/* ============================================================================
   NNGF Northern Shield — authentication (LIGHT, full-screen split).
   Modelled on the NNPC Liquidity Tower access portal: a rich emerald-gradient
   brief panel beside a white sign-in card on a soft light ground.
   Self-hosted fonts (fonts.css). No CDN.
   ========================================================================== */
:root {
  --auth-bg-1: #f5f9f7;
  --auth-bg-2: #e9f4ee;
  --auth-bg-3: #ddeee5;
  --auth-card: rgba(255, 255, 255, 0.9);
  --auth-card-strong: rgba(255, 255, 255, 0.98);
  --auth-border: rgba(47, 157, 104, 0.2);
  --auth-text: #0f2620;
  --auth-ink: #12352a;
  --auth-muted: #4a6a5f;
  --auth-accent: #1f9d63;
  --auth-accent-2: #0b6a3a;
  --auth-gold: #d99a2b;
  --auth-danger: #dc2626;
  --radius-xl: 22px;
  --radius-lg: 14px;
  --display: 'Sora', system-ui, 'Segoe UI', sans-serif;
  --sans: 'Plus Jakarta Sans', system-ui, 'Segoe UI', sans-serif;
  --mono: 'DM Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; min-height: 100%; }

body {
  color: var(--auth-text);
  font-family: var(--sans);
  background:
    radial-gradient(900px 500px at -8% -12%, rgba(47, 157, 104, 0.16) 0%, rgba(47, 157, 104, 0) 62%),
    radial-gradient(760px 430px at 110% -20%, rgba(224, 168, 62, 0.16) 0%, rgba(224, 168, 62, 0) 60%),
    linear-gradient(130deg, var(--auth-bg-1), var(--auth-bg-2) 48%, var(--auth-bg-3));
  position: relative;
  overflow-x: hidden;
}
body::before {
  content: ''; position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: 0.4;
  background-image: linear-gradient(rgba(16, 60, 45, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(16, 60, 45, 0.03) 1px, transparent 1px);
  background-size: 44px 44px;
}
body::after {
  content: ''; position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: 0.5;
  background: radial-gradient(circle at 30% 20%, rgba(47, 157, 104, 0.1), transparent 42%);
  filter: blur(60px);
}
h1, h2, h3 { font-family: var(--display); letter-spacing: -0.01em; margin: 0; }

main.auth-shell { position: relative; z-index: 1; width: 100%; min-height: 100vh; }
.auth-grid { display: grid; grid-template-columns: 1.02fr 0.98fr; align-items: stretch; min-height: 100vh; }
.auth-brief, .auth-form-col { padding: clamp(30px, 4.5vw, 56px); min-width: 0; }

/* ---- Left: emerald-gradient brief ---- */
.auth-brief {
  position: relative; overflow: hidden;
  background: linear-gradient(140deg, #06231b 0%, #0b5c3b 52%, #1f9d63 100%);
  color: #eef5f1;
  display: flex; flex-direction: column; gap: 28px; justify-content: space-between;
}
.auth-brief::after {
  content: ''; position: absolute; right: -140px; bottom: -160px; width: 360px; height: 360px; border-radius: 50%;
  background: radial-gradient(circle, rgba(224, 168, 62, 0.18), transparent 68%); pointer-events: none;
}
.auth-brief > .brief-top { display: flex; flex-direction: column; gap: 16px; position: relative; z-index: 1; }
.brand-row { display: flex; align-items: center; gap: 13px; }
.brand-logo-shell {
  height: 50px; width: 50px; flex-shrink: 0; border-radius: 13px; display: grid; place-items: center;
  background: rgba(255, 255, 255, 0.14); border: 1px solid rgba(255, 255, 255, 0.28);
  backdrop-filter: blur(4px); box-shadow: 0 10px 22px rgba(0, 0, 0, 0.24);
  font-family: var(--display); font-weight: 800; font-size: 13px; letter-spacing: 0.05em; color: #fff;
}
.brand-text { line-height: 1.2; }
.brand-text strong { display: block; font-family: var(--display); font-size: 1.02rem; font-weight: 800; color: #fff; }
.brand-text span { display: block; color: rgba(224, 240, 232, 0.72); font-size: 0.86rem; margin-top: 2px; }
.kicker { font-family: var(--mono); color: #f2ca63; font-size: 0.82rem; letter-spacing: 0.1em; text-transform: uppercase; }
.auth-brief h1 { font-size: clamp(1.75rem, 3.4vw, 2.9rem); line-height: 1.1; font-weight: 800; color: #fff; }
.auth-brief .lead { color: rgba(224, 240, 232, 0.82); line-height: 1.65; max-width: 52ch; }

.tips-panel {
  position: relative; z-index: 1;
  border: 1px solid rgba(224, 168, 62, 0.34); border-radius: var(--radius-xl);
  background: rgba(4, 22, 16, 0.34); padding: 20px; backdrop-filter: blur(6px);
}
.tips-panel h2 { font-size: 1.02rem; font-weight: 700; color: #fff; margin: 0 0 12px; }
.tip-list { margin: 0; padding-left: 20px; display: grid; gap: 10px; color: rgba(224, 240, 232, 0.85); list-style: decimal; }
.tip-list li { line-height: 1.5; font-size: 0.92rem; }
.tip-callout {
  margin-top: 14px; border-radius: var(--radius-lg); padding: 11px 14px; font-size: 0.9rem; line-height: 1.45;
  background: rgba(47, 157, 104, 0.16); border: 1px dashed rgba(120, 220, 170, 0.5); color: #d7f3e5;
}

/* ---- Right: white sign-in card ---- */
.auth-form-col { display: flex; justify-content: center; align-items: center; }
.auth-card {
  width: min(468px, 100%); background: var(--auth-card-strong);
  border: 1px solid var(--auth-border); border-radius: var(--radius-xl);
  padding: clamp(24px, 3vw, 38px); box-shadow: 0 20px 48px rgba(9, 40, 28, 0.1);
}
.auth-card h2 { font-size: clamp(1.4rem, 2.2vw, 1.85rem); font-weight: 800; color: #0f241d; }
.auth-card .subtitle { margin: 8px 0 20px; color: var(--auth-muted); font-size: 0.96rem; }

.alert-error, .alert.error {
  margin: 0 0 14px; border-radius: 10px; padding: 10px 13px; font-size: 0.9rem;
  border: 1px solid rgba(220, 38, 38, 0.3); background: rgba(220, 38, 38, 0.08); color: #8a1c1c;
}

.auth-form { display: block; }
.auth-field { margin-bottom: 15px; }
.auth-field label { display: block; margin-bottom: 8px; font-weight: 600; font-size: 0.9rem; color: #1a3830; }
.auth-field input {
  width: 100%; border-radius: 11px; border: 1px solid rgba(47, 157, 104, 0.26);
  background: rgba(255, 255, 255, 0.96); color: var(--auth-text); padding: 12px 14px; font: inherit; font-size: 1rem;
  transition: border-color 200ms ease, box-shadow 200ms ease, background 200ms ease;
}
.auth-field input::placeholder { color: #9bb0a7; }
.auth-field input:focus {
  outline: none; border-color: var(--auth-accent); background: #fff;
  box-shadow: 0 0 0 3px rgba(47, 157, 104, 0.14);
}
.auth-field input.otp { letter-spacing: 10px; text-align: center; font-family: var(--mono); font-size: 24px; }

.auth-meta {
  margin: 4px 0 14px; display: flex; justify-content: space-between; align-items: center; gap: 8px;
  color: var(--auth-muted); font-size: 0.82rem; flex-wrap: wrap;
}
.auth-btn {
  width: 100%; border: 0; border-radius: 12px; padding: 13px 16px; font: inherit; font-weight: 700; letter-spacing: 0.01em;
  color: #fff; background: linear-gradient(100deg, var(--auth-accent-2), var(--auth-accent)); cursor: pointer;
  font-size: 1rem; box-shadow: 0 6px 16px rgba(11, 106, 58, 0.32); transition: transform 180ms ease, filter 180ms ease, box-shadow 180ms ease;
  font-family: var(--sans);
}
.auth-btn:hover { filter: brightness(1.07); transform: translateY(-1px); box-shadow: 0 9px 22px rgba(11, 106, 58, 0.42); }
.auth-btn:active { transform: translateY(0); }
.form-note { margin-top: 12px; color: var(--auth-muted); text-align: center; font-size: 0.82rem; line-height: 1.4; }

.linkbtn { background: none; border: none; color: var(--auth-accent-2); cursor: pointer; font-size: 0.86rem; font-weight: 600; font-family: var(--sans); text-decoration: none; border-bottom: 1px dashed rgba(11, 106, 58, 0.4); }
.linkbtn:hover { color: var(--auth-accent); border-color: rgba(47, 157, 104, 0.9); }
.inline-center { display: block; text-align: center; margin-top: 16px; }

@media (max-width: 1040px) {
  .auth-grid { grid-template-columns: 1fr; height: auto; min-height: 100vh; }
  main.auth-shell { height: auto; min-height: 100vh; }
  .auth-brief { order: 2; }
  .auth-form-col { order: 1; }
}
@media (max-width: 720px) {
  .auth-brief, .auth-form-col { padding: 30px 20px; }
  .auth-meta { flex-direction: column; align-items: flex-start; }
}