:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #5e6b7b;
  --canvas: #eef3f8;
  --panel: #f8fafc;
  --panel-soft: #eaf2fb;
  --field: #f4f7fb;
  --line: #d4dfeb;
  --line-strong: #b8c8db;
  --accent: #2f70b7;
  --accent-hover: #255f9d;
  --accent-soft: #e4f1ff;
  --danger: #b4232f;
  --danger-soft: #fff0f1;
  --success: #267153;
  --focus: #0875cc;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* { box-sizing: border-box; }

html { background: var(--canvas); }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, #f4f7fa 0, var(--canvas) 30rem),
    var(--canvas);
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
}

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

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

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 10;
  padding: 0.75rem 1rem;
  color: #ffffff;
  background: var(--accent-hover);
  border-radius: 0.5rem;
  box-shadow: 0 0.5rem 1.5rem rgb(30 64 100 / 18%);
  transform: translateY(-200%);
}

.skip-link:focus { transform: none; }

.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
  width: min(70rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  color: var(--ink);
  font-size: 1.35rem;
  font-weight: 760;
  letter-spacing: -0.035em;
  text-decoration: none;
}

.wordmark:hover { color: var(--accent); }

.tagline {
  color: var(--muted);
  font-size: 0.88rem;
}

.page-shell {
  width: min(70rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(3rem, 8vw, 6.5rem) 0;
}

.hero-card,
.auth-card {
  width: min(100%, 48rem);
  padding: clamp(1.5rem, 5vw, 3.5rem);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 1rem;
  box-shadow:
    0 1px 2px rgb(27 54 84 / 5%),
    0 1.25rem 3.5rem rgb(27 54 84 / 9%);
}

.auth-card {
  width: min(100%, 34rem);
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  max-width: 20ch;
  margin: 0 0 1rem;
  color: var(--ink);
  font-size: clamp(2.1rem, 5vw, 3.2rem);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.038em;
}

.auth-card h1 {
  font-size: clamp(1.9rem, 4.5vw, 2.5rem);
  letter-spacing: -0.035em;
}

p {
  color: var(--muted);
  line-height: 1.65;
}

.hero-copy {
  max-width: 42rem;
  font-size: 1.08rem;
}

form { margin-top: 1.75rem; }

.field { margin-bottom: 1.2rem; }

.field label {
  display: block;
  margin-bottom: 0.45rem;
  font-weight: 700;
}

input[type="email"],
input[type="password"],
input[type="text"],
select,
textarea {
  width: 100%;
  min-height: 3rem;
  padding: 0.72rem 0.85rem;
  color: var(--ink);
  background: var(--field);
  border: 1px solid var(--line-strong);
  border-radius: 0.55rem;
  box-shadow: inset 0 1px 2px rgb(27 54 84 / 4%);
  font: inherit;
}

input:hover,
select:hover,
textarea:hover { border-color: #8fa7c1; }

input:focus,
select:focus,
textarea:focus { border-color: var(--accent); }

.field--error input { border-color: var(--danger); }

.field-errors {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
  color: var(--danger);
}

.check-field {
  display: flex;
  gap: 0.55rem;
  align-items: center;
  margin: 1rem 0 1.4rem;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.75rem;
}

.button-row form { margin: 0; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: 0.72rem 1.05rem;
  color: #ffffff;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 0.55rem;
  box-shadow: 0 0.2rem 0.7rem rgb(47 112 183 / 14%);
  cursor: pointer;
  font: inherit;
  font-weight: 750;
  text-decoration: none;
}

.button:hover {
  color: #ffffff;
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.button--secondary {
  color: var(--ink);
  background: var(--panel);
  border-color: var(--line-strong);
  box-shadow: none;
}

.button--secondary:hover {
  color: var(--accent-hover);
  background: var(--accent-soft);
  border-color: #9bbce0;
}

.button--danger {
  color: #ffffff;
  background: var(--danger);
  border-color: var(--danger);
}

.button--danger:hover {
  color: #ffffff;
  background: #941d27;
  border-color: #941d27;
}

.messages {
  width: min(100%, 43rem);
  margin: 0 auto 1.25rem;
}

.message {
  padding: 0.8rem 1rem;
  color: var(--ink);
  background: var(--panel-soft);
  border: 1px solid #c8ddf5;
  border-left: 4px solid var(--accent);
  border-radius: 0.4rem;
}

.message--success { border-left-color: var(--success); }

.message--error {
  background: var(--danger-soft);
  border-color: #f1c7cb;
  border-left-color: var(--danger);
}

.auth-links,
.auth-switch {
  margin-top: 1.5rem;
}

.auth-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
}

@media (max-width: 38rem) {
  .tagline { display: none; }
  .page-shell { padding-top: 2rem; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after { scroll-behavior: auto !important; }
}