:root{--ink:#10182b;--muted:#586478;--accent:#00868b;--line:#dce1e7;--surface:#f2f4f6;--green:#21843a;--red:#cf2530;--amber:#835600;--bs-body-color:var(--ink);--bs-body-font-family:system-ui,-apple-system,"Segoe UI",sans-serif;--bs-link-color:var(--accent)}

*{box-sizing:border-box}
body{margin:0;background:#fff;color:var(--ink);font-size:1rem;line-height:1.5}
::selection{background:#c5ebeb;color:var(--ink)}
a{color:var(--accent);text-underline-offset:.22em}
button,input,a{-webkit-tap-highlight-color:transparent}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--accent);outline-offset:4px;box-shadow:none!important}
.app-width{max-width:1120px;padding-inline:24px}
.site-header{border-bottom:1px solid var(--line)}
.header-content{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{font-size:2rem;line-height:1;font-weight:800;letter-spacing:-.04em;color:var(--ink);text-decoration:none}
.brand span{color:var(--accent)}
nav{display:flex;align-items:center;gap:24px}
nav a,.nav-button{font-size:.875rem;color:var(--ink);text-decoration:none;padding:12px 0;display:inline-block;min-height:44px}
.nav-button{border:0;background:none}
nav a:hover,.nav-button:hover{color:var(--accent);text-decoration:underline}
nav form{margin:0}
.board-heading{position:relative;display:flex;align-items:center;justify-content:center;min-height:134px;gap:24px;padding:24px 0}
.board-title{text-align:center}
h1{font-size:2rem;letter-spacing:-.025em;font-weight:700;margin:0 0 2px}
h2{font-size:1.6rem;letter-spacing:-.02em;font-weight:700;margin:0 0 2px}
.board-title p{margin:0;color:var(--muted)}
.gateway-status{position:absolute;right:0;margin:0;display:flex;align-items:center;gap:10px;font-size:.875rem;max-width:31%}
.status-strip{background:var(--surface);padding:12px 18px;display:flex;justify-content:space-between;gap:12px;border-radius:4px;font-size:.875rem;color:#39465b}
.channel-sections{margin-top:32px;--bs-gutter-x:64px}
.output-section{border-left:1px solid var(--line)}
.section-description{color:var(--muted);margin-bottom:20px;font-size:.925rem}
.channel-list{list-style:none;padding:0;margin:0;border-top:1px solid var(--line)}
.channel-row{min-height:58px;display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line)}
.channel-row label{margin:0;cursor:pointer}
.input-state{display:flex;align-items:center;gap:16px;color:var(--muted);font-size:.875rem}
.state-text{min-width:32px}
.led{display:inline-block;width:12px;height:12px;border-radius:50%;flex:0 0 12px;background:var(--muted)}
.led.on{background:var(--green)}
.led.off{background:var(--red)}
.led.unknown{background:#8c95a3}
.led.stale{background:var(--amber)}
.input-state.on .state-text{color:var(--green);font-weight:600}
.input-state.off .state-text{color:var(--red)}
.output-control{display:flex;align-items:center;gap:16px}
.output-text{font-size:.875rem;color:var(--muted)}
.output-text.on{color:var(--accent);font-weight:650}
.output-switch{appearance:none;-webkit-appearance:none;position:relative;width:60px;height:44px;margin:0;cursor:pointer;border:0;background:transparent;flex-shrink:0}
.output-switch::before{content:"";position:absolute;left:2px;right:2px;top:7px;bottom:7px;border-radius:20px;background:#7b8492;transition:background-color .15s ease-out}
.output-switch::after{content:"";position:absolute;width:24px;height:24px;top:10px;left:5px;border-radius:50%;background:white;transition:transform .15s ease-out}
.output-switch:checked::before{background:var(--accent)}
.output-switch:checked::after{transform:translateX(26px)}
.output-switch:disabled{opacity:.45;cursor:not-allowed}
.output-help{font-size:.825rem;color:var(--muted);margin:18px 0 0;max-width:60ch}
.site-footer{color:var(--muted);font-size:.8rem;text-align:center;margin-top:44px;padding-block:20px;border-top:1px solid var(--line)}
.notice{margin:20px 0 0;padding:14px 16px;background:var(--surface);border-radius:4px;font-size:.9rem;overflow-wrap:anywhere}
.notice.error,.validation-error{color:#a01926}
.notice.error{background:#fff0f1}
.notice.success{color:#17682b;background:#edf8ef}
.stale-message{color:var(--amber);font-size:.85rem;margin-bottom:12px}
.account-panel{max-width:400px;margin:64px auto 80px}
.account-intro{color:var(--muted);margin:10px 0 28px}
.form-control{min-height:48px;border-color:#9ca6b3;caret-color:var(--accent)}
.form-control:focus{border-color:var(--accent)}
.form-label{font-weight:600;font-size:.925rem}
.btn-primary{--bs-btn-bg:var(--accent);--bs-btn-border-color:var(--accent);--bs-btn-hover-bg:#006b70;--bs-btn-hover-border-color:#006b70;--bs-btn-active-bg:#005d62;--bs-btn-active-border-color:#005d62;min-height:48px;font-weight:600}
.form-note{font-size:.875rem;color:var(--muted);margin-top:24px}
.validation-error ul{padding-left:20px}
.back-link{display:inline-block;margin-bottom:24px;min-height:44px;padding-top:10px}
.skip-link{position:absolute;top:-100px;left:16px;padding:12px;background:white;z-index:10}
.skip-link:focus{top:8px}
[hidden]{display:none!important}

@media(max-width:767.98px){.app-width{padding-inline:16px}
.header-content{min-height:68px}
nav{gap:16px}
.brand{font-size:1.75rem}
nav a,.nav-button{font-size:.8rem}
.board-heading{align-items:flex-start;flex-direction:column;gap:12px;padding:26px 0 20px}
.board-title{text-align:left}
h1{font-size:1.75rem}
.gateway-status{position:static;max-width:none}
.status-strip{flex-direction:column;gap:4px;padding:12px 14px}
.channel-sections{--bs-gutter-x:24px;margin-top:28px}
.output-section{border-left:0;margin-top:36px}
.channel-row{min-height:60px}
.section-description{margin-bottom:16px}
.site-footer{margin-top:32px}
.account-panel{margin:40px auto 64px}
.input-state{gap:10px}
.output-control{gap:12px}
}

@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;scroll-behavior:auto!important}
}

.channel-sections{margin-inline:0}

.input-section{padding-left:0}

.actual-output-section{margin-top:36px}

.output-section{padding-right:0}

@media(max-width:767.98px){.input-section,.output-section{padding-inline:0}
}

.is-stale .input-state{opacity:1}

.channel-row:has(.output-feedback:not([hidden])){flex-wrap:wrap;row-gap:0}

.output-feedback{flex-basis:100%;margin:0 0 12px;padding:10px 12px;font-size:.875rem;line-height:1.5;background:var(--surface);border-radius:4px;overflow-wrap:anywhere}

.output-feedback.success{color:#17682b;background:#edf8ef}

.output-feedback.error{color:#a01926;background:#fff0f1}


/* Pulse controls inherit the existing flat channel list and account form controls. */
.output-row{display:block;padding-block:14px 18px}
.output-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.output-heading>label{font-weight:600}
.pulse-intro{margin:0 0 20px}
.pulse-controls{display:flex;align-items:flex-end;gap:12px}
.pulse-field{flex:1;min-width:0}
.pulse-field .form-label{display:block;margin-bottom:6px;font-size:.875rem}
.pulse-count{width:100%;font-variant-numeric:tabular-nums}
.pulse-send{white-space:nowrap;flex-shrink:0}
.pulse-limit,.pulse-status,.pulse-error{font-size:.875rem;line-height:1.5;margin:8px 0 0;overflow-wrap:anywhere}
.pulse-limit{color:var(--muted)}
.pulse-status{color:var(--muted)}
.pulse-status[data-tone="warning"]{color:var(--amber)}
.pulse-status[data-tone="success"]{color:#17682b}
.pulse-status[data-tone="error"],.pulse-error{color:#a01926}
.pulse-retry,.pulse-clear{min-height:44px;margin-top:10px;color:var(--accent);border:1px solid var(--accent);font-weight:600}
.pulse-review{margin-top:12px;font-size:.875rem}
.pulse-review label{display:flex;align-items:flex-start;gap:10px}
.pulse-verified{min-width:24px;min-height:24px;margin-top:2px;accent-color:var(--accent)}
.pulse-clear{display:block}
.pulse-count[aria-invalid="true"]{border-color:#a01926}
@media(max-width:359px){.pulse-controls{flex-wrap:wrap}.pulse-field,.pulse-send{width:100%}}
@media(max-width:767.98px){.output-section{order:-1;margin-top:0}.input-section{margin-top:36px}}