:root{--nav:#0b1d2b;--blue:#1174d4;--cyan:#12a7c7;--ink:#17212b;--muted:#667585;--line:#e1e8ef;--bg:#f3f6f9;--white:#fff;--radius:16px;--shadow:0 8px 30px rgba(20,42,63,.07)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,Segoe UI,Arial,sans-serif}.sidebar{position:fixed;inset:0 auto 0 0;width:245px;background:linear-gradient(180deg,#071925,#102f43);padding:26px 18px;color:#fff;z-index:20}.brand{display:flex;align-items:center;gap:12px;color:#fff;text-decoration:none;margin:0 8px 35px}.brand>span,.auth-logo{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:linear-gradient(135deg,var(--blue),var(--cyan));font-weight:900}.brand strong{line-height:1.05;font-size:18px}.brand small{font-weight:500;color:#85d8e9}.sidebar nav{display:flex;flex-direction:column;gap:7px}.sidebar nav a{padding:12px 14px;border-radius:10px;color:#c9d8e2;text-decoration:none;font-size:14px}.sidebar nav 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