/* ==========================================================================
   S2Nodes — shared site styles
   Used by every page (studio home + every app page).
   App pages add their own small stylesheet for app-specific pieces.
   ========================================================================== */

:root {
  --bg: #f7f8fa;
  --bg-alt: #eef0f4;
  --surface: #ffffff;
  --fg: #15181d;
  --muted: #5d6573;
  --line: #e2e5ea;
  --accent: #2f5be6;          /* S2Nodes blue (matches the SideNotes icon) */
  --accent-2: #5a4fdc;        /* indigo end of the icon gradient */
  --accent-fg: #ffffff;
  --accent-soft: #e8eeff;
  --note: #fff6cc;            /* sticky-note yellow */
  --note-edge: #f5b400;
  --note-fg: #5b4a12;
  --hl: #ffe066;
  --link: #8b5cf6;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 2px 8px rgba(15, 23, 42, .06);
  --shadow-lg: 0 2px 4px rgba(15, 23, 42, .05), 0 18px 48px rgba(15, 23, 42, .12);
  --radius: 14px;
  --maxw: 1120px;
  --gutter: 24px;
  --font-code: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111317;
    --bg-alt: #171a1f;
    --surface: #1d2026;
    --fg: #eceef1;
    --muted: #9aa3b0;
    --line: #2c3038;
    --accent: #7c9bff;
    --accent-2: #9a8cff;
    --accent-fg: #0b1020;
    --accent-soft: #1f2744;
    --note: #3a3320;
    --note-edge: #e0a800;
    --note-fg: #f1e3b0;
    --hl: #8a6d00;
    --link: #b39bff;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4), 0 2px 8px rgba(0, 0, 0, .3);
    --shadow-lg: 0 2px 4px rgba(0, 0, 0, .4), 0 18px 48px rgba(0, 0, 0, .45);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #111317;
  --bg-alt: #171a1f;
  --surface: #1d2026;
  --fg: #eceef1;
  --muted: #9aa3b0;
  --line: #2c3038;
  --accent: #7c9bff;
  --accent-2: #9a8cff;
  --accent-fg: #0b1020;
  --accent-soft: #1f2744;
  --note: #3a3320;
  --note-edge: #e0a800;
  --note-fg: #f1e3b0;
  --hl: #8a6d00;
  --link: #b39bff;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4), 0 2px 8px rgba(0, 0, 0, .3);
  --shadow-lg: 0 2px 4px rgba(0, 0, 0, .4), 0 18px 48px rgba(0, 0, 0, .45);
  color-scheme: dark;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
/* Code-style typography: headings, labels, buttons and nav use the monospace face */
h1, h2, h3, .eyebrow, .btn, .nav, .brand, .tag, .mono { font-family: var(--font-code); }
.eyebrow::before { content: "// "; opacity: .6; }
.prompt::before { content: "$ "; color: var(--accent); }
.cursor::after { content: "▍"; color: var(--accent); margin-left: 2px; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .cursor::after { animation: none; } }
img, svg { display: block; max-width: 100%; }
a { color: var(--accent); text-underline-offset: 3px; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 .5em; text-wrap: balance; }
h1 { font-size: clamp(2.1rem, 5vw, 3.6rem); letter-spacing: -0.045em; font-weight: 800; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.4rem); letter-spacing: -0.035em; font-weight: 750; }
h3 { font-size: 1.1rem; letter-spacing: -0.01em; }
p { margin: 0 0 1em; text-wrap: pretty; }
code, kbd {
  font: .88em/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: .1em .4em;
}
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 100; }
.skip:focus { left: 8px; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }
@media (max-width: 600px) { :root { --gutter: 16px; } }

.section { padding: clamp(64px, 9vw, 112px) 0; }
.section.alt { background: var(--bg-alt); border-block: 1px solid var(--line); }
.eyebrow {
  display: inline-block;
  font-size: .78rem; font-weight: 650; letter-spacing: .09em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 14px;
}
.lede { font-size: clamp(1.05rem, 1.6vw, 1.25rem); color: var(--muted); max-width: 640px; }
.section-head { max-width: 680px; margin-bottom: 48px; }
.muted { color: var(--muted); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 0 22px;
  border-radius: 12px; border: 1px solid var(--line);
  background: var(--surface); color: var(--fg);
  font-size: .95rem; font-weight: 600; line-height: 1; text-decoration: none; cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, filter .15s ease;
}
.btn:hover { box-shadow: var(--shadow-sm); transform: translateY(-1px); }
.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent; color: #fff;
  box-shadow: 0 6px 20px color-mix(in srgb, var(--accent) 35%, transparent);
}
:root[data-theme="dark"] .btn.primary { color: #0b1020; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn.primary { color: #0b1020; } }
.btn.primary:hover { filter: brightness(1.06); }
.btn svg { width: 20px; height: 20px; flex: none; }
.btn .sub { font-weight: 450; opacity: .8; font-size: .85rem; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.6) blur(14px);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.site-header.scrolled { border-bottom-color: var(--line); }
.site-header .wrap { display: flex; align-items: center; gap: 16px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--fg); text-decoration: none; font-weight: 700; letter-spacing: -0.01em; }
.brand img, .brand svg { width: 30px; height: 30px; }
.brand .crumb { color: var(--muted); font-weight: 500; }
.brand .crumb::before { content: "/"; margin: 0 8px 0 2px; opacity: .5; }
.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav a { color: var(--muted); text-decoration: none; font-size: .95rem; padding: 8px 12px; border-radius: 8px; }
.nav a:hover { color: var(--fg); background: var(--bg-alt); }
.nav .btn { min-height: 38px; padding: 0 16px; font-size: .92rem; margin-left: 6px; }
@media (max-width: 760px) { .nav a:not(.btn) { display: none; } }
@media (max-width: 480px) {
  .site-header .wrap { gap: 8px; }
  .brand { gap: 8px; font-size: .92rem; min-width: 0; }
  .brand .crumb::before { margin: 0 6px 0 0; }
  .nav .btn { padding: 0 12px; margin-left: 0; }
  .theme-toggle { margin-left: 0; }
}
@media (max-width: 480px) { .brand .crumb { display: none; } .nav { margin-left: auto; } }

.theme-toggle {
  width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--surface); color: var(--fg); cursor: pointer;
  display: inline-grid; place-items: center; margin-left: 6px; flex: none;
}
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .i-sun, .theme-toggle .i-moon, .theme-toggle .i-auto { display: none; }
.theme-toggle[data-mode="light"] .i-sun,
.theme-toggle[data-mode="dark"] .i-moon,
.theme-toggle[data-mode="auto"] .i-auto { display: block; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 40px 0 48px; color: var(--muted); font-size: .92rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 24px 40px; align-items: flex-start; justify-content: space-between; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--fg); }
.site-footer .brand { margin-bottom: 8px; }

/* ---------- Cards ---------- */
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow-sm);
}

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }
.no-js .reveal { opacity: 1; transform: none; }

/* ---------- Lightbox (any <a data-lightbox href="big.jpg">) ---------- */
.lightbox { border: 0; padding: 0; background: transparent; max-width: 96vw; max-height: 94vh; }
.lightbox::backdrop { background: rgba(8, 10, 14, .82); backdrop-filter: blur(4px); }
.lightbox img { max-width: 96vw; max-height: 86vh; width: auto; height: auto; border-radius: 10px; box-shadow: 0 20px 60px rgba(0,0,0,.5); margin: 0 auto; }
.lightbox p { color: #e8eaed; text-align: center; font-size: .9rem; margin: 12px 0 0; }
.lightbox button { position: fixed; top: 14px; right: 14px; width: 42px; height: 42px; border-radius: 50%; border: 0; background: rgba(255,255,255,.14); color: #fff; font-size: 1.5rem; cursor: pointer; }
a[data-lightbox] { cursor: zoom-in; }

/* ---------- Forms (download + bug report) ---------- */
.form-page { padding: clamp(40px, 7vw, 80px) 0 clamp(64px, 9vw, 112px); }
.form-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: clamp(28px, 5vw, 64px); align-items: start; }
@media (max-width: 900px) { .form-grid { grid-template-columns: 1fr; } }
.form-card { padding: clamp(22px, 4vw, 34px); }
.fields { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 16px; }
.fields .full { grid-column: 1 / -1; }
@media (max-width: 600px) { .fields { grid-template-columns: 1fr; } }
.fld label, .fld .lbl { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 6px; }
.fld .opt { font-weight: 400; color: var(--muted); }
.fld .hint { font-size: .8rem; color: var(--muted); margin-top: 5px; }
.inp, select.inp, textarea.inp {
  width: 100%; min-height: 46px; padding: 10px 13px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg); color: var(--fg); font: inherit; font-size: 1rem; outline: none; transition: border-color .15s, box-shadow .15s;
}
textarea.inp { min-height: 120px; resize: vertical; line-height: 1.5; }
.inp:focus { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }
.inp[aria-invalid="true"] { border-color: #dc2626; }
.phone { display: flex; gap: 8px; }
.phone select { width: 92px; flex: none; }
.choice { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.choice label { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); cursor: pointer; font-weight: 600; margin: 0; }
.choice label:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.choice input { accent-color: var(--accent); }
.choice svg { width: 20px; height: 20px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: .92rem; color: var(--muted); }
.check input { margin-top: 4px; width: 17px; height: 17px; accent-color: var(--accent); flex: none; }
.check b { color: var(--fg); }
.form-actions { margin-top: 22px; }
.form-actions .btn { width: 100%; min-height: 52px; font-size: 1rem; }
.form-actions .btn[disabled] { opacity: .65; cursor: progress; transform: none; }
.form-msg { margin-top: 14px; padding: 12px 14px; border-radius: 10px; font-size: .92rem; }
.form-msg.err { background: color-mix(in srgb, #dc2626 10%, var(--surface)); border: 1px solid color-mix(in srgb, #dc2626 40%, var(--line)); color: var(--fg); }
.hp { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; overflow: hidden; }
.success { text-align: center; padding: clamp(28px, 5vw, 48px) clamp(18px, 4vw, 32px); }
.success .big { width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; margin: 0 auto 18px; background: color-mix(in srgb, #16a34a 14%, var(--surface)); color: #16a34a; }
.success .big svg { width: 32px; height: 32px; }
.success p { color: var(--muted); }
.side-points { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 14px; }
.side-points li { display: flex; gap: 12px; color: var(--muted); }
.side-points li svg { width: 22px; height: 22px; flex: none; color: var(--accent); margin-top: 2px; }
.side-points b { color: var(--fg); }

/* Trial / licence choice, coupon */
.plans { display: grid; gap: 10px; }
.fld .plan, .plan { display: flex; align-items: center; gap: 12px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--bg); cursor: pointer; margin: 0; }
.plan:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.plan input { accent-color: var(--accent); width: 18px; height: 18px; flex: none; }
.plan span { flex: 1; display: grid; gap: 2px; }
.plan small { color: var(--muted); font-size: .84rem; font-weight: 400; }
.plan em { font: 700 1.05rem/1 var(--font-code); font-style: normal; white-space: nowrap; }
.plan em s { color: var(--muted); font-weight: 500; font-size: .85rem; margin-right: 6px; }
.coupon { display: flex; gap: 8px; }
.coupon .inp { text-transform: uppercase; }
.coupon .btn { flex: none; }
[data-coupon-msg].ok { color: #16a34a; font-weight: 600; }
[data-coupon-msg].bad { color: #dc2626; font-weight: 600; }
.form-actions .fine { font-size: .8rem; color: var(--muted); margin: 10px 0 0; }

.todo { background: #fff3b0; color: #5b4a12; padding: 0 4px; border-radius: 4px; font-weight: 700; }