/* Login / signup — shared layout. Assumes design-system.css is loaded.
   Structural inspiration: minimal card, underlined inputs, pill buttons,
   top-right "return to site" link, small footer credit. */

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-sans); background: var(--bg); color: var(--ink);
  min-height: 100vh; padding: 32px;
}
a { color: inherit; }

.auth-topbar { display: flex; justify-content: flex-end; }
.auth-return {
  display: inline-flex; align-items: center; font-size: 12.5px; font-weight: 600;
  color: var(--ink-soft); border: var(--border); border-radius: 999px;
  padding: 9px 18px; text-decoration: none; font-family: var(--font-sans);
}
.auth-return:hover { border-color: var(--line-strong); color: var(--ink); }

.auth-center { min-height: calc(100vh - 100px); display: flex; align-items: center; justify-content: center; }
.auth-wrap { width: 100%; max-width: 440px; }
.auth-brand { display: flex; align-items: center; justify-content: center; gap: 10px; margin-bottom: 36px; }
.auth-brand img { height: 28px; width: 28px; object-fit: contain; mix-blend-mode: multiply; }
.auth-brand span { font-family: var(--font-sans); font-weight: 600; font-size: 14px; letter-spacing: .3em; text-transform: uppercase; }

.auth-card { padding: 44px 40px; }
.auth-card h1 { font-family: var(--font-serif); font-size: 32px; font-weight: 500; letter-spacing: -0.01em; margin-bottom: 8px; }
.auth-card .lead { color: var(--ink-soft); font-size: 14.5px; margin-bottom: 32px; }

.auth-form { display: flex; flex-direction: column; gap: 22px; }
.auth-field { position: relative; }
.auth-field label {
  display: block; font-size: 13px; color: var(--ink-faint); margin-bottom: 8px; font-family: var(--font-sans);
}
.auth-field input {
  width: 100%; background: none; border: none; border-bottom: var(--border);
  border-radius: 0; padding: 4px 0 10px; font-size: 15px; font-family: var(--font-sans); color: var(--ink); outline: none;
}
.auth-field input:focus { border-bottom-color: var(--accent); }
.auth-field input::placeholder { color: var(--ink-faint); }

.auth-error {
  background: var(--err-bg); color: var(--err); border-radius: var(--radius-sm);
  padding: 10px 14px; font-size: 13px; font-weight: 500;
}

.auth-actions { display: flex; align-items: center; gap: 10px; margin-top: 6px; flex-wrap: wrap; }
.auth-pill {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-sans); font-weight: 600; font-size: 13.5px;
  border-radius: 999px; padding: 13px 26px; cursor: pointer; border: none;
  text-decoration: none;
}
.auth-pill-primary { background: var(--ink); color: var(--bg); }
.auth-pill-primary:hover { opacity: .85; }
.auth-pill-ghost { background: none; color: var(--ink); border: var(--border); }
.auth-pill-ghost:hover { border-color: var(--line-strong); }

.auth-switch { margin-top: 28px; font-size: 13px; color: var(--ink-soft); }
.auth-switch a { color: var(--accent); font-weight: 600; text-decoration: none; }
.auth-switch a:hover { text-decoration: underline; }

.auth-footer {
  text-align: center; margin-top: 22px; font-size: 11.5px; color: var(--ink-faint);
  font-family: var(--font-mono); letter-spacing: .02em;
}
.auth-footer a { color: var(--ink-faint); text-decoration: none; }
.auth-footer a:hover { color: var(--ink-soft); }