:root{
  --green:#2F9E44;
  --green-dark:#1B7A34;
  --green-deep:#0B1F14;
  --panel-dark:#123320;
  --bg-light:#F4FBF6;
  --card:#FFFFFF;
  --border:#E1EFE4;
  --text:#14231A;
  --muted:#5C7268;
  --amber:#E2A93A;
  --red:#E2673A;
  --radius:14px;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:'Inter',sans-serif;
  background:var(--bg-light);
  color:var(--text);
}
.mono{font-family:'JetBrains Mono',monospace;}
h1,h2,h3,h4,.brand,.btn-solid,.btn-outline{font-family:'Poppins',sans-serif;}
button{cursor:pointer;font-family:inherit;}
a{color:inherit;text-decoration:none;}

/* ===== Topbar ===== */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 48px;background:var(--green-deep);color:#fff;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;}
.brand-mark{
  width:36px;height:36px;border-radius:10px;background:linear-gradient(150deg,var(--green),var(--green-dark));
  display:flex;align-items:center;justify-content:center;font-size:18px;
}
.brand small{display:block;font-weight:500;font-size:10.5px;color:#9FD8AE;letter-spacing:.04em;}
.toplinks{display:flex;gap:30px;font-size:14px;color:#CFE9D6;}
.toplinks a:hover{color:#fff;}
.pill-btn{
  background:var(--green);color:#fff;border:none;padding:10px 20px;border-radius:999px;font-size:14px;font-weight:600;
  transition:filter .2s;
}
.pill-btn:hover{filter:brightness(1.1);}

/* ===== Hero ===== */
.hero{
  background:radial-gradient(900px 500px at 80% 20%, rgba(47,158,68,.25), transparent 60%), var(--green-deep);
  color:#fff;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;
  padding:70px 48px 90px;align-items:center;
}
.hero-copy h1{font-size:44px;line-height:1.15;margin:0 0 20px;font-weight:700;}
.hero-copy h1 span{color:var(--green);}
.hero-copy p{color:#B9D6C0;font-size:15.5px;line-height:1.6;max-width:460px;margin:0 0 30px;}
.hero-btns{display:flex;gap:14px;}
.btn-solid{background:var(--green);color:#fff;border:none;padding:13px 22px;border-radius:10px;font-weight:600;font-size:14.5px;}
.btn-solid:hover{filter:brightness(1.08);}
.btn-solid.small{padding:10px 18px;font-size:13.5px;}
.btn-solid.full{width:100%;}
.btn-outline{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.35);padding:13px 22px;border-radius:10px;font-weight:600;font-size:14.5px;}
.btn-outline:hover{border-color:var(--green);background:rgba(47,158,68,.12);}
.btn-outline.small{padding:9px 16px;font-size:13px;color:var(--text);border-color:var(--border);}

.hero-art{position:relative;display:flex;justify-content:center;align-items:center;height:340px;}
.plant-wrap{position:relative;width:260px;height:260px;display:flex;align-items:center;justify-content:center;}
.plant-glow{position:absolute;inset:0;border-radius:50%;background:radial-gradient(circle,rgba(47,158,68,.35),transparent 70%);}
.plant-icon{font-size:110px;position:relative;z-index:1;}
.sense{
  position:absolute;background:rgba(18,51,32,.9);border:1px solid rgba(47,158,68,.4);
  border-radius:12px;padding:8px 12px;font-size:11.5px;display:flex;flex-direction:column;align-items:center;gap:2px;
  box-shadow:0 8px 20px rgba(0,0,0,.3);
}
.sense b{font-family:'JetBrains Mono',monospace;font-size:12px;}
.s-temp{top:0;left:10px;}
.s-wifi{top:10px;right:0;}
.s-moist{bottom:30px;left:-20px;}
.s-light{top:60px;right:-30px;}
.s-ph{bottom:0;right:20px;}

/* ===== Why choose ===== */
.why{padding:70px 48px;text-align:center;}
.why h2{font-size:28px;margin:0 0 36px;}
.why-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;max-width:1200px;margin:0 auto;}
.why-card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:26px 18px;}
.ic-circle{
  width:46px;height:46px;border-radius:50%;background:rgba(47,158,68,.12);color:var(--green);
  display:flex;align-items:center;justify-content:center;margin:0 auto 14px;font-size:20px;
}
.why-card h4{margin:0 0 8px;font-size:15px;}
.why-card p{margin:0;font-size:12.5px;color:var(--muted);line-height:1.5;}

/* ===== How it works ===== */
.how{padding:20px 48px 70px;text-align:center;}
.how h2{font-size:28px;margin:0 0 36px;}
.how-grid{display:flex;align-items:flex-start;justify-content:center;gap:10px;max-width:1200px;margin:0 auto 36px;flex-wrap:wrap;}
.how-step{width:190px;}
.step-ic{
  width:52px;height:52px;border-radius:14px;background:rgba(47,158,68,.1);color:var(--green);
  display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-size:22px;
}
.how-step b{display:block;font-size:14px;margin-bottom:6px;}
.how-step p{margin:0;font-size:12px;color:var(--muted);line-height:1.5;}
.arrow{color:var(--border);font-size:22px;padding-top:16px;}
.overview-card{
  max-width:600px;margin:0 auto;background:var(--panel-dark);color:#fff;border-radius:16px;padding:28px 30px;
}
.overview-card b{font-size:16px;display:block;margin-bottom:8px;}
.overview-card p{color:#B9D6C0;font-size:13px;margin:0 0 18px;line-height:1.5;}

.foot{padding:26px 48px;background:var(--green-deep);color:#9FD8AE;display:flex;justify-content:space-between;align-items:center;font-size:13px;}
.foot .brand{color:#fff;}

/* ===== Auth Modal ===== */
.modal-overlay{
  display:none;position:fixed;inset:0;background:rgba(11,31,20,.7);z-index:50;
  align-items:center;justify-content:center;
}
.modal-overlay.open{display:flex;}
.modal-card{
  background:var(--card);border-radius:18px;padding:32px;width:380px;position:relative;
  box-shadow:0 30px 60px -20px rgba(0,0,0,.5);
}
.modal-close{position:absolute;top:16px;right:16px;background:none;border:none;font-size:16px;color:var(--muted);}
.auth-tabs{display:flex;background:var(--bg-light);border-radius:10px;padding:4px;margin-bottom:22px;}
.auth-tab{flex:1;background:none;border:none;padding:10px;border-radius:8px;font-weight:600;font-size:13.5px;color:var(--muted);}
.auth-tab.active{background:var(--green);color:#fff;}
.auth-panel{display:none;}
.auth-panel.active{display:block;}
.field{margin-bottom:16px;}
.field label{font-size:12.5px;color:var(--muted);display:block;margin-bottom:6px;}
.field input, .form-grid input, .form-grid select{
  width:100%;background:var(--bg-light);border:1px solid var(--border);color:var(--text);
  padding:11px 13px;border-radius:9px;font-size:14px;outline:none;
}
.field input:focus, .form-grid input:focus, .form-grid select:focus{border-color:var(--green);}
.auth-error{display:none;background:rgba(226,103,58,.1);border:1px solid rgba(226,103,58,.3);color:#c1502a;
  font-size:12.5px;padding:9px 12px;border-radius:8px;margin-bottom:14px;}
.switch-note{text-align:center;font-size:12.5px;color:var(--muted);margin-top:16px;}
.switch-note a{color:var(--green);font-weight:600;}

/* ===== App shell ===== */
#view-app{display:none;}
.app-shell{display:grid;grid-template-columns:230px 1fr;min-height:100vh;}
.sidebar{background:var(--panel-dark);color:#fff;padding:24px 16px;display:flex;flex-direction:column;gap:4px;}
.side-brand{display:flex;align-items:center;gap:10px;padding:6px 10px 22px;font-weight:700;}
.navitem{
  display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:10px;color:#B9D6C0;
  cursor:pointer;font-size:14px;border:1px solid transparent;transition:background .15s,color .15s;
}
.navitem .ic{width:18px;text-align:center;}
.navitem:hover{background:rgba(255,255,255,.06);color:#fff;}
.navitem.active{background:rgba(47,158,68,.25);color:#fff;border-color:rgba(47,158,68,.4);}
.side-foot{margin-top:auto;border-top:1px solid rgba(255,255,255,.1);padding-top:14px;}
.user-chip{font-size:13px;color:#fff;margin-bottom:10px;padding:0 4px;}
.logout-btn{width:100%;background:none;border:1px solid rgba(255,255,255,.2);color:#B9D6C0;padding:10px;border-radius:10px;font-size:13px;}
.logout-btn:hover{border-color:var(--red);color:#ffb199;}

.main{padding:28px 36px 60px;}
.main-head{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:26px;}
.main-head h1{font-size:23px;margin:0 0 4px;}
.main-head p{margin:0;color:var(--muted);font-size:13.5px;}
.live-chip{display:flex;align-items:center;gap:7px;font-size:12.5px;color:var(--green);}
.live-chip .dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 8px var(--green);animation:pulse 1.8s infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.4;}}

.panel-view{display:none;}
.panel-view.active{display:block;}

.kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px;}
.kpi{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:20px;}
.kpi .lbl{font-size:12px;color:var(--muted);}
.kpi b{display:block;font-size:27px;margin:8px 0 2px;font-family:'Poppins',sans-serif;}
.kpi .delta{font-size:11.5px;color:var(--muted);}
.kpi.green b{color:var(--green);}
.kpi.red b{color:var(--red);}
.kpi.amber b{color:var(--amber);}

.grid-2{display:grid;grid-template-columns:1.3fr 1fr;gap:20px;}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:22px;}
.card h3{font-size:15.5px;margin:0 0 16px;}

.plant-list{display:flex;flex-direction:column;gap:12px;max-height:340px;overflow:auto;}
.plant-item{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border);padding-bottom:12px;}
.plant-item:last-child{border:none;padding-bottom:0;}
.pi-left b{display:block;font-size:13.5px;}
.pi-left span{font-size:12px;color:var(--muted);}
.status-tag{font-size:11px;padding:4px 10px;border-radius:999px;font-weight:600;}
.status-tag.healthy{background:rgba(47,158,68,.12);color:var(--green);}
.status-tag.diseased{background:rgba(226,103,58,.12);color:var(--red);}
.empty-note{color:var(--muted);font-size:13px;}

.sensor-mini-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;}
.sensor-mini-grid.big{grid-template-columns:repeat(5,1fr);}
.sm-item{background:var(--bg-light);border:1px solid var(--border);border-radius:12px;padding:16px;text-align:center;}
.sm-item .ic{font-size:20px;display:block;margin-bottom:6px;}
.sm-item b{display:block;font-family:'JetBrains Mono',monospace;font-size:15px;}
.sm-item span{font-size:11px;color:var(--muted);}

.form-card{max-width:560px;}
.form-grid{display:grid;gap:16px;margin-bottom:6px;}
.form-grid label{font-size:12.5px;color:var(--muted);display:block;margin-bottom:7px;}
.hint{color:#B7A15A;font-size:11px;}
.leaf-preview{width:100%;max-height:220px;object-fit:cover;border-radius:10px;border:1px solid var(--border);}
.msg{font-size:13px;padding:10px 13px;border-radius:9px;margin-top:14px;display:none;}
.msg.ok{background:rgba(47,158,68,.1);color:var(--green);border:1px solid rgba(47,158,68,.3);}
.msg.err{background:rgba(226,103,58,.1);color:var(--red);border:1px solid rgba(226,103,58,.3);}

.solution-box{margin-top:20px;border:1px solid var(--border);border-radius:12px;padding:20px;background:var(--bg-light);display:none;}
.sol-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;}
.sol-tag{font-size:11.5px;font-weight:700;padding:5px 12px;border-radius:999px;background:rgba(226,103,58,.15);color:var(--red);}
.sol-tag.healthy{background:rgba(47,158,68,.15);color:var(--green);}
.solution-box h4{margin:0 0 8px;font-size:14.5px;}
.solution-box p{margin:0;font-size:13px;color:var(--muted);line-height:1.6;}

table{width:100%;border-collapse:collapse;font-size:13px;}
th{text-align:left;color:var(--muted);font-weight:600;font-size:11.5px;text-transform:uppercase;letter-spacing:.04em;padding:10px 12px;border-bottom:1px solid var(--border);}
td{padding:12px;border-bottom:1px solid var(--border);}
tr:last-child td{border:none;}
.empty-row td{text-align:center;color:var(--muted);padding:40px;}

@media(max-width:980px){
  .hero{grid-template-columns:1fr;}
  .why-grid{grid-template-columns:repeat(2,1fr);}
  .how-grid{flex-direction:column;align-items:center;}
  .arrow{display:none;}
  .kpis{grid-template-columns:repeat(2,1fr);}
  .grid-2{grid-template-columns:1fr;}
  .app-shell{grid-template-columns:1fr;}
  .sidebar{display:none;}
  .sensor-mini-grid.big{grid-template-columns:repeat(2,1fr);}
}