:root{
  /* ---- Color tokens (light mode defaults) ---- */
  --color-white: rgba(255,255,255,1);
  --color-black: rgba(0,0,0,1);
  --color-cream-50: rgba(252,252,249,1);
  --color-cream-100: rgba(255,255,253,1);
  --color-slate-900: rgba(19,52,59,1);
  --color-slate-500: rgba(98,108,113,1);
  --color-brown-600-rgb: 94,82,64;
  --color-teal-500-rgb: 33,128,141;
  --color-teal-500: rgba(var(--color-teal-500-rgb),1);
  --color-teal-600: rgba(29,116,128,1);
  --color-teal-300: rgba(50,184,198,1);
  --color-red-500: rgba(192,21,47,1);
  --color-red-400: rgba(255,84,89,1);
  --color-orange-500: rgba(168,75,47,1);

  /* Semantic tokens */
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-primary-active: rgba(26,104,115,1);
  --color-secondary: rgba(var(--color-brown-600-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-brown-600-rgb), 0.2);
  --color-border: rgba(var(--color-brown-600-rgb), 0.2);
  --color-btn-primary-text: var(--color-cream-50);
  --color-card-border: rgba(var(--color-brown-600-rgb), 0.12);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.14);

  /* fonts & spacing */
  --font-family-base: "FKGroteskNeue", "Geist", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: "Berkeley Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-size-base: 14px;
  --font-size-sm: 12px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 30px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 550;
  --font-weight-bold: 600;
  --radius-sm: 6px;
  --radius-base: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  --space-1: 1px;
  --space-4: 4px;
  --space-8: 8px;
  --space-10: 10px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-32: 32px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.02);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 20px rgba(0,0,0,0.08);
  --focus-ring: 0 0 0 4px var(--color-focus-ring);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --ease-standard: cubic-bezier(0.16,1,0.3,1);

  /* layout widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

/* ---- Dark mode override: uses prefers-color-scheme OR manual attribute ---- */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: rgba(31,33,33,1);
    --color-surface: rgba(38,40,40,1);
    --color-text: rgba(245,245,245,1);
    --color-text-secondary: rgba(167,169,169,0.9);
    --color-primary: rgba(50,184,198,1);
    --color-primary-hover: rgba(45,166,178,1);
    --color-card-border: rgba(119,124,124,0.18);
    --color-border: rgba(119,124,124,0.2);
    --color-btn-primary-text: rgba(19,52,59,1);
    --color-focus-ring: rgba(50,184,198,0.16);
  }
}

/* manual data attribute to force dark/light */
[data-color-scheme="dark"]{
  --color-background: rgba(31,33,33,1);
  --color-surface: rgba(38,40,40,1);
  --color-text: rgba(245,245,245,1);
  --color-text-secondary: rgba(167,169,169,0.9);
  --color-primary: rgba(50,184,198,1);
  --color-primary-hover: rgba(45,166,178,1);
  --color-card-border: rgba(119,124,124,0.18);
  --color-border: rgba(119,124,124,0.2);
  --color-btn-primary-text: rgba(19,52,59,1);
  --color-focus-ring: rgba(50,184,198,0.16);
}

[data-color-scheme="light"]{
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-card-border: rgba(var(--color-brown-600-rgb),0.12);
  --color-border: rgba(var(--color-brown-600-rgb),0.2);
  --color-btn-primary-text: var(--color-cream-50);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.14);
}

/* ---- Base & typography ---- */
html{
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
  color: var(--color-text);
  background: var(--color-background);
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
}
*, *::before, *::after { box-sizing: inherit; }
body{ margin:0; padding:0; }

/* headings */
h1,h2,h3,h4,h5,h6{
  margin:0;
  font-weight: var(--font-weight-semibold);
  line-height: 1.15;
  color: var(--color-text);
  letter-spacing: -0.01em;
}
h1{ font-size: var(--font-size-4xl); }
h2{ font-size: var(--font-size-3xl); }
h3{ font-size: var(--font-size-2xl); }

/* text & links */
p{ margin: 0 0 var(--space-16) 0; }
a{ color: var(--color-primary); text-decoration: none; transition: color var(--duration-fast) var(--ease-standard); }
a:hover{ color: var(--color-primary-hover); }

/* code / pre */
code, pre { font-family: var(--font-family-mono); font-size: calc(var(--font-size-base) * 0.95); }
code{ padding: var(--space-1) var(--space-4); border-radius: var(--radius-sm); background: var(--color-secondary); }

/* ---- Buttons ---- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-base);
  font-size: var(--font-size-base);
  font-weight: 500;
  cursor:pointer;
  border: none;
  background: transparent;
  transition: transform var(--duration-fast) var(--ease-standard), box-shadow var(--duration-fast) var(--ease-standard), background var(--duration-fast) var(--ease-standard), opacity var(--duration-fast);
  position: relative;
}
.btn:active{ transform: translateY(1px); }
.btn:focus-visible{ outline: none; box-shadow: var(--focus-ring); }

.btn--primary{
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
}
.btn--primary:hover{ background: var(--color-primary-hover); }
.btn--primary:active{ background: var(--color-primary-active); }

.btn--secondary{
  background: var(--color-secondary);
  color: var(--color-text);
}
.btn--secondary:hover{ background: var(--color-secondary-hover); }

.btn--outline{
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}
.btn--outline:hover{ background: var(--color-secondary); }

.btn--sm{ padding: 6px 12px; font-size: var(--font-size-sm); border-radius: var(--radius-sm); line-height:1.2; }
.btn--lg{ padding: 12px 20px; font-size: var(--font-size-lg); border-radius: var(--radius-md); line-height:1.2; }
.btn--full-width{ width:100%; display:block; }

/* game-specific variants */
.btn--success{ background: var(--color-success); color: var(--color-btn-primary-text); }
.btn--success:hover{ background: var(--color-primary-hover); }
.btn--error{ background: var(--color-error); color: var(--color-white); }
.btn--error:hover{ opacity: 0.92; }

/* ---- Forms ---- */
.form-control{
  display:block;
  width:100%;
  padding: var(--space-8) var(--space-12);
  font-size: var(--font-size-md);
  border-radius: var(--radius-base);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
}
.form-control:focus{ border-color: var(--color-primary); box-shadow: var(--focus-ring); outline: none; }
.form-label{ display:block; margin-bottom: var(--space-8); font-weight: var(--font-weight-medium); font-size: var(--font-size-sm); color: var(--color-text-secondary); }
.form-group{ margin-bottom: var(--space-16); }

/* select caret images - light and dark variations */
:root { --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E"); }
[data-color-scheme="dark"]{ --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E"); }
select.form-control{ -webkit-appearance:none; -moz-appearance:none; appearance:none; background-image: var(--select-caret-light); background-repeat:no-repeat; background-position: right 12px center; background-size: 16px; padding-right: 40px; }
[data-color-scheme="dark"] select.form-control{ background-image: var(--select-caret-dark); }

/* ---- Container ---- */
.container{
  width:100%;
  margin-left:auto;
  margin-right:auto;
  padding-left: var(--space-16);
  padding-right: var(--space-16);
}
@media (min-width: 640px){ .container{ max-width: var(--container-sm); } }
@media (min-width: 768px){ .container{ max-width: var(--container-md); } }
@media (min-width: 1024px){ .container{ max-width: var(--container-lg); } }
@media (min-width: 1280px){ .container{ max-width: var(--container-xl); } }

/* ---- Utilities ---- */
.flex{ display:flex; }
.flex-col{ flex-direction:column; }
.items-center{ align-items:center; }
.justify-between{ justify-content:space-between; }
.justify-center{ justify-content:center; }
.hidden{ display:none !important; }

/* ---- Navbar ---- */
.nav-menu {
  display: flex !important;
  flex-direction: row !important;
  align-items: center;
  gap: var(--space-20);
}
.navbar{
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-12) 0;
  position: sticky;
  top:0;
  z-index: 200;
}
.navbar .container{ display:flex; align-items:center; justify-content:space-between; gap: var(--space-16); }
.nav-brand h2{ margin:0; color: var(--color-primary); font-size: var(--font-size-lg); }
.nav-menu{ display:flex; align-items:center; gap: var(--space-20); }
.nav-link{ color: var(--color-text); font-weight: var(--font-weight-medium); transition: color var(--duration-fast); }
.nav-link:hover{ color: var(--color-primary); }
.auth-buttons{ display:flex; gap: var(--space-8); }
.user-menu{ display:flex; align-items:center; gap: var(--space-16); }
.balance{ font-weight: var(--font-weight-semibold); color: var(--color-success); }

/* ---- Pages ---- */
.page{ display:block; }
.page.hidden{ display:none !important; }

/* ---- Hero Section ---- */
.hero{
  background: linear-gradient(135deg, rgba(59,130,246,0.08), rgba(6,182,212,0.08));
  padding: var(--space-32) 0;
  min-height: 60vh;
  display:flex;
  align-items:center;
}
.hero .container{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-32);
  align-items:center;
}
.hero-content h1{
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-16);
  background: linear-gradient(45deg, var(--color-primary), var(--color-teal-300));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-content p{ font-size: var(--font-size-xl); color: var(--color-text-secondary); margin-bottom: var(--space-24); }
.hero-buttons{ display:flex; gap: var(--space-16); margin-bottom: var(--space-24); justify-content:flex-start; }
.hero-chart{ background: var(--color-surface); border-radius: var(--radius-lg); padding: var(--space-20); box-shadow: var(--shadow-lg); min-height: 200px; display:flex; align-items:center; justify-content:center; }
.hero-chart canvas{ width:100% !important; height: 200px !important; object-fit: cover; }

/* small screens - hero */
@media (max-width: 768px){
  .hero .container{ grid-template-columns: 1fr; text-align:center; }
  .hero-buttons{ justify-content:center; }
  .hero-chart{ margin-top: var(--space-20); }
  .nav-menu{ flex-direction: column; gap: var(--space-12); align-items:flex-end; }
}

/* ---- Features ---- */
.features{ padding: var(--space-32) 0; }
.features h2{ text-align:center; margin-bottom: var(--space-32); }
.features-grid{ display:grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--space-24); }
.feature-card{ background: var(--color-surface); padding: var(--space-24); border-radius: var(--radius-lg); border: 1px solid var(--color-border); text-align:center; }
.feature-card h3{ color: var(--color-primary); margin-bottom: var(--space-12); }

/* ---- Auth (register/login) ---- */
.auth-container{ min-height: 100vh; display:flex; align-items:center; justify-content:center; background: linear-gradient(180deg, rgba(59,130,246,0.02), rgba(6,182,212,0.02)); padding: var(--space-20); }
.auth-form{ background: var(--color-surface); padding: var(--space-32); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); width:100%; max-width:400px; }
.auth-form h2{ text-align:center; margin-bottom: var(--space-8); }
.auth-subtitle{ text-align:center; color: var(--color-text-secondary); margin-bottom: var(--space-24); }
.auth-switch{ text-align:center; margin-top: var(--space-16); color: var(--color-text-secondary); }
.demo-accounts{ background: rgba(34,197,94,0.06); padding: var(--space-16); border-radius: var(--radius-base); margin-top: var(--space-16); }
.demo-accounts h4{ margin:0 0 var(--space-8) 0; color: var(--color-success); }

/* ---- Dashboard ---- */
.dashboard-header{ display:flex; justify-content:space-between; align-items:center; margin-bottom: var(--space-32); gap: var(--space-16); flex-wrap:wrap; }
.user-stats{ display:flex; gap: var(--space-16); flex-wrap:wrap; }
.stat-card{ background: var(--color-surface); padding: var(--space-16); border-radius: var(--radius-base); border: 1px solid var(--color-border); text-align:center; min-width:120px; }
.stat-label{ font-size: var(--font-size-sm); color: var(--color-text-secondary); margin-bottom: var(--space-4); display:block; }
.stat-value{ font-size: var(--font-size-xl); font-weight: var(--font-weight-semibold); color: var(--color-text); }

/* ---- Game container & chart area ---- */
.game-container{ display:grid; grid-template-columns: 2fr 1fr; gap: var(--space-24); margin-bottom: var(--space-32); }
.chart-section{ background: var(--color-surface); border-radius: var(--radius-lg); padding: var(--space-20); border:1px solid var(--color-border); }
.chart-container{ position: relative; height: 400px; }
.chart-container canvas{ width:100% !important; height:100% !important; border-radius: var(--radius-base); background: var(--color-background); }
.chart-header{ display:flex; justify-content:space-between; align-items:center; margin-bottom: var(--space-16); gap: var(--space-12); }
.live-indicator{ color: var(--color-success); animation: pulse 2s infinite; }
@keyframes pulse{ 0%{ opacity:1 } 50%{ opacity:0.5 } 100%{ opacity:1 } }
.timeframe-selector{ display:flex; gap: var(--space-4); }
.timeframe-btn{ padding: var(--space-4) var(--space-12); border:1px solid var(--color-border); background: var(--color-secondary); border-radius: var(--radius-sm); cursor:pointer; font-size: var(--font-size-sm); transition: all var(--duration-fast); }
.timeframe-btn.active{ background: var(--color-primary); color: var(--color-btn-primary-text); border-color: var(--color-primary); }

/* price box */
.current-price{ display:flex; justify-content:center; align-items:center; gap: var(--space-8); margin-top: var(--space-16); padding: var(--space-12); background: rgba(var(--color-teal-500-rgb), 0.06); border-radius: var(--radius-base); }
.price-label{ font-weight: var(--font-weight-medium); color: var(--color-text-secondary); }
.price-value{ font-size: var(--font-size-xl); font-weight: var(--font-weight-bold); color: var(--color-text); }
.price-change{ padding: var(--space-4) var(--space-8); border-radius: var(--radius-sm); font-size: var(--font-size-sm); font-weight: var(--font-weight-medium); }
.price-change.positive{ background: rgba(34,197,94,0.06); color: var(--color-success); }
.price-change.negative{ background: rgba(239,68,68,0.06); color: var(--color-error); }

/* ---- Trading panel ---- */
.trading-panel{ background: var(--color-surface); border-radius: var(--radius-lg); padding: var(--space-20); border: 1px solid var(--color-border); height: fit-content; }
.bet-controls h3{ margin-bottom: var(--space-16); text-align:center; }
.bet-amount{ margin-bottom: var(--space-16); }
.prediction-buttons{ display:flex; flex-direction:column; gap: var(--space-12); margin-bottom: var(--space-20); }
.prediction-buttons .btn{ padding: var(--space-12); font-size: var(--font-size-lg); font-weight: var(--font-weight-semibold); }
.multiplier{ position:absolute; top: var(--space-4); right: var(--space-12); font-size: var(--font-size-sm); opacity:0.85; }
.active-bet{ background: rgba(245,158,11,0.06); padding: var(--space-16); border-radius: var(--radius-base); text-align:center; }
.countdown{ font-size: var(--font-size-lg); font-weight: var(--font-weight-bold); color: var(--color-warning); margin-top: var(--space-8); }

/* recent bets */
.recent-bets h4{ margin-bottom: var(--space-12); border-top: 1px solid var(--color-border); padding-top: var(--space-16); margin-top: var(--space-20); }
.bet-item{ display:flex; justify-content:space-between; align-items:center; padding: var(--space-8); border-radius: var(--radius-sm); margin-bottom: var(--space-8); font-size: var(--font-size-sm); }
.bet-item.win{ background: rgba(34,197,94,0.06); color: var(--color-success); }
.bet-item.loss{ background: rgba(239,68,68,0.06); color: var(--color-error); }
.no-bets{ text-align:center; color: var(--color-text-secondary); font-style: italic; }

/* ---- Leaderboard ---- */
.leaderboard-section{ background: var(--color-surface); padding: var(--space-20); border-radius: var(--radius-lg); border:1px solid var(--color-border); }
.leaderboard{ display:grid; gap: var(--space-8); }
.leaderboard-item{ display:grid; grid-template-columns: 60px 1fr auto auto; gap: var(--space-12); align-items:center; padding: var(--space-12); background: rgba(59,130,246,0.03); border-radius: var(--radius-base); }
.rank{ font-weight: var(--font-weight-bold); color: var(--color-primary); text-align:center; }
.username{ font-weight: var(--font-weight-medium); color: var(--color-text); }
.profit{ font-weight: var(--font-weight-semibold); color: var(--color-success); }
.win-rate{ color: var(--color-text-secondary); }

/* ---- Wallet & Transactions ---- */
.page-header{ display:flex; justify-content:space-between; align-items:center; margin-bottom: var(--space-32); gap: var(--space-12); flex-wrap:wrap; }
.balance-display h3{ color: var(--color-success); margin:0; }
.wallet-actions{ display:flex; gap: var(--space-16); margin-bottom: var(--space-32); flex-wrap:wrap; }
.transactions-section{ background: var(--color-surface); padding: var(--space-20); border-radius: var(--radius-lg); border:1px solid var(--color-border); }
.transactions-table{ margin-top: var(--space-16); }
.table-header{ display:grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: var(--space-12); padding: var(--space-12); background: var(--color-secondary); border-radius: var(--radius-base); font-weight: var(--font-weight-semibold); font-size: var(--font-size-sm); color: var(--color-text); }
.transaction-item{ display:grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: var(--space-12); padding: var(--space-12); border-bottom: 1px solid var(--color-border); font-size: var(--font-size-sm); }

/* ---- Profile ---- */
.profile-content{ display:grid; grid-template-columns: 1fr 1fr; gap: var(--space-32); }
.profile-info, .profile-stats{ background: var(--color-surface); padding: var(--space-24); border-radius: var(--radius-lg); border:1px solid var(--color-border); }
.info-group{ display:flex; justify-content:space-between; padding: var(--space-12) 0; border-bottom: 1px solid var(--color-border); }
.info-group:last-child{ border-bottom:none; }
.info-group label{ font-weight: var(--font-weight-medium); color: var(--color-text-secondary); }
.stats-grid{ display:grid; grid-template-columns: repeat(auto-fit, minmax(120px,1fr)); gap: var(--space-16); margin-top: var(--space-16); }
.stat-item{ text-align:center; padding: var(--space-16); background: rgba(var(--color-teal-500-rgb), 0.04); border-radius: var(--radius-base); }
.stat-number{ display:block; font-size: var(--font-size-2xl); font-weight: var(--font-weight-bold); color: var(--color-primary); }
.stat-label{ font-size: var(--font-size-sm); color: var(--color-text-secondary); }

/* ---- Modals ---- */
.modal{
  position: fixed;
  inset: 0; /* top/right/bottom/left:0 */
  background: rgba(0,0,0,0.5);
  display:flex;
  align-items:center;
  justify-content:center;
  z-index: 1000;
}
.modal.hidden{ display:none !important; }
.modal-content{ background: var(--color-surface); border-radius: var(--radius-lg); max-width: 600px; width: 90%; max-height: 90vh; overflow-y:auto; box-shadow: var(--shadow-lg); }
.modal-header{ display:flex; justify-content:space-between; align-items:center; padding: var(--space-20); border-bottom: 1px solid var(--color-border); }
.modal-close{ background:none; border:none; font-size: var(--font-size-2xl); cursor:pointer; color: var(--color-text-secondary); width:36px; height:36px; display:flex; align-items:center; justify-content:center; }
.modal-body{ padding: var(--space-20); }
.modal-footer{ padding: var(--space-20); border-top: 1px solid var(--color-border); text-align:right; }

/* ---- Result styles ---- */
.result-win{ color: var(--color-success); }
.result-loss{ color: var(--color-error); }
.result-amount{ font-size: var(--font-size-2xl); font-weight: var(--font-weight-bold); margin: var(--space-16) 0; }

/* ---- Notification (JS uses inline styles but provide base styling & stacking) ---- */
.notification{
  position: fixed;
  right: 20px;
  padding: 12px 20px;
  border-radius: 8px;
  color: var(--color-white);
  font-size: 14px;
  font-weight: 500;
  z-index: 1001;
  box-shadow: var(--shadow-md);
  transform: translateY(-8px);
  transition: all 0.25s ease;
  opacity: 0.98;
  max-width: 320px;
  display:flex;
  align-items:center;
  gap:12px;
}
.notification.notification--success{ background: linear-gradient(90deg, var(--color-primary), var(--color-success)); }
.notification.notification--error{ background: linear-gradient(90deg, var(--color-error), #b23131); }
.notification.notification--warning{ background: linear-gradient(90deg, var(--color-warning), #c06b3b); }
.notification.notification--info{ background: linear-gradient(90deg, rgba(98,108,113,1), rgba(76,86,93,1)); }

/* stacking helper for multiple notifications (JS computes top offset but this helps visual attach) */
.notification + .notification{ margin-top: 8px; }

/* ---- Misc UI polish ---- */
.card{ background: var(--color-surface); border-radius: var(--radius-lg); border: 1px solid var(--color-card-border); box-shadow: var(--shadow-sm); overflow:hidden; transition: box-shadow var(--duration-normal) var(--ease-standard), transform var(--duration-fast); }
.card:hover{ box-shadow: var(--shadow-md); transform: translateY(-2px); }
.loading{ opacity: 0.6; pointer-events: none; }

/* accessibility helper */
.sr-only{ position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap; border:0; }

/* ---- Responsive adjustments ---- */
@media (max-width: 768px){
  .game-container{ grid-template-columns: 1fr; }
  .profile-content{ grid-template-columns: 1fr; }
  .wallet-actions{ flex-direction: column; }
  .features-grid{ grid-template-columns: 1fr; }
  .table-header, .transaction-item{ grid-template-columns: 1fr 1fr; gap: var(--space-8); }
  .table-header span:nth-child(n+3), .transaction-item span:nth-child(n+3){ grid-column: span 2; }
}

/* ---- Chart canvas polish ---- */
.chart-container canvas, .hero-chart canvas{ border-radius: var(--radius-base); display:block; }

/* ---- Small fixes for dark-mode outline button hover (make hover more visible) ---- */
[data-color-scheme="dark"] .btn--outline:hover{ background: rgba(255,255,255,0.03); border-color: rgba(255,255,255,0.06); }

/* ---- Font face (kept but optional) ---- */
@font-face {
  font-family: 'FKGroteskNeue';
  src: url('https://r2cdn.perplexity.ai/fonts/FKGroteskNeue.woff2') format('woff2');
  font-weight: 300 800;
  font-style: normal;
  font-display: swap;
}

/* End of stylesheet */