/* ============================================
   like.et — Design System & Styles
   Living Social Graph Teaser
   ============================================ */

/* ---------- Google Font ---------- */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ---------- Design Tokens ---------- */
:root {
  /* Brand colors (from logo) */
  --bg-deep: #0b1929;
  --bg-surface: #0f2137;
  --bg-elevated: #142d4a;
  --brand-blue: #2e7cb5;
  --brand-light: #d0e4f2;
  --brand-white: #f0f4f8;
  --accent-glow: #4da8da;
  --accent-warm: #f5a623;
  --accent-pink: #da4da8;
  --accent-lime: #7dda4d;
  --accent-coral: #da6b4d;

  /* Glass panel */
  --glass-bg: rgba(11, 25, 41, 0.72);
  --glass-border: rgba(78, 168, 218, 0.15);
  --glass-blur: 20px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(77, 168, 218, 0.2);

  /* Typography */
  --font-main: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --text-xs: 0.7rem;
  --text-sm: 0.8rem;
  --text-base: 0.95rem;
  --text-lg: 1.15rem;
  --text-xl: 1.5rem;
  --text-2xl: 2rem;
  --text-3xl: 2.8rem;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 36px;
  --space-2xl: 48px;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 100px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 600ms;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-main);
  background: var(--bg-deep);
  color: var(--brand-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  position: relative;
}

/* ---------- Graph Canvas Container ---------- */
#graph-container {
  position: fixed;
  inset: 0;
  z-index: 1;
}

#graph-container canvas {
  display: block;
}

/* ---------- Starfield Background ---------- */
#starfield {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* ---------- Glass Panel Base ---------- */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-normal) var(--ease-out);
}

.glass-panel:hover {
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

/* ---------- Logo ---------- */
#logo-container {
  position: fixed;
  top: var(--space-lg);
  left: var(--space-lg);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

#logo-container img {
  height: 36px;
  width: auto;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.5));
  transition: transform var(--duration-normal) var(--ease-spring);
}

#logo-container img:hover {
  transform: scale(1.05);
}

/* ---------- Tagline ---------- */
#tagline {
  position: fixed;
  top: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  text-align: center;
  pointer-events: none;
}

#tagline-text {
  font-size: var(--text-base);
  font-weight: 400;
  color: var(--brand-light);
  opacity: 0.7;
  letter-spacing: 0.02em;
  transition: opacity var(--duration-slow) var(--ease-out);
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.5);
  white-space: nowrap;
}

/* ---------- Stats Bar ---------- */
#stats-bar {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  z-index: 100;
  display: flex;
  gap: var(--space-sm);
}

.stat-badge {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--brand-light);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.stat-badge .stat-value {
  color: var(--accent-glow);
  font-variant-numeric: tabular-nums;
  transition: transform var(--duration-fast) var(--ease-spring);
}

.stat-badge .stat-value.bump {
  transform: scale(1.3);
}

.stat-badge .stat-icon {
  font-size: var(--text-base);
}

/* ---------- Controls Panel (Bottom-Left) ---------- */
#controls-panel {
  position: fixed;
  bottom: var(--space-lg);
  left: var(--space-lg);
  z-index: 100;
  padding: var(--space-md);
  min-width: 200px;
  max-width: 260px;
}

#controls-panel h3 {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--accent-glow);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

/* Color mode selector */
.color-mode-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.color-mode-btn {
  padding: var(--space-xs) var(--space-sm);
  font-family: var(--font-main);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--brand-light);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.color-mode-btn:hover {
  background: rgba(77, 168, 218, 0.15);
  border-color: var(--accent-glow);
}

.color-mode-btn.active {
  background: var(--brand-blue);
  border-color: var(--accent-glow);
  color: #fff;
  box-shadow: 0 0 12px rgba(77, 168, 218, 0.3);
}

/* Find Me button */
#find-me-btn {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-main);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--bg-deep);
  background: linear-gradient(135deg, var(--accent-glow), var(--brand-blue));
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-spring);
  position: relative;
  overflow: hidden;
}

#find-me-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 30%, rgba(255,255,255,0.2) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.6s;
}

#find-me-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(77, 168, 218, 0.4);
}

#find-me-btn:hover::after {
  transform: translateX(100%);
}

#find-me-btn:active {
  transform: translateY(0) scale(0.97);
}

/* ---------- Share Panel (Bottom-Right) ---------- */
#share-panel {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  z-index: 100;
  padding: var(--space-md) var(--space-lg);
  min-width: 280px;
  max-width: 340px;
}

#share-panel h3 {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--accent-warm);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.share-subtitle {
  font-size: var(--text-xs);
  color: var(--brand-light);
  opacity: 0.6;
  margin-bottom: var(--space-md);
}

/* Referral URL display */
.ref-url-box {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
}

.ref-url-text {
  flex: 1;
  font-size: var(--text-sm);
  font-family: 'Space Grotesk', monospace;
  color: var(--accent-glow);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  user-select: all;
}

.copy-btn {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  color: var(--brand-light);
  cursor: pointer;
  font-size: var(--text-base);
  transition: all var(--duration-fast) var(--ease-out);
}

.copy-btn:hover {
  background: var(--brand-blue);
  border-color: var(--accent-glow);
  transform: scale(1.05);
}

.copy-btn.copied {
  background: rgba(125, 218, 77, 0.2);
  border-color: var(--accent-lime);
  color: var(--accent-lime);
}

/* Share buttons */
.share-actions {
  display: flex;
  gap: var(--space-sm);
}

.share-btn {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-main);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--brand-white);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  text-align: center;
}

.share-btn:hover {
  background: rgba(245, 166, 35, 0.15);
  border-color: var(--accent-warm);
  transform: translateY(-1px);
}

/* Referral count */
.ref-count {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  text-align: center;
}

.ref-count-number {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--accent-warm);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.ref-count-label {
  font-size: var(--text-xs);
  color: var(--brand-light);
  opacity: 0.5;
  margin-top: var(--space-xs);
}

/* ---------- Event Banner (Top Center, below tagline) ---------- */
#event-banner {
  position: fixed;
  top: calc(var(--space-lg) + 36px);
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  z-index: 100;
  padding: var(--space-xs) var(--space-lg);
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: all var(--duration-slow) var(--ease-out);
}

#event-banner.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

#event-banner .event-name {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--accent-warm);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

#event-banner .event-countdown {
  font-size: var(--text-xs);
  color: var(--brand-light);
  opacity: 0.6;
  margin-top: 2px;
  font-variant-numeric: tabular-nums;
}

/* ---------- Tooltip ---------- */
#node-tooltip {
  position: fixed;
  z-index: 200;
  padding: var(--space-sm) var(--space-md);
  pointer-events: none;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--duration-fast), transform var(--duration-fast);
  max-width: 220px;
  font-size: var(--text-xs);
  line-height: 1.5;
}

#node-tooltip.visible {
  opacity: 1;
  transform: translateY(0);
}

#node-tooltip .tooltip-row {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--brand-light);
}

#node-tooltip .tooltip-row .tooltip-icon {
  width: 14px;
  text-align: center;
  opacity: 0.6;
}

#node-tooltip .tooltip-row .tooltip-value {
  font-weight: 500;
}

/* ---------- Loading State ---------- */
#loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: var(--bg-deep);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  transition: opacity var(--duration-slow) var(--ease-out);
}

#loading-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

#loading-overlay img {
  height: 48px;
  animation: loadPulse 2s ease-in-out infinite;
}

#loading-spinner-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

/* Entry Gate */
#entry-gate-content {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-width: 320px;
  animation: fadeInUp var(--duration-normal) var(--ease-out);
}

#entry-gate-content img {
  height: 40px;
  margin-bottom: var(--space-md);
  animation: none;
}

#entry-gate-content h2 {
  font-size: var(--text-xl);
  color: var(--accent-glow);
  margin-bottom: var(--space-xs);
}

#entry-gate-content p {
  font-size: var(--text-sm);
  color: var(--brand-light);
  opacity: 0.7;
  margin-bottom: var(--space-lg);
}

#nickname-form {
  display: flex;
  width: 100%;
  gap: var(--space-sm);
}

#nickname-input {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-main);
  font-size: var(--text-base);
  color: var(--brand-white);
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--duration-fast);
}

#nickname-input:focus {
  border-color: var(--accent-glow);
}

#nickname-submit {
  width: 44px;
  background: var(--brand-blue);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: var(--text-lg);
  cursor: pointer;
  transition: all var(--duration-fast);
}

#nickname-submit:hover {
  background: var(--accent-glow);
  transform: scale(1.05);
}

@keyframes loadPulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}

#loading-text {
  font-size: var(--text-sm);
  color: var(--brand-light);
  opacity: 0.5;
  letter-spacing: 0.1em;
}

.loading-dots::after {
  content: '';
  animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
  0% { content: ''; }
  25% { content: '.'; }
  50% { content: '..'; }
  75% { content: '...'; }
}

/* ---------- Intro Animation ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-in {
  animation: fadeInUp var(--duration-slow) var(--ease-out) both;
}

.animate-in-delay-1 { animation-delay: 0.1s; }
.animate-in-delay-2 { animation-delay: 0.2s; }
.animate-in-delay-3 { animation-delay: 0.3s; }
.animate-in-delay-4 { animation-delay: 0.4s; }

/* ---------- Mobile Sheet (Desktop passthrough) ---------- */
#mobile-sheet-backdrop {
  display: none;
}

#mobile-sheet-handle-wrap {
  display: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  #tagline {
    display: none;
  }

  #stats-bar {
    top: auto;
    bottom: auto;
    top: var(--space-lg);
    right: var(--space-md);
    flex-direction: column;
    gap: 2px;
  }

  .stat-badge {
    padding: 2px var(--space-sm);
    font-size: var(--text-xs);
  }

  #logo-container {
    top: var(--space-md);
    left: var(--space-md);
  }

  #logo-container img {
    height: 28px;
  }

  /* --- Convert Panels to Bottom Sheet --- */
  #mobile-sheet-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 199;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease-out;
  }
  
  #mobile-sheet-backdrop.visible {
    opacity: 1;
    pointer-events: auto;
  }

  #mobile-sheet {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(15, 33, 55, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    border-radius: 24px 24px 0 0;
    z-index: 200;
    padding: var(--space-md) var(--space-lg) var(--space-xl);
    transform: translateY(calc(100% - 40px));
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    max-height: 85vh;
    overflow-y: auto;
  }
  
  #mobile-sheet.open {
    transform: translateY(0);
  }
  
  #mobile-sheet-handle-wrap {
    display: flex;
    width: 100%;
    height: 40px;
    position: absolute;
    top: 0;
    left: 0;
    justify-content: center;
    align-items: center;
    cursor: grab;
  }
  
  #mobile-sheet-handle {
    width: 40px;
    height: 5px;
    background: rgba(255, 255, 255, 0.4);
    border-radius: 5px;
  }

  /* Strip absolute positioning from panels inside the sheet */
  #controls-panel, #leaderboard-panel, #share-panel {
    position: static;
    transform: none;
    max-width: none;
    min-width: 0;
    width: 100%;
    margin-bottom: var(--space-xl);
    box-shadow: none;
    backdrop-filter: none;
    background: transparent;
    border: none;
    padding: 0;
    max-height: none;
  }

  /* Add margin to first panel to clear the handle */
  #controls-panel {
    margin-top: 24px;
  }

  #controls-panel h3, #share-panel h3, #leaderboard-panel h3 {
    font-size: var(--text-xs);
    margin-bottom: var(--space-xs);
    position: static;
    background: transparent;
  }

  .leaderboard-item {
    font-size: var(--text-xs);
    padding: 4px var(--space-xs);
  }

  .ref-count-number {
    font-size: var(--text-xl);
  }
}

@media (max-width: 480px) {
  /* No additional changes needed, the sheet works great on phones too */
}

/* ---------- Scrollbar (for any overflow) ---------- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(77, 168, 218, 0.3);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(77, 168, 218, 0.5);
}

/* ---------- Selection ---------- */
::selection {
  background: rgba(77, 168, 218, 0.3);
  color: #fff;
}

/* ---------- Leaderboard Panel ---------- */
@media (min-width: 769px) {
  #leaderboard-panel {
    position: fixed;
    top: 90px;
    left: var(--space-lg);
    transform: none;
    z-index: 100;
    padding: var(--space-md);
    min-width: 220px;
    max-width: 260px;
    max-height: calc(100vh - 350px);
    overflow-y: auto;
  }

  #leaderboard-panel h3 {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--accent-glow);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
    position: sticky;
    top: 0;
    background: var(--glass-bg);
    padding-bottom: var(--space-xs);
    z-index: 2;
  }
}

#leaderboard-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.leaderboard-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-xs) var(--space-sm);
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  transition: background var(--duration-fast);
}

.leaderboard-item:hover {
  background: rgba(255, 255, 255, 0.08);
}

.leaderboard-rank {
  font-weight: 700;
  color: var(--accent-glow);
  width: 20px;
}

.leaderboard-name {
  flex: 1;
  color: var(--brand-white);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-score {
  font-weight: 600;
  color: var(--accent-warm);
}

/* ---------- Time Slider ---------- */
.time-slider-group {
  margin-top: var(--space-md);
  margin-bottom: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.time-slider-group h3 {
  margin-bottom: var(--space-sm);
}

#time-slider {
  width: 100%;
  appearance: none;
  background: rgba(255, 255, 255, 0.1);
  height: 4px;
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

#time-slider::-webkit-slider-thumb {
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-glow);
  cursor: pointer;
  transition: transform 0.1s;
}

#time-slider::-webkit-slider-thumb:hover {
  transform: scale(1.3);
}

.time-slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 4px;
}

/* ---------- Email Capture ---------- */
.email-capture {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.email-capture h3 {
  margin-bottom: 2px !important;
  color: var(--accent-glow) !important;
}

.email-subtitle {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--space-sm);
}

#email-form {
  display: flex;
  gap: 4px;
}

#email-input {
  flex: 1;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  color: white;
  font-family: var(--font-main);
  font-size: var(--text-xs);
  outline: none;
  transition: border-color var(--duration-fast);
}

#email-input:focus {
  border-color: var(--accent-glow);
}

#email-submit-btn {
  background: var(--brand-blue);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0 12px;
  cursor: pointer;
  font-weight: bold;
  transition: background 0.2s, transform 0.2s;
}

#email-submit-btn:hover {
  background: var(--accent-glow);
  transform: translateX(2px);
}

#email-success-msg {
  font-size: var(--text-xs);
  color: var(--accent-lime);
  margin-top: var(--space-xs);
}