@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=Instrument+Serif:ital@0;1&display=swap');

:root {
  --navy: #001a4d;
  --navy-mid: #0a2a5c;
  --gold: #c4840a;
  --gold-soft: #e8b84a;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #dbe3ee;
  --panel: #f7f9fc;
  --error: #9f1239;
  --error-bg: #fff1f2;
  --ok: #14532d;
}

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

html, body { height: 100%; }

body {
  font-family: 'DM Sans', system-ui, sans-serif;
  color: var(--ink);
  background: var(--panel);
  -webkit-font-smoothing: antialiased;
}

.login-shell {
  min-height: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
}

.login-visual {
  position: relative;
  min-height: 100vh;
  background:
    radial-gradient(ellipse 70% 50% at 80% 80%, rgba(30, 78, 121, 0.45), transparent 50%),
    linear-gradient(155deg, #001238 0%, #002060 42%, #0c3a6e 100%);
  overflow: hidden;
}

.login-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
  animation: gridDrift 28s linear infinite;
}

@keyframes gridDrift {
  from { transform: translate(0, 0); }
  to { transform: translate(48px, 48px); }
}

.visual-veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(0, 18, 56, 0.75) 100%);
}

.visual-logo {
  position: absolute;
  z-index: 1;
  top: 47%;
  left: 46%;
  width: clamp(220px, 30vw, 340px);
  height: auto;
  aspect-ratio: 1;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  transform: translate(-50%, -50%);
  animation: logoFade 0.7s ease both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes logoFade {
  from { opacity: 0; transform: translate(-50%, calc(-50% + 14px)); }
  to { opacity: 1; transform: translate(-50%, -50%); }
}

.login-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 28px;
  background:
    linear-gradient(180deg, #ffffff 0%, #f4f7fb 100%);
}

.panel-inner {
  width: 100%;
  max-width: 380px;
  animation: fadeUp 0.65s 0.12s ease both;
}

.panel-header h1 {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 2.35rem;
  font-weight: 400;
  color: var(--navy);
  letter-spacing: -0.02em;
}

.panel-header p {
  margin-top: 8px;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.5;
}

.login-form {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.field label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 7px;
}

.field input {
  width: 100%;
  height: 46px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  font: inherit;
  font-size: 0.95rem;
  color: var(--ink);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.field input:hover { border-color: #b8c5d6; }

.field input:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(196, 132, 10, 0.18);
}

.password-wrap {
  position: relative;
}

.password-wrap input { padding-right: 68px; }

.toggle-pw {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 8px 10px;
  cursor: pointer;
  border-radius: 6px;
}

.toggle-pw:hover { color: var(--navy); background: #eef2f7; }

.form-error {
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--error-bg);
  color: var(--error);
  font-size: 0.85rem;
  line-height: 1.4;
  border: 1px solid #fecdd3;
}

.submit-btn {
  margin-top: 6px;
  height: 48px;
  border: none;
  border-radius: 8px;
  background: linear-gradient(180deg, #0a3570 0%, var(--navy) 100%);
  color: #fff;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: transform 0.12s, box-shadow 0.15s, filter 0.15s;
  box-shadow: 0 8px 20px rgba(0, 32, 96, 0.28);
}

.submit-btn:hover:not(:disabled) {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

.submit-btn:active:not(:disabled) { transform: translateY(0); }

.submit-btn:disabled {
  opacity: 0.72;
  cursor: wait;
}

.btn-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.field-hint {
  margin-top: 6px;
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.35;
}

.auth-switch {
  margin-top: 22px;
  text-align: center;
  font-size: 0.88rem;
  color: var(--muted);
}

.auth-switch a {
  color: var(--navy);
  font-weight: 600;
  text-decoration: none;
  margin-left: 4px;
}

.auth-switch a:hover {
  color: var(--gold);
  text-decoration: underline;
}

.panel-foot {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.panel-foot p {
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.45;
}

@media (max-width: 860px) {
  .login-shell {
    grid-template-columns: 1fr;
  }

  .login-visual {
    min-height: 260px;
  }

  .visual-logo {
    width: 112px;
  }
}

.field input:focus-visible,
.toggle-pw:focus-visible,
.submit-btn:focus-visible,
.auth-switch a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.login-panel {
  position: relative;
}

.login-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--navy) 0%, var(--gold) 55%, var(--gold-soft) 100%);
  opacity: 0.9;
}

.field input:user-invalid:not(:placeholder-shown) {
  border-color: #fda4af;
}

@media (max-width: 480px) {
  .login-panel {
    padding: 24px 18px 32px;
  }

  .panel-header h1 {
    font-size: 2rem;
  }

  .login-form {
    margin-top: 24px;
    gap: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}