:root {
  /* Oreo / Material You inspired palette */
  --bg: #0f0f12;
  --bg-2: #17171c;
  --surface: #1d1d25;
  --surface-hi: #262630;
  --surface-glass: rgba(38, 38, 48, 0.6);
  --border: rgba(255, 255, 255, 0.08);
  --border-hi: rgba(255, 255, 255, 0.14);

  --text: #f2f2f7;
  --text-dim: #a8a8b8;
  --text-hint: #6c6c80;

  --primary: #c8b6ff;       /* Oreo-ish lavender */
  --primary-hi: #d8c9ff;
  --primary-ink: #1a0f3d;
  --accent: #9dffbe;
  --hot: #ff8fa3;
  --warn: #ffd89c;
  --sky: #8ec5ff;

  --radius-sm: 12px;
  --radius: 20px;
  --radius-lg: 28px;
  --radius-xl: 36px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.45);

  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'Geist', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  min-height: 100vh;
  padding: 24px 16px 60px;
  position: relative;
  overflow-x: hidden;
  font-feature-settings: "ss01", "cv11";
}

/* Ambient background blobs */
.bg-blobs {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.35;
  animation: float 20s ease-in-out infinite;
}

.blob-1 {
  background: var(--primary);
  width: 500px; height: 500px;
  top: -150px; left: -100px;
  animation-delay: 0s;
}

.blob-2 {
  background: var(--sky);
  width: 400px; height: 400px;
  bottom: -100px; right: -80px;
  animation-delay: -7s;
  opacity: 0.25;
}

.blob-3 {
  background: var(--accent);
  width: 300px; height: 300px;
  top: 40%; right: 20%;
  animation-delay: -14s;
  opacity: 0.15;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(40px, -30px) scale(1.1); }
  66% { transform: translate(-30px, 40px) scale(0.95); }
}

.app {
  max-width: 560px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
  animation: appear 0.7s var(--ease-spring);
}

@keyframes appear {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Top bar */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 4px;
  margin-bottom: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.logo-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 20px var(--primary), inset 0 -4px 0 rgba(0, 0, 0, 0.2);
  animation: glow-pulse 3s ease-in-out infinite;
}

@keyframes glow-pulse {
  0%, 100% { box-shadow: 0 0 20px var(--primary), inset 0 -4px 0 rgba(0, 0, 0, 0.2); }
  50% { box-shadow: 0 0 32px var(--primary), inset 0 -4px 0 rgba(0, 0, 0, 0.2); }
}

.pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--surface-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

.pulse {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.7; }
}

/* Tabs */
.tabs {
  position: relative;
  display: flex;
  gap: 4px;
  padding: 6px;
  background: var(--surface-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 100px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.tab {
  flex: 1;
  background: transparent;
  border: none;
  padding: 12px 14px;
  border-radius: 100px;
  color: var(--text-dim);
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  transition: color 0.3s var(--ease-out), transform 0.3s var(--ease-spring);
  position: relative;
  z-index: 2;
  white-space: nowrap;
}

.tab:hover { color: var(--text); }

.tab.active {
  color: var(--primary-ink);
  font-weight: 600;
}

.tab svg {
  transition: transform 0.4s var(--ease-spring);
  flex-shrink: 0;
}

.tab.active svg { transform: scale(1.1); }

.tab-indicator {
  position: absolute;
  top: 6px;
  left: 6px;
  height: calc(100% - 12px);
  background: var(--primary);
  border-radius: 100px;
  transition: all 0.5s var(--ease-spring);
  z-index: 1;
  box-shadow: 0 4px 16px rgba(200, 182, 255, 0.4);
}

/* Tab panels */
.tab-panels { position: relative; }

.tab-panel {
  display: none;
  animation: panelIn 0.5s var(--ease-spring);
}

.tab-panel.active { display: block; }

@keyframes panelIn {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-hi), transparent);
}

/* Step cards */
.step {
  animation: stepIn 0.55s var(--ease-spring);
}

@keyframes stepIn {
  from { opacity: 0; transform: translateY(16px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.step-head {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.step-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--primary-ink);
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(200, 182, 255, 0.3);
}

.step-head h2 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-bottom: 4px;
  line-height: 1.25;
}

.step-head p {
  font-size: 13.5px;
  color: var(--text-dim);
  line-height: 1.5;
}

/* Floating-label input */
.input-wrap {
  position: relative;
  margin-bottom: 16px;
}

.input-wrap input {
  width: 100%;
  padding: 26px 18px 14px;
  background: var(--bg-2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: inherit;
  font-size: 17px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  transition: border-color 0.2s, background 0.2s;
}

.input-wrap input::placeholder {
  color: transparent;
  transition: color 0.2s;
}

.input-wrap input:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--bg);
  box-shadow: 0 0 0 4px rgba(200, 182, 255, 0.15);
}

.input-wrap input:focus::placeholder {
  color: var(--text-hint);
}

.floating {
  position: absolute;
  top: 18px;
  left: 20px;
  font-size: 15px;
  color: var(--text-hint);
  pointer-events: none;
  transition: all 0.25s var(--ease-spring);
  font-weight: 500;
}

.input-wrap input:focus + .floating,
.input-wrap input:not(:placeholder-shown) + .floating {
  top: 8px;
  font-size: 11px;
  color: var(--primary);
  letter-spacing: 0.02em;
}

/* Buttons */
.btn {
  width: 100%;
  padding: 16px 22px;
  border: none;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: transform 0.25s var(--ease-spring),
              background 0.2s,
              box-shadow 0.25s;
  letter-spacing: -0.005em;
}

.btn.primary {
  background: var(--primary);
  color: var(--primary-ink);
  box-shadow: 0 8px 24px rgba(200, 182, 255, 0.35),
              inset 0 -3px 0 rgba(0, 0, 0, 0.08);
}

.btn.primary:hover:not(:disabled) {
  background: var(--primary-hi);
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(200, 182, 255, 0.45),
              inset 0 -3px 0 rgba(0, 0, 0, 0.08);
}

.btn.primary:active:not(:disabled) {
  transform: translateY(0) scale(0.98);
}

.btn.ghost {
  background: var(--surface-hi);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn.ghost:hover:not(:disabled) {
  background: var(--surface-glass);
  border-color: var(--border-hi);
  transform: translateY(-2px);
}

.btn.ghost:active:not(:disabled) {
  transform: translateY(0) scale(0.98);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none !important;
}

.btn-arrow {
  transition: transform 0.3s var(--ease-spring);
}

.btn.primary:hover .btn-arrow { transform: translateX(4px); }

.btn-row {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 10px;
}

.btn.full { max-width: 260px; margin: 0 auto; }

/* Play (anchor) button on done screen */
a.btn {
  text-decoration: none;
  max-width: 260px;
  margin: 0 auto 10px;
}

.btn.play svg {
  transition: transform 0.3s var(--ease-spring);
}

.btn.play:hover svg { transform: scale(1.15); }

/* Toast / status */
.toast {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  line-height: 1.5;
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  padding-top: 0;
  padding-bottom: 0;
  margin-top: 0;
  border-width: 0;
  transition: all 0.35s var(--ease-spring);
}

.toast.visible {
  max-height: 200px;
  opacity: 1;
  padding: 14px 16px;
  margin-top: 14px;
  border-width: 1px;
}

.toast.error { border-color: rgba(255, 143, 163, 0.4); color: var(--hot); background: rgba(255, 143, 163, 0.08); }
.toast.success { border-color: rgba(157, 255, 190, 0.4); color: var(--accent); background: rgba(157, 255, 190, 0.08); }
.toast.info { border-color: rgba(255, 216, 156, 0.4); color: var(--warn); background: rgba(255, 216, 156, 0.08); }

/* Profile card */
.profile {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 20px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 20px;
  animation: profileIn 0.5s var(--ease-spring);
}

@keyframes profileIn {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.avatar-ring {
  padding: 3px;
  background: linear-gradient(135deg, var(--primary), var(--sky), var(--accent));
  border-radius: 50%;
  flex-shrink: 0;
  animation: spin 8s linear infinite;
}

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

.avatar-wrap {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--surface-hi);
  overflow: hidden;
  position: relative;
  animation: spin-reverse 8s linear infinite;
}

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

.avatar-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
}

.avatar-wrap img.loaded { opacity: 1; }

.avatar-skeleton {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--surface) 25%, var(--surface-hi) 50%, var(--surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
}

.avatar-wrap img.loaded + .avatar-skeleton,
.avatar-skeleton.hidden { display: none; }

@keyframes shimmer {
  from { background-position: 200% 0; }
  to { background-position: -200% 0; }
}

.profile-info { min-width: 0; flex: 1; }

.display-name {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 3px;
  word-break: break-word;
  line-height: 1.2;
}

.username {
  color: var(--primary);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 10px;
  word-break: break-word;
}

.badge-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.id-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  background: var(--surface-hi);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 11.5px;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

/* Done state */
.done {
  text-align: center;
  padding: 36px 24px 32px;
  position: relative;
}

.check-wrap {
  display: inline-block;
  margin-bottom: 16px;
  animation: bounceIn 0.7s var(--ease-spring);
}

@keyframes bounceIn {
  0% { transform: scale(0); }
  60% { transform: scale(1.15); }
  100% { transform: scale(1); }
}

.check-svg { overflow: visible; }

.check-circle {
  fill: none;
  stroke: var(--accent);
  stroke-width: 4;
  stroke-dasharray: 201;
  stroke-dashoffset: 201;
  animation: drawCircle 0.7s 0.1s var(--ease-out) forwards;
}

.check-mark {
  fill: none;
  stroke: var(--accent);
  stroke-width: 5;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 50;
  stroke-dashoffset: 50;
  animation: drawCheck 0.4s 0.7s var(--ease-out) forwards;
}

@keyframes drawCircle { to { stroke-dashoffset: 0; } }
@keyframes drawCheck { to { stroke-dashoffset: 0; } }

.done-title {
  font-family: var(--font-display);
  font-size: 38px;
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  font-style: italic;
}

.done-text {
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.55;
  margin-bottom: 22px;
  max-width: 340px;
  margin-left: auto;
  margin-right: auto;
}

/* Confetti (subtle) */
.confetti {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.confetti span {
  position: absolute;
  width: 8px;
  height: 8px;
  top: 40%;
  left: 50%;
  opacity: 0;
  border-radius: 2px;
}

.confetti.go span { animation: confettiPop 1.2s var(--ease-out) forwards; }

@keyframes confettiPop {
  0% { opacity: 1; transform: translate(0, 0) scale(0.5) rotate(0deg); }
  100% { opacity: 0; transform: translate(var(--x, 0), var(--y, 0)) scale(1) rotate(360deg); }
}

/* Guide / How it works */
.section-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 34px;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  line-height: 1.1;
}

.section-title em {
  font-style: italic;
  color: var(--primary);
}

.steps-list { display: flex; flex-direction: column; gap: 20px; }

.guide-step {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.guide-num {
  font-family: var(--font-display);
  font-size: 28px;
  font-style: italic;
  color: var(--primary);
  min-width: 44px;
  opacity: 0.9;
  line-height: 1;
  padding-top: 4px;
}

.guide-body h3 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.guide-body p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-dim);
}

.guide-body em {
  color: var(--text);
  font-style: normal;
  font-weight: 600;
}

code {
  font-family: 'Geist Mono', 'SF Mono', Consolas, monospace;
  font-size: 12.5px;
  padding: 2px 7px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--sky);
}

.url-demo {
  margin-top: 10px;
  padding: 12px 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: 'Geist Mono', monospace;
  font-size: 12.5px;
  word-break: break-all;
}

.url-dim { color: var(--text-hint); }
.url-hi {
  color: var(--primary);
  background: rgba(200, 182, 255, 0.15);
  padding: 2px 4px;
  border-radius: 4px;
  font-weight: 600;
}

/* Tips card */
.tips-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--primary);
}

.tips-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }

.tips-list li {
  position: relative;
  padding-left: 22px;
  font-size: 13.5px;
  color: var(--text-dim);
  line-height: 1.55;
}

.tips-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

.tips-list strong { color: var(--text); font-weight: 600; }

/* Credits */
.credit-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.credit {
  padding: 16px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform 0.3s var(--ease-spring), border-color 0.2s;
}

.credit:hover {
  transform: translateY(-3px);
  border-color: var(--border-hi);
}

.credit-label {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-hint);
  text-transform: uppercase;
  margin-bottom: 6px;
  font-weight: 500;
}

.credit-val {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}

.credit-val.big {
  font-family: var(--font-display);
  font-size: 26px;
  font-style: italic;
  color: var(--primary);
}

.legal p {
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-hint);
  text-align: center;
}

/* Mobile */
@media (max-width: 500px) {
  body { padding: 16px 12px 40px; }
  .card { padding: 22px 20px; border-radius: var(--radius); }
  .tab span { display: none; }
  .tab { padding: 12px 10px; }
  .profile { flex-direction: column; text-align: center; }
  .profile-info { text-align: center; }
  .badge-row { justify-content: center; }
  .btn-row { grid-template-columns: 1fr; }
  .credit-list { grid-template-columns: 1fr; }
  .section-title { font-size: 28px; }
  .done-title { font-size: 32px; }
  .guide-step { flex-direction: column; gap: 8px; }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}