:root {
  --ink: #1B2A4A;
  --ink-soft: #2E3F63;
  --paper: #F5F6F8;
  --paper-warm: #FBFAF7;
  --pencil: #6B7280;
  --pencil-light: #9AA1AC;
  --red-pen: #C1443C;
  --line: #DDE1E8;
  --focus-ring: rgba(193, 68, 60, 0.35);

  --font-display: 'Zilla Slab', Georgia, serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
}

body:focus-within :focus-visible,
*:focus-visible {
  outline: 2px solid var(--red-pen);
  outline-offset: 2px;
}

.stage {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.1fr auto 1fr;
  align-items: stretch;
}

/* ---------- Panel kiri ---------- */

.intro-panel {
  background: var(--ink);
  color: var(--paper);
  position: relative;
  padding: clamp(2.5rem, 6vw, 5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}

.intro-content {
  max-width: 34rem;
  position: relative;
  z-index: 2;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #B9C2D6;
  display: inline-block;
  margin-bottom: 1.4rem;
}

.intro-panel h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 3.6vw, 3rem);
  line-height: 1.14;
  margin: 0 0 1.3rem;
  letter-spacing: -0.01em;
}

.intro-desc {
  font-size: 1rem;
  line-height: 1.65;
  color: #C7CEDD;
  max-width: 30rem;
  margin: 0;
}

.ruled-lines {
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image: repeating-linear-gradient(
    to bottom,
    transparent,
    transparent 38px,
    rgba(255, 255, 255, 0.045) 39px
  );
  pointer-events: none;
}

.stamp {
  position: absolute;
  bottom: clamp(1.5rem, 4vw, 3rem);
  right: clamp(1.5rem, 4vw, 3rem);
  color: #7C88A6;
  animation: spin 32s linear infinite;
}

@media (prefers-reduced-motion: reduce) {
  .stamp { animation: none; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ---------- Perforasi tengah ---------- */

.perforation {
  width: 1px;
  background-image: repeating-linear-gradient(
    to bottom,
    var(--line) 0,
    var(--line) 6px,
    transparent 6px,
    transparent 14px
  );
  position: relative;
}

@media (max-width: 860px) {
  .perforation { display: none; }
}

/* ---------- Panel kanan / form ---------- */

.auth-panel {
  background: var(--paper-warm);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(2rem, 5vw, 4rem);
}

.auth-card {
  width: 100%;
  max-width: 23rem;
}

.ticket-meta {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--pencil-light);
  margin-bottom: 1.6rem;
}

.role-tabs {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
  margin-bottom: 2rem;
  background: #fff;
}

.role-tab {
  border: none;
  background: transparent;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.55rem 1.15rem;
  border-radius: 999px;
  color: var(--pencil);
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease;
}

.role-tab.active {
  background: var(--ink);
  color: #fff;
}

.field {
  display: block;
  margin-bottom: 1.25rem;
}

.field span {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: 0.4rem;
}

.field input {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.field input:focus {
  border-color: var(--red-pen);
  box-shadow: 0 0 0 4px var(--focus-ring);
}

.error-msg {
  min-height: 1.2em;
  color: var(--red-pen);
  font-size: 0.83rem;
  margin: -0.4rem 0 1rem;
}

.submit-btn {
  width: 100%;
  border: none;
  background: var(--ink);
  color: #fff;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.85rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  position: relative;
  transition: background-color 0.18s ease, transform 0.05s ease;
}

.submit-btn:hover { background: var(--ink-soft); }
.submit-btn:active { transform: translateY(1px); }

.submit-btn span {
  position: relative;
}

.submit-btn span::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  background: var(--red-pen);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.submit-btn:hover span::after { transform: scaleX(1); }

.submit-btn[disabled] {
  opacity: 0.65;
  cursor: not-allowed;
}

.hint {
  margin-top: 1.6rem;
  font-size: 0.78rem;
  color: var(--pencil-light);
  line-height: 1.6;
}

.hint code {
  font-family: var(--font-mono);
  background: #EFEDE7;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  color: var(--ink-soft);
}

@media (max-width: 860px) {
  .stage { grid-template-columns: 1fr; }
  .intro-panel { padding: 2.5rem 1.5rem; min-height: 280px; }
}