:root{--color-bg:#0b0f14;--color-surface:#131a22;--color-border:#232c37;--color-text:#e6edf3;--color-muted:#8b98a5;--color-accent:#3fb950;--color-danger:#f85149;font-family:system-ui,-apple-system,Segoe UI,Tahoma,sans-serif}body{margin:0;background:var(--color-bg);color:var(--color-text)}.app-shell{min-height:100vh}[dir=rtl]{font-family:Vazirmatn,system-ui,Tahoma,sans-serif}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;padding:24px;max-width:420px;margin:10vh auto}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}input{background:var(--color-bg);border:1px solid var(--color-border);color:var(--color-text);border-radius:8px;padding:10px 12px;font-size:14px}button{background:var(--color-accent);color:#04120a;border:none;border-radius:8px;padding:10px 16px;font-weight:600;cursor:pointer;width:100%}.error-text{color:var(--color-danger);font-size:13px;margin-top:8px}