:root{--font-family-sans: "Roboto", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;--color-primary: #2563eb;--color-primary-dark: #1e40af;--color-primary-light: #3b82f6;--color-secondary: #64748b;--color-success: #10b981;--color-danger: #ef4444;--color-warning: #f59e0b;--bg-primary: #ffffff;--bg-secondary: #f8fafc;--bg-tertiary: #f1f5f9;--border-light: #e2e8f0;--border-medium: #cbd5e1;--border-dark: #94a3b8;--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #64748b;--text-light: #94a3b8;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 12px;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04)}html,body{height:100%;font-family:var(--font-family-sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:var(--text-primary);background-color:var(--bg-secondary)}input,textarea,select,button,label,a{font-family:var(--font-family-sans)}*{box-sizing:border-box}img{max-width:100%;height:auto}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.5rem .9rem;border-radius:8px;font-weight:600;font-size:.95rem;line-height:1;border:1px solid transparent;cursor:pointer;transition:transform .12s ease,box-shadow .16s ease,opacity .12s ease;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.btn:focus{outline:none;box-shadow:0 0 0 4px #3b82f61f}.btn-primary{background:linear-gradient(180deg,var(--color-primary),var(--color-primary-dark));color:#fff;border-color:#00000014;box-shadow:0 6px 18px #1e40af1f}.btn-primary:hover{transform:translateY(-2px)}.btn-secondary{background:var(--bg-primary);color:var(--text-primary);border:1px solid var(--border-light);box-shadow:var(--shadow-sm)}.btn-secondary:hover{transform:translateY(-1px)}.btn-outline{background:transparent;color:var(--color-primary);border:1px solid rgba(37,99,235,.2)}.btn-danger{background:linear-gradient(180deg,var(--color-danger),#b91c1c);color:#fff;border-color:#0000000f}.btn-sm{padding:.28rem .5rem;font-size:.85rem;border-radius:var(--radius-md)}.btn-block{width:100%;display:flex}.btn .btn-icon{display:inline-flex;align-items:center;justify-content:center}