/* The access gate's sign-in page: the app's look (fonts, colours, fields), nothing that names it. */
:root {
  --primary-300: #e86161;
  --primary-500: #bd2324;
  --primary-600: #9f1d1e;
  --primary-700: #781517;

  --bg: #ffffff;
  --text: #111827;
  --text-faint: #6b7280;
  --label: #374151;
  --border: #d1d5db;
  --border-strong: #9ca3af;
  --focus: rgb(189 35 36 / 0.15);
  --danger: #dc2626;
  --danger-ring: rgb(239 68 68 / 0.2);
  --alert-bg: #fef2f2;
  --alert-border: #fecaca;
  --alert-text: #991b1b;
  --hint: #92400e;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #030712;
    --text: #f3f4f6;
    --text-faint: #9ca3af;
    --label: #e5e7eb;
    --border: #374151;
    --border-strong: #6b7280;
    --focus: rgb(223 60 60 / 0.2);
    --danger: #f87171;
    --danger-ring: rgb(248 113 113 / 0.25);
    --alert-bg: rgb(69 10 10 / 0.3);
    --alert-border: rgb(127 29 29 / 0.6);
    --alert-text: #fecaca;
    --hint: #fcd34d;
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Poppins', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

[hidden] {
  display: none !important;
}

.page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: 2rem max(1rem, env(safe-area-inset-right)) calc(2rem + env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
}

.form-wrap {
  width: 100%;
  max-width: 24rem;
}

h1 {
  margin: 0;
  font-family: 'Montserrat', sans-serif;
  font-size: 1.875rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.alert {
  margin: 1.25rem 0 0;
  padding: 1rem;
  border: 1px solid var(--alert-border);
  border-radius: 1rem;
  background: var(--alert-bg);
  color: var(--alert-text);
  font-size: 0.875rem;
}

/* Always in the page, so screen readers announce a message the moment it is written into it. */
.alert:empty {
  display: none;
}

form {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}

.field label {
  display: block;
  margin-bottom: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--label);
}

input[type='text'],
input[type='password'] {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  /* 16px: anything smaller makes iOS zoom in on focus. */
  font-size: 1rem;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

input[type='text']:hover,
input[type='password']:hover {
  border-color: var(--border-strong);
}

input[type='text']:focus,
input[type='password']:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 4px var(--focus);
}

input[aria-invalid='true'],
input[aria-invalid='true']:hover,
input[aria-invalid='true']:focus {
  border-color: var(--danger);
  box-shadow: 0 0 0 4px var(--danger-ring);
}

.password {
  position: relative;
}

.password input {
  padding-right: 3.25rem;
}

.toggle {
  position: absolute;
  top: 50%;
  right: 0.375rem;
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 0;
  border-radius: 0.75rem;
  background: transparent;
  color: var(--text-faint);
  cursor: pointer;
  transform: translateY(-50%);
  transition: color 0.15s;
}

.toggle:hover {
  color: var(--primary-500);
}

.toggle:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: -2px;
}

.toggle svg {
  width: 1.25rem;
  height: 1.25rem;
}

.toggle .icon-hide,
.toggle[aria-pressed='true'] .icon-show {
  display: none;
}

.toggle[aria-pressed='true'] .icon-hide {
  display: block;
}

.field-error {
  margin: 0.5rem 0 0;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--danger);
}

.hint {
  margin: 0.5rem 0 0;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--hint);
}

.remember {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: fit-content;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--label);
  cursor: pointer;
}

.remember input {
  flex: none;
  width: 1.125rem;
  height: 1.125rem;
  margin: 0;
  accent-color: var(--primary-500);
  cursor: pointer;
}

.remember input:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

.submit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  min-height: 3rem;
  padding: 0.75rem 1rem;
  border: 0;
  border-radius: 1rem;
  background: var(--primary-600);
  color: #fff;
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: 0 1px 2px rgb(0 0 0 / 0.05);
  cursor: pointer;
  transition: background-color 0.15s, box-shadow 0.15s;
}

.submit:hover {
  background: var(--primary-700);
}

.submit:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgb(189 35 36 / 0.3);
}

.submit[aria-busy='true'] {
  cursor: progress;
  opacity: 0.85;
}

.spinner {
  display: none;
  width: 1rem;
  height: 1rem;
  border: 2px solid rgb(255 255 255 / 0.4);
  border-top-color: #fff;
  border-radius: 999px;
  animation: spin 0.7s linear infinite;
}

.submit[aria-busy='true'] .spinner {
  display: inline-block;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }

  /* Slower, but the spinner still has to show that something is happening. */
  .spinner {
    animation-duration: 1.5s;
  }
}