* { box-sizing: border-box; }
html { background: var(--canvas); scroll-padding-block: 16px; }
body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 30px;
  background: var(--canvas);
  color: var(--ink);
  font: 15px/1.6 "Segoe UI", system-ui, sans-serif;
}
main {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  flex: 0 0 auto;
  width: min(940px, 100%);
  min-width: 0;
  margin-block: auto;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.welcome, .panel { min-width: 0; }
.welcome {
  padding: 44px 28px;
  border-radius: 23px 0 0 23px;
  background: var(--chrome-gradient);
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.bird { display: block; width: min(290px, 100%); height: auto; }
.wordmark { font: 44px Georgia, serif; letter-spacing: 5px; margin: 20px 0 0; }
.welcome > p:last-child { color: var(--muted); font-size: 13px; }
.panel { padding: 40px; }
.sprig { display: block; width: 150px; height: 50px; object-fit: contain; }
h1 { font: 30px/1.2 Georgia, serif; margin: 12px 0; overflow-wrap: anywhere; }
p { margin: 0 0 18px; }
#intro, small { color: var(--muted); }
label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; font-weight: 600; margin-bottom: 18px; }
input {
  display: block;
  width: 100%;
  min-width: 0;
  min-height: 48px;
  /* 16px prevents automatic input zoom on iPhone without disabling user zoom. */
  font: 400 16px/1.4 "Segoe UI", system-ui, sans-serif;
  padding: 11px 12px;
  border-radius: 9px;
  border: 1px solid var(--strong-border);
  background: var(--surface);
  color: var(--ink);
  scroll-margin-block: 16px;
}
button {
  border: 0;
  border-radius: 9px;
  min-height: 48px;
  width: 100%;
  padding: 12px;
  background: var(--primary);
  color: var(--primary-ink);
  font: 600 14px/1.4 "Segoe UI", system-ui, sans-serif;
  cursor: pointer;
  scroll-margin-block: 16px;
}
button:disabled { opacity: .6; cursor: wait; }
input:focus-visible, button:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
small { display: block; margin-top: 22px; font-size: 12px; }
#error { color: var(--error); font-size: 13px; overflow-wrap: anywhere; }
#error:empty { display: none; }
[hidden] { display: none !important; }
.sign-in-link { margin: 12px 0 0; font-size: 12px; }
.sign-in-link a { color: var(--primary); display: inline-flex; align-items: center; min-height: 44px; }

@media (max-width: 700px) {
  body {
    padding: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right))
      max(12px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
    font-size: 14px;
    line-height: 1.45;
  }
  main { grid-template-columns: minmax(0, 1fr); max-width: 440px; border-radius: 20px; }
  .welcome { padding: 12px 16px; border-radius: 19px 19px 0 0; flex-direction: row; gap: 10px; }
  .bird { flex: 0 0 auto; width: 54px; height: 64px; object-fit: contain; }
  .wordmark { font-size: clamp(22px, 6.5vw, 30px); letter-spacing: 3px; margin: 0; }
  .welcome > p:last-child { display: none; }
  .panel { padding: 18px 20px 20px; }
  .sprig { width: 112px; height: 32px; }
  h1 { font-size: clamp(24px, 6vw, 28px); margin: 8px 0 10px; }
  #intro { margin-bottom: 18px; }
  label { gap: 5px; margin-bottom: 14px; }
  small { margin-top: 16px; line-height: 1.45; }
  .sign-in-link { margin-top: 6px; }
}

/* Auto margins collapse on short screens, keeping the top of the form reachable.
   Content remains scrollable above an on-screen keyboard. */
@media (max-width: 700px) and (max-height: 700px) {
  body { padding-top: max(8px, env(safe-area-inset-top)); padding-bottom: max(8px, env(safe-area-inset-bottom)); }
  .welcome { padding-block: 4px; }
  .bird { width: 38px; height: 40px; }
  .panel { padding: 12px 18px 14px; }
  .sprig { display: none; }
  h1 { font-size: 22px; margin: 0 0 8px; }
  #intro { margin-bottom: 10px; }
  label { gap: 4px; margin-bottom: 10px; }
  small { margin-top: 8px; }
}