:root {
  --background: #f5f7fa;
  --surface: #ffffff;
  --text: #17202a;
  --muted: #5f6b76;
  --border: #d9e0e6;
  --accent: #1769aa;
  --accent-dark: #0f4f82;
  --danger: #a61b1b;
  --danger-background: #fff0f0;
  --max-width: 1180px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--background);
  color: var(--text);
}

body { margin: 0; min-height: 100vh; }
a { color: inherit; }

.wip-banner { display: flex; justify-content: center; align-items: center; gap: 12px; padding: 10px 16px; background: #ffcc33; color: #2d2600; border-bottom: 1px solid #d6a900; text-align: center; font-size: 0.95rem; }
.wip-banner strong { letter-spacing: 0.08em; }
.site-header { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--border); backdrop-filter: blur(10px); }
.header-inner { width: min(100% - 32px, var(--max-width)); min-height: 72px; margin: 0 auto; display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 1.35rem; font-weight: 700; text-decoration: none; white-space: nowrap; }
.brand-logo { display: block; width: 48px; height: 48px; object-fit: contain; }
.main-nav { display: flex; align-items: center; gap: 20px; margin-left: auto; }
.main-nav a { text-decoration: none; font-weight: 600; }
.main-nav a:hover,.main-nav a:focus-visible { text-decoration: underline; }
.language-nav { display: flex; gap: 8px; margin-left: 16px; }
.language-nav a { padding: 6px 8px; border-radius: 4px; text-decoration: none; }
.language-nav a[aria-current="true"] { background: var(--text); color: white; }

.login-button,.primary-button,.secondary-button { display: inline-block; padding: 10px 16px; border-radius: 6px; font: inherit; font-weight: 600; cursor: pointer; }
.login-button,.primary-button { border: 1px solid var(--accent); background: var(--accent); color: white; text-decoration: none; }
.login-button:hover,.login-button:focus-visible,.primary-button:hover,.primary-button:focus-visible { background: var(--accent-dark); border-color: var(--accent-dark); text-decoration: none; }
.secondary-button { border: 1px solid var(--border); background: var(--surface); color: var(--text); }
.secondary-button:hover,.secondary-button:focus-visible { background: var(--background); }
.account-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; }
.account-actions form { margin: 0; }
.account-actions .secondary-button { text-decoration: none; }

.page { width: min(100% - 32px, var(--max-width)); margin: 0 auto; padding: 64px 0; }
.hero { min-height: 54vh; display: flex; align-items: center; padding: 64px 0 88px; }
.hero-copy { max-width: 820px; }
.eyebrow { margin: 0 0 12px; color: var(--accent-dark); font-size: .9rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.hero h1,.content-section h2 { margin: 0; line-height: 1.08; }
.hero h1 { margin-bottom: 20px; font-size: clamp(2.4rem,6vw,4.6rem); }
.hero p:not(.eyebrow) { max-width: 720px; margin: 0; font-size: 1.25rem; line-height: 1.65; color: var(--muted); }
.visitor-counter { display: inline-flex; align-items: baseline; gap: 10px; margin-top: 28px; padding: 10px 14px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); color: var(--muted); }
.visitor-counter strong { color: var(--accent-dark); font-size: 1.2rem; font-variant-numeric: tabular-nums; }
.content-section { scroll-margin-top: 100px; padding: 72px 0; border-top: 1px solid var(--border); }
.section-heading { max-width: 780px; margin-bottom: 36px; }
.section-heading h2,.split-section h2 { margin-bottom: 16px; font-size: clamp(1.8rem,4vw,3rem); }
.section-heading > p:last-child,.split-section > p { margin: 0; color: var(--muted); font-size: 1.08rem; line-height: 1.7; }
.feature-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 20px; }
.feature-card { padding: 28px; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; }
.feature-card h3 { margin: 0 0 12px; font-size: 1.25rem; }
.feature-card p { margin: 0; color: var(--muted); line-height: 1.65; }
.split-section { display: grid; grid-template-columns: minmax(0,.8fr) minmax(0,1.2fr); gap: 64px; align-items: start; }
.auth-panel,.portal-panel { max-width: 620px; margin: 24px auto; padding: 36px; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; }
.portal-panel-wide { max-width: 960px; }
.portal-section-link h2 { margin: 0; }
.portal-section-link h2 a { display: inline-block; color: var(--accent-dark); text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 4px; transition: color 120ms ease,background-color 120ms ease; }
.portal-section-link h2 a:hover,.portal-section-link h2 a:focus-visible { color: var(--accent); background: var(--background); border-radius: 4px; }

.available-data-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; margin-top: 24px; }
.available-data-card { display: flex; min-height: 92px; flex-direction: column; justify-content: space-between; gap: 10px; padding: 18px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface); text-decoration: none; }
.available-data-card strong { font-size: 1rem; }
.available-data-card span { color: var(--muted); }
.available-data-card[href] { cursor: pointer; border-color: #b7c9d8; }
.available-data-card[href] strong { color: var(--accent-dark); text-decoration: underline; text-underline-offset: 3px; }
.available-data-card[href]:hover,.available-data-card[href]:focus-visible { border-color: var(--accent); background: var(--background); }
.available-data-card[href]:hover strong,.available-data-card[href]:focus-visible strong { color: var(--accent); }

.device-master-detail { display: grid; grid-template-columns: minmax(190px,.32fr) minmax(0,.68fr); gap: 20px; margin-top: 24px; align-items: start; }
.device-list-panel { display: flex; flex-direction: column; gap: 6px; padding: 8px; border: 1px solid var(--border); border-radius: 9px; background: var(--background); }
.device-list-item { display: block; padding: 11px 12px; border-radius: 7px; color: var(--accent-dark); font-weight: 700; text-decoration: none; }
.device-list-item small { display: block; margin-top: 3px; color: inherit; font-weight: 400; overflow-wrap: anywhere; opacity: .82; }
.device-list-item:hover,.device-list-item:focus-visible { background: var(--surface); text-decoration: underline; }
.device-list-item.is-active { background: var(--accent); color: white; }
.device-detail-panel { min-width: 0; }
.device-detail-card { padding: 24px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface); }
.device-detail-card h2 { margin: 0 0 18px; color: var(--accent-dark); }
.device-parameter-list { margin: 0; border-top: 1px solid var(--border); }
.device-parameter-list > div { display: grid; grid-template-columns: minmax(130px,.36fr) minmax(0,.64fr); gap: 18px; padding: 11px 0; border-bottom: 1px solid var(--border); }
.device-parameter-list dt { font-weight: 700; }
.device-parameter-list dd { margin: 0; overflow-wrap: anywhere; }
.device-edit-section,.device-attributes-section { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--border); }
.device-edit-section h3,.device-attributes-section h3 { margin: 0 0 14px; color: var(--accent-dark); font-size: 1.05rem; }
.device-edit-grid { display: grid; gap: 12px; }
.device-edit-row { display: grid; grid-template-columns: minmax(130px,.36fr) minmax(0,.64fr); gap: 18px; align-items: center; padding: 8px 0; }
.device-edit-row label { font-weight: 700; }
.device-edit-row input[type="text"],.device-edit-row input[type="tel"],.device-edit-row input[type="password"],.device-edit-row input[type="date"],.device-edit-row input[type="datetime-local"],.device-edit-row select { width: 100%; min-width: 0; padding: 10px 12px; border: 1px solid var(--border); border-radius: 7px; background: white; color: var(--text); font: inherit; }
.device-edit-row input:focus,.device-edit-row select:focus { outline: 3px solid rgba(23,105,170,.16); border-color: var(--accent); }
.group-name-input { display: grid; grid-template-columns: minmax(0,1fr) auto; align-items: stretch; }
.group-name-input input[type="text"] { border-radius: 7px 0 0 7px; }
.group-name-suffix { display: flex; align-items: center; padding: 10px 12px; border: 1px solid var(--border); border-left: 0; border-radius: 0 7px 7px 0; background: #f3f6f8; color: var(--text); font-weight: 700; }
.group-name-input + small { display: block; margin-top: 6px; color: var(--muted); }
.device-edit-checkbox { grid-template-columns: 1fr; }
.device-edit-checkbox label { display: inline-flex; align-items: center; gap: 8px; }
.user-edit-form small { display: block; margin-top: 6px; color: var(--muted); }
.user-role-note { margin: 12px 0 0; color: var(--muted); font-size: .94rem; }
.device-color-palette { display: grid; grid-template-columns: repeat(8, 30px); gap: 7px; align-items: center; }
.device-color-swatch { display: block; width: 30px; height: 30px; padding: 0; border: 2px solid transparent; border-radius: 7px; cursor: pointer; }
.device-color-swatch input { position: absolute; opacity: 0; pointer-events: none; }
.device-color-swatch span { display: block; width: 100%; height: 100%; border: 1px solid #9aa0a6; border-radius: 5px; background: var(--swatch-color); }
.device-color-swatch:hover,.device-color-swatch:focus-within { border-color: var(--accent); }
.device-color-swatch.is-selected { border-color: var(--accent-dark); box-shadow: 0 0 0 2px rgba(23,105,170,.22); }
.device-attribute-row { padding: 13px 10px !important; border-left: 2px solid #b7c9d8; background: #f8fbfd; }
.device-attribute-list > div + div { margin-top: 6px; }
.group-edit-form .device-attribute-row,
.device-attributes-section > .device-edit-grid > .device-attribute-row {
  grid-template-columns: minmax(260px, 1fr) minmax(90px, .42fr);
  gap: 36px;
  padding-left: 22px !important;
}
.calendar-edit-form .device-attributes-section > .device-edit-grid > .device-attribute-row {
  grid-template-columns: minmax(130px,.36fr) minmax(0,.64fr);
  gap: 18px;
  padding-left: 0 !important;
}
.device-attributes-section > .device-edit-grid > .device-attribute-row > label:first-child {
  min-width: 0;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.group-edit-form .device-attribute-row > :nth-child(2),
.device-attributes-section > .device-edit-grid > .device-attribute-row > :nth-child(2) {
  min-width: 0;
}
.device-attribute-row.is-unused { border-left-color: #c99700; background: #fff9e8; }
.device-attribute-row.is-unused label { color: #7a6200; }
.device-form-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--border); }
.device-form-actions[hidden] { display: none; }
.form-success { padding: 12px 14px; border: 1px solid #a8d5b0; border-radius: 7px; background: #effaf1; color: #216b2d; }
.device-empty-state { margin: 0; padding: 12px; color: var(--muted); }

.data-link-controls { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)) auto; gap: 14px; align-items: end; margin-top: 22px; }
.data-link-controls.data-link-controls-single { grid-template-columns: minmax(0,1fr) auto; }
.data-link-controls label { display: grid; gap: 7px; font-weight: 700; }
.data-link-controls select { width: 100%; min-width: 0; padding: 10px 12px; border: 1px solid var(--border); border-radius: 7px; background: white; color: var(--text); font: inherit; }
.data-link-controls select:focus { outline: 3px solid rgba(23,105,170,.16); border-color: var(--accent); }
.data-link-matrix-wrap { max-height: min(70vh,720px); margin-top: 28px; overflow: auto; border: 1px solid var(--border); border-radius: 9px; }
.data-link-matrix { width: 100%; min-width: 560px; border-collapse: collapse; background: var(--surface); }
.data-link-matrix th,.data-link-matrix td { padding: 12px 14px; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); text-align: center; white-space: nowrap; }
.data-link-matrix th:first-child,.data-link-matrix td:first-child { text-align: left; font-weight: 700; position: sticky; left: 0; background: var(--surface); z-index: 1; }
.data-link-matrix thead th:first-child { background: var(--background); z-index: 3; }
.data-link-matrix th:last-child,.data-link-matrix td:last-child { border-right: 0; }
.data-link-matrix tr:last-child td { border-bottom: 0; }
.data-link-matrix thead th { position: sticky; top: 0; z-index: 2; background: var(--background); color: var(--accent-dark); box-shadow: 0 1px 0 var(--border); }
.data-link-empty { color: var(--muted); font-weight: 400 !important; text-align: center !important; position: static !important; }
.data-link-mark { display: inline-flex; width: 30px; height: 30px; align-items: center; justify-content: center; border: 1px solid var(--border); border-radius: 6px; color: var(--muted); background: var(--background); font-size: 1.05rem; font-weight: 800; }
.data-link-mark.is-linked { border-color: #8bc29a; background: #effaf1; color: #216b2d; }
.data-link-mark { appearance: none; margin: 0; padding: 0; font-family: inherit; cursor: default; }
button.data-link-mark { cursor: pointer; }
button.data-link-mark:hover,button.data-link-mark:focus-visible { outline: 3px solid rgba(23,105,170,.18); outline-offset: 2px; }
.data-link-mark.is-pending { opacity: .55; cursor: wait; }
.data-link-mark.is-error { border-color: var(--danger) !important; background: var(--danger-background) !important; color: var(--danger) !important; box-shadow: 0 0 0 2px rgba(166,27,27,.15); }

.auth-panel h1,.portal-panel h1 { margin: 0 0 14px; font-size: clamp(1.9rem,4vw,2.8rem); }
.auth-intro,.portal-welcome { margin: 0 0 28px; color: var(--muted); line-height: 1.65; }
.auth-form { display: grid; gap: 10px; }
.auth-form label { margin-top: 8px; font-weight: 700; }
.auth-form input[type="text"],.auth-form input[type="password"] { width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: 7px; background: white; color: var(--text); font: inherit; }
.auth-form input:focus { outline: 3px solid rgba(23,105,170,.18); border-color: var(--accent); }
.auth-form .primary-button { margin-top: 14px; }
.form-error { padding: 12px 14px; border: 1px solid #e6b8b8; border-radius: 7px; background: var(--danger-background); color: var(--danger); }
.account-summary { margin: 28px 0; border-top: 1px solid var(--border); }
.account-summary > div { display: grid; grid-template-columns: 140px 1fr; gap: 20px; padding: 14px 0; border-bottom: 1px solid var(--border); }
.account-summary dt { font-weight: 700; }
.account-summary dd { margin: 0; overflow-wrap: anywhere; }
.site-footer { border-top: 1px solid var(--border); background: var(--surface); }
.footer-inner { width: min(100% - 32px,var(--max-width)); margin: 0 auto; padding: 24px 0; color: var(--muted); }

@media (max-width: 900px) {
  .header-inner { flex-wrap: wrap; padding: 14px 0; }
  .main-nav { width: 100%; order: 3; margin-left: 0; flex-wrap: wrap; }
  .language-nav { margin-left: auto; }
  .available-data-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 700px) {
  .wip-banner { flex-direction: column; gap: 2px; padding: 9px 12px; }
  .brand-logo { width: 42px; height: 42px; }
  .page { padding: 28px 0; }
  .hero { min-height: auto; padding: 40px 0 56px; }
  .content-section { padding: 48px 0; }
  .feature-grid,.split-section,.available-data-grid,.device-master-detail { grid-template-columns: 1fr; }
  .split-section { gap: 16px; }
  .auth-panel,.portal-panel { margin: 0 auto; padding: 24px; }
  .account-summary > div,.device-parameter-list > div,.device-edit-row { grid-template-columns: 1fr; gap: 4px; }
  .group-edit-form .device-attribute-row,
  .device-attributes-section > .device-edit-grid > .device-attribute-row,
  .calendar-edit-form .device-attribute-row { grid-template-columns: 1fr; gap: 6px; }
  .device-color-palette { grid-template-columns: repeat(6, 30px); }
  .device-form-actions { justify-content: stretch; }
  .device-form-actions button { flex: 1; }
  .data-link-controls { grid-template-columns: 1fr; }
}

.downloads-page-actions { margin: 0 0 20px; }
.downloads-table td:last-child { width: 1%; white-space: nowrap; }
.download-upload-form { display: grid; gap: 18px; max-width: 680px; margin-top: 24px; }
.download-upload-form label { display: grid; gap: 8px; font-weight: 700; }
.download-upload-form input[type="file"] { width: 100%; padding: 12px; border: 1px solid var(--border); border-radius: 7px; background: var(--surface); color: var(--text); font: inherit; }
.download-upload-form .primary-button { justify-self: start; }

.download-upload-progress { display: grid; gap: 8px; margin-top: 4px; }
.download-upload-progress[hidden] { display: none; }
.download-upload-progress progress { width: 100%; height: 18px; accent-color: var(--accent); }
.download-upload-progress p { margin: 0; color: var(--muted); font-weight: 600; }
.download-upload-form button:disabled { cursor: wait; opacity: .65; }


.split-section-copy { display: grid; justify-items: start; gap: 20px; }
.split-section-copy p { margin: 0; color: var(--muted); font-size: 1.08rem; line-height: 1.7; }

.manual-hero { max-width: 900px; margin: 0 0 40px; }
.manual-hero h1 { margin: 0 0 18px; font-size: clamp(2.2rem,5vw,4rem); line-height: 1.08; }
.manual-hero > p:not(.eyebrow) { max-width: 760px; color: var(--muted); font-size: 1.12rem; line-height: 1.7; }
.manual-language-note { padding: 14px 16px; border-left: 4px solid var(--accent); border-radius: 0 8px 8px 0; background: var(--surface); }

.manual-layout { display: grid; grid-template-columns: minmax(220px,.28fr) minmax(0,.72fr); gap: 28px; align-items: start; }
.manual-toc { position: sticky; top: 24px; max-height: calc(100vh - 48px); overflow: auto; padding: 24px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
.manual-toc h2,.manual-mobile-toc h2 { margin: 0 0 14px; font-size: 1.1rem; }
.manual-toc ol,.manual-mobile-toc ol { margin: 0; padding-left: 22px; }
.manual-toc li,.manual-mobile-toc li { margin: 0 0 8px; line-height: 1.35; }
.manual-toc a,.manual-mobile-toc a { color: var(--accent-dark); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.manual-mobile-toc { display: none; }

.manual-article { min-width: 0; padding: clamp(24px,4vw,52px); border: 1px solid var(--border); border-radius: 14px; background: var(--surface); }
.manual-section { scroll-margin-top: 24px; }
.manual-section + .manual-section { margin-top: 56px; padding-top: 48px; border-top: 1px solid var(--border); }
.manual-article h2 { margin: 0 0 22px; font-size: clamp(1.65rem,3vw,2.35rem); line-height: 1.15; }
.manual-article h3 { scroll-margin-top: 24px; margin: 34px 0 12px; font-size: 1.25rem; line-height: 1.3; }
.manual-article p,.manual-article li { line-height: 1.72; }
.manual-article p { margin: 0 0 18px; }
.manual-article ul,.manual-article ol { margin: 0 0 22px; padding-left: 26px; }
.manual-article li + li { margin-top: 7px; }
.manual-article code { padding: 2px 5px; border-radius: 4px; background: var(--background); font-size: .92em; }
.manual-note { margin: 0 0 34px; padding: 18px 20px; border-left: 4px solid var(--accent); border-radius: 0 9px 9px 0; background: var(--background); }
.manual-note p { margin: 0; }
.manual-figure { margin: 30px 0; text-align: center; }
.manual-figure img { display: block; width: auto; max-width: min(100%,560px); max-height: 760px; margin: 0 auto; border: 1px solid var(--border); border-radius: 14px; background: var(--background); box-shadow: 0 14px 34px rgba(23,32,42,.12); }
.manual-figure figcaption { margin-top: 10px; color: var(--muted); font-size: .92rem; }
.manual-back-to-top { margin-top: 52px !important; padding-top: 24px; border-top: 1px solid var(--border); text-align: right; }
.manual-back-to-top a { color: var(--accent-dark); font-weight: 700; }

@media (max-width: 900px) {
  .manual-layout { grid-template-columns: 1fr; }
  .manual-toc { display: none; }
  .manual-mobile-toc { display: block; margin: 0 0 24px; padding: 16px 18px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
  .manual-mobile-toc summary { cursor: pointer; font-weight: 700; }
  .manual-mobile-toc nav { margin-top: 18px; }
}

@media (max-width: 700px) {
  .manual-hero { margin-bottom: 26px; }
  .manual-article { padding: 22px 18px; border-radius: 10px; }
  .manual-section + .manual-section { margin-top: 40px; padding-top: 36px; }
  .manual-figure { margin: 24px -6px; }
  .manual-figure img { border-radius: 9px; }
}