px solid var(--accent-2);
  color: var(--accent-2);
  border-radius: 20px;
  padding: 0 10px;
}

.quiz-tag.second {
  border-color: var(--accent);
  color: var(--accent);
}

.quiz-card {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  min-height: 230px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  cursor: pointer;
  user-select: none;
}

.card-face {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.card-word {
  font-size: 30px;
  font-weight: 700;
}

.card-hint {
  color: var(--text-dim);
  font-size: 13px;
}

.card-trans {
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
}

.card-ex {
  font-size: 15.5px;
}

.card-ext {
  font-size: 14px;
  color: var(--text-dim);
}

.quiz-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.quiz-actions button {
  min-width: 140px;
}

.quiz-sub {
  color: var(--text-dim);
}

.quiz-exit {
  margin-top: 22px;
  border: none;
  background: none;
  color: var(--text-dim);
  font-size: 13.5px;
  min-height: 36px;
}

/* ===== settings modal ===== */

.modal {
  position: fixed;
  inset: 0;
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(2, 6, 23, 0.6);
}

.modal-card {
  width: min(440px, 100%);
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 20px 22px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-card h2 {
  margin: 0 0 16px;
  font-size: 19px;
}

.field {
  display: block;
  margin-bottom: 14px;
  font-size: 14.5px;
  color: var(--text-dim);
}

.field input {
  display: block;
  width: 100%;
  margin-top: 5px;
  color: var(--text);
}

.field-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-bottom: 14px;
  font-size: 14.5px;
  color: var(--text-dim);
}

.field-row label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 6px;
}

/* ===== toast ===== */

.toast {
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 300;
  max-width: min(420px, calc(100vw - 24px));
  padding: 11px 18px;
  border-radius: 12px;
  background: var(--surface-raised);
  border: 1px solid var(--accent);
  box-shadow: var(--shadow);
  font-size: 14.5px;
  text-align: center;
}

.toast.error {
  border-color: var(--danger);
  color: var(--danger);
}

/* ===== responsive ===== */

@media (max-width: 480px) {
  .brand {
    font-size: 17px;
  }

  main {
    padding: 14px 10px 50px;
  }

  .reader-content {
    padding: 16px 14px;
  }

  .panel-footer {
    grid-template-columns: 1fr 1fr;
  }

  .quiz-actions button {
    min-width: 120px;
  }
}