:root{--bg:#F8FAFC;--bg2:#FFFFFF;--bg3:#F1F5F9;--surface:#FFFFFF;--border:#E2E8F0;--border2:#CBD5E1;--text:#0F172A;--text2:#475569;--text3:#64748B;--accent:#EA580C;--accent2:#C2410C;--green:#10B981;--amber:#F59E0B;--blue:#2563EB;--error:#EF4444;--mono:'IBM Plex Mono',monospace;--sans:'Inter',system-ui,sans-serif}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
a{text-decoration:none;color:inherit}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--text);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}
body::before{content:'';position:fixed;inset:0;background-image:linear-gradient(rgba(0,0,0,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(0,0,0,.03) 1px,transparent 1px);background-size:40px 40px;pointer-events:none}

/* NAV - matched to main page */
nav{position:sticky;top:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:0 40px;height:56px;background:rgba(255,255,255,0.94);backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.nav-logo{font-family:var(--mono);font-size:14px;font-weight:600;color:var(--text);text-decoration:none;letter-spacing:0.5px}
.nav-logo span{color:var(--accent)}
.nav-links{display:flex;gap:28px;list-style:none}
.nav-links a{font-size:13px;color:var(--text2);text-decoration:none;transition:color .2s}
.nav-links a:hover{color:var(--text)}
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-console{border:1px solid var(--border2);color:var(--text2);padding:7px 15px;font-family:var(--sans);font-size:13px;font-weight:600;text-decoration:none;display:inline-block;transition:border-color .2s,color .2s,background .2s;border-radius:3px}
.nav-console:hover{border-color:var(--accent);color:var(--text);background:rgba(234,88,12,.07)}
.nav-cta{background:var(--accent);color:#fff;border:none;padding:7px 18px;font-family:var(--sans);font-size:13px;font-weight:600;cursor:pointer;text-decoration:none;display:inline-block;transition:background .2s,transform .15s;border-radius:3px}
.nav-cta:hover{background:var(--accent2);transform:translateY(-1px)}

/* CONSOLE HEADER */
.console-shell{position:relative;z-index:1;max-width:1200px;margin:0 auto;border-left:1px solid var(--border);border-right:1px solid var(--border);background:var(--bg2)}
.remote-hdr{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:20px;align-items:end;padding:24px 56px 18px;border-bottom:1px solid var(--border)}
.section-label{font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:2.5px;text-transform:uppercase;color:var(--accent);margin-bottom:8px;display:flex;align-items:center;gap:8px}
.section-label::before{content:'';display:inline-block;width:14px;height:1px;background:var(--accent)}
.remote-hdr h1{font-size:clamp(24px,2.5vw,34px);font-weight:800;letter-spacing:-0.5px;line-height:1.1;color:var(--text);margin-bottom:8px}
.remote-hdr p{font-size:14px;color:var(--text2);max-width:660px;line-height:1.55}
.hdr-meta{display:grid;gap:8px;justify-items:start}
.compat-note{font-family:var(--mono);font-size:11px;color:var(--text3);border:1px solid var(--border);padding:6px 10px;display:inline-block;border-radius:3px}

/* EVOLVING NOTICE */
.evolving-notice{display:flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11px;color:var(--text3);letter-spacing:.2px;line-height:1.45;margin-top:12px}
.evolving-icon{display:inline-flex;animation:spin 4s linear infinite}
@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}

/* MODE GRID */
.mode-console{display:grid;grid-template-columns:minmax(0,1fr) 420px;gap:1px;background:var(--border);border-bottom:1px solid var(--border)}
.remote-body{position:relative;z-index:1;min-width:0;background:var(--border)}
.fn-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-template-rows:repeat(3,minmax(126px,1fr));height:100%;gap:1px;background:var(--border)}
.fn-card{background:var(--bg2);padding:16px 18px;cursor:pointer;transition:background .2s,box-shadow .2s;position:relative;min-height:126px;display:flex;flex-direction:column}
.fn-card:hover{background:var(--bg3)}
.fn-card.active{background:rgba(234,88,12,.06);box-shadow:inset 0 0 0 2px var(--accent)}
.fn-card-icon{font-family:var(--mono);font-size:20px;font-weight:600;margin-bottom:8px;display:block;line-height:1;color:var(--accent)}
.fn-card-num{font-family:var(--mono);font-size:10px;color:var(--text3);margin-bottom:4px}
.fn-card-name{font-size:14px;font-weight:700;color:var(--text);margin-bottom:4px;line-height:1.25}
.fn-card-desc{font-size:13px;color:var(--text2);line-height:1.4;margin-bottom:10px}
.fn-tag{font-family:var(--mono);font-size:10px;font-weight:600;padding:3px 8px;letter-spacing:.3px;display:inline-block;border-radius:2px}
.fn-card .fn-tag{margin-top:auto;align-self:flex-start}
.tag-ambient{background:rgba(37,99,235,.1);color:var(--blue)}
.tag-smart{background:rgba(16,185,129,.1);color:var(--green)}
.tag-audio{background:rgba(180,130,255,.15);color:#9b7ed8}
.tag-security{background:rgba(239,68,68,.1);color:var(--error)}
.tag-utility{background:rgba(234,88,12,.1);color:var(--accent)}
.tag-night{background:rgba(99,102,241,.1);color:#6366f1}
.tag-fun{background:rgba(234,88,12,.12);color:var(--accent)}
.tag-desk{background:rgba(37,99,235,.12);color:var(--blue)}
.tag-alarm{background:rgba(239,68,68,.1);color:var(--error)}
.tag-sensor{background:rgba(16,185,129,.12);color:var(--green)}
.tag-party{background:rgba(245,158,11,.14);color:#b45309}
.tag-sleep{background:rgba(99,102,241,.12);color:#4f46e5}
.tag-music{background:rgba(180,130,255,.15);color:#7c3aed}

.console-side{min-width:0;background:var(--bg2);display:flex;flex-direction:column}

/* MODE PREVIEW */
.mode-preview-section{padding:18px 20px 16px;background:var(--bg2);border-bottom:1px solid var(--border);flex:1}
.mode-preview-head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;margin-bottom:14px}
.mode-preview-head h2{font-size:24px;font-weight:800;letter-spacing:-.35px;line-height:1.12;margin:0;color:var(--text)}
.mode-preview-head .fn-tag{margin-top:4px;flex-shrink:0}
.mode-preview-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--border);border:1px solid var(--border)}
.mode-preview-item{background:var(--bg);padding:11px 13px;min-height:104px}
.mode-preview-label{font-family:var(--mono);font-size:10px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin-bottom:5px}
.mode-preview-item p{font-size:13px;color:var(--text2);line-height:1.45}

/* FLASH CONTROLS */
.flash-section{padding:15px 20px 18px;background:var(--bg2)}
.selected-indicator{display:flex;align-items:center;gap:8px;margin-bottom:10px;font-family:var(--mono);font-size:12px}
.selected-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);flex-shrink:0}
.selected-name{color:var(--text);font-weight:600}
.status-row{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.pill{display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);font-size:12px;font-weight:600;letter-spacing:.06em;padding:4px 10px;border-radius:20px}
.pill.disconnected{background:rgba(224,92,92,.12);color:var(--error);border:1px solid rgba(224,92,92,.25)}
.pill.connected{background:rgba(76,175,125,.12);color:var(--green);border:1px solid rgba(76,175,125,.25)}
.pill.connecting,.pill.flashing{background:rgba(255,138,0,.12);color:var(--amber);border:1px solid rgba(255,138,0,.25)}
.dot{width:6px;height:6px;border-radius:50%;background:currentColor}
esp-web-install-button{display:block;width:100%;margin-bottom:10px}
.connect-btn{width:100%;padding:13px 14px;background:var(--accent);color:#fff;border:none;font-family:var(--sans);font-size:14px;font-weight:700;cursor:pointer;letter-spacing:.3px;transition:background .2s,transform .15s;border-radius:4px}
.connect-btn:hover{background:var(--accent2);transform:translateY(-1px)}
.progress{display:none}.progress.visible{display:block}
.progress-h{display:flex;justify-content:space-between;font-family:var(--mono);font-size:12px;color:var(--text3);margin-bottom:6px}
.barbg{height:4px;background:var(--bg3);overflow:hidden}
.bar{height:100%;width:0%;background:var(--accent);transition:width .3s ease}
@keyframes bar-pulse{0%,100%{opacity:.3}50%{opacity:1}}
.bar.indeterminate{width:100%!important;animation:bar-pulse 1s ease-in-out infinite}
.flash-note{font-family:var(--mono);font-size:12px;color:var(--text3);margin-top:8px}

/* SERIAL MONITOR */
.serial-section{max-width:1200px;margin:0 auto;background:var(--bg);border-left:1px solid var(--border);border-right:1px solid var(--border);border-bottom:1px solid var(--border)}
.serial-box{border:1px solid var(--border);margin:0 56px 0}
.serial-head{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;border-bottom:1px solid var(--border);background:var(--bg2)}
.serial-label{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--text3)}
.serial-actions{display:flex;gap:6px;align-items:center}
.serial-status{font-family:var(--mono);font-size:11px;color:var(--text3);margin-right:4px}
.serial-status.on{color:var(--green)}
.sbtn{font-family:var(--mono);font-size:12px;padding:4px 10px;background:transparent;border:1px solid var(--border2);color:var(--text2);cursor:pointer;line-height:1;border-radius:3px}
.sbtn:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}
.sbtn:disabled{opacity:.35;cursor:not-allowed}
.sbtn.active{border-color:var(--green);color:var(--green)}
.sbtn.active:hover:not(:disabled){border-color:var(--error);color:var(--error)}
.serial-log{height:160px;overflow-y:auto;padding:10px 14px;font-family:var(--mono);font-size:12px;line-height:1.8;background:#0a121d}
.sline{display:flex;gap:8px}
.stime{color:var(--text3);flex-shrink:0;font-size:11px;padding-top:1px}
.smsg{color:var(--text2);word-break:break-all}
.sline.telem .smsg{color:var(--green)}
.sline.serr .smsg{color:var(--error)}
.sline.swarn .smsg{color:var(--amber)}
.serial-pad{padding:20px 56px 32px}

/* LEARN LINK */
.learn-link-section{max-width:1200px;margin:0 auto;padding:20px 56px;text-align:center;border-left:1px solid var(--border);border-right:1px solid var(--border);border-bottom:1px solid var(--border);background:var(--bg)}
.learn-link{font-family:var(--mono);font-size:13px;color:var(--text3);transition:color .2s}
.learn-link:hover{color:var(--accent)}
.learn-link::after{content:' →'}

/* BUILDER SECTION */
.builder-section{max-width:1200px;margin:0 auto;padding:48px 56px;border-left:1px solid var(--border);border-right:1px solid var(--border);border-bottom:1px solid var(--border);background:var(--bg2)}
.builder-section .section-label{margin-bottom:16px}
.builder-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
.builder-left h2{font-size:clamp(20px,2.2vw,28px);font-weight:800;letter-spacing:-.3px;line-height:1.2;margin-bottom:12px}
.builder-left p{font-size:14px;color:var(--text2);line-height:1.7;margin-bottom:20px}
.wa-builder{display:inline-flex;align-items:center;gap:8px;background:#25d366;color:#fff;padding:12px 24px;font-family:var(--sans);font-size:14px;font-weight:700;transition:background .2s;border-radius:4px}
.wa-builder:hover{background:#20bf5c}
.builder-form{background:var(--bg3);border:1px solid var(--border);padding:20px}
.builder-form .form-group{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}
.builder-form label{font-family:var(--mono);font-size:12px;color:var(--text3);letter-spacing:.08em;text-transform:uppercase}
.builder-form input,.builder-form select{width:100%;padding:10px 12px;background:var(--bg2);border:1px solid var(--border2);color:var(--text);font-family:var(--sans);font-size:13px;border-radius:3px}
.builder-form input::placeholder{color:var(--text3)}
.builder-form input:focus,.builder-form select:focus{outline:none;border-color:rgba(234,88,12,.6)}
.builder-form button[type="submit"]{padding:10px 18px;background:var(--accent);color:#fff;border:none;font-family:var(--sans);font-size:13px;font-weight:700;cursor:pointer;transition:background .2s;border-radius:3px}
.builder-form button[type="submit"]:hover{background:var(--accent2)}
#feature-request-status{min-height:18px;margin-top:8px;color:var(--text3);font-size:12px;line-height:1.5}
#feature-request-status.ok{color:var(--green)}
#feature-request-status.error{color:var(--error)}
.hp-field{position:absolute;left:-9999px;opacity:0;pointer-events:none}

/* FOOTER */
footer{max-width:1200px;margin:0 auto;padding:28px 56px;display:flex;align-items:center;justify-content:space-between;border-left:1px solid var(--border);border-right:1px solid var(--border);border-bottom:1px solid var(--border)}
.footer-brand{font-family:var(--mono);font-size:13px;color:var(--text3)}
.footer-brand a{color:var(--accent);text-decoration:none}
.footer-links{display:flex;gap:24px;list-style:none}
.footer-links a{font-size:13px;color:var(--text3);text-decoration:none}
.footer-links a:hover{color:var(--text2)}

/* RESPONSIVE */
@media(max-width:900px){
  nav{padding:0 20px}
  .nav-links{display:none}
  .nav-console{padding:7px 12px;font-size:12px}
  .console-shell{border-left:none;border-right:none}
  .remote-hdr{grid-template-columns:1fr;padding:22px 24px 18px}
  .mode-console{grid-template-columns:1fr}
  .mode-preview-section,.flash-section,.serial-pad,.builder-section,.learn-link-section{padding-left:24px;padding-right:24px}
  .serial-box{margin:0 24px}
  .fn-grid{grid-template-columns:repeat(2,1fr)}
  .mode-preview-grid{grid-template-columns:1fr}
  .builder-grid{grid-template-columns:1fr}
  footer{flex-direction:column;gap:12px;padding:24px;text-align:center}
}
@media(max-width:520px){
  .remote-hdr,.mode-preview-section,.flash-section,.serial-pad,.builder-section,.learn-link-section{padding-left:16px;padding-right:16px}
  .serial-box{margin:0 16px}
  .fn-grid{grid-template-columns:1fr}
  .fn-card{min-height:118px}
  .remote-hdr h1{font-size:24px}
  .mode-preview-head{flex-direction:column;gap:10px}
  .mode-preview-item{padding:16px}
}