:root {
  --off-white: #f4f5f7;
  --near-black: #121417;
  --mid-grey: #7d8690;
  --dark-slate: #3a3f45;
  --blue-grey: #a5bdcc;
  --bg: var(--near-black);
  --ink: var(--off-white);
  --muted: var(--mid-grey);
  --line: var(--dark-slate);
  --accent: var(--blue-grey);
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-family: var(--sans);
  color-scheme: dark;
}

* { box-sizing: border-box; }
button, input { font: inherit; border-radius: 0; }

.login-page {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(820px 520px at 50% 112%, rgba(165, 189, 204, 0.14), transparent 64%),
    var(--bg);
  color: var(--ink);
}

/* A faint hairline field, echoing the grid rules used across the studio. */
.login-grain {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    linear-gradient(to right, rgba(58, 63, 69, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(58, 63, 69, 0.55) 1px, transparent 1px);
  background-size: 96px 96px;
  mask-image: radial-gradient(circle at 50% 45%, #000 10%, transparent 72%);
  -webkit-mask-image: radial-gradient(circle at 50% 45%, #000 10%, transparent 72%);
}

.login-shell {
  position: relative;
  z-index: 1;
  width: min(560px, 100%);
  border: 1px solid var(--line);
  background: rgba(18, 20, 23, 0.86);
  box-shadow: 0 24px 70px rgba(18, 20, 23, 0.6);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.login-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 26px;
  border-bottom: 1px solid var(--line);
}

.login-brand { display: inline-flex; align-items: center; gap: 10px; }
.login-wave { height: 15px; color: var(--accent); }
.login-wordmark { font-size: 15px; font-weight: 650; letter-spacing: -0.01em; }

.login-badge {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 4px 9px;
  white-space: nowrap;
}

.login-form {
  display: grid;
  gap: 16px;
  padding: 34px 26px 30px;
}

.login-heading { display: grid; gap: 8px; margin-bottom: 6px; }

.eyebrow {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow::before { content: "// "; color: var(--accent); }

.login-heading h1 {
  margin: 0;
  padding-bottom: 12px;
  position: relative;
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 650;
  line-height: 1.05;
  letter-spacing: -0.8px;
}
.login-heading h1::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 34px;
  height: 2px;
  background: var(--accent);
}

.login-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.login-error {
  margin: 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.5;
  color: var(--ink);
}

.login-form label {
  display: grid;
  gap: 7px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
}

.login-form input {
  width: 100%;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 11px 12px;
  font-family: var(--sans);
  font-size: 14px;
  text-transform: none;
  letter-spacing: normal;
  transition: border-color 0.15s;
}
.login-form input:focus {
  outline: 1px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

.login-form button[type="submit"] {
  margin-top: 6px;
  padding: 13px 18px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--near-black);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity 0.15s;
}
.login-form button[type="submit"]:hover:not(:disabled) { opacity: 0.86; }
.login-form button[type="submit"]:disabled { opacity: 0.5; cursor: wait; }

.login-foot {
  padding: 14px 26px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
}

@media (max-width: 560px) {
  .login-page { align-items: flex-start; padding: 16px; }
  .login-topbar, .login-form, .login-foot { padding-left: 18px; padding-right: 18px; }
  .login-form { padding-top: 26px; }
  /* iOS zooms a focused control below 16px. */
  .login-form input { font-size: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  .login-form input, .login-form button[type="submit"] { transition: none; }
}