/* IoT Advisors — white page on the gears background, dark menu bar, logo blue accents */
:root {
  --bg: #212121;
  --page: #ffffff;
  --text: #404040;
  --heading: #444444;
  --muted: #6b6b6b;
  --accent: #2f5c95;        /* logo blue */
  --accent-dark: #22446f;
  --bar: #333333;
  --footer: #282828;
  --line: #dddddd;
  --error: #b3261e;
  --font-body: "Source Sans 3", "Source Sans Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-head: "Yrsa", Georgia, "Times New Roman", serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg) url("../img/gears.jpg") center top repeat;
  color: var(--text);
  font: 400 1.125rem/1.6 var(--font-body);
}

a { color: var(--accent); }
a:hover, a:focus { color: var(--accent-dark); }
img { max-width: 100%; height: auto; }

.visually-hidden, .hp {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

.page {
  max-width: 1180px;
  margin: 0 auto;
  background: var(--page);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- header ---------- */
.site-header { text-align: center; padding: 2.5rem 1rem 1.5rem; }
.logo img { display: block; margin: 0 auto; width: min(640px, 100%); }
.site-title { margin: 1rem 0 0; font: 700 1.75rem/1.2 var(--font-head); }
.site-title a { color: var(--heading); text-decoration: none; }
.site-description { margin: .25rem 0 0; color: var(--muted); font-style: italic; }

.social { list-style: none; margin: 1rem 0 0; padding: 0; display: flex; justify-content: center; flex-wrap: wrap; gap: .5rem; }
.social a {
  display: inline-block; padding: .2rem .8rem; border-radius: 999px;
  background: var(--bar); color: #fff; font-size: .85rem; text-decoration: none;
}
.social a:hover, .social a:focus { background: var(--accent); color: #fff; }

/* ---------- menu ---------- */
.main-nav { background: var(--bar); }
.main-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; }
.main-nav a {
  display: block; padding: .9rem 1.1rem; color: #fff; text-decoration: none;
  font-size: .85rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
}
.main-nav a:hover, .main-nav a:focus, .main-nav a[aria-current="page"] { background: var(--accent); color: #fff; }
.menu-toggle-box { position: absolute; opacity: 0; pointer-events: none; }
.menu-toggle { display: none; }

/* ---------- content ---------- */
.content { flex: 1; width: 100%; max-width: 860px; margin: 0 auto; padding: 2.5rem 1.5rem 3rem; }
.entry-title { color: var(--heading); font: 700 2.4rem/1.15 var(--font-head); margin: 0 0 1.25rem; }
.entry-title a { color: inherit; text-decoration: none; }
.entry-title a:hover, .entry-title a:focus { color: var(--accent); }
.entry ul { padding-left: 1.4rem; }
.entry li { margin: .3rem 0; }
.alignright { float: right; margin: .35rem 0 1rem 1.5rem; }
.entry::after { content: ""; display: table; clear: both; }
.file-note { color: var(--muted); font-size: .9em; }

/* home page teasers */
.featured {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem;
  margin-top: 3rem; padding-top: 2.5rem; border-top: 1px solid var(--line);
}
.featured-page .entry-title { font-size: 1.6rem; margin-bottom: .75rem; }
.featured-page p { margin: 0 0 .75rem; font-size: 1rem; }
.more-link { font-weight: 600; font-size: .95rem; }

/* ---------- forms ---------- */
.contact-form { margin-top: 2rem; max-width: 560px; }
.field { margin-bottom: 1.1rem; }
.field label { display: block; font-weight: 600; margin-bottom: .3rem; }
.req { font-weight: 400; color: var(--muted); font-size: .9em; }
input[type="text"], input[type="email"], input[type="url"], input[type="password"], textarea {
  width: 100%; padding: .6rem .7rem; font: inherit; color: inherit;
  border: 1px solid #c8c8c8; border-radius: 3px; background: #fff;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent); }
[aria-invalid="true"] { border-color: var(--error); }
.error { color: var(--error); margin: .3rem 0 0; font-size: .95rem; }
button {
  font: 600 .9rem var(--font-body); letter-spacing: .08em; text-transform: uppercase;
  color: #fff; background: var(--bar); border: 0; border-radius: 3px; padding: .75rem 1.6rem; cursor: pointer;
}
button:hover, button:focus { background: var(--accent); }
.notice { background: #eef3fa; border-left: 4px solid var(--accent); padding: 1rem 1.25rem; margin: 1.5rem 0; }
.notice h2 { margin: 0 0 .25rem; font: 700 1.5rem var(--font-head); color: var(--heading); }
.notice p { margin: .25rem 0; }

/* /admin */
form.inline { display: inline; }
.link-button { background: none; color: var(--accent); padding: 0; text-transform: none; letter-spacing: 0; font-size: .95rem; text-decoration: underline; }
.link-button:hover, .link-button:focus { background: none; color: var(--accent-dark); }
.message { border: 1px solid var(--line); border-radius: 4px; padding: 1rem 1.25rem; margin: 1rem 0; }
.message .meta { display: block; color: var(--muted); font-size: .9rem; }
.message .body { white-space: pre-wrap; margin: .75rem 0; }

/* ---------- footer ---------- */
.site-footer { background: var(--footer); color: #fff; text-align: center; padding: 1.5rem 1rem 2rem; font-size: .95rem; }
.site-footer a { color: #fff; }
.site-footer .social { margin: 0 0 1rem; }
.site-footer .social a { background: #444; }
.site-footer p { margin: 0; }

/* ---------- small screens ---------- */
@media (max-width: 800px) {
  .featured { grid-template-columns: 1fr; gap: 1.5rem; }
}
@media (max-width: 640px) {
  body { font-size: 1.0625rem; }
  .site-header { padding: 1.5rem 1rem 1rem; }
  .entry-title { font-size: 2rem; }
  .content { padding: 1.75rem 1rem 2.5rem; }
  .alignright { float: none; display: block; margin: 0 auto 1rem; max-width: 220px; }
  .menu-toggle {
    display: block; padding: .9rem 1rem; color: #fff; cursor: pointer; text-align: center;
    font-size: .85rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  }
  .main-nav ul { display: none; flex-direction: column; }
  .menu-toggle-box:checked ~ ul { display: flex; }
  .menu-toggle-box:focus-visible + .menu-toggle { outline: 2px solid #fff; outline-offset: -4px; }
  .main-nav a { text-align: center; border-top: 1px solid #444; }
}