/* ── Variables ── */
:root {
  --bg: #0D0D1A;
  --bg2: #141428;
  --card: #1A1A35;
  --card-hover: #22224A;
  --accent: #7C3AED;
  --accent-light: #9F67FF;
  --accent-glow: rgba(124, 58, 237, 0.25);
  --text: #F1F5F9;
  --text2: #94A3B8;
  --text3: #64748B;
  --border: rgba(255,255,255,0.07);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 8px 32px rgba(0,0,0,0.5);
}

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

html, body {
  height: 100%;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
               'Noto Sans KR', 'Noto Sans SC', 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}

/* ── View transitions ── */
.view {
  position: fixed;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
  transform: translateY(12px);
}
.view.active {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

/* ── Buttons ── */
button { cursor: pointer; border: none; background: none; font-family: inherit; }

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: opacity 0.2s, transform 0.2s, box-shadow 0.2s;
}
.btn-primary:hover:not(:disabled) {
  opacity: 0.92;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px var(--accent-glow);
}
.btn-primary:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
.btn-full { width: 100%; }

.btn-ghost {
  padding: 8px 16px;
  color: var(--text2);
  font-size: 0.875rem;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}
.btn-ghost:hover { color: var(--text); background: var(--card); }

.btn-icon { font-size: 1.2rem; padding: 8px 12px; }

/* ── Login View ── */
#login-view {
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(124,58,237,0.18) 0%, transparent 55%),
    radial-gradient(ellipse at 80% 80%, rgba(56,189,248,0.1) 0%, transparent 55%);
  pointer-events: none;
}

.login-card {
  position: relative;
  width: 100%;
  max-width: 420px;
  margin: 20px;
  padding: 48px 40px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow), 0 0 80px rgba(124,58,237,0.08);
}

.login-logo { text-align: center; margin-bottom: 36px; }

.logo-icon {
  font-size: 3rem;
  line-height: 1;
  margin-bottom: 16px;
  filter: drop-shadow(0 0 24px rgba(124,58,237,0.6));
}

.app-title {
  font-size: 1.75rem;
  font-weight: 700;
  background: linear-gradient(135deg, #fff, #A78BFA);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
}

.app-subtitle { color: var(--text2); font-size: 0.875rem; }

/* form */
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text2);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.form-group input {
  width: 100%;
  padding: 13px 16px;
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}
.form-group input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-group input::placeholder { color: var(--text3); }

.error-msg {
  font-size: 0.85rem;
  color: #F87171;
  background: rgba(248,113,113,0.08);
  border: 1px solid rgba(248,113,113,0.2);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 16px;
}
.hidden { display: none !important; }

/* ── Language Selection View ── */
#language-view {
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

.lang-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.user-greeting {
  font-size: 1rem;
  color: var(--text2);
}

.user-greeting span {
  font-weight: 600;
  color: var(--text);
}

.lang-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  overflow-y: auto;
}

.lang-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 8px;
  text-align: center;
}

.lang-subtitle {
  color: var(--text2);
  margin-bottom: 48px;
  text-align: center;
}

.lang-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  width: 100%;
  max-width: 480px;
  margin-bottom: 40px;
}

.lang-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 28px 16px;
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s, background 0.2s, transform 0.15s, box-shadow 0.2s;
}

.lang-card:hover {
  background: var(--card-hover);
  border-color: rgba(124,58,237,0.4);
  transform: translateY(-3px);
}

.lang-card.selected {
  border-color: var(--accent);
  background: rgba(124,58,237,0.12);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.lang-flag { font-size: 2.8rem; line-height: 1; }

.lang-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
}

.lang-native {
  font-size: 0.8rem;
  color: var(--text2);
}

.btn-start {
  font-size: 1.05rem;
  padding: 16px 40px;
  min-width: 240px;
}

.arrow { transition: transform 0.2s; }
.btn-start:hover:not(:disabled) .arrow { transform: translateX(4px); }

/* ── Chat View ── */
#chat-view {
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.chat-header-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.chat-flag { font-size: 2rem; }

.chat-lang-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.chat-status-label {
  font-size: 0.75rem;
  color: #4ADE80;
  display: flex;
  align-items: center;
  gap: 4px;
}
.chat-status-label::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: #4ADE80;
  border-radius: 50%;
}

/* Messages */
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  scroll-behavior: smooth;
}

.messages::-webkit-scrollbar { width: 4px; }
.messages::-webkit-scrollbar-track { background: transparent; }
.messages::-webkit-scrollbar-thumb { background: var(--card); border-radius: 4px; }

.msg-row {
  display: flex;
  gap: 10px;
  max-width: 75%;
  animation: fadeUp 0.25s ease;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.msg-row.user { align-self: flex-end; flex-direction: row-reverse; }
.msg-row.ai   { align-self: flex-start; }

.msg-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
  align-self: flex-end;
}

.msg-bubble {
  padding: 12px 16px;
  border-radius: 18px;
  font-size: 0.95rem;
  line-height: 1.6;
  word-break: break-word;
  white-space: pre-wrap;
}

.msg-row.user .msg-bubble {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: #fff;
  border-bottom-right-radius: 4px;
}

.msg-row.ai .msg-bubble {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

/* Typing indicator */
.typing-dots {
  display: flex;
  gap: 5px;
  padding: 4px 2px;
}
.typing-dots span {
  width: 7px;
  height: 7px;
  background: var(--text3);
  border-radius: 50%;
  animation: bounce 1.1s infinite;
}
.typing-dots span:nth-child(2) { animation-delay: 0.18s; }
.typing-dots span:nth-child(3) { animation-delay: 0.36s; }

@keyframes bounce {
  0%, 60%, 100% { transform: translateY(0); }
  30%            { transform: translateY(-6px); }
}

/* Input area */
.chat-input-wrap {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  padding: 14px 16px;
  background: var(--bg2);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.msg-textarea {
  flex: 1;
  padding: 12px 16px;
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: 24px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  resize: none;
  outline: none;
  overflow-y: auto;
  max-height: 140px;
  line-height: 1.5;
  transition: border-color 0.2s;
}
.msg-textarea:focus { border-color: var(--accent); }
.msg-textarea::placeholder { color: var(--text3); }

.btn-send {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: opacity 0.2s, transform 0.15s;
}
.btn-send:hover { opacity: 0.88; transform: scale(1.05); }
.btn-send:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

/* ── Responsive ── */
@media (max-width: 480px) {
  .login-card { padding: 36px 24px; }
  .lang-header { padding: 16px 20px; }
  .lang-title { font-size: 1.4rem; }
  .lang-subtitle { margin-bottom: 32px; }
  .lang-grid { gap: 12px; }
  .lang-card { padding: 22px 12px; }
  .lang-flag { font-size: 2.2rem; }
  .msg-row { max-width: 88%; }
}

/* Mic Button */
.btn-mic {
    width: 44px;
    height: 44px;
    background: var(--card);
    color: var(--text2);
    border: 1.5px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
      cursor: pointer;
    transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s;
}
.btn-mic:hover {
    background: var(--accent);
      color: #fff;
    border-color: var(--accent);
    transform: scale(1.05);
}
.btn-mic.recording {
    background: #e53e3e;
    color: #fff;
    border-color: #e53e3e;
    animation: pulse 1s infinite;
}
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}
}
}
}
}