:root{--bg:#eef1ed;--surface:#fff;--text:#111813;--muted:#6c766f;--line:#dce3dc;--dark:#132019;--green:#9bd43b;--green2:#77b900;--danger:#b53b3b;--shadow:0 12px 34px rgba(20,35,25,.09)}*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text)}button,input,select,textarea{font:inherit}.app-shell{display:grid;grid-template-columns:260px 1fr;min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;background:var(--dark);color:#fff;padding:24px 18px;display:flex;flex-direction:column}.brand{display:flex;gap:12px;align-items:center;margin-bottom:30px}.brand-mark{width:46px;height:54px;display:grid;place-items:center;flex:0 0 auto}.brand-mark img{display:block;width:44px;height:54px;object-fit:contain}.brand strong,.brand span{display:block}.brand span{font-size:12px;color:#b9c8bf;margin-top:3px}.sidebar nav{display:grid;gap:7px}.nav-btn{border:0;background:transparent;color:#cbd6cf;text-align:left;padding:12px 14px;border-radius:10px;cursor:pointer}.nav-btn:hover,.nav-btn.active{background:#24342b;color:#fff}.nav-btn.active{box-shadow:inset 3px 0 var(--green)}.sidebar-note{margin-top:auto;font-size:12px;line-height:1.5;color:#aebcb3;border-top:1px solid #34453b;padding-top:18px}.workspace{min-width:0}.topbar{display:flex;align-items:center;justify-content:space-between;padding:24px 32px;background:rgba(255,255,255,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.topbar h1{font-size:24px;margin:0 0 5px}.topbar p{margin:0;color:var(--muted);font-size:13px}.top-actions{display:flex;gap:10px}.btn{border:0;border-radius:9px;padding:10px 16px;font-weight:700;cursor:pointer}.btn.primary{background:var(--green);color:#142016}.btn.secondary{background:#edf2ed;color:#253229;border:1px solid #d3ddd5}.btn.ghost{background:transparent;color:inherit}.tab{display:none;padding:28px 32px 50px}.tab.active{display:block}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.span-2{grid-column:span 2}.panel{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:var(--shadow)}.panel-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;margin-bottom:18px}.panel-head h2{margin:0;font-size:18px}.panel-head p{margin:5px 0 0;color:var(--muted);font-size:13px}.eyebrow{display:inline-block;font-weight:900;color:var(--green2);font-size:11px;letter-spacing:.1em;margin-bottom:5px}.pill{background:#eff6e5;color:#456719;border:1px solid #d9eabd;padding:6px 9px;border-radius:999px;font-size:11px;font-weight:700}.pill.warn{background:#fff3dc;color:#8a5a0b;border-color:#f0d49a}.grid{display:grid;gap:14px}.grid.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}label{display:flex;flex-direction:column;gap:7px;font-size:12px;font-weight:700;color:#3a473e}input,select,textarea{width:100%;border:1px solid #ced8d0;border-radius:9px;background:#fbfcfb;padding:10px 11px;color:#152019;outline:none}input:focus,select:focus,textarea:focus{border-color:var(--green2);box-shadow:0 0 0 3px rgba(155,212,59,.18)}input[readonly]{background:#f0f3f0;color:#677168}.muted,small,.hint{font-size:11px;color:var(--muted);font-weight:400}.mt{margin-top:14px}.calc-card{border:1px solid #dbe4dc;background:#f7faf6;border-radius:12px;padding:14px;display:flex;flex-direction:column;gap:6px}.calc-card span{font-size:11px;color:var(--muted)}.calc-card strong{font-size:20px}.rounding-note{margin-top:13px;padding:11px 13px;border-radius:10px;background:#fff8df;border:1px solid #f1dda0;font-size:12px;color:#72520d}.hidden{display:none!important}.switch{flex-direction:row;align-items:center;gap:9px;cursor:pointer}.switch input{display:none}.switch span{width:38px;height:22px;border-radius:99px;background:#c9d0ca;position:relative}.switch span:after{content:"";position:absolute;width:16px;height:16px;border-radius:50%;background:#fff;left:3px;top:3px;transition:.2s}.switch input:checked+span{background:var(--green2)}.switch input:checked+span:after{left:19px}.disabled-block{opacity:.45;pointer-events:none}.summary-panel{background:linear-gradient(135deg,#142119,#253c2d);color:#fff;border:0}.summary-panel .panel-head h2{color:#fff}.summary-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.summary-grid>div{padding:17px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.1);border-radius:12px}.summary-grid span,.summary-grid strong{display:block}.summary-grid span{font-size:11px;color:#c0cec5;margin-bottom:8px}.summary-grid strong{font-size:18px}.summary-grid .accent{background:var(--green);color:#132019}.summary-grid .accent span{color:#31431d}.summary-panel details{margin-top:15px}.summary-panel summary{cursor:pointer;color:#c9d7ce}.breakdown{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:12px}.breakdown div{display:flex;justify-content:space-between;padding:8px 10px;background:rgba(255,255,255,.06);border-radius:8px;font-size:12px}.settings-table{overflow:auto}.settings-table table,.codes-table table{width:100%;border-collapse:collapse}.settings-table th,.settings-table td,.codes-table th,.codes-table td{padding:10px;border-bottom:1px solid var(--line);text-align:left;font-size:12px}.settings-table input{min-width:90px}.icon-btn{border:0;background:#f5e8e8;color:var(--danger);border-radius:7px;padding:7px 10px;cursor:pointer;font-size:16px}.icon-btn:hover{background:#f0d8d8;opacity:.8}.info-box{margin-top:18px;background:#f4f8f0;border:1px solid #dfead5;padding:16px;border-radius:12px;font-size:13px;line-height:1.6}.info-box code,.codes-table code{background:#e9eee9;padding:2px 5px;border-radius:5px}.design-card,.history-card{border:1px solid var(--line);padding:15px;border-radius:12px;margin-bottom:10px;display:flex;justify-content:space-between;gap:15px;align-items:center}.design-card p,.history-card p{margin:5px 0 0;color:var(--muted);font-size:12px}.modal{position:fixed;inset:0;background:#333;z-index:100;display:flex;flex-direction:column}.modal-bar{height:64px;background:#142119;color:#fff;display:flex;justify-content:space-between;align-items:center;padding:0 18px}.modal-bar>div{display:flex;align-items:center;gap:10px}.modal-bar span{color:#aebbb2;font-size:12px}.modal iframe{width:100%;flex:1;border:0;background:#777}.empty{padding:26px;text-align:center;color:var(--muted);border:1px dashed var(--line);border-radius:12px}@media(max-width:1100px){.grid.cols-4{grid-template-columns:repeat(2,1fr)}.summary-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:780px){.app-shell{grid-template-columns:1fr}.sidebar{position:static;height:auto}.sidebar nav{grid-template-columns:repeat(2,1fr)}.topbar{position:static;padding:18px;align-items:flex-start;gap:14px}.tab{padding:18px}.form-grid,.grid.cols-2,.grid.cols-3,.grid.cols-4{grid-template-columns:1fr}.span-2{grid-column:auto}.summary-grid{grid-template-columns:1fr}.top-actions{flex-direction:column}}
.energy-mode{border:0;padding:0;margin:0 0 18px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.energy-mode legend{font-size:12px;font-weight:700;color:#3a473e;margin-bottom:9px}.mode-card{display:flex;flex-direction:row;align-items:flex-start;gap:10px;padding:13px;border:1px solid var(--line);border-radius:11px;background:#fbfcfb;cursor:pointer}.mode-card:has(input:checked){border-color:var(--green2);background:#f3f9e9;box-shadow:0 0 0 2px rgba(119,185,0,.12)}.mode-card input{width:auto;margin:2px 0 0;accent-color:var(--green2)}.mode-card span{display:flex;flex-direction:column;gap:3px}.mode-card strong{font-size:13px;color:var(--text)}.monthly-grid{grid-template-columns:repeat(4,minmax(0,1fr))}@media(max-width:1100px){.monthly-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:780px){.monthly-grid,.energy-mode{grid-template-columns:1fr}}
.battery-selection-list{display:grid;gap:10px}.battery-selection-row{display:grid;grid-template-columns:minmax(0,2fr) minmax(120px,.5fr) auto;gap:12px;align-items:end;padding:14px;border:1px solid var(--line);border-radius:12px;background:#f7faf6}.battery-selection-row .icon-btn{margin-bottom:1px}@media(max-width:780px){.battery-selection-row{grid-template-columns:1fr}}
.form-validation{margin-bottom:18px;padding:15px 18px;border:1px solid #e4a7a7;border-radius:12px;background:#fff0f0;color:#8d2525}.form-validation ul{margin:8px 0 0;padding-left:20px}.invalid-field{border-color:#c83e3e!important;box-shadow:0 0 0 3px rgba(200,62,62,.14)!important}
.power-warning{margin-top:13px;padding:11px 13px;border-radius:10px;background:#fff0f0;border:1px solid #e4a7a7;font-size:12px;font-weight:700;color:#8d2525}
.login-page{min-height:100vh;display:grid;place-items:center;padding:24px;background:linear-gradient(135deg,#132019,#29402f)}.login-card{width:min(420px,100%);background:#fff;border-radius:18px;padding:34px;box-shadow:0 24px 70px rgba(0,0,0,.3)}.login-card>img{display:block;width:62px;height:76px;object-fit:contain;margin:0 auto 18px}.login-card h1{text-align:center;margin:0 0 8px}.login-card>p{text-align:center;color:var(--muted);font-size:13px;line-height:1.5;margin:0 0 24px}.login-card form{display:grid;gap:16px}.login-card .btn{margin-top:4px}.login-error{padding:11px 13px;margin-bottom:16px;border:1px solid #e4a7a7;border-radius:10px;background:#fff0f0;color:#8d2525;font-size:13px}
.saved-proposal{cursor:pointer;transition:border-color .15s,transform .15s}.saved-proposal:hover,.saved-proposal:focus{border-color:var(--green2);transform:translateY(-1px);outline:none}.saved-proposal small{display:block;margin-top:6px;color:var(--green2)}.history-section-title{margin-top:28px}
.history-actions{display:flex;gap:8px;align-items:center}
.design-actions{display:flex;align-items:center;gap:8px}
.prompt-card{margin-bottom:18px;padding:18px;border:1px solid var(--line);border-radius:14px;background:#f7faf5}.prompt-card .panel-head{margin-bottom:12px}.prompt-card textarea{font-family:Consolas,monospace;font-size:12px;line-height:1.5;background:#fff}