/* ==========================================================
   Niblo — simple, calm, green & tomato-red
   ========================================================== */

:root {
    --green:       #4c9a2a;
    --green-dark:  #2f5d27;
    --green-soft:  #e9f3de;
    --cream:       #f7faf2;
    --ink:         #0f1f14;
    --muted:       #55645a;
    --line:        #dfe8d5;
    --tomato:      #e0342b;
    --white:       #ffffff;

    --radius:      18px;
    --shadow:      0 18px 40px -18px rgba(31, 70, 28, .35);
    --max:         1080px;
}

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

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--ink);
    background: var(--cream);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--green-dark); }
a:hover { color: var(--green); }

.container { width: min(100% - 40px, var(--max)); margin-inline: auto; }

h1, h2, h3, h4 { line-height: 1.15; margin: 0 0 .5em; letter-spacing: -.02em; }
h1 { font-size: clamp(2.4rem, 6vw, 4rem); font-weight: 800; }
h2 { font-size: clamp(1.7rem, 4vw, 2.4rem); font-weight: 800; }
h3 { font-size: 1.15rem; font-weight: 700; }
p  { margin: 0 0 1em; }

.green { color: var(--green); }
.small { font-size: .85rem; color: var(--muted); }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .5em;
    padding: .9em 1.6em;
    background: var(--green);
    color: var(--white);
    font-weight: 700; font-size: 1rem;
    text-decoration: none;
    border-radius: 999px;
    border: 2px solid var(--green);
    transition: transform .15s ease, background .15s ease;
}
.btn:hover { background: var(--green-dark); border-color: var(--green-dark); color: var(--white); transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--green-dark); border-color: var(--green-dark); }
.btn-outline:hover { background: var(--green-dark); color: var(--white); }
.btn-small { padding: .55em 1.2em; font-size: .92rem; }

/* ---------- Header ---------- */
.site-header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(247, 250, 242, .92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }

.brand {
    display: inline-flex; align-items: center; gap: .6rem;
    font-weight: 800; font-size: 1.35rem; letter-spacing: -.02em;
    color: var(--green-dark); text-decoration: none;
}
.brand img { border-radius: 10px; }

.nav { display: flex; align-items: center; gap: 1.6rem; }
.nav a:not(.btn) { color: var(--ink); text-decoration: none; font-weight: 600; font-size: .98rem; }
.nav a:not(.btn):hover, .nav a.is-active { color: var(--green); }

.nav-toggle, .nav-burger { display: none; }

/* ---------- Hero ---------- */
.hero {
    background:
        radial-gradient(900px 500px at 85% -10%, var(--green-soft), transparent 60%),
        var(--cream);
    padding: 72px 0 56px;
}
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }

.eyebrow {
    display: inline-block;
    background: var(--green-soft); color: var(--green-dark);
    font-weight: 700; font-size: .85rem;
    padding: .35em .9em; border-radius: 999px; margin-bottom: 1.2rem;
}
.hero h1 .green { display: block; }
.hero p.lead { font-size: 1.2rem; color: var(--muted); max-width: 32em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 1.6rem; }

.hero-shot { justify-self: center; max-width: 340px; }
.hero-shot img { border-radius: 28px; box-shadow: var(--shadow); }

/* ---------- Sections ---------- */
.section { padding: 72px 0; scroll-margin-top: 68px; }
.section.alt { background: var(--white); border-block: 1px solid var(--line); }
.section-head { text-align: center; max-width: 620px; margin: 0 auto 44px; }
.section-head p { color: var(--muted); font-size: 1.1rem; }

/* ---------- Feature cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 26px;
}
.section.alt .card { background: var(--cream); }
.card .icon {
    width: 48px; height: 48px; border-radius: 14px;
    display: grid; place-items: center;
    background: var(--green-soft); color: var(--green-dark);
    margin-bottom: 16px;
}
.card .icon.red { background: #fde8e6; color: var(--tomato); }
.card .icon svg { width: 24px; height: 24px; }
.card p { margin: 0; color: var(--muted); }

/* ---------- Screenshot gallery ---------- */
.gallery {
    display: flex; gap: 20px;
    overflow-x: auto; padding: 10px 20px 28px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}
.gallery::-webkit-scrollbar { height: 8px; }
.gallery::-webkit-scrollbar-thumb { background: var(--line); border-radius: 8px; }
.gallery img {
    flex: 0 0 auto; width: 250px; height: auto;
    scroll-snap-align: center;
    border-radius: 24px; box-shadow: var(--shadow);
    border: 1px solid var(--line);
}

/* ---------- Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; counter-reset: step; }
.step { text-align: center; padding: 10px 18px; }
.step::before {
    counter-increment: step; content: counter(step);
    display: grid; place-items: center;
    width: 52px; height: 52px; margin: 0 auto 16px;
    background: var(--green); color: var(--white);
    font-weight: 800; font-size: 1.3rem; border-radius: 50%;
}
.step p { color: var(--muted); margin: 0; }

/* ---------- CTA ---------- */
.cta {
    background: linear-gradient(135deg, var(--green) 0%, var(--green-dark) 100%);
    color: var(--white);
    border-radius: 28px; padding: 56px 28px; text-align: center;
}
.cta p { opacity: .92; font-size: 1.1rem; max-width: 34em; margin-inline: auto; }
.cta .btn { background: var(--white); color: var(--green-dark); border-color: var(--white); margin-top: .6rem; }
.cta .btn:hover { background: var(--green-soft); border-color: var(--green-soft); }

/* ---------- Notice ---------- */
.notice {
    max-width: 760px; margin: 0 auto;
    background: var(--white);
    border-left: 4px solid var(--tomato);
    border-radius: 10px;
    padding: 16px 20px; color: var(--muted); font-size: .95rem;
}

/* ---------- Document pages (privacy / terms / support) ---------- */
.page-head { background: var(--green-soft); padding: 56px 0 44px; border-bottom: 1px solid var(--line); }
.page-head p { color: var(--muted); margin: 0; }

.doc { max-width: 760px; margin: 0 auto; padding: 48px 0 80px; }
.doc h2 { font-size: 1.45rem; margin-top: 2.2em; }
.doc h3 { margin-top: 1.5em; }
.doc ul { padding-left: 1.3em; }
.doc li { margin-bottom: .4em; }
.doc .toc {
    background: var(--white); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 18px 24px; margin-bottom: 2rem;
}
.doc .toc ol { margin: .4em 0 0; padding-left: 1.2em; columns: 2; }

/* Support */
.contact-box {
    background: var(--white); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 28px; text-align: center; margin-bottom: 2rem;
}
details {
    background: var(--white); border: 1px solid var(--line);
    border-radius: 14px; padding: 16px 20px; margin-bottom: 12px;
}
summary { cursor: pointer; font-weight: 700; list-style: none; position: relative; padding-right: 28px; }
summary::-webkit-details-marker { display: none; }
summary::after {
    content: "+"; position: absolute; right: 0; top: -2px;
    font-size: 1.5rem; color: var(--green); font-weight: 400;
}
details[open] summary::after { content: "–"; }
details p { margin: .8em 0 0; color: var(--muted); }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: #c9d6cc; padding: 56px 0 28px; margin-top: 0; }
.site-footer a { color: #c9d6cc; text-decoration: none; }
.site-footer a:hover { color: var(--white); }
.site-footer .brand { color: var(--white); }
.footer-inner { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; }
.footer-brand p { margin-top: 12px; max-width: 22em; color: #9fb0a4; }
.footer-links h4 { color: var(--white); font-size: .95rem; margin-bottom: 14px; }
.footer-links a { display: block; margin-bottom: 8px; font-size: .95rem; }
.footer-bottom { border-top: 1px solid #243a2b; margin-top: 36px; padding-top: 22px; }
.footer-bottom p { margin: 0 0 6px; font-size: .88rem; }
.footer-bottom .small { color: #8b9d90; }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
    .hero { padding: 44px 0 40px; }
    .hero-grid { grid-template-columns: 1fr; text-align: center; }
    .hero p.lead { margin-inline: auto; }
    .hero-actions { justify-content: center; }
    .hero-shot { order: -1; max-width: 260px; }

    .cards, .steps { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 28px; }
    .doc .toc ol { columns: 1; }

    .nav-burger {
        display: block; width: 44px; height: 44px; cursor: pointer; position: relative;
    }
    .nav-burger span, .nav-burger span::before, .nav-burger span::after {
        content: ""; position: absolute; left: 11px; width: 22px; height: 2px;
        background: var(--ink); border-radius: 2px; transition: .2s;
    }
    .nav-burger span { top: 21px; }
    .nav-burger span::before { top: -7px; left: 0; }
    .nav-burger span::after  { top: 7px;  left: 0; }

    .nav {
        position: absolute; top: 68px; left: 0; right: 0;
        flex-direction: column; align-items: stretch; gap: 0;
        background: var(--cream); border-bottom: 1px solid var(--line);
        padding: 8px 20px 20px; display: none;
    }
    .nav a:not(.btn) { padding: 14px 0; border-bottom: 1px solid var(--line); }
    .nav .btn { margin-top: 14px; }
    .nav-toggle:checked ~ .nav { display: flex; }
}