/* ═══════════════════════════════════════════════════════════
   Tranche Protocol — Design System
   ═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Tokens ─────────────────────────────────────────────── */
:root {
  --bg-deepest: #06080d;
  --bg-base: #0a0e18;
  --bg-surface: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(25, 35, 58, 0.8);
  --bg-glass: rgba(15, 23, 42, 0.55);

  --border-subtle: rgba(148, 163, 184, 0.08);
  --border-default: rgba(148, 163, 184, 0.12);
  --border-accent: rgba(99, 102, 241, 0.3);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #818cf8;

  --accent-primary: #6366f1;
  --accent-primary-hover: #818cf8;
  --accent-secondary: #8b5cf6;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a78bfa 100%);

  --success: #34d399;
  --success-bg: rgba(52, 211, 153, 0.08);
  --warning: #fbbf24;
  --warning-bg: rgba(251, 191, 36, 0.08);
  --danger: #f87171;
  --danger-bg: rgba(248, 113, 113, 0.08);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.1);

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg-deepest);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Background Effects ─────────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -20%, rgba(99, 102, 241, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 50%),
    radial-gradient(ellipse 50% 30% at 20% 60%, rgba(99, 102, 241, 0.04) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ── Grid Overlay ───────────────────────────────────────── */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* ── Layout ─────────────────────────────────────────────── */
.app-container {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.app-container.narrow {
  max-width: 800px;
}

/* ── Navigation ─────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: rgba(6, 8, 13, 0.75);
  border-bottom: 1px solid var(--border-subtle);
}

.navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
}

.nav-brand-icon {
  width: 32px;
  height: 32px;
  background: var(--accent-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
  color: white;
}

.nav-brand-text {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.nav-brand-text span {
  color: var(--text-accent);
}

.nav-links {
  display: flex;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(148, 163, 184, 0.06);
}

.nav-links a.active {
  color: var(--accent-primary-hover);
  background: var(--accent-glow);
}

.nav-wallet-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-accent);
  background: rgba(99, 102, 241, 0.08);
  color: var(--text-accent);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.nav-wallet-btn:hover {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--accent-primary);
}

.nav-wallet-btn.connected {
  color: var(--success);
  border-color: rgba(52, 211, 153, 0.3);
  background: rgba(52, 211, 153, 0.06);
}

/* ── Hero ───────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 64px 0 48px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
}

.hero h1 .gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.card-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.card-badge.live {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(52, 211, 153, 0.15);
}

.card-badge.live::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ── Stats Grid ─────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  transition: all var(--transition-base);
}

.stat-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.stat-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.stat-value {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.stat-value.accent {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ── Prize Section ──────────────────────────────────────── */
.prize-section {
  margin-bottom: 32px;
}

.prize-card {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(139, 92, 246, 0.06) 100%);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-xl);
  padding: 36px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.prize-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: conic-gradient(
    from 0deg,
    transparent 0deg,
    rgba(99, 102, 241, 0.03) 60deg,
    transparent 120deg,
    rgba(139, 92, 246, 0.02) 180deg,
    transparent 240deg,
    rgba(99, 102, 241, 0.03) 300deg,
    transparent 360deg
  );
  animation: rotate-bg 20s linear infinite;
  pointer-events: none;
}

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

.prize-label {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-accent);
  margin-bottom: 12px;
  position: relative;
}

.prize-amount {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 900;
  font-family: var(--font-mono);
  letter-spacing: -0.03em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
  position: relative;
}

.prize-sub {
  font-size: 14px;
  color: var(--text-secondary);
  position: relative;
}

.countdown-container {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 28px;
  position: relative;
}

.countdown-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.countdown-value {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  font-size: 28px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-primary);
}

.countdown-label {
  margin-top: 6px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.countdown-sep {
  display: flex;
  align-items: center;
  font-size: 28px;
  font-weight: 800;
  color: var(--text-muted);
  padding-bottom: 20px;
}

/* ── Winner Bar ─────────────────────────────────────────── */
.winner-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  margin-top: 20px;
  position: relative;
}

.winner-bar-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 600;
}

.winner-address {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-accent);
}

.winner-bar .claim-mini-btn {
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  color: white;
  border: none;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.winner-bar .claim-mini-btn:hover {
  transform: scale(1.04);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

.winner-bar .claim-mini-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* ── Grid Layouts ───────────────────────────────────────── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 32px;
}

@media (max-width: 768px) {
  .two-col { grid-template-columns: 1fr; }
  .countdown-value { width: 56px; height: 56px; font-size: 22px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}

/* ── Forms ──────────────────────────────────────────────── */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 15px;
  outline: none;
  transition: all var(--transition-fast);
}

.form-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

.input-with-max {
  position: relative;
}

.input-max-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  color: var(--text-accent);
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.input-max-btn:hover {
  background: rgba(99, 102, 241, 0.2);
}

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  border: none;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
  width: 100%;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 2px 12px rgba(99, 102, 241, 0.2);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(99, 102, 241, 0.3);
}

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

.btn-primary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-default);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-accent);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
  width: auto;
}

/* ── Tranche Progress ───────────────────────────────────── */
.tranche-progress {
  margin-bottom: 20px;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  margin-bottom: 8px;
}

.progress-header span:first-child {
  color: var(--text-secondary);
  font-weight: 600;
}

.progress-header span:last-child {
  color: var(--text-accent);
  font-family: var(--font-mono);
  font-weight: 500;
}

.progress-bar {
  height: 8px;
  background: var(--bg-surface);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
  min-width: 2px;
}

/* ── Yield Table ────────────────────────────────────────── */
.yield-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

.yield-table th {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.yield-table td {
  padding: 12px;
  font-size: 14px;
  border-bottom: 1px solid var(--border-subtle);
}

.yield-table tr:last-child td {
  border-bottom: none;
}

.yield-table td.mono {
  font-family: var(--font-mono);
  font-size: 13px;
}

.yield-amt-positive {
  color: var(--success);
}

.yield-amt-zero {
  color: var(--text-muted);
}

/* ── Claim Yield Button (in table) ──────────────────────── */
.claim-yield-btn {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  color: white;
  border: none;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.claim-yield-btn:hover {
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.claim-yield-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* ── Toast / Notifications ──────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  font-size: 14px;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  animation: toast-in 0.3s ease-out;
  max-width: 380px;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.info { border-left: 3px solid var(--accent-primary); }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(16px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── Docs Page ──────────────────────────────────────────── */
.docs-content {
  padding: 48px 0 80px;
}

.docs-content h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 16px;
  margin-top: 48px;
  letter-spacing: -0.02em;
}

.docs-content h2:first-of-type {
  margin-top: 0;
}

.docs-content h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  margin-top: 32px;
  color: var(--text-accent);
}

.docs-content p, .docs-content li {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 12px;
}

.docs-content ul, .docs-content ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.docs-content code {
  font-family: var(--font-mono);
  background: var(--bg-surface);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--text-accent);
}

.docs-content .info-box {
  background: rgba(99, 102, 241, 0.06);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 24px 0;
}

.docs-content .info-box p {
  color: var(--text-primary);
  margin-bottom: 0;
}

.docs-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0;
}

.docs-flow-step {
  flex: 1;
  min-width: 180px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
}

.docs-flow-step .step-num {
  width: 32px;
  height: 32px;
  background: var(--accent-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
  color: white;
  margin: 0 auto 12px;
}

.docs-flow-step h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 6px;
}

.docs-flow-step p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* ── Referral Page ──────────────────────────────────────── */
.referral-card {
  max-width: 600px;
  margin: 0 auto;
}

.referral-url-box {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.referral-url {
  flex: 1;
  padding: 12px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-accent);
  font-family: var(--font-mono);
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.copy-btn {
  padding: 12px 20px;
  border-radius: var(--radius-md);
  background: var(--accent-gradient);
  color: white;
  border: none;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  transform: scale(1.03);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

.referral-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 24px;
}

/* ── Sections ───────────────────────────────────────────── */
.section {
  margin-bottom: 32px;
}

.section-title {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 16px;
}

/* ── Footer ─────────────────────────────────────────────── */
.footer {
  text-align: center;
  padding: 40px 0;
  border-top: 1px solid var(--border-subtle);
  margin-top: 60px;
}

.footer p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ── Skeleton Loader ────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg,
    var(--bg-surface) 25%, rgba(148, 163, 184, 0.06) 50%, var(--bg-surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

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

/* ── Connected Badge ────────────────────────────────────── */
.network-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--success);
  margin-left: 8px;
}

.network-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
}

/* ── Empty State ────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}

.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  opacity: 0.3;
}

.empty-state p {
  font-size: 14px;
}

/* ── Mobile Nav Toggle ──────────────────────────────────── */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    padding: 16px;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .hero h1 { font-size: 1.8rem; }
  .prize-card { padding: 24px; }
  .referral-url-box { flex-direction: column; }
}