/* === Reset & Base === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #FAFAFA;
  --text: #111111;
  --text-muted: #888888;
  --text-light: #BBBBBB;
  --accent: #111111;
  --border: #E5E5E5;
  --card-bg: #FFFFFF;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow: hidden;
}

/* === Layout === */
.phase {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.8s ease;
}

.phase.active {
  opacity: 1;
  pointer-events: auto;
}

.container {
  width: 100%;
  max-width: 520px;
  padding: 2rem;
  text-align: center;
}

/* === Phase: Join === */
.hero {
  margin-bottom: 3.5rem;
}

.title {
  font-size: 3rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.subtitle {
  font-size: 1.125rem;
  font-weight: 300;
  color: var(--text-muted);
  letter-spacing: -0.01em;
}

.btn-primary {
  display: inline-block;
  padding: 1rem 3rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: #FFFFFF;
  background: var(--accent);
  border: none;
  border-radius: 100px;
  cursor: pointer;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.btn-primary:hover {
  transform: scale(1.02);
  opacity: 0.9;
}

.btn-primary:active {
  transform: scale(0.98);
}

.global-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  margin-top: 3.5rem;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-divider {
  width: 1px;
  height: 2.5rem;
  background: var(--border);
}

/* === Phase: Wait === */
.position-display {
  margin-bottom: 3rem;
}

.position-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

.position-number {
  font-size: 6rem;
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  transition: opacity 0.15s ease;
}

.position-number.updating {
  opacity: 0.4;
}

.queue-info {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.queue-stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.queue-stat-value {
  font-size: 1.25rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.queue-stat-label {
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.progress-container {
  width: 100%;
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 2.5rem;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.ambient-message {
  font-size: 0.875rem;
  font-weight: 300;
  color: var(--text-light);
  letter-spacing: -0.01em;
  transition: opacity 0.5s ease;
  min-height: 1.4em;
}

.ambient-message.fading {
  opacity: 0;
}

/* === Phase: Reveal === */
.reveal-text {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.reveal-line {
  font-size: 2rem;
  font-weight: 300;
  letter-spacing: -0.02em;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 1s ease, transform 1s ease;
}

.reveal-line.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-final {
  font-weight: 500;
  margin-top: 0.5rem;
}

/* === Phase: Certificate === */
.certificate {
  margin-bottom: 2.5rem;
}

.cert-border {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  background: var(--card-bg);
}

.cert-header {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.cert-divider {
  width: 40px;
  height: 1px;
  background: var(--border);
  margin: 1.5rem auto;
}

.cert-body {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.cert-visitor {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin: 0.5rem 0;
  font-variant-numeric: tabular-nums;
}

.cert-duration {
  font-size: 2.5rem;
  font-weight: 600;
  letter-spacing: -0.04em;
  margin: 0.5rem 0 0.75rem;
}

.cert-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cert-serial {
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--text-light);
  letter-spacing: 0.05em;
  font-variant-numeric: tabular-nums;
}

.cert-date {
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--text-light);
}

.cert-total {
  font-size: 0.75rem;
  font-weight: 300;
  color: var(--text-light);
  margin-top: 1.25rem;
}

.cert-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-secondary {
  padding: 0.75rem 1.75rem;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 100px;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.btn-secondary:hover {
  background: var(--border);
  border-color: #ccc;
}

.btn-tertiary {
  padding: 0.75rem 1.75rem;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-light);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color 0.2s ease;
}

.btn-tertiary:hover {
  color: var(--text-muted);
}

/* === Copied tooltip === */
.btn-secondary.copied {
  border-color: #111;
}
.btn-secondary.copied::after {
  content: 'Copied';
  position: absolute;
  bottom: -1.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* === Responsive === */
@media (max-width: 480px) {
  .title {
    font-size: 2.25rem;
  }

  .position-number {
    font-size: 4.5rem;
  }

  .queue-info {
    gap: 1.5rem;
  }

  .cert-duration {
    font-size: 2rem;
  }

  .cert-border {
    padding: 2rem 1.5rem;
  }

  .container {
    padding: 1.5rem;
  }
}

/* === Utility === */
.hidden {
  display: none !important;
}