* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #242836;
  --border: #2e3345;
  --text: #e4e6f0;
  --text-dim: #8b8fa3;
  --accent: #006aa7;
  --accent-hover: #0080cc;
  --yellow: #fecc02;
  --green: #34d399;
  --red: #f87171;
  --orange: #fb923c;
  --radius: 16px;
  --nav-height: 64px;
  --header-height: 56px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.screen { display: none; height: 100%; }
.screen.active { display: flex; flex-direction: column; }

/* ===== AUTH ===== */
.auth-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  gap: 0.5rem;
}

.auth-container h1 {
  font-size: 2rem;
  background: linear-gradient(135deg, var(--accent), var(--yellow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-subtitle { color: var(--text-dim); margin-bottom: 2rem; }

#auth-form {
  width: 100%;
  max-width: 320px;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

#auth-form input {
  padding: 0.85rem 1rem;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
}

#auth-form input:focus { outline: none; border-color: var(--accent); }

.error-text { color: var(--red); font-size: 0.85rem; text-align: center; min-height: 1.2em; }

/* Buttons */
.btn-primary {
  padding: 0.85rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.2s;
}

.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:active { transform: scale(0.98); }

.btn-ghost {
  padding: 0.7rem;
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.btn-ghost:hover { color: var(--text); border-color: var(--text-dim); }
.btn-full { width: 100%; }
.btn-small { font-size: 0.8rem; padding: 0.5rem 0.8rem; }

.icon-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 0.4rem;
  border-radius: 50%;
  transition: all 0.2s;
}

.icon-btn:hover { color: var(--text); background: var(--surface2); }
.icon-btn svg { width: 22px; height: 22px; }

/* ===== APP LAYOUT ===== */
#app-screen {
  position: relative;
  flex-direction: column;
}

/* ===== BOTTOM NAV ===== */
#bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(var(--nav-height) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 50;
}

.nav-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 0.4rem 0.6rem;
  font-size: 0.65rem;
  transition: color 0.2s;
  min-width: 0;
}

.nav-btn svg { width: 22px; height: 22px; flex-shrink: 0; }
.nav-btn span { white-space: nowrap; }
.nav-btn.active { color: var(--yellow); }
.nav-btn:hover { color: var(--text); }

/* ===== CHAT PANELS ===== */
.chat-panel {
  display: none;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: var(--nav-height);
  padding-bottom: var(--safe-bottom);
}

.chat-panel.active { display: flex; }

.chat-header {
  height: var(--header-height);
  padding: 0 1rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.chat-header h2 { font-size: 1.05rem; font-weight: 700; }
.header-hint { color: var(--text-dim); font-size: 0.75rem; flex: 1; }

/* User menu */
.user-menu {
  position: absolute;
  top: var(--header-height);
  right: 0.5rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.user-menu.hidden { display: none; }
.menu-user { font-size: 0.85rem; color: var(--text-dim); }

/* Messages area */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  -webkit-overflow-scrolling: touch;
}

/* Message bubbles */
.bubble {
  max-width: 85%;
  padding: 0.7rem 1rem;
  border-radius: var(--radius);
  animation: fadeUp 0.25s ease;
  word-wrap: break-word;
  line-height: 1.5;
  font-size: 0.95rem;
}

@keyframes fadeUp { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.bubble.user {
  align-self: flex-end;
  background: var(--accent);
  color: white;
  border-bottom-right-radius: 4px;
}

.bubble.assistant {
  align-self: flex-start;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.bubble.system {
  align-self: center;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--yellow);
  font-style: italic;
  text-align: center;
  max-width: 95%;
  font-size: 0.9rem;
}

.bubble .label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  margin-bottom: 0.3rem;
  font-weight: 600;
}

.bubble .swedish {
  color: var(--yellow);
  font-weight: 500;
  font-size: 1.05rem;
}

.bubble .translation-text {
  color: var(--text-dim);
  font-size: 0.85rem;
  font-style: italic;
  margin-top: 0.25rem;
}

.bubble .correction {
  background: var(--surface);
  border-radius: 8px;
  padding: 0.5rem 0.7rem;
  margin-top: 0.4rem;
  font-size: 0.85rem;
}

.bubble .correction .orig { color: var(--red); text-decoration: line-through; }
.bubble .correction .fix { color: var(--green); font-weight: 600; }
.bubble .correction .expl { color: var(--text-dim); font-size: 0.8rem; display: block; margin-top: 0.15rem; }

.bubble .rating {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.rating-great { background: rgba(52,211,153,0.15); color: var(--green); }
.rating-good { background: rgba(254,204,2,0.15); color: var(--yellow); }
.rating-needs_work { background: rgba(248,113,113,0.15); color: var(--red); }

.bubble .phrases {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.5rem;
}

.phrase-tag {
  display: inline-block;
  background: rgba(0,106,167,0.2);
  color: var(--accent-hover);
  padding: 0.2rem 0.55rem;
  border-radius: 12px;
  font-size: 0.78rem;
}

.bubble .grammar-note {
  padding: 0.3rem 0 0.3rem 0.7rem;
  border-left: 2px solid var(--accent);
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-top: 0.3rem;
}

.bubble .alt {
  color: var(--yellow);
  font-size: 0.9rem;
  margin-top: 0.2rem;
}

.bubble .note {
  color: var(--text-dim);
  font-size: 0.8rem;
  font-style: italic;
  margin-top: 0.3rem;
}

/* Situation bar */
.situation-bar {
  padding: 0.5rem 1rem;
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.btn-situation {
  width: 100%;
  padding: 0.6rem;
  background: var(--surface2);
  color: var(--yellow);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s;
}

.btn-situation:hover { border-color: var(--yellow); }

/* Input bar */
.chat-input-bar {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  padding: 0.6rem 0.8rem;
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.chat-input-bar textarea {
  flex: 1;
  padding: 0.65rem 1rem;
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 24px;
  font-size: 0.95rem;
  font-family: inherit;
  resize: none;
  max-height: 120px;
  line-height: 1.4;
  overflow-y: auto;
}

.chat-input-bar textarea:focus { outline: none; border-color: var(--accent); }
.chat-input-bar textarea::placeholder { color: var(--text-dim); }

.send-btn {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s, transform 0.1s;
}

.send-btn svg { width: 20px; height: 20px; }
.send-btn:hover { background: var(--accent-hover); }
.send-btn:active { transform: scale(0.92); }

/* ===== STATS ===== */
.stats-content {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  -webkit-overflow-scrolling: touch;
}

.stats-section { margin-bottom: 1.5rem; }
.stats-section h3 {
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.badge {
  background: var(--surface2);
  color: var(--text-dim);
  padding: 0.1rem 0.5rem;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 600;
}

.stats-list {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
}

.stats-list:empty::after {
  content: "Nothing here yet";
  display: block;
  padding: 1.5rem;
  color: var(--text-dim);
  font-style: italic;
  text-align: center;
  font-size: 0.85rem;
}

.stats-item {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.stats-item:last-child { border-bottom: none; }
.stats-item .count { color: var(--text-dim); font-size: 0.75rem; }
.stats-item .orig { color: var(--red); text-decoration: line-through; }
.stats-item .fix { color: var(--green); }

/* ===== LOADING ===== */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,17,23,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.loading-overlay.hidden { display: none; }

.typing-indicator {
  display: flex;
  gap: 5px;
  padding: 0.8rem 1.2rem;
  background: var(--surface2);
  border-radius: 20px;
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  background: var(--text-dim);
  border-radius: 50%;
  animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

.hidden { display: none !important; }

/* ===== DESKTOP ===== */
@media (min-width: 768px) {
  #bottom-nav {
    top: 0;
    bottom: auto;
    height: 52px;
    padding-bottom: 0;
    border-top: none;
    border-bottom: 1px solid var(--border);
    justify-content: center;
    gap: 0.5rem;
  }

  .nav-btn { flex-direction: row; gap: 6px; font-size: 0.8rem; padding: 0.5rem 1rem; }
  .nav-btn svg { width: 18px; height: 18px; }

  .chat-panel {
    top: 52px;
    bottom: 0;
    max-width: 700px;
    margin: 0 auto;
    left: 0;
    right: 0;
  }

  .chat-messages { padding: 1.5rem; }
  .bubble { max-width: 70%; }
}