:root {
  --bg: #f2f2f7;
  --text: #1a1a1a;
  --hint: #8e8e93;
  --link: #007aff;
  --btn: #007aff;
  --btn-text: #ffffff;
  --card-bg: #ffffff;
  --border: rgba(0,0,0,0.12);
  --red: #ff3b30;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  -webkit-tap-highlight-color: transparent;
}

.wrap {
  width: 100%;
  max-width: 400px;
}

.logo {
  text-align: center;
  margin-bottom: 32px;
}

.logo-icon {
  font-size: 56px;
  margin-bottom: 8px;
}

.logo-title {
  font-size: 26px;
  font-weight: 700;
}

.card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 28px 24px;
  box-shadow: var(--card-shadow);
}

.card h2 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 20px;
  text-align: center;
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--hint);
  margin-bottom: 6px;
}

.field input {
  width: 100%;
  padding: 14px 16px;
  font-size: 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  color: var(--text);
  outline: none;
  transition: border-color 0.2s;
}

.field input:focus {
  border-color: var(--btn);
}

.btn {
  display: block;
  width: 100%;
  padding: 16px;
  background: var(--btn);
  color: var(--btn-text);
  border: none;
  border-radius: 14px;
  font-size: 17px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
  transition: opacity 0.2s;
}

.btn:hover {
  opacity: 0.9;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.switch-text {
  text-align: center;
  font-size: 14px;
  color: var(--hint);
  margin-top: 18px;
}

.switch-text a {
  color: var(--link);
  text-decoration: none;
  font-weight: 500;
}

.error, .error-msg {
  background: rgba(255, 59, 48, 0.1);
  color: var(--red);
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 16px;
  text-align: center;
}

.btn-secondary {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { opacity: 0.8; }

.hidden {
  display: none !important;
}

/* Desktop centering */
@media (min-width: 600px) {
  body {
    background: #e8e8ed;
  }
}