/* Hallmark · macrostructure: Split Studio · genre: modern-minimal
 * theme: custom · design-system: design.md · designed-as-app
 * contrast: WCAG AA · mobile: mobile-first · pre-emit critique: P5 H5 E5 S5 R5 V4
 */

* { box-sizing: border-box; }

html,
body { overflow-x: clip; }

body {
  min-width: 20rem;
  min-height: 100dvh;
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

button,
input { font: inherit; }

button:focus-visible,
input:focus-visible {
  outline: var(--rule-fine) solid var(--color-focus);
  outline-offset: var(--space-3xs);
  box-shadow: 0 0 0 var(--rule-fine) var(--color-focus-inner);
}

.login-shell {
  min-height: 100dvh;
  display: grid;
}

.identity {
  min-height: 19rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-xl);
  padding: max(var(--space-lg), env(safe-area-inset-top)) var(--space-md) var(--space-lg);
  background: var(--color-sidebar);
  color: var(--color-sidebar-ink);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-wordmark);
  font-size: var(--text-md);
  letter-spacing: 0.08em;
}

.brand span {
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  border: var(--rule-hair) solid var(--color-sidebar-rule);
  border-radius: var(--radius-input);
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.identity-copy { max-width: 33rem; }

.identity-copy p {
  margin: 0 0 var(--space-sm);
  color: var(--color-sidebar-muted);
  font-size: var(--text-sm);
}

.identity-copy h1 {
  max-width: 11em;
  min-width: 0;
  margin: 0 0 var(--space-sm);
  overflow-wrap: anywhere;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 8vw, 4rem);
  font-style: normal;
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.1;
}

.identity-copy span {
  display: block;
  max-width: 34rem;
  color: var(--color-sidebar-muted);
  line-height: 1.65;
}

.login-panel {
  display: grid;
  align-items: start;
  padding: var(--space-xl) var(--space-md) max(var(--space-xl), env(safe-area-inset-bottom));
}

form {
  width: min(26rem, 100%);
  display: grid;
  gap: var(--space-md);
  margin-inline: auto;
}

header { display: grid; gap: var(--space-2xs); }

header h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  font-style: normal;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.15;
}

header p {
  margin: 0;
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.field {
  display: grid;
  gap: var(--space-2xs);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.field input {
  width: 100%;
  height: 3rem;
  padding-inline: var(--space-sm);
  border: var(--rule-hair) solid var(--color-rule-2);
  border-radius: var(--radius-input);
  outline: var(--rule-fine) solid transparent;
  outline-offset: var(--rule-hair);
  background: var(--color-surface);
  color: var(--color-ink);
}

.field input:focus-visible {
  border-color: var(--color-accent);
  outline-color: var(--color-focus);
}

.error {
  min-height: 1.5em;
  margin: calc(var(--space-xs) * -1) 0 0;
  color: var(--color-danger);
  font-size: var(--text-sm);
}

button {
  min-height: 3rem;
  border: var(--rule-hair) solid var(--color-accent);
  border-radius: var(--radius-button);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  cursor: pointer;
  font-weight: 700;
  white-space: nowrap;
  transition: background-color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out);
}

button:active { transform: translateY(1px); }

button:disabled,
input:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

form small {
  color: var(--color-muted);
  font-size: var(--text-sm);
  line-height: 1.6;
}

@media (hover: hover) and (pointer: fine) {
  .field input:hover { background: var(--color-paper); }
  button:hover { background: var(--color-accent-strong); }
}

@media (min-width: 48rem) {
  .login-shell { grid-template-columns: minmax(20rem, 0.9fr) minmax(26rem, 1.1fr); }

  .identity {
    min-height: 100dvh;
    padding: clamp(var(--space-lg), 5vw, var(--space-2xl));
  }

  .identity-copy { padding-block-end: 4dvh; }

  .login-panel {
    min-height: 100dvh;
    place-items: center;
    padding: var(--space-lg);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after { transition-duration: 150ms !important; }
}