/*
 * ARGUS sign-in page.
 *
 * Dark void with a centered Argus eye that pulses + slowly orbits its rings,
 * a single password field with a glowing burnt-orange focus ring, and an
 * ENTER button that fills with glow on hover. Designed to feel like booting
 * up a watchful machine.
 */

:root {
  --bg-deep: #06060a;
  --bg-mist: #0e0e16;
  --orange-1: #ff6b1a;
  --orange-2: #e85a14;
  --orange-3: #ffa64d;
  --glow: rgba(255, 107, 26, 0.55);
  --glow-soft: rgba(255, 107, 26, 0.18);
  --glow-faint: rgba(255, 107, 26, 0.08);
  --text-1: #f5f1e8;
  --text-2: #a89e8e;
  --text-3: #6b6354;
  --red: #ff4757;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  background: var(--bg-deep);
  color: var(--text-1);
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  font-size: 14px;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

.vignette {
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at center,
    transparent 0%, transparent 50%, rgba(0,0,0,0.6) 100%);
  pointer-events: none;
  z-index: 1;
}

.ambient-glow {
  position: fixed;
  top: 50%;
  left: 50%;
  width: 800px;
  height: 800px;
  margin-top: -400px;
  margin-left: -400px;
  background: radial-gradient(circle, var(--glow-faint) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
  animation: ambient-breathe 8s ease-in-out infinite;
}

@keyframes ambient-breathe {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50%      { opacity: 1.0; transform: scale(1.08); }
}

.signin {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px;
  width: 100%;
  max-width: 480px;
  text-align: center;
}

/* ── Argus Eye ──────────────────────────────────────────── */

.argus-eye {
  position: relative;
  width: 180px;
  height: 180px;
  margin-bottom: 32px;
}

.argus-eye .iris {
  position: absolute;
  inset: 30px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%,
    var(--orange-3) 0%, var(--orange-1) 35%, var(--orange-2) 70%, #4a1f08 100%);
  box-shadow:
    0 0 60px var(--glow),
    0 0 120px var(--glow-soft),
    inset 0 0 30px rgba(0,0,0,0.5);
  animation: iris-pulse 4s ease-in-out infinite;
}

.argus-eye .pupil {
  position: absolute;
  inset: 70px;
  border-radius: 50%;
  background: #06060a;
  box-shadow: inset 0 0 20px rgba(255,107,26,0.4);
  animation: pupil-pulse 4s ease-in-out infinite;
}

.argus-eye .ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--glow-soft);
  pointer-events: none;
}
.argus-eye .outer-ring {
  inset: -10px;
  border-color: var(--glow-faint);
  animation: ring-spin 30s linear infinite;
}
.argus-eye .middle-ring {
  inset: 5px;
  border-color: var(--glow-soft);
  border-style: dashed;
  animation: ring-spin 18s linear infinite reverse;
}
.argus-eye .inner-ring {
  inset: 18px;
  border-color: var(--glow);
  animation: ring-spin 12s linear infinite;
}

@keyframes iris-pulse {
  0%, 100% { box-shadow: 0 0 60px var(--glow), 0 0 120px var(--glow-soft), inset 0 0 30px rgba(0,0,0,0.5); }
  50%      { box-shadow: 0 0 90px var(--glow), 0 0 180px var(--glow), inset 0 0 30px rgba(0,0,0,0.5); }
}
@keyframes pupil-pulse {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(0.85); }
}
@keyframes ring-spin {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ── Brand text ─────────────────────────────────────────── */

.brand {
  font-family: 'Cinzel', serif;
  font-size: 48px;
  font-weight: 700;
  letter-spacing: 0.4em;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--orange-3) 0%, var(--orange-1) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 30px var(--glow-soft);
}

.tagline {
  color: var(--text-2);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 48px;
}

/* ── Form ───────────────────────────────────────────────── */

#signin-form {
  width: 100%;
  margin-bottom: 24px;
}

.field {
  display: flex;
  align-items: stretch;
  background: var(--bg-mist);
  border: 1px solid var(--glow-soft);
  border-radius: 8px;
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field:focus-within {
  border-color: var(--orange-1);
  box-shadow: 0 0 0 4px var(--glow-faint), 0 0 30px var(--glow-soft);
}

#password {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  padding: 18px 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px;
  color: var(--text-1);
  letter-spacing: 0.1em;
}

#password::placeholder {
  color: var(--text-3);
  letter-spacing: 0.1em;
}

#enter-btn {
  background: linear-gradient(135deg, var(--orange-2) 0%, var(--orange-1) 100%);
  border: none;
  color: #1a1208;
  padding: 0 28px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: filter 0.2s ease, box-shadow 0.2s ease;
}

#enter-btn:hover {
  filter: brightness(1.15);
  box-shadow: 0 0 30px var(--glow), inset 0 0 20px rgba(255,255,255,0.15);
}

#enter-btn:active {
  filter: brightness(0.9);
}

.btn-arrow {
  font-size: 18px;
  transition: transform 0.2s ease;
}

#enter-btn:hover .btn-arrow {
  transform: translateX(4px);
}

.error {
  color: var(--red);
  font-size: 12px;
  margin-top: 12px;
  letter-spacing: 0.05em;
  text-align: left;
  padding-left: 4px;
  animation: error-shake 0.4s ease;
}

@keyframes error-shake {
  0%, 100% { transform: translateX(0); }
  25%      { transform: translateX(-4px); }
  75%      { transform: translateX(4px); }
}

.hint {
  color: var(--text-3);
  font-size: 11px;
  letter-spacing: 0.05em;
}

.hint code {
  color: var(--orange-3);
  background: var(--glow-faint);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ── Footer ─────────────────────────────────────────────── */

.signin-footer {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  color: var(--text-3);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  z-index: 2;
}

/* ── Locked state when wrong ────────────────────────────── */

.signin.locked .argus-eye .iris {
  animation: iris-angry 0.6s ease;
}

@keyframes iris-angry {
  0%, 100% { background: radial-gradient(circle at 35% 35%, var(--orange-3) 0%, var(--orange-1) 35%, var(--orange-2) 70%, #4a1f08 100%); }
  50%      { background: radial-gradient(circle at 35% 35%, #ff8a8a 0%, var(--red) 50%, #4a0808 100%); }
}

/* ── Mobile ─────────────────────────────────────────────── */

@media (max-width: 500px) {
  .argus-eye { width: 140px; height: 140px; margin-bottom: 24px; }
  .argus-eye .iris   { inset: 24px; }
  .argus-eye .pupil  { inset: 56px; }
  .brand { font-size: 36px; letter-spacing: 0.3em; }
  .tagline { margin-bottom: 32px; font-size: 10px; }
  #password { font-size: 14px; padding: 16px; }
  #enter-btn { padding: 0 18px; font-size: 11px; }
  .btn-label { display: none; }
}