:root{--blue-50:#f2faff;--blue-100:#dff4ff;--blue-200:#bde9ff;--blue-300:#8fdbff;--blue-400:#55c9ff;--blue-500:#1daef2;--blue-600:#0b90d5;--blue-700:#0872ae;--background:#f5fbff;--surface:#fff;--text:#16324a;--muted:#5f7c91;--success:#15966f;--danger:#c2415b;--shadow:0 18px 45px rgba(8,114,174,.12)}*{box-sizing:border-box}html,body{max-width:100%;overflow-x:hidden}body{margin:0;background:radial-gradient(circle at 90% 5%,var(--blue-100),transparent 28%),var(--background);color:var(--text);font:16px/1.5 Inter,ui-rounded,"Segoe UI",sans-serif}button,input{font:inherit}.topbar{min-height:78px;padding:14px clamp(18px,4vw,54px);display:flex;justify-content:space-between;align-items:center;background:rgba(255,255,255,.9);border-bottom:1px solid var(--blue-100);backdrop-filter:blur(12px)}.brand{display:flex;gap:12px;align-items:center;color:var(--text);text-decoration:none;font-weight:900}.brand small,.userbox small{display:block;color:var(--muted);font-size:12px;font-weight:600}.brand-mark{display:grid;place-items:center;width:48px;height:48px;border-radius:16px;color:#fff;background:linear-gradient(135deg,var(--blue-400),var(--blue-700));box-shadow:0 10px 25px #1daef244;font-size:25px}.userbox{display:flex;gap:18px;align-items:center;text-align:right}.link-button{border:0;background:none;color:var(--blue-700);font-weight:800;cursor:pointer}.page{width:min(1120px,calc(100% - 32px));margin:34px auto 70px}.card{min-width:0;background:var(--surface);border:1px solid var(--blue-100);border-radius:24px;box-shadow:var(--shadow);padding:24px}.login-wrap{min-height:calc(100vh - 165px);display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,440px);gap:40px;align-items:center}.login-art{min-width:0;min-height:440px;position:relative;border-radius:40px;background:linear-gradient(145deg,var(--blue-300),var(--blue-600));overflow:hidden;display:flex;justify-content:center;align-items:center;gap:24px;color:#fff;font-size:70px;font-weight:900}.login-art span{opacity:.3;transform:rotate(-12deg)}.placeholder-orbit{position:absolute;display:grid;place-items:center;width:140px;height:140px;border-radius:50%;background:#fff;color:var(--blue-600);box-shadow:0 20px 60px #07557c55}.login-card{padding:38px}.eyebrow{margin:0 0 8px;color:var(--blue-700);font-size:12px;font-weight:900;letter-spacing:.16em}.login-card h1,.hero h1{font-size:clamp(32px,5vw,52px);line-height:1.05;margin:0 0 14px}.muted,.hero p,.feature p,.student-card p{color:var(--muted)}label{display:block;font-weight:800;margin:18px 0 0}input{width:100%;min-height:50px;margin-top:7px;border:1px solid #b8d9e9;border-radius:14px;padding:0 14px;color:var(--text);background:#fff}input:focus{outline:3px solid #55c9ff55;border-color:var(--blue-600)}.btn{display:inline-flex;justify-content:center;align-items:center;min-height:48px;padding:0 20px;border:0;border-radius:14px;text-decoration:none;font-weight:900;cursor:pointer}.btn.primary{width:100%;margin-top:22px;background:linear-gradient(135deg,var(--blue-500),var(--blue-700));color:#fff}.btn.secondary{background:var(--blue-100);color:var(--blue-700)}.hero{display:flex;justify-content:space-between;align-items:center;padding:38px;border-radius:32px;background:linear-gradient(135deg,#fff,var(--blue-100));border:1px solid var(--blue-200);margin-bottom:26px}.hero.compact{padding:28px}.hero.compact h1{font-size:36px}.hero-bubble{display:grid;place-items:center;width:110px;height:110px;border-radius:32px;background:linear-gradient(135deg,var(--blue-400),var(--blue-700));color:#fff;font-size:44px;transform:rotate(8deg)}.grid{display:grid;gap:20px}.cards{grid-template-columns:repeat(3,minmax(0,1fr))}.feature .icon{display:grid;place-items:center;width:54px;height:54px;border-radius:18px;background:var(--blue-100);color:var(--blue-700);font-size:26px}.feature h2{margin:18px 0 6px}.search-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px}.search-row input{margin:0}.search-row .btn{margin:0}.student-list{display:grid;gap:14px;margin-top:20px}.student-card{display:flex;justify-content:space-between;align-items:center;gap:20px}.student-card h2{margin:5px 0}.student-code{font-weight:900;color:var(--blue-700)}.badge{display:inline-flex;padding:8px 12px;border-radius:99px;font-size:12px;font-weight:900}.badge.success{background:#e1f8ef;color:#087354}.alert{padding:14px 18px;border-radius:14px;margin-bottom:18px;background:var(--blue-100)}.alert.error{background:#ffe7ec;color:#9d2841}.alert.success{background:#e1f8ef;color:#087354}.empty{text-align:center;margin-top:20px}@media(max-width:760px){.topbar{align-items:flex-start}.brand small{display:none}.userbox>span{display:none}.page{width:min(100% - 22px,1120px);margin-top:18px}.login-wrap{grid-template-columns:minmax(0,1fr)}.login-art{display:none}.login-card{padding:26px}.cards{grid-template-columns:minmax(0,1fr)}.hero{padding:24px}.hero-bubble{width:72px;height:72px}.search-row{grid-template-columns:minmax(0,1fr)}.student-card{align-items:flex-start;flex-direction:column}.student-action,.student-action form,.student-action .btn{width:100%}}