:root{--color-primary: #2563eb;--color-primary-dark: #1d4ed8;--color-primary-light: #3b82f6;--color-accent: #f59e0b;--color-bg: #0f0f23;--color-bg-card: #1a1a2e;--color-bg-input: #16213e;--color-bg-hover: #1e2a4a;--color-border: #2d3748;--color-border-focus: #4a90d9;--color-text: #e2e8f0;--color-text-secondary: #94a3b8;--color-text-muted: #64748b;--color-text-inverse: #0f0f23;--color-success: #22c55e;--color-error: #ef4444;--color-warning: #f59e0b;--color-info: #3b82f6;--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--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;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.5rem;--space-8: 2rem;--space-10: 2.5rem;--space-12: 3rem;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .3);--sidebar-width: 260px;--header-height: 60px;--max-content-width: 1200px;--transition-fast: .15s ease;--transition-normal: .25s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-family);font-size:var(--font-size-base);color:var(--color-text);background-color:var(--color-bg);line-height:1.6;min-height:100vh}a{color:var(--color-primary-light);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto}.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}input,textarea,select,button{font-family:inherit;font-size:inherit}input[type=text],input[type=email],input[type=password],input[type=tel],input[type=url],textarea,select{width:100%;padding:var(--space-3) var(--space-4);background:var(--color-bg-input);border:1px solid var(--color-border);border-radius:var(--radius-md);color:var(--color-text);transition:border-color var(--transition-fast)}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--color-border-focus)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-3) var(--space-6);border:none;border-radius:var(--radius-md);font-weight:600;cursor:pointer;transition:background-color var(--transition-fast),opacity var(--transition-fast)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--color-primary-dark)}.btn-secondary{background:transparent;color:var(--color-text);border:1px solid var(--color-border)}.btn-secondary:hover:not(:disabled){background:var(--color-bg-hover)}.btn-danger{background:var(--color-error);color:#fff}.btn-full{width:100%}.card{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-6)}.form-group{margin-bottom:var(--space-4)}.form-group label{display:block;margin-bottom:var(--space-2);font-size:var(--font-size-sm);font-weight:500;color:var(--color-text-secondary)}.alert{padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);font-size:var(--font-size-sm);margin-bottom:var(--space-4)}.alert-error{background:#ef444426;color:var(--color-error);border:1px solid rgba(239,68,68,.3)}.alert-success{background:#22c55e26;color:var(--color-success);border:1px solid rgba(34,197,94,.3)}.alert-info{background:#3b82f626;color:var(--color-info);border:1px solid rgba(59,130,246,.3)}