:root {
  --bg: #0a0a0a;
  --panel: #161616;
  --panel-2: #1d1d1d;
  --border: #2a2a2a;
  --border-strong: #3a3a3a;
  --text: #ececec;
  --dim: #888;
  --faint: #555;
  --brand: #f0772e;
  --brand-glow: rgba(240, 119, 46, 0.4);
  --green: #30d158;
  --red: #ff3b30;
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0; height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  overflow: hidden;
}
.bg-glow {
  position: fixed; inset: 0;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(240, 119, 46, 0.15), transparent 55%),
    radial-gradient(ellipse at 80% 80%, rgba(255, 59, 48, 0.10), transparent 55%);
  pointer-events: none;
}
.login-shell {
  position: relative;
  height: 100%;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 36px 28px;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.04) inset,
    0 24px 80px rgba(0, 0, 0, 0.7),
    0 0 0 1px rgba(240, 119, 46, 0.08);
  display: flex; flex-direction: column;
  animation: card-in 0.4s ease-out;
}
@keyframes card-in {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
.login-card.shake { animation: shake 0.4s; }
@keyframes shake {
  0%,100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-5px); }
  80% { transform: translateX(5px); }
}

.login-head {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 28px;
}
.logo {
  width: 44px; height: 44px;
  border-radius: 9px;
  box-shadow: 0 0 0 1px var(--border-strong), 0 4px 14px var(--brand-glow);
}
.brand {
  font-size: 16px; font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--brand);
  line-height: 1;
}
.sub {
  font-size: 11px; color: var(--dim);
  letter-spacing: 0.5px;
  margin-top: 4px;
}
.login-card h1 {
  margin: 0 0 6px;
  font-size: 24px; font-weight: 700;
  letter-spacing: -0.3px;
}
.lead {
  margin: 0 0 24px;
  font-size: 13px; color: var(--dim);
  line-height: 1.5;
}

.field {
  display: flex; flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}
.field span {
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--dim);
  font-weight: 600;
}
.field input {
  background: var(--panel-2);
  border: 1px solid var(--border-strong);
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  padding: 12px 14px;
  border-radius: 8px;
  outline: none;
  transition: all 0.15s;
}
.field input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(240, 119, 46, 0.15);
  background: #1f1f1f;
}
.field input::placeholder { color: var(--faint); }

.error {
  min-height: 18px;
  font-size: 12px;
  color: var(--red);
  letter-spacing: 0.3px;
  margin: 6px 0 4px;
  font-weight: 500;
}

.btn-submit {
  margin-top: 14px;
  background: linear-gradient(135deg, #f0772e 0%, #d65a14 100%);
  color: #fff;
  border: none;
  border-radius: 9px;
  padding: 13px 18px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.18s;
  box-shadow: 0 6px 20px rgba(240, 119, 46, 0.32);
  position: relative;
  overflow: hidden;
}
.btn-submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 28px rgba(240, 119, 46, 0.5);
}
.btn-submit:active { transform: translateY(0); }
.btn-submit:disabled { cursor: not-allowed; opacity: 0.85; }

.btn-spinner {
  display: none;
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-left: 8px;
}
.btn-submit.loading .btn-label { opacity: 0.7; }
.btn-submit.loading .btn-spinner { display: inline-block; vertical-align: middle; }
@keyframes spin { to { transform: rotate(360deg); } }

.login-foot {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--faint);
  display: flex; align-items: center; gap: 8px;
  letter-spacing: 0.5px;
}
.login-foot .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; }
  50% { opacity: 0.4; }
}