:root {
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --bg: #08111f;
  --header: #0b1626;
  --panel: #101c2e;
  --panel-hover: #14243a;

  --text: #f4f7fb;
  --muted: #a9b6c9;

  --line: #2b3b54;
  --line-hover: #405574;

  --accent: #3998f7;
  --accent-light: #71b7ff;

  --danger: #ff9c9c;
  --success: #94e2b1;
  --warning: #ffd38a;

  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
}

header {
  background: #162338;
  border-bottom: 1px solid var(--line);
}

/* Navigation */

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;

  width: 100%;
  max-width: 1100px;
  min-height: 64px;

  margin: 0 auto;
  padding: 0 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;

  margin-right: auto;

  color: var(--text);
  font-weight: 750;
  font-size: 1.1rem;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;

  width: 32px;
  height: 32px;

  background: var(--accent);
  color: #07111e;

  border-radius: 8px;

  font-size: .95rem;
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: .95rem;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-form {
  margin: 0;
}

.nav-button {
  padding: .45rem .75rem;

  background: transparent;
  color: var(--muted);

  border: 1px solid var(--line);
  border-radius: 6px;
}

.nav-button:hover {
  color: var(--text);
  border-color: var(--line-hover);
  background: var(--panel);
}

/* Main layout */

main {
  width: 100%;
  max-width: 1100px;

  margin: 0 auto;
  padding: 4rem 1rem;
}

/* Authentication / generic form card */

.auth-card {
  width: 100%;
  max-width: 500px;

  margin: 0 auto;
  padding: 2.25rem;

  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;

  box-shadow: 0 20px 60px rgb(0 0 0 / 25%);
}

.auth-header {
  margin-bottom: 1.75rem;
}

.eyebrow {
  margin: 0 0 .35rem;

  color: var(--accent-light);
  text-transform: uppercase;
  letter-spacing: .1em;

  font-size: .75rem;
  font-weight: 700;
}

h1 {
  margin: 0;
  color: var(--text);

  font-size: 2rem;
  line-height: 1.25;
}

.auth-explanation {
  margin: .65rem 0 0;
  color: var(--muted);
}

/* Forms */

.auth-form {
  display: grid;
  gap: 1.25rem;
}

.form-field {
  display: grid;
  gap: .4rem;
}

label {
  color: var(--text);
  font-weight: 600;
  font-size: .9rem;
}

input, select, textarea {
  width: 100%;
  min-height: 44px;

  padding: .7rem .8rem;

  font: inherit;
  color: var(--text);
  background: #0b1626;

  border: 1px solid var(--line);
  border-radius: 7px;

  transition:
    border-color .15s ease,
    box-shadow .15s ease;
}

input:hover, select:hover, textarea:hover {
  border-color: var(--line-hover);
}

input:focus, select:focus, textarea:focus {
  outline: none;

  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgb(57 152 247 / 14%);
}

input[type="checkbox"] {
  width: auto;
  min-height: auto;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: .6rem;
}

.checkbox-row label {
  margin: 0;
}

.helptext {
  color: var(--muted);
  font-size: .85rem;
}

.field-errors, .errorlist {
  margin: .15rem 0 0;
  color: var(--danger);
  font-size: .88rem;
}

.errorlist {
  padding-left: 1.25rem;
}

.form-field-error input, .form-field-error select, .form-field-error textarea {
  border-color: var(--danger);
}

.form-actions {
  margin-top: .2rem;
}

button {
  font: inherit;
  cursor: pointer;
}

.primary {
  min-width: 120px;

  padding: .65rem 1rem;

  background: var(--accent);
  color: #07111e;

  border: 1px solid var(--accent);
  border-radius: 7px;

  font-weight: 700;
}

.primary:hover {
  background: var(--accent-light);
  border-color: var(--accent-light);
}

.form-alert, .notice {
  margin-bottom: 1.25rem;
  padding: .85rem 1rem;

  background: rgb(57 152 247 / 10%);
  border: 1px solid rgb(57 152 247 / 25%);
  border-left: 2px solid var(--accent);
  border-radius: 7px;
}

a {
  color: var(--accent-light);
}

:focus-visible {
  outline: 3px solid var(--accent-light);
  outline-offset: 3px;
}

/* Mobile */
@media (max-width: 640px) {
  .site-nav {
    align-items: flex-start;
    flex-direction: column;
    gap: .75rem;
    padding-top: .85rem;
    padding-bottom: .85rem;
  }

  .brand {
    margin-right: 0;
  }

  .nav-links {
    width: 100%;
    flex-wrap: wrap;
  }

  main {
    padding-top: 2rem;
  }

  .auth-card {
    padding: 1.5rem;
  }
}