/* =============================================================================
 * Reddably — login page
 * =============================================================================
 * Standalone, centered login card. Every color, font, radius, spacing, shadow
 * and motion value resolves from a tokens.css variable — no literals. Light
 * mode only.
 * ========================================================================== */

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

html,
body {
  margin: 0;
  height: 100%;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--font-size-4);
  line-height: var(--leading-base);
  -webkit-font-smoothing: antialiased;
}

/* Shared focus style — visible, token-based focus ring. */
:focus-visible {
  outline: var(--focus-ring-width) solid var(--color-focus-ring);
  outline-offset: var(--focus-ring-offset);
  border-radius: var(--radius-1);
}

/* -----------------------------------------------------------------------------
 * Layout: center the card on the page.
 * -------------------------------------------------------------------------- */
.login {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--space-6);
}

/* -----------------------------------------------------------------------------
 * Card
 * -------------------------------------------------------------------------- */
.login-card {
  width: 100%;
  max-width: 400px;
  padding: var(--space-8);
  background: var(--color-surface);
  border: var(--border-width-1) solid var(--color-border);
  border-radius: var(--radius-4);
  box-shadow: var(--shadow-2);
}

/* Wordmark */
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
}

.wordmark__mark {
  /* Two-ring mark is 10:7 (viewBox 100x70); keep aspect so the rings aren't stretched. */
  height: var(--space-7);
  width: calc(var(--space-7) * 10 / 7);
  display: block;
}

.wordmark__text {
  font-family: var(--font-display);
  font-size: var(--font-size-5);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--tracking-wide);
}

.login-card__heading {
  margin: var(--space-6) 0 var(--space-1);
  font-family: var(--font-display);
  font-size: var(--font-size-7);
  font-weight: var(--font-weight-semibold);
  line-height: var(--leading-tight);
}

.login-card__subhead {
  margin: 0 0 var(--space-6);
  color: var(--color-text-muted);
  font-size: var(--font-size-3);
}

/* -----------------------------------------------------------------------------
 * Form
 * -------------------------------------------------------------------------- */
.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* The `display: flex` above outranks the UA stylesheet's `[hidden]` rule, so
 * `form.hidden = true` (invite.html, when the invite token is missing) would
 * otherwise leave the form visible and submittable. */
.login-form[hidden] {
  display: none;
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.field__label {
  font-size: var(--font-size-3);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-strong);
}

.field__input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--font-size-4);
  color: var(--color-text);
  background: var(--color-surface);
  border: var(--border-width-1) solid var(--color-border-strong);
  border-radius: var(--radius-2);
  transition: border-color var(--motion-fast) var(--ease-standard);
}

.field__input::placeholder {
  color: var(--color-text-subtle);
}

.field__input:hover {
  border-color: var(--color-primary);
}

.field__input:focus {
  border-color: var(--color-primary);
}

/* Generic inline error region. */
.login-form__error {
  margin: 0;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-3);
  color: var(--color-danger);
  background: var(--color-primary-wash);
  border: var(--border-width-1) solid var(--color-danger);
  border-radius: var(--radius-2);
}

.login-form__error[hidden] {
  display: none;
}

/* -----------------------------------------------------------------------------
 * Button
 * -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: var(--space-9);
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-body);
  font-size: var(--font-size-4);
  font-weight: var(--font-weight-semibold);
  border: var(--border-width-1) solid transparent;
  border-radius: var(--radius-2);
  cursor: pointer;
  transition: background var(--motion-fast) var(--ease-standard);
}

.btn--primary {
  margin-top: var(--space-2);
  background: var(--color-primary);
  color: var(--color-on-primary);
}

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

.btn[disabled] {
  background: var(--color-text-disabled);
  cursor: progress;
}

/* -----------------------------------------------------------------------------
 * Responsive — tighten the frame on small screens so the card doesn't feel
 * cramped edge-to-edge on a phone. Additive: desktop rendering is unchanged.
 * -------------------------------------------------------------------------- */
@media (max-width: 480px) {
  .login {
    padding: var(--space-4);
    align-items: flex-start;
  }

  .login-card {
    padding: var(--space-6);
  }

  .login-card__heading {
    font-size: var(--font-size-6);
  }
}