/* stemstudio.jp — the site wears the same face as the plugins.
 *
 * The palette is lifted verbatim from common/gui/ess_panel.cpp: one neutral
 * dark surface for everything, and colour ONLY where there is information —
 * one accent hue per plugin family. The site is "pop" through motion and
 * accent, never through gradients on the furniture; that is the same promise
 * the panels make.
 */

:root {
  --surface: #1b1e23;      /* panel kSurface */
  --raised: #25292f;       /* panel kRaised */
  --raised-2: #2e333b;
  --ink: #ced4dd;          /* panel kInk */
  --ink-dim: #848b96;
  --line: #363c45;

  --eq: #4ea3f2;           /* EQ family */
  --dyn: #f2a33c;          /* dynamics */
  --meter: #57d18c;        /* metering */
  --drive: #f2613c;        /* distortion */
  --time: #37c8d9;         /* time */
  --spatial: #b07cf2;      /* spatial */

  --radius: 10px;
  --font: "Segoe UI", "Hiragino Sans", "Yu Gothic UI", Meiryo, sans-serif;
  --mono: Consolas, "Courier New", monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

/* ---------- chrome ---------- */

header.site {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 1.5rem;
  padding: 0.7rem clamp(1rem, 4vw, 3rem);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
header.site .brand {
  display: flex; align-items: center; gap: 0.5rem;
  font-weight: 700; letter-spacing: 0.04em; color: var(--ink);
  text-decoration: none; font-size: 1.05rem;
}
header.site .brand img { display: block; }
header.site .brand span { color: var(--dyn); }
header.site nav { margin-left: auto; display: flex; gap: 1.1rem; flex-wrap: wrap; }
header.site nav a {
  color: var(--ink-dim); text-decoration: none; font-size: 0.92rem;
  padding: 0.2rem 0; border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
header.site nav a:hover, header.site nav a[aria-current] {
  color: var(--ink); border-bottom-color: var(--dyn);
}

main { max-width: 1080px; margin: 0 auto; padding: 0 clamp(1rem, 4vw, 2rem); }

footer.site {
  margin-top: 6rem; padding: 2.5rem clamp(1rem, 4vw, 3rem);
  border-top: 1px solid var(--line);
  color: var(--ink-dim); font-size: 0.85rem;
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between;
}
footer.site a { color: var(--ink-dim); }

/* ---------- typography ---------- */

h1 { font-size: clamp(1.9rem, 5vw, 3rem); line-height: 1.25; letter-spacing: 0.01em; }
h2 { font-size: clamp(1.35rem, 3vw, 1.8rem); margin: 3.5rem 0 1rem; }
h3 { font-size: 1.1rem; margin: 2rem 0 0.6rem; }
p.lead { font-size: 1.1rem; color: var(--ink); }
p, li { color: var(--ink-dim); }
strong { color: var(--ink); }
a { color: var(--time); }
code { font-family: var(--mono); background: var(--raised); padding: 0.1em 0.4em; border-radius: 4px; font-size: 0.9em; }
hr { border: none; border-top: 1px solid var(--line); margin: 2.5rem 0; }

.accent-eq { color: var(--eq); } .accent-dyn { color: var(--dyn); }
.accent-meter { color: var(--meter); } .accent-drive { color: var(--drive); }
.accent-time { color: var(--time); } .accent-spatial { color: var(--spatial); }

/* ---------- hero ---------- */

.hero {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 3rem;
  align-items: center; padding: 5rem 0 3rem;
}
@media (max-width: 800px) { .hero { grid-template-columns: 1fr; } }
.hero .tagline { color: var(--dyn); font-weight: 600; letter-spacing: 0.12em; font-size: 0.85rem; }
.hero p.lead { margin: 1.2rem 0 2rem; }

.vu-hero { width: 100%; max-width: 420px; margin: 0 auto; display: block; }
.vu-hero .needle {
  transform-origin: 160px 150px;
  animation: vu-swing 3.4s ease-in-out infinite;
}
@keyframes vu-swing {
  0%   { transform: rotate(-44deg); }
  18%  { transform: rotate(12deg); }
  30%  { transform: rotate(-2deg); }
  46%  { transform: rotate(24deg); }
  60%  { transform: rotate(6deg); }
  78%  { transform: rotate(30deg); }
  100% { transform: rotate(-44deg); }
}

/* ---------- buttons ---------- */

.btn {
  display: inline-block; padding: 0.75rem 1.6rem; border-radius: var(--radius);
  font-weight: 600; text-decoration: none; font-size: 1rem;
  transition: transform 0.15s, box-shadow 0.15s, background 0.2s;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--dyn); color: #171307; }
.btn-primary:hover { box-shadow: 0 6px 24px color-mix(in srgb, var(--dyn) 35%, transparent); }
.btn-ghost { border: 1px solid var(--line); color: var(--ink); }
.btn-ghost:hover { border-color: var(--ink-dim); }
.btn-row { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ---------- plugin grid ---------- */

.grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.2rem; margin-top: 1.5rem;
}
.card {
  background: var(--raised); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
  border-top: 3px solid var(--card-accent, var(--line));
}
.card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--card-accent) 60%, var(--line));
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}
.card img { width: 100%; display: block; background: var(--surface); }
.card .body { padding: 0.9rem 1.1rem 1.1rem; }
.card .family { font-size: 0.72rem; letter-spacing: 0.1em; font-weight: 700; color: var(--card-accent); }
.card h3 { margin: 0.15rem 0 0.3rem; font-size: 1.05rem; color: var(--ink); }
.card p { font-size: 0.88rem; line-height: 1.6; margin: 0; }
.card .free {
  float: right; font-size: 0.72rem; font-weight: 700; color: var(--meter);
  border: 1px solid var(--meter); border-radius: 99px; padding: 0 0.55em;
}

/* ---------- stats band ---------- */

.stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem; margin: 2rem 0;
}
.stat {
  background: var(--raised); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.1rem 1.2rem;
}
.stat .n { font-size: 1.6rem; font-weight: 700; color: var(--ink); font-variant-numeric: tabular-nums; }
.stat .n em { font-style: normal; }
.stat .l { font-size: 0.82rem; color: var(--ink-dim); }

/* ---------- price ---------- */

.price-box {
  margin: 3rem 0; padding: 2.5rem; text-align: center;
  background: var(--raised); border: 1px solid var(--line); border-radius: var(--radius);
}
.price-box .price { font-size: 3.4rem; font-weight: 800; color: var(--ink); }
.price-box .price small { font-size: 1.1rem; color: var(--ink-dim); font-weight: 400; }

/* ---------- docs / manual ---------- */

article.doc { max-width: 780px; margin: 3rem auto; }
article.doc h1 { font-size: 1.9rem; margin-bottom: 0.5rem; }
article.doc h2 { border-bottom: 1px solid var(--line); padding-bottom: 0.4rem; }
article.doc table { border-collapse: collapse; margin: 1rem 0; width: 100%; font-size: 0.92rem; }
article.doc th, article.doc td { border: 1px solid var(--line); padding: 0.5rem 0.8rem; text-align: left; }
article.doc th { background: var(--raised); color: var(--ink); }
article.doc blockquote {
  border-left: 3px solid var(--dyn); background: var(--raised);
  padding: 0.8rem 1.2rem; border-radius: 0 var(--radius) var(--radius) 0; margin: 1rem 0;
}
article.doc blockquote p { margin: 0.3rem 0; }
article.doc ul, article.doc ol { padding-left: 1.4rem; margin: 0.7rem 0; }
article.doc img { max-width: 100%; border-radius: var(--radius); border: 1px solid var(--line); }

/* ---------- guide figures ---------- */

figure.shot { margin: 1.5rem 0; }
figure.shot img {
  width: 100%; border-radius: var(--radius); border: 1px solid var(--line);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
}
figure.shot figcaption { font-size: 0.85rem; color: var(--ink-dim); margin-top: 0.5rem; }
.shot-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
@media (max-width: 700px) { .shot-pair { grid-template-columns: 1fr; } }

/* ---------- scroll reveal ---------- */

.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.shown { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .vu-hero .needle { animation: none; transform: rotate(6deg); }
  .btn { transition: none; }
}

/* ---------- forms (admin) ---------- */

.form { max-width: 460px; display: grid; gap: 0.9rem; margin: 2rem 0; }
.form label { font-size: 0.85rem; color: var(--ink-dim); display: grid; gap: 0.3rem; }
.form input {
  background: var(--surface); color: var(--ink); border: 1px solid var(--line);
  border-radius: 6px; padding: 0.6rem 0.8rem; font-size: 1rem; font-family: var(--font);
}
.form input:focus { outline: 2px solid var(--dyn); border-color: transparent; }
.keyout {
  font-family: var(--mono); background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1rem 1.2rem; word-break: break-all;
  font-size: 0.95rem; color: var(--meter);
}
.err { color: var(--drive); }