/* A demo support page in the general style of acer.com: black header, Acer green accents, clean white content. */
:root {
    --green: #83B81A;
    --green-dark: #5E8A0B;
    --ink: #1A1A1A;
    --muted: #5B5B5B;
    --line: #E3E3E3;
    --soft: #F5F5F5;
    --warn-bg: #FFF3CD;
    --warn-ink: #5C4400;
    --warn-line: #E0B400;
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
    font: 16px/1.5 "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--ink);
    background: #fff;
}

.wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* the demonstration warning: always visible at the top */
.demo-banner {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--warn-bg);
    color: var(--warn-ink);
    border-bottom: 3px solid var(--warn-line);
    padding: 10px 24px;
    font-size: 14px;
    text-align: center;
}
.demo-banner strong { letter-spacing: .04em; }
.demo-banner-url { font-weight: 600; text-decoration: underline; }

/* header */
.site-header { background: #000; color: #fff; }
.header-row { display: flex; align-items: center; gap: 32px; height: 64px; }
.brand { display: flex; align-items: center; gap: 8px; text-decoration: none; }
.brand-word {
    color: var(--green);
    font: italic 800 34px/1 "Segoe UI", Arial, sans-serif;
    letter-spacing: -1px;
}
.brand-demo {
    background: var(--warn-line);
    color: #000;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 3px;
    letter-spacing: .08em;
}
.main-nav { display: flex; gap: 24px; font-size: 15px; flex: 1; }
.main-nav span { color: #ddd; cursor: default; padding: 20px 0; border-bottom: 3px solid transparent; }
.main-nav span.active { color: #fff; border-bottom-color: var(--green); }
.header-tools { color: #bbb; font-size: 14px; }

/* hero */
.hero {
    background: linear-gradient(120deg, #111 0%, #232323 55%, #2f4d06 100%);
    color: #fff;
    padding: 56px 0 48px;
}
.eyebrow { color: var(--green); text-transform: uppercase; font-weight: 600; letter-spacing: .1em; margin: 0 0 8px; font-size: 13px; }
.hero h1 { font-size: 40px; font-weight: 300; margin: 0 0 12px; }
.lead { color: #ccc; max-width: 620px; margin: 0 0 28px; }
.search { display: flex; max-width: 620px; }
.search input {
    flex: 1;
    padding: 14px 16px;
    border: 0;
    font-size: 15px;
    background: #e9e9e9;
    color: #777;
}
.search button {
    padding: 0 28px;
    border: 0;
    background: #7a7a7a;
    color: #fff;
    font-weight: 600;
}
.hero-note { font-size: 13px; color: #aaa; margin: 8px 0 0; }

/* chat call to action */
.chat-card {
    display: flex;
    align-items: center;
    gap: 24px;
    margin: -28px 0 40px;
    padding: 28px 32px;
    background: #fff;
    border: 1px solid var(--line);
    border-left: 6px solid var(--green);
    box-shadow: 0 8px 24px rgba(0, 0, 0, .08);
    position: relative;
}
.chat-card-text { flex: 1; }
.chat-card h2 { margin: 0 0 6px; font-size: 24px; font-weight: 600; }
.chat-card p { margin: 0; color: var(--muted); }
.chat-status { margin-top: 8px !important; color: #A11 !important; font-weight: 600; }
.chat-status:empty { display: none; }

.btn-primary {
    background: var(--green);
    color: #000;
    border: 0;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
}
.btn-primary:hover, .btn-primary:focus-visible { background: var(--green-dark); color: #fff; }

/* topic tiles */
.section-title { font-size: 26px; font-weight: 300; margin: 0 0 20px; }
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; margin-bottom: 48px; }
.tile { background: var(--soft); padding: 24px; border-top: 3px solid transparent; }
.tile:hover { border-top-color: var(--green); }
.tile h3 { margin: 0 0 8px; font-size: 18px; font-weight: 600; }
.tile p { margin: 0; color: var(--muted); font-size: 15px; }
.tile-accent { background: #F1F7E6; border-top-color: var(--green); }

.steps { margin-bottom: 56px; }
.steps ol { margin: 0; padding-left: 22px; color: var(--muted); }
.steps li { margin-bottom: 6px; }

/* footer */
.site-footer { background: #1E1E1E; color: #bbb; padding: 32px 0; font-size: 14px; }
.site-footer strong { color: #fff; }
.site-footer a { color: var(--green); }
.footer-small { font-size: 12px; color: #888; }

.index { padding: 40px 24px; }
.index a { color: var(--green-dark); font-weight: 600; }

@media (max-width: 760px) {
    .wrap { padding: 0 16px; }
    .main-nav, .header-tools { display: none; }
    .hero h1 { font-size: 30px; }
    .chat-card { flex-direction: column; align-items: stretch; padding: 22px; }
}