:root{--bg-dark:#0f1115;--bg-card:#181b21;--bg-hover:#21252d;--border:#2a2e37;--primary:#3b82f6;--text-main:#f1f5f9;--text-muted:#94a3b8;--sidebar-width:260px}*,:after,:before{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--bg-dark);color:var(--text-main);line-height:1.5}.login-container{display:flex;min-height:100vh;align-items:center;justify-content:center;padding:20px}.login-card{background:var(--bg-card);padding:40px;border-radius:16px;border:1px solid var(--border);width:100%;max-width:400px;box-shadow:0 20px 40px rgba(0,0,0,.4)}.login-title{font-size:1.5rem;font-weight:700;margin-bottom:8px;text-align:center}.login-subtitle{color:var(--text-muted);text-align:center;margin-bottom:24px;font-size:.9rem}.login-input{width:100%;padding:12px 16px;background:var(--bg-dark);border:1px solid var(--border);color:white;border-radius:8px;margin-bottom:16px;font-size:1rem;transition:border-color .2s}.login-input:focus{outline:none;border-color:var(--primary)}.login-btn{width:100%;padding:12px;background:var(--primary);color:white;border:none;border-radius:8px;font-weight:600;font-size:1rem;cursor:pointer;transition:background .2s}.login-btn:hover{background:#2563eb}.admin-layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-width);background:var(--bg-card);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0}.sidebar-header{padding:24px;border-bottom:1px solid var(--border)}.sidebar-logo{font-size:1.25rem;font-weight:800;letter-spacing:-.02em}.sidebar-logo span{color:var(--primary)}.sidebar-nav{padding:20px 12px;display:flex;flex-direction:column;gap:8px}.sidebar-link{display:block;padding:12px 16px;border-radius:8px;color:var(--text-muted);text-decoration:none;font-weight:500;transition:all .2s}.sidebar-link.active,.sidebar-link:hover{background:var(--bg-hover);color:var(--text-main)}.admin-main{flex:1 1;margin-left:var(--sidebar-width);padding:40px}.page-header{margin-bottom:32px}.page-title{font-size:1.8rem;font-weight:700}.page-desc{color:var(--text-muted);margin-top:4px}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:24px}