:root{--color-primary: #1B2A4A;--color-primary-mid: #253559;--color-accent: #3DAA72;--color-accent-dark: #2E8A5A;--color-highlight-bg: #E8F5EE;--color-warning: #E07B39;--color-surface: #FFFFFF;--color-bg-app: #F8FAFB;--color-border: #EEF1F5;--color-border-dark: #CBD5E1;--color-text-main: #1B2A4A;--color-text-sub: #475569;--color-text-muted: #94A3B8;--color-danger: #EF4444;--color-star-gold: #F59E0B;--color-star-empty: #CBD5E1;--font-family-base: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 1.875rem;--radius-xs: 4px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-card: 0 4px 20px -2px rgba(27, 42, 74, .08);--shadow-md: 0 8px 30px rgba(0, 0, 0, .12);--shadow-modal: 0 20px 25px -5px rgba(0, 0, 0, .2), 0 10px 10px -5px rgba(0, 0, 0, .04);--shadow-green-glow: 0 8px 24px rgba(61, 170, 114, .18), 0 2px 8px rgba(61, 170, 114, .12);--shadow-red-glow: 0 8px 24px rgba(239, 68, 68, .18), 0 2px 8px rgba(239, 68, 68, .12);--transition-fast: .15s ease;--transition-normal: .25s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}body{font-family:var(--font-family-base);background-color:#e2e8f0;color:var(--color-text-main);line-height:1.5;min-height:100vh;display:flex;justify-content:center;align-items:center;padding:20px 0}#root{width:100%;max-width:100vw;display:flex;justify-content:center;align-items:center}.container-qr-landing{width:100%;max-width:480px;min-height:auto;background-color:var(--color-bg-app);border-radius:var(--radius-xl);display:flex;flex-direction:column;position:relative;overflow:hidden;transition:box-shadow .35s cubic-bezier(.4,0,.2,1),border-color .35s cubic-bezier(.4,0,.2,1)}.shadow-theme-green{box-shadow:var(--shadow-green-glow);border:1px solid rgba(61,170,114,.25)}.shadow-theme-red{box-shadow:var(--shadow-red-glow);border:1px solid rgba(239,68,68,.25)}@media (max-width: 520px){body{padding:0;background-color:var(--color-bg-app)}.container-qr-landing{border-radius:0;min-height:100vh;box-shadow:none;border:none}}.demo-header-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;background-color:#1b2a4a0f;border:1px solid rgba(27,42,74,.1);border-radius:var(--radius-full);font-size:var(--font-size-xs);font-weight:600;color:var(--color-primary);letter-spacing:.02em}.demo-header-badge .dot{width:6px;height:6px;border-radius:50%;background-color:var(--color-accent)}.presenter-reset-btn{position:absolute;top:12px;right:12px;z-index:50;display:flex;align-items:center;gap:4px;padding:6px 10px;background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-full);font-size:var(--font-size-xs);font-weight:500;color:var(--color-text-sub);cursor:pointer;box-shadow:var(--shadow-sm);transition:var(--transition-fast)}.presenter-reset-btn:hover{background-color:var(--color-highlight-bg);color:var(--color-accent-dark);border-color:var(--color-accent)}.btn-primary{width:100%;padding:14px 20px;background-color:var(--color-accent);color:#fff;border:none;border-radius:var(--radius-md);font-size:var(--font-size-base);font-weight:600;cursor:pointer;transition:var(--transition-fast);display:inline-flex;justify-content:center;align-items:center;gap:8px}.btn-primary:hover{background-color:var(--color-accent-dark);transform:translateY(-1px)}.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none!important;pointer-events:none}.btn-primary:active{transform:translateY(0)}.btn-secondary{width:100%;padding:12px 18px;background-color:var(--color-surface);color:var(--color-primary);border:1px solid var(--color-border-dark);border-radius:var(--radius-md);font-size:var(--font-size-sm);font-weight:600;cursor:pointer;transition:var(--transition-fast)}.btn-secondary:hover{background-color:#f1f5f9}.card{background-color:var(--color-surface);border-radius:var(--radius-lg);border:1px solid var(--color-border);box-shadow:var(--shadow-card);padding:16px}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:fadeIn .3s ease forwards}