:root {
  --paper: #f3ebdc;
  --paper-dark: #e8dec9;
  --ink: #1a1814;
  --ink-soft: #4a443a;
  --ink-faint: #8a8275;
  --rust: #b8451f;
  --rust-deep: #8a3217;
  --moss: #5a6b3d;
  --moss-soft: rgba(90, 107, 61, 0.12);
  --rust-soft: rgba(184, 69, 31, 0.12);
  --line: #d6cbb3;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Fraunces', 'Noto Serif KR', Georgia, serif;
  font-feature-settings: "ss01", "ss02";
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior-y: none;
}

body {
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.1 0 0 0 0 0.09 0 0 0 0 0.07 0 0 0 0 0.08 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  opacity: 0.6;
  pointer-events: none;
  z-index: 1;
  mix-blend-mode: multiply;
}

.app {
  position: relative;
  z-index: 2;
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 24px 80px;
  min-height: 100vh;
}
@media (min-width: 600px) {
  .app { padding: 48px 32px 80px; }
}

/* ============ HEADER ============ */
header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--line);
  padding-bottom: 20px;
  margin-bottom: 32px;
}
.brand {
  font-family: 'Fraunces', serif;
  font-weight: 600;
  font-size: 26px;
  letter-spacing: -0.02em;
}
.brand .kr {
  font-family: 'Noto Serif KR', serif;
  font-weight: 600;
  margin-right: 8px;
}
.brand .dot { color: var(--rust); }
.stats {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: flex;
  gap: 8px;
  align-items: center;
}
.offline-badge {
  display: none;
  padding: 2px 6px;
  background: var(--rust-soft);
  color: var(--rust);
  border-radius: 2px;
  font-size: 9px;
}
body.offline .offline-badge { display: inline-block; }

/* ============ NAV ============ */
nav {
  display: flex;
  gap: 4px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
}
nav button {
  background: none;
  border: none;
  padding: 12px 16px;
  font-family: 'Fraunces', 'Noto Serif KR', serif;
  font-size: 15px;
  color: var(--ink-faint);
  cursor: pointer;
  position: relative;
  transition: color 0.2s;
}
nav button:hover { color: var(--ink-soft); }
nav button.active { color: var(--ink); font-weight: 600; }
nav button.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--rust);
}

.view { display: none; }
.view.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ LIBRARY ============ */
.word-list { list-style: none; }
.word-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) 90px;
  gap: 12px;
  align-items: center;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line);
  transition: background 0.15s;
  position: relative;
}
/* Mobile: tighten up for single-line display */
@media (max-width: 480px) {
  .word-item {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) 75px;
    gap: 8px;
    padding: 14px 0;
  }
  .word-kr { font-size: 15px; }
  .word-en { font-size: 15px; }
  /* Hide speaker buttons in library on mobile — still available on quiz cards */
  .word-cell .speak-btn { display: none; }
}
/* Only stack on very narrow screens */
@media (max-width: 360px) {
  .word-item {
    grid-template-columns: 1fr 75px;
    grid-template-rows: auto auto;
    gap: 3px 8px;
    padding: 12px 0;
  }
  .word-item .word-cell:nth-child(1) { grid-column: 1; grid-row: 1; }
  .word-item .word-cell:nth-child(2) { grid-column: 1; grid-row: 2; }
  .word-item .word-meta { grid-column: 2; grid-row: 1 / span 2; align-self: center; }
}
.word-item:hover, .word-item:active { background: rgba(184, 69, 31, 0.04); }
.word-cell { display: flex; align-items: center; gap: 6px; }
.word-kr {
  font-family: 'Noto Serif KR', serif;
  font-size: 18px;
  line-height: 1.4;
  font-weight: 500;
  color: var(--ink);
}
.word-en {
  font-family: 'Fraunces', serif;
  font-size: 18px;
  line-height: 1.4;
  font-style: italic;
  color: var(--ink-soft);
}
.word-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--ink-faint);
  display: flex;
  gap: 6px;
  align-items: center;
  justify-content: flex-end;
  white-space: nowrap;
}
.delete-btn {
  position: absolute;
  right: -32px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--ink-faint);
  cursor: pointer;
  font-size: 14px;
  padding: 6px 8px;
  transition: color 0.2s;
}
.delete-btn:hover { color: var(--rust); }
@media (hover: hover) {
  .delete-btn { opacity: 0; transition: opacity 0.2s, color 0.2s; }
  .word-item:hover .delete-btn { opacity: 1; }
}
/* On mobile (no hover), keep delete visible but smaller and inside */
@media (hover: none) {
  .delete-btn {
    position: static;
    transform: none;
    margin-left: 4px;
  }
}

/* ============ TTS BUTTON ============ */
.speak-btn {
  background: none;
  border: 1px solid transparent;
  color: var(--ink-faint);
  cursor: pointer;
  padding: 6px 8px;
  border-radius: 3px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}
.speak-btn:hover { color: var(--rust); border-color: var(--line); }
.speak-btn.playing {
  color: var(--rust);
  animation: pulse 0.8s ease-in-out infinite;
}
.speak-btn svg { width: 14px; height: 14px; }
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ============ MIC BUTTON ============ */
.mic-btn {
  background: none;
  border: 1px solid var(--line);
  color: var(--ink-faint);
  cursor: pointer;
  padding: 8px 10px;
  border-radius: 3px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.mic-btn:hover { color: var(--ink); border-color: var(--ink-faint); }
.mic-btn svg { width: 14px; height: 14px; }
.mic-btn.listening {
  color: var(--rust);
  border-color: var(--rust);
  background: var(--rust-soft);
  animation: micPulse 1s ease-in-out infinite;
}
@keyframes micPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(184, 69, 31, 0.4); }
  50% { box-shadow: 0 0 0 6px rgba(184, 69, 31, 0); }
}
.mic-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* Add form mic placement: row layout */
.field-with-mic {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}
.field-with-mic input { flex: 1; }

/* ============ PRONUNCIATION RESULT ============ */
.pronounce-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  width: 100%;
  flex-wrap: wrap;
}
.pronounce-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}
.pronounce-result {
  font-family: 'Fraunces', 'Noto Serif KR', serif;
  font-size: 14px;
  font-style: italic;
  padding: 4px 10px;
  border-radius: 3px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  animation: fadeIn 0.3s ease;
}
.pronounce-result.exact { color: var(--moss); background: var(--moss-soft); }
.pronounce-result.close { color: var(--ink-soft); background: rgba(184, 138, 31, 0.12); }
.pronounce-result.wrong { color: var(--rust); background: var(--rust-soft); }
.pronounce-result .heard {
  font-style: normal;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  opacity: 0.7;
}

.empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--ink-faint);
  font-style: italic;
}

/* ============ QUIZ ============ */
.quiz-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.quiz-controls-right { display: flex; flex-wrap: wrap; gap: 10px; }
.toggle-group {
  display: flex;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
}
.toggle-group button {
  background: none;
  border: none;
  padding: 6px 10px;
  font-family: inherit;
  font-size: 10px;
  color: var(--ink-faint);
  cursor: pointer;
  transition: all 0.15s;
}
.toggle-group button:disabled { opacity: 0.3; cursor: not-allowed; }
.toggle-group button.active { background: var(--ink); color: var(--paper); }

.card {
  background: #fffaf0;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 50px 28px;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow:
    0 1px 0 rgba(26,24,20,0.04),
    0 8px 24px -8px rgba(26,24,20,0.12);
  position: relative;
  transition: transform 0.2s;
}
@media (min-width: 600px) {
  .card { padding: 60px 40px; min-height: 280px; }
}
.card.clickable { cursor: pointer; }
.card.clickable:hover { transform: translateY(-2px); }
.card::before {
  content: '';
  position: absolute;
  top: 16px;
  right: 16px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--rust);
  opacity: 0.4;
}
.card-prompt {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-faint);
  margin-bottom: 20px;
}
.card-front {
  font-size: 36px;
  line-height: 1.2;
  text-align: center;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
@media (min-width: 600px) { .card-front { font-size: 44px; } }
.card-front.kr { font-family: 'Noto Serif KR', serif; font-weight: 500; }
.card-front.en { font-family: 'Fraunces', serif; font-weight: 400; font-style: italic; }
.card-front .speak-btn svg { width: 18px; height: 18px; }

.card-answer {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px dashed var(--line);
  width: 100%;
  text-align: center;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
@media (min-width: 600px) { .card-answer { font-size: 28px; } }
.card-answer.kr { font-family: 'Noto Serif KR', serif; font-weight: 400; color: var(--rust-deep); }
.card-answer.en { font-family: 'Fraunces', serif; font-style: italic; color: var(--rust-deep); }
.card-answer .speak-btn { color: var(--rust-deep); }
.card-note {
  margin-top: 12px;
  font-size: 13px;
  color: var(--ink-faint);
  font-style: italic;
  text-align: center;
}
.hint {
  margin-top: 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
  text-align: center;
}

.answer-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 20px;
}
.answer-buttons button {
  padding: 16px;
  border: 1px solid var(--line);
  background: transparent;
  font-family: 'Fraunces', 'Noto Serif KR', serif;
  font-size: 15px;
  cursor: pointer;
  border-radius: 3px;
  transition: all 0.15s;
}
.btn-wrong { color: var(--rust); border-color: rgba(184, 69, 31, 0.3); }
.btn-wrong:active, .btn-wrong:hover { background: var(--rust); color: var(--paper); border-color: var(--rust); }
.btn-right { color: var(--moss); border-color: rgba(90, 107, 61, 0.3); }
.btn-right:active, .btn-right:hover { background: var(--moss); color: var(--paper); border-color: var(--moss); }

/* ============ MULTIPLE CHOICE ============ */
.choice-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 20px;
}
.choice-btn {
  padding: 18px 14px;
  border: 1px solid var(--line);
  background: #fffaf0;
  font-family: 'Noto Serif KR', 'Fraunces', serif;
  font-size: 16px;
  color: var(--ink);
  cursor: pointer;
  border-radius: 3px;
  transition: all 0.15s;
  text-align: center;
  position: relative;
  min-height: 60px;
}
@media (min-width: 600px) { .choice-btn { font-size: 18px; padding: 20px 16px; } }
.choice-btn.en { font-family: 'Fraunces', serif; font-style: italic; }
.choice-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  border-color: var(--ink-faint);
  box-shadow: 0 4px 12px -4px rgba(26,24,20,0.15);
}
.choice-btn:disabled { cursor: default; }
.choice-btn.correct {
  background: var(--moss-soft);
  border-color: var(--moss);
  color: var(--moss);
  font-weight: 600;
}
.choice-btn.wrong {
  background: var(--rust-soft);
  border-color: var(--rust);
  color: var(--rust);
  animation: shake 0.4s ease;
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}
.choice-key {
  position: absolute;
  top: 6px;
  left: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
}

/* ============ ADD ============ */
.add-form { display: flex; flex-direction: column; gap: 18px; max-width: 520px; }
.field { display: flex; flex-direction: column; gap: 6px; }
label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}
input, textarea {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  padding: 10px 2px;
  font-family: 'Noto Serif KR', 'Fraunces', serif;
  font-size: 18px;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s;
  -webkit-appearance: none;
  border-radius: 0;
}
input:focus, textarea:focus { border-color: var(--rust); }
textarea { resize: vertical; min-height: 60px; font-size: 14px; font-style: italic; }
.submit-btn {
  align-self: flex-start;
  margin-top: 8px;
  padding: 14px 28px;
  background: var(--ink);
  color: var(--paper);
  border: none;
  font-family: 'Fraunces', serif;
  font-size: 15px;
  letter-spacing: 0.02em;
  cursor: pointer;
  border-radius: 2px;
  transition: background 0.2s;
}
.submit-btn:active, .submit-btn:hover { background: var(--rust); }

/* ============ TOAST ============ */
.toast {
  position: fixed;
  bottom: calc(32px + env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--ink);
  color: var(--paper);
  padding: 12px 24px;
  border-radius: 3px;
  font-family: 'Fraunces', 'Noto Serif KR', serif;
  font-size: 14px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  transition: transform 0.3s ease;
  z-index: 100;
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* ============ INSTALL PROMPT ============ */
.install-prompt {
  display: none;
  background: #fffaf0;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 14px 16px;
  margin-bottom: 20px;
  font-size: 13px;
  color: var(--ink-soft);
  align-items: center;
  gap: 12px;
  justify-content: space-between;
}
.install-prompt.show { display: flex; }
.install-prompt button {
  background: var(--ink);
  color: var(--paper);
  border: none;
  padding: 8px 14px;
  border-radius: 2px;
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  flex-shrink: 0;
}
.install-prompt .dismiss {
  background: none;
  color: var(--ink-faint);
  padding: 4px 8px;
  font-size: 18px;
}

.loading { text-align: center; padding: 40px; color: var(--ink-faint); font-style: italic; }

/* ============ SETTINGS ============ */
.settings-section {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
.settings-section:last-child { border-bottom: none; }
.settings-heading {
  font-family: 'Fraunces', 'Noto Serif KR', serif;
  font-weight: 600;
  font-size: 16px;
  margin-bottom: 16px;
  color: var(--ink);
}
.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
}
.setting-label {
  flex: 1;
  font-family: 'Fraunces', 'Noto Serif KR', serif;
  font-size: 15px;
  color: var(--ink);
}
.setting-hint {
  font-size: 12px;
  color: var(--ink-faint);
  font-style: italic;
  margin-top: 2px;
}
.setting-note {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--ink-faint);
  margin-top: 8px;
  letter-spacing: 0.05em;
}
.setting-note.dim { opacity: 0.7; }

/* Toggle switch */
.toggle {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--line);
  border-radius: 24px;
  transition: background 0.2s;
}
.toggle-slider::before {
  content: '';
  position: absolute;
  height: 18px;
  width: 18px;
  left: 3px;
  top: 3px;
  background: #fffaf0;
  border-radius: 50%;
  transition: transform 0.2s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.toggle input:checked + .toggle-slider { background: var(--rust); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); }
.toggle input:disabled + .toggle-slider { opacity: 0.4; cursor: not-allowed; }

/* Time input */
.time-input {
  background: transparent;
  border: 1px solid var(--line);
  padding: 8px 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  color: var(--ink);
  border-radius: 3px;
  outline: none;
  -webkit-appearance: none;
}
.time-input:focus { border-color: var(--rust); }

/* Settings tab nav button (the gear) */
nav button[data-view="settings"] {
  font-size: 16px;
  padding: 12px 12px;
}

/* ============ AUTH SCREEN ============ */
.auth-screen {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 24px;
}
.auth-card {
  background: #fffaf0;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 36px 28px;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 12px 40px -12px rgba(26,24,20,0.2);
}
.auth-brand {
  font-size: 28px;
  text-align: center;
  margin-bottom: 8px;
}
.auth-tagline {
  text-align: center;
  font-size: 13px;
  color: var(--ink-faint);
  font-style: italic;
  margin-bottom: 28px;
}
.auth-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
.auth-tab {
  flex: 1;
  background: none;
  border: none;
  padding: 10px 12px;
  font-family: 'Fraunces', 'Noto Serif KR', serif;
  font-size: 14px;
  color: var(--ink-faint);
  cursor: pointer;
  position: relative;
  transition: color 0.2s;
}
.auth-tab:hover { color: var(--ink-soft); }
.auth-tab.active { color: var(--ink); font-weight: 600; }
.auth-tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--rust);
}
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.auth-form .submit-btn {
  width: 100%;
  text-align: center;
  margin-top: 4px;
}
.auth-error {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--rust);
  background: var(--rust-soft);
  padding: 8px 12px;
  border-radius: 3px;
  display: none;
  white-space: pre-wrap;
}
.auth-error.show { display: block; }
.auth-hint {
  font-size: 11px;
  color: var(--ink-faint);
  text-align: center;
  margin-top: 16px;
  font-style: italic;
}
.auth-footer {
  margin-top: 24px;
  border: none;
}

/* Link-style button (signout) */
.link-btn {
  background: none;
  border: none;
  padding: 0 0 0 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: var(--line);
  transition: color 0.15s;
}
.link-btn:hover { color: var(--rust); text-decoration-color: var(--rust); }

/* ============ FOOTER ============ */
.app-footer {
  margin-top: 60px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--ink-faint);
  letter-spacing: 0.08em;
  opacity: 0.6;
  cursor: default;
  transition: opacity 0.2s;
}
.app-footer:hover { opacity: 1; }
.app-footer .version-updated {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 5px;
  background: var(--moss-soft);
  color: var(--moss);
  border-radius: 2px;
  font-size: 9px;
  letter-spacing: 0.05em;
  animation: fadeIn 0.4s ease;
}