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

:root {
  --surface: #f7f9fb;
  --surface-container-lowest: #ffffff;
  --surface-container: #eceef0;
  --on-surface: #191c1e;
  --on-surface-variant: #434655;
  --outline: #737686;
  --outline-variant: #c3c6d7;
  --primary: #004ac6;
  --primary-hover: #003ea8;
  --on-primary: #ffffff;
  --error: #ba1a1a;
  --radius-sm: 2px;
  --radius: 4px;
  --radius-lg: 8px;
}

body {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  line-height: 20px;
  color: var(--on-surface);
  background-color: var(--surface);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  -webkit-font-smoothing: antialiased;
}

/* Card */
.card {
  width: 100%;
  max-width: 420px;
  background: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  animation: fadeUp 0.3s ease both;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Form */
form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

label {
  font-size: 12px;
  font-weight: 600;
  line-height: 16px;
  letter-spacing: 0.05em;
  color: var(--on-surface);
  text-transform: uppercase;
}

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

.input-wrap .icon {
  position: absolute;
  left: 8px;
  display: flex;
  align-items: center;
  pointer-events: none;
  color: var(--outline);
}

.input-wrap .icon svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.input-wrap .toggle {
  position: absolute;
  right: 8px;
  display: flex;
  align-items: center;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--outline);
  padding: 2px;
  border-radius: var(--radius-sm);
  transition: color 0.15s;
}

.input-wrap .toggle:hover {
  color: var(--on-surface);
}

.input-wrap .toggle svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

input[type="email"],
input[type="password"],
input[type="text"] {
  width: 100%;
  height: 40px;
  padding: 0 8px 0 36px;
  background: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius);
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  line-height: 20px;
  color: var(--on-surface);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

input[type="password"] {
  font-family: monospace;
  font-size: 16px;
  letter-spacing: 0.15em;
  padding-right: 36px;
}

input::placeholder {
  color: var(--outline);
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  letter-spacing: normal;
}

input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(0, 74, 198, 0.15);
}

input:invalid:not(:placeholder-shown):not(:focus) {
  border-color: var(--error);
}

/* Submit */
.btn-primary {
  width: 100%;
  height: 48px;
  background: var(--primary);
  color: var(--on-primary);
  border: none;
  border-radius: var(--radius);
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background-color 0.15s, transform 0.1s;
  margin-top: 8px;
}

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

.btn-primary:active {
  transform: scale(0.995);
}

.btn-primary svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
  opacity: 0.85;
}

/* Feedback messages */
.error-msg {
  background: #fdeaea;
  color: var(--error);
  padding: 12px;
  border-radius: var(--radius);
  font-size: 13px;
  margin-bottom: 20px;
  text-align: center;
  border: 1px solid rgba(186, 26, 26, 0.2);
}

/* Common Layout Helpers */
.text-center {
  text-align: center;
}

.mb-32 {
  margin-bottom: 32px;
}

.title {
  font-size: 24px;
  font-weight: 700;
  line-height: 32px;
  letter-spacing: -0.02em;
  color: var(--on-surface);
}

/* Utilities */
.p-20 { padding: 20px; }
.mt-32 { margin-top: 32px; }
.my-10 { margin: 10px 0; }
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.gap-12 { gap: 12px; }
.text-sm { font-size: 13px; }
.text-variant { color: var(--on-surface-variant); }
.font-bold { font-weight: 700; }

.btn-secondary {
  text-decoration: none;
  background: var(--surface-container);
  color: var(--on-surface);
  border: 1px solid var(--outline-variant);
  transition: background-color 0.15s;
}

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