:root {
  --color-primary: #0abab5;
  --tiffany: var(--color-primary, #0abab5);
  --tiffany-dark: #089691;
  --tiffany-light: #e6f9f8;
  --text: #1a1a1a;
  --text-muted: #5c5c5c;
  --bg: #fafafa;
  --white: #ffffff;
  --error: #c0392b;
  --success: #1e8449;
  --radius: 12px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --font: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --tap-min: 48px;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100dvh;
}

.page {
  max-width: 420px;
  margin: 0 auto;
  padding: 1rem 1rem 2rem;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0 1.25rem;
}

.logo {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--tiffany-dark);
}

#lang-toggle {
  background: var(--white);
  border: 1px solid var(--tiffany);
  color: var(--tiffany-dark);
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-size: 0.875rem;
  min-height: var(--tap-min);
  min-width: var(--tap-min);
  cursor: pointer;
}

main {
  flex: 1;
}

h1 {
  font-size: 1.5rem;
  margin: 0 0 0.5rem;
  font-weight: 700;
}

.hint {
  margin: -0.25rem 0 0.75rem;
  font-size: 0.875rem;
  color: var(--color-muted, #5c6b73);
  line-height: 1.4;
}

.hint {
  margin: -0.25rem 0 0.75rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.subtitle {
  color: var(--text-muted);
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

input[type='text'],
input[type='tel'],
input[type='email'],
input[type='password'] {
  width: 100%;
  font-size: 1rem;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  min-height: var(--tap-min);
}

input:focus {
  outline: 2px solid var(--tiffany);
  border-color: var(--tiffany);
}

.field-group {
  margin-bottom: 0.25rem;
}

.field-group.hidden {
  display: none;
}

.link-btn {
  background: none;
  border: none;
  color: var(--tiffany-dark);
  text-decoration: underline;
  font-size: 0.9rem;
  padding: 0.5rem 0;
  cursor: pointer;
  min-height: var(--tap-min);
  text-align: left;
}

.btn-primary {
  display: block;
  width: 100%;
  background: var(--tiffany);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  font-size: 1.05rem;
  font-weight: 600;
  padding: 0.875rem 1rem;
  min-height: var(--tap-min);
  cursor: pointer;
  margin-top: 0.5rem;
}

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

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.message {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  margin: 1rem 0;
}

.message.error {
  background: #fdecea;
  color: var(--error);
}

.message.success {
  background: #e8f8ef;
  color: var(--success);
}

.text-link {
  display: inline-block;
  color: var(--tiffany-dark);
  margin-top: 1rem;
  font-size: 0.9rem;
}

/* Balance page */
.merchant-balance-heading {
  font-size: 1.5rem;
  font-weight: bold;
  margin: 0 0 0.35rem;
  color: var(--tiffany-dark);
  line-height: 1.2;
}

.greeting {
  font-size: 1.125rem;
  margin-bottom: 1rem;
}

.stat-big {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--tiffany-dark);
  line-height: 1.1;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.star-row {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin: 0.75rem 0 1rem;
}

.star {
  font-size: 1.75rem;
  color: #ddd;
}

.star.filled {
  color: var(--tiffany);
}

.referral-box {
  background: var(--tiffany-light);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
  margin: 1rem 0;
}

.referral-code {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--tiffany-dark);
  margin: 0.5rem 0;
}

.referral-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.reward-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.reward-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid #eee;
}

.reward-item:last-child {
  border-bottom: none;
}

.reward-code {
  font-family: ui-monospace, monospace;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--tiffany-dark);
}

.rewards-count {
  font-weight: 600;
  color: var(--success);
  margin-bottom: 0.75rem;
}

.till-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 1.5rem;
  padding: 0.75rem;
  background: var(--tiffany-light);
  border-radius: var(--radius);
}

footer {
  text-align: center;
  padding-top: 1rem;
}

footer a {
  color: var(--tiffany-dark);
  font-size: 0.875rem;
}

.product-footer {
  margin: 0.75rem 0 0;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.loading-screen {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

.admin-header-actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
}

.admin-header-actions #lang-toggle {
  flex-shrink: 0;
}

.admin-header .staff-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

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

.staff-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  flex: 1;
  text-align: center;
}

.btn-text {
  background: none;
  border: none;
  color: var(--tiffany-dark);
  font-size: 0.875rem;
  padding: 0.5rem;
  min-height: var(--tap-min);
  cursor: pointer;
}

.btn-secondary {
  display: block;
  width: 100%;
  background: var(--tiffany-light);
  color: var(--tiffany-dark);
  border: 2px solid var(--tiffany);
  border-radius: var(--radius);
  padding: 0.875rem 1rem;
  font-size: 1.05rem;
  font-weight: 600;
  min-height: var(--tap-min);
  cursor: pointer;
  margin-top: 0.75rem;
}

.btn-secondary:hover,
.btn-secondary:focus {
  background: var(--tiffany);
  color: var(--white);
}

.admin-footer {
  margin-top: auto;
}

.section-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin: 0 0 0.35rem;
  color: var(--text);
}

.section-hint {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0 0 1rem;
}

.till-section {
  margin-bottom: 1rem;
}

.till-success .message {
  margin-top: 0;
}

.till-link-btn {
  display: block;
  text-align: center;
  text-decoration: none;
  margin-top: 0;
}

@media (max-width: 360px) {
  h1 {
    font-size: 1.35rem;
  }

  .stat-big {
    font-size: 2rem;
  }

  .star {
    font-size: 1.5rem;
  }
}