/* ========================================
   Persona Studio · HoloLake Visual Style
   ======================================== */

:root {
  --primary: #0969da;
  --primary-light: #ddf4ff;
  --primary-dark: #0550ae;
  --accent: #00d4aa;
  --bg: #f6f8fa;
  --bg-card: #ffffff;
  --text: #1f2328;
  --text-secondary: #656d76;
  --border: #d0d7de;
  --border-light: #e8ecf0;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ---- Layout ---- */
.container {
  max-width: 900px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---- Guest Mode ---- */
.guest-divider {
  margin: 1.2rem 0;
  text-align: center;
  position: relative;
}

.guest-divider::before,
.guest-divider::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 40%;
  height: 1px;
  background: var(--border);
}

.guest-divider::before { left: 0; }
.guest-divider::after { right: 0; }

.guest-divider span {
  background: var(--bg-card);
  padding: 0 0.8rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.btn-guest {
  width: 100%;
  padding: 0.8rem;
  font-size: 1.05rem;
  background: linear-gradient(135deg, var(--accent), #0969da);
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: opacity 0.2s;
  font-weight: 500;
}

.btn-guest:hover { opacity: 0.9; }
.btn-guest:disabled { opacity: 0.6; cursor: not-allowed; }

.guest-hint {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ---- Login Page ---- */
.login-container {
  justify-content: center;
  align-items: center;
  padding: 2rem;
}

.logo-area {
  text-align: center;
  margin-bottom: 2rem;
}

.logo-area h1 {
  font-size: 2.4rem;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.login-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.login-box h2 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

.hint {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.login-box input[type="text"] {
  width: 100%;
  padding: 0.8rem 1rem;
  font-size: 1.2rem;
  text-align: center;
  letter-spacing: 2px;
  border: 2px solid var(--border);
  border-radius: 8px;
  outline: none;
  transition: border-color 0.2s;
  margin-bottom: 1rem;
}

.login-box input[type="text"]:focus {
  border-color: var(--primary);
}

.login-box button[type="submit"] {
  width: 100%;
  padding: 0.8rem;
  font-size: 1.1rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
}

.login-box button[type="submit"]:hover {
  background: var(--primary-dark);
}

.login-box button[type="submit"]:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.error-msg {
  margin-top: 1rem;
  padding: 0.6rem 1rem;
  background: #fef2f2;
  color: #dc2626;
  border-radius: 6px;
  font-size: 0.9rem;
}

.login-footer {
  margin-top: 2rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ---- Chat Page ---- */
.chat-container {
  padding: 0;
}

.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 1.2rem;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.persona-name {
  font-size: 1.2rem;
  font-weight: 600;
}

.persona-role {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.dev-id-badge {
  background: var(--primary-light);
  color: var(--primary);
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
}

/* ---- Chat Body ---- */
.chat-body {
  flex: 1;
  overflow-y: auto;
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.message {
  display: flex;
  gap: 0.8rem;
  max-width: 85%;
  animation: fadeIn 0.3s ease;
}

.message-persona {
  align-self: flex-start;
}

.message-user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.message-system {
  align-self: center;
  max-width: 90%;
}

.avatar {
  font-size: 1.5rem;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.msg-content {
  padding: 0.8rem 1rem;
  border-radius: var(--radius);
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}

.message-persona .msg-content {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow);
}

.message-user .msg-content {
  background: var(--primary);
  color: #fff;
}

.message-system .msg-content {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.9rem;
  text-align: center;
}

/* ---- Chat Input ---- */
.chat-input-area {
  padding: 0.8rem 1.2rem;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
}

.input-row {
  display: flex;
  gap: 0.6rem;
  align-items: flex-end;
}

.input-row textarea {
  flex: 1;
  padding: 0.7rem 1rem;
  font-size: 1rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  resize: none;
  outline: none;
  font-family: inherit;
  line-height: 1.5;
  max-height: 120px;
  transition: border-color 0.2s;
}

.input-row textarea:focus {
  border-color: var(--primary);
}

.input-row button {
  padding: 0.7rem 1.2rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s;
}

.input-row button:hover {
  background: var(--primary-dark);
}

.input-row button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.action-row {
  margin-top: 0.6rem;
  display: flex;
  justify-content: flex-end;
}

.btn-build {
  padding: 0.6rem 1.5rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: opacity 0.2s;
}

.btn-build:hover {
  opacity: 0.9;
}

/* ---- Buttons ---- */
.btn-primary {
  padding: 0.6rem 1.5rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-secondary {
  padding: 0.5rem 1rem;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-secondary:hover {
  background: var(--bg);
}

/* ---- Modal ---- */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 100;
}

.modal-content {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 2rem;
  width: 90%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
}

.modal-content h3 {
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.modal-content input[type="email"] {
  width: 100%;
  padding: 0.7rem 1rem;
  font-size: 1rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  outline: none;
  margin-bottom: 1rem;
  transition: border-color 0.2s;
}

.modal-content input[type="email"]:focus {
  border-color: var(--primary);
}

.modal-actions {
  display: flex;
  gap: 0.8rem;
  justify-content: flex-end;
}

/* ---- Animation ---- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- Responsive ---- */
@media (max-width: 600px) {
  .logo-area h1 {
    font-size: 1.8rem;
  }

  .login-box {
    padding: 1.5rem;
  }

  .chat-header {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .persona-role {
    display: none;
  }

  .message {
    max-width: 92%;
  }
}