:root{
  --navy:#0a2540;
  --navy-700:#0d2e4d;
  --blue:#1f6feb;
  --blue-600:#1456c4;
  --green:#1a8754;
  --red:#c0392b;
  --bg:#f4f6f9;
  --card:#ffffff;
  --text:#1a2433;
  --muted:#6b7785;
  --border:#e3e8ef;
  --radius:14px;
  --shadow:0 6px 24px rgba(10,37,64,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:10px;font-weight:600;font-size:15px;transition:.15s}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-600)}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.4)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-block{width:100%}
.container{max-width:1180px;margin:0 auto;padding:0 24px}

/* ---------- Top nav ---------- */
.nav{position:sticky;top:0;z-index:20;background:var(--navy);color:#fff}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;letter-spacing:.3px}
.brand-mark{width:32px;height:32px;border-radius:8px;background:linear-gradient(135deg,var(--blue),#43c6ac);display:flex;align-items:center;justify-content:center;font-weight:800}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{font-size:15px;color:#cdd7e4}
.nav-links a:hover{color:#fff}

/* ---------- Hero / landing ---------- */
.hero{background:linear-gradient(160deg,var(--navy) 0%,var(--navy-700) 55%,#10395f 100%);color:#fff;padding:84px 0 96px}
.hero-grid{display:grid;grid-template-columns:1fr;gap:48px;align-items:center}
.hero h1{font-size:48px;line-height:1.1;font-weight:800;margin-bottom:18px}
.hero p.lead{font-size:18px;color:#cfdcec;margin-bottom:30px;max-width:520px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:20px;padding:28px;backdrop-filter:blur(6px)}
.hero-card h3{font-size:14px;text-transform:uppercase;letter-spacing:1px;color:#9fb3c8;margin-bottom:6px}
.hero-card .amount{font-size:38px;font-weight:800;margin-bottom:18px}
.hero-card .row{display:flex;justify-content:space-between;padding:12px 0;border-top:1px solid rgba(255,255,255,.12);font-size:15px;color:#dbe6f1}

.features{padding:72px 0}
.section-title{text-align:center;margin-bottom:46px}
.section-title h2{font-size:32px;font-weight:800}
.section-title p{color:var(--muted);margin-top:8px}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.feature .ico{width:48px;height:48px;border-radius:12px;background:#eaf2ff;color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.feature h3{font-size:18px;margin-bottom:8px}
.feature p{color:var(--muted);font-size:15px}

.cta-band{background:var(--blue);color:#fff;text-align:center;padding:60px 0}
.cta-band h2{font-size:30px;margin-bottom:10px}
.cta-band p{color:#dbe9ff;margin-bottom:24px}

.footer{background:var(--navy);color:#9fb3c8;padding:40px 0;font-size:14px;text-align:center}

/* ---------- Auth / login ---------- */
.auth{min-height:calc(100vh - 68px);display:flex;align-items:center;justify-content:center;padding:40px 24px;background:linear-gradient(160deg,#eef3fa,#f7f9fc)}
.auth-card{background:var(--card);width:100%;max-width:420px;border-radius:18px;box-shadow:var(--shadow);padding:38px 34px;border:1px solid var(--border)}
.auth-card h2{font-size:26px;margin-bottom:6px}
.auth-card .sub{color:var(--muted);margin-bottom:26px;font-size:15px}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:7px}
.field input{width:100%;padding:13px 14px;border:1px solid var(--border);border-radius:10px;font-size:15px;outline:none;transition:.15s}
.field input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(31,111,235,.15)}
.hint{background:#eaf2ff;border:1px dashed #b9d3ff;color:#1456c4;font-size:13px;padding:10px 12px;border-radius:10px;margin-bottom:20px}
.error{background:#fdecea;color:var(--red);font-size:14px;padding:10px 12px;border-radius:10px;margin-bottom:16px;display:none}
.error.show{display:block}

/* ---------- Dashboard ---------- */
.dash{display:grid;grid-template-columns:240px 1fr;min-height:100vh}
.side{background:var(--navy);color:#cdd7e4;padding:24px 0;position:sticky;top:0;height:100vh}
.side.mobile-open{position:fixed;left:0;top:0;z-index:100;width:280px;height:100vh}
.side-overlay{position:fixed;left:0;top:0;width:100%;height:100%;background:rgba(0,0,0,.5);z-index:99;display:none}
.side-overlay.show{display:block}
.side .brand{padding:0 24px 26px;color:#fff}
.side nav a{display:flex;align-items:center;gap:12px;padding:13px 24px;font-size:15px;color:#cdd7e4;border-left:3px solid transparent}
.side nav a:hover{background:rgba(255,255,255,.05);color:#fff}
.side nav a.active{background:rgba(31,111,235,.18);color:#fff;border-left-color:var(--blue)}
.main{padding:28px 36px;overflow:auto}
.dash-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}
.dash-top h1{font-size:26px}
.dash-top .who{color:var(--muted);font-size:14px}
.avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--blue),#43c6ac);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.userbox{display:flex;align-items:center;gap:12px}
.logout{background:#fff;border:1px solid var(--border);padding:9px 16px;border-radius:10px;font-weight:600;font-size:14px}
.logout:hover{background:#f1f4f9}
.mobile-menu-btn{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.mobile-menu-btn span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:.3s}

.cards-row{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:26px}
.stat{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.stat .label{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
.stat .val{font-size:26px;font-weight:800;margin-top:8px}
.stat .delta{font-size:13px;margin-top:6px}
.delta.up{color:var(--green)}
.delta.down{color:var(--red)}

.grid-2{display:grid;grid-template-columns:1.5fr 1fr;gap:18px;margin-bottom:26px}
.panel{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.panel-head{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1px solid var(--border)}
.panel-head h3{font-size:17px}
.panel-head a{color:var(--blue);font-size:14px;font-weight:600}
.panel-body{padding:8px 22px 18px}

table{width:100%;border-collapse:collapse}
th{text-align:left;font-size:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);padding:12px 0;border-bottom:1px solid var(--border)}
td{padding:14px 0;border-bottom:1px solid var(--border);font-size:15px}
tr:last-child td{border-bottom:none}
.amt-neg{color:var(--red);font-weight:600}
.amt-pos{color:var(--green);font-weight:600}
.tag{display:inline-block;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600;background:#eef2f7;color:var(--muted)}

.acct{display:flex;align-items:center;justify-content:space-between;padding:16px 0;border-bottom:1px solid var(--border)}
.acct:last-child{border-bottom:none}
.acct .name{font-weight:600}
.acct .meta{font-size:13px;color:var(--muted)}
.acct .bal{font-weight:700}

.rewards{text-align:center;padding:10px 0 4px}
.rewards .pts{font-size:40px;font-weight:800;color:var(--blue)}
.rewards .lbl{color:var(--muted);font-size:14px}

.quick{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;padding:6px 0}
.quick a,.quick button{background:#eef4ff;color:var(--blue-600);border:1px solid #d6e4ff;padding:14px;border-radius:12px;font-weight:600;font-size:14px;text-align:center;display:block;text-decoration:none}
.quick a:hover,.quick button:hover{background:#e0ecff}

.acct-detail{padding:16px 0;border-bottom:1px solid var(--border)}
.acct-detail:last-child{border-bottom:none}
.acct-detail h4{font-size:16px;font-weight:700;margin-bottom:8px}
.acct-detail p{font-size:14px;color:var(--muted);margin-bottom:4px}

.reward-option{display:flex;align-items:center;gap:16px;padding:16px;border:1px solid var(--border);border-radius:12px;margin-bottom:12px}
.reward-option:last-child{margin-bottom:0}
.reward-icon{width:48px;height:48px;border-radius:12px;background:#eaf2ff;color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:24px;flex-shrink:0}
.reward-info{flex:1}
.reward-info h4{font-size:16px;font-weight:700;margin-bottom:4px}
.reward-info p{font-size:13px;color:var(--muted);margin-bottom:4px}
.reward-rate{font-size:12px;color:var(--blue);font-weight:600}

.setting-item{display:flex;align-items:center;justify-content:space-between;padding:16px 0;border-bottom:1px solid var(--border)}
.setting-item:last-child{border-bottom:none}
.setting-item h4{font-size:15px;font-weight:600;margin-bottom:4px}
.setting-item p{font-size:13px;color:var(--muted)}

.toggle{position:relative;display:inline-block;width:48px;height:26px}
.toggle input{opacity:0;width:0;height:0}
.slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background-color:#ccc;border-radius:26px;transition:.3s}
.slider:before{position:absolute;content:"";height:20px;width:20px;left:3px;bottom:3px;background-color:white;border-radius:50%;transition:.3s}
input:checked+.slider{background-color:var(--blue)}
input:checked+.slider:before{transform:translateX(22px)}

@media(max-width:900px){
  .hero-grid,.grid-2,.feature-grid,.cards-row{grid-template-columns:1fr}
  .dash{grid-template-columns:1fr}
  .side{display:none}
  .side.mobile-open{display:block}
  .nav-links{display:none}
  .mobile-menu-btn{display:flex}
  .hero h1{font-size:32px}
  .hero p.lead{font-size:16px}
  .hero{padding:60px 0}
  .features{padding:48px 0}
  .feature-grid{grid-template-columns:1fr}
  .dash-top{flex-direction:column;align-items:flex-start;gap:16px}
  .dash-top h1{font-size:22px}
  .cards-row{grid-template-columns:1fr 1fr}
  .panel-head h3{font-size:15px}
  .reward-option{flex-direction:column;align-items:flex-start;text-align:center}
  .reward-option button{width:100%;margin-top:12px}
  .setting-item{flex-direction:column;align-items:flex-start;gap:12px}
  .setting-item button{width:100%}
  .main{padding:20px 16px}
}

@media(max-width:600px){
  .cards-row{grid-template-columns:1fr}
  .container{padding:0 16px}
  .hero h1{font-size:28px}
  .hero p.lead{font-size:14px}
  .btn{padding:10px 18px;font-size:14px}
  .hero-cta{flex-direction:column}
  .hero-cta .btn{width:100%;justify-content:center}
  .panel-head{padding:14px 16px}
  .panel-body{padding:8px 16px 14px}
  .stat{padding:16px}
  .stat .val{font-size:22px}
  .feature{padding:20px}
  .nav{height:60px}
  .nav-inner{height:60px}
}

/* ---------- Modal & Notifications ---------- */
.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .3s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal{background:var(--card);border-radius:var(--radius);width:90%;max-width:480px;box-shadow:0 20px 60px rgba(0,0,0,.3);animation:slideUp .3s ease}
@keyframes slideUp{from{transform:translateY(30px);opacity:0}to{transform:translateY(0);opacity:1}}
.modal-header{padding:20px 24px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}
.modal-header h3{font-size:18px}
.modal-close{background:none;border:none;font-size:28px;color:var(--muted);cursor:pointer;padding:0;width:32px;height:32px;line-height:1}
.modal-close:hover{color:var(--text)}
.modal-body{padding:24px}
.modal-body p{color:var(--muted);margin-bottom:18px}
.modal-footer{padding:16px 24px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:12px}

.notification{position:fixed;top:24px;right:24px;background:var(--card);border-radius:var(--radius);padding:16px 20px;box-shadow:0 8px 32px rgba(0,0,0,.12);display:flex;align-items:center;gap:12px;min-width:320px;max-width:480px;z-index:2000;animation:slideIn .3s ease}
@keyframes slideIn{from{transform:translateX(400px);opacity:0}to{transform:translateX(0);opacity:1}}
.notification-success{border-left:4px solid var(--green)}
.notification-error{border-left:4px solid var(--red)}
.notification-info{border-left:4px solid var(--blue)}
.notification-warning{border-left:4px solid #f39c12}
.notification-icon{font-size:24px;flex-shrink:0}
.notification-message{flex:1;font-size:14px;font-weight:500}
.notification-close{background:none;border:none;font-size:20px;color:var(--muted);cursor:pointer;padding:0;line-height:1}
.notification-close:hover{color:var(--text)}

.tab-container{display:flex;gap:0;border-bottom:1px solid var(--border);margin-bottom:20px}
.tab-btn{background:none;border:none;padding:14px 20px;font-size:15px;font-weight:600;color:var(--muted);border-bottom:2px solid transparent;transition:.15s;cursor:pointer}
.tab-btn.active{color:var(--blue);border-bottom-color:var(--blue)}
.tab-btn:hover{color:var(--text)}
.tab-content{display:none}
.tab-content.active{display:block}

@media(max-width:600px){
  .modal{width:95%;max-width:360px}
  .modal-header{padding:16px 18px}
  .modal-body{padding:18px}
  .modal-footer{padding:14px 18px;flex-direction:column}
  .modal-footer .btn{width:100%}
  .notification{right:16px;top:16px;min-width:280px;max-width:calc(100vw - 32px)}
}