:root {
  --bg: #14121f;
  --bg-deep: #0d0b16;
  --surface: #1f1b2e;
  --surface-2: #262137;
  --amber: #f2a154;
  --amber-soft: #f2a15433;
  --violet: #8b8fff;
  --text: #f5f1e8;
  --text-muted: #9891ab;
  --border: #33304a;
  --danger: #ff8080;
  --ok: #8fe3a8;
  --radius: 18px;
  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(ellipse at 30% 20%, #201a35 0%, var(--bg) 45%, var(--bg-deep) 100%);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------------- Fireflies (single ambient motion) ---------------- */
.fireflies {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.firefly {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 8px 2px var(--amber-soft);
  opacity: 0;
  animation-name: drift, glow;
  animation-timing-function: ease-in-out;
  animation-iteration-count: infinite;
}

@keyframes drift {
  0%   { transform: translate(0, 0); }
  50%  { transform: translate(var(--dx), var(--dy)); }
  100% { transform: translate(0, 0); }
}

@keyframes glow {
  0%, 100% { opacity: 0; }
  50% { opacity: var(--peak, 0.8); }
}

/* ---------------- Layout ---------------- */
.stage {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 400px;
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px 32px;
  box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.6);
  animation: rise 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.card-head { margin-bottom: 24px; }

.dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 6px 1px var(--ok);
  margin-bottom: 12px;
}

.card h1 {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}

.subtitle {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
}

/* ---------------- Tabs ---------------- */
.tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 4px;
  margin-bottom: 22px;
}

.tab {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  padding: 9px 0;
  border-radius: 9px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.tab.active {
  background: var(--surface-2);
  color: var(--text);
}

.tab:focus-visible,
input:focus-visible,
button:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 2px;
}

/* ---------------- Forms ---------------- */
.panel {
  display: none;
  flex-direction: column;
  gap: 16px;
}

.panel.active {
  display: flex;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
}

input {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 13px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  transition: border-color 0.2s ease;
}

input:focus {
  border-color: var(--amber);
}

.hint {
  margin: -8px 0 0;
  font-size: 12px;
  color: var(--text-muted);
}

.btn-primary {
  margin-top: 4px;
  border: none;
  border-radius: 10px;
  padding: 12px 0;
  background: linear-gradient(180deg, var(--amber) 0%, #d9843f 100%);
  color: #1a1206;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary:hover {
  box-shadow: 0 8px 20px -6px var(--amber-soft);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: default;
  transform: none;
  box-shadow: none;
}

.msg {
  min-height: 18px;
  margin: 0;
  font-size: 13px;
}

.msg.error { color: var(--danger); }
.msg.ok { color: var(--ok); }

.panel.shake { animation: shake 0.4s ease; }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

@media (prefers-reduced-motion: reduce) {
  .card { animation: none; }
  .firefly { animation: none; opacity: 0.3; }
  .panel.shake { animation: none; }
}