:root {
  --bg: #FDF5E6;
  --bg-1: #FDFBF7;
  --bg-2: #F5EFE6;
  --bg-3: #E8DCCB;
  --bg-4: #DBCBB2;

  --accent: #6F4E37;
  --accent-2: #8B5E3C;
  --accent-3: #5A3D2B;
  --accent-soft: #F2E8DF;

  --text: #3E2723;
  --text-2: #5D4037;
  --text-3: #8D6E63;
  --text-4: #A1887F;

  --border: #D7CCC8;
  --ok: #689F38;
  --err: #D32F2F;
  --warn: #FBC02D;

  --soft-shadow: 0 4px 12px rgba(111, 78, 55, 0.08);
  --transition: all .2s ease;
}

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

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Kanit', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
  font-size: 15px;
  line-height: 1.6;
  overflow: hidden;
  transition: var(--transition);
}

h1, h2, h3 {
  font-family: 'Playfair Display', serif;
  color: var(--accent);
}

button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; transition: var(--transition); }
input { font: inherit; color: inherit; }

.app-container {
  display: grid;
  grid-template-columns: 1fr;
  height: 100vh;
  height: 100dvh;
}

.main-content {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  height: 100vh;
  height: 100dvh;
  max-width: 480px;
  margin: 0 auto;
  width: 100%;
  background: var(--bg);
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border);
  min-height: 64px;
  z-index: 10;
}

.top-bar h1 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.bar-right { display: flex; align-items: center; gap: 10px; }

.chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-2);
  border-radius: 20px;
}

.chat-viewport {
  overflow-y: auto;
  padding: 24px;
  padding-bottom: 100px;
  background: var(--bg);
}

.welcome-message {
  max-width: 360px;
  margin: 0 auto;
  padding: 60px 20px;
  text-align: center;
}

.welcome-message h1 {
  font-size: 28px;
  margin-bottom: 12px;
}

.welcome-message p {
  color: var(--text-2);
  font-size: 14px;
}

/* ============ FORMS & CARDS ============ */
.register-form, .shop-screen, .admin-screen, .cart-screen, .payment-screen {
  max-width: 360px;
  margin: 0 auto;
  padding: 0 12px;
}

.form-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  box-shadow: var(--soft-shadow);
  padding: 24px;
  border-radius: 20px;
}

.form-header {
  text-align: center;
  margin-bottom: 24px;
}

.form-header h2 {
  font-size: 20px;
  margin-bottom: 6px;
}

.form-subtitle {
  font-size: 13px;
  color: var(--text-3);
}

.form-body {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.input-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-3);
  margin-bottom: 4px;
  display: block;
}

.input-wrapper-single {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrapper-single input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 12px 14px;
  font-size: 14px;
  color: var(--text);
  outline: none;
  border-radius: 12px;
  transition: var(--transition);
}

.input-wrapper-single input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.input-suffix {
  position: absolute;
  right: 12px;
  font-size: 11px;
  color: var(--text-4);
}

.input-hint {
  font-size: 11px;
  color: var(--text-3);
  margin-top: -8px;
}

.error-message {
  font-size: 12px;
  color: var(--err);
  padding: 8px 12px;
  background: #fff5f5;
  border: 1px solid var(--err);
  border-radius: 8px;
  display: none;
}

.error-message:not([hidden]) { display: block; }

.btn-primary {
  width: 100%;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  padding: 12px 16px;
  border-radius: 12px;
  text-align: center;
  transition: var(--transition);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-2);
  transform: translateY(-1px);
}

.btn-primary:disabled {
  background: var(--bg-3);
  color: var(--text-4);
  cursor: not-allowed;
}

.btn-secondary {
  width: 100%;
  background: var(--bg-2);
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  padding: 10px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  text-align: center;
}

.btn-secondary:hover { background: var(--bg-3); color: var(--accent); }

/* ============ SHOP MENU ============ */
.menu-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.user-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: var(--transition);
}

.user-item:hover { background: var(--bg-3); }

.user-avatar {
  width: 50px;
  height: 50px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  border-radius: 12px;
  flex: none;
  overflow: hidden;
}

.user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.user-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  flex: 1;
}

.user-badge {
  font-size: 10px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 2px 8px;
  border-radius: 10px;
}

/* ============ SUCCESS SCREENS ============ */
.success-screen {
  max-width: 360px;
  margin: 0 auto;
  padding: 40px 20px;
  text-align: center;
}

.success-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  box-shadow: var(--soft-shadow);
  padding: 40px 24px;
  border-radius: 24px;
}

.success-icon {
  font-size: 48px;
  margin-bottom: 16px;
  display: block;
}

.success-card h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.success-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
}

.success-sub {
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 24px;
}

/* ============ USERS LIST ============ */
.users-list {
  max-width: 360px;
  margin: 0 auto;
  padding: 0 20px 20px;
}

.list-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 12px;
  padding: 0 4px;
}

.list-header h3 {
  font-size: 12px;
  color: var(--text-3);
  text-transform: uppercase;
}

.user-items {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.user-item.current-user {
  border-color: var(--accent);
}

/* ============ FOOTER ============ */
.input-container {
  padding: 16px 24px;
  background: var(--bg-1);
  border-top: 1px solid var(--border);
  position: relative;
}

.footer-content {
  max-width: 360px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: center;
}

.footer-status {
  font-size: 11px;
  font-weight: 600;
  color: var(--ok);
}

.footer-hint {
  font-size: 11px;
  color: var(--text-3);
}

@media (max-width: 480px) {
  .main-content { max-width: 100%; }
}