:root {
  --paper: #F6F7F8;
  --ink: #1C2130;
  --muted: #4E5566;
  --line: #D5D9E0;
  --voice: #6A2C5C;      /* lessons path: plum */
  --signal: #0F5A63;     /* engineering path: deep teal */
  --panel: #FFFFFF;
  --todo-bg: #FFF4D6;
  --todo-ink: #5C4300;
  --display: "Bricolage Grotesque", "Helvetica Neue", Arial, sans-serif;
  --body: "Source Serif 4", Georgia, "Times New Roman", serif;
  box-sizing: border-box;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #14171F; --ink: #ECEEF2; --muted: #B4BAC6; --line: #333948;
    --voice: #E3A6D4; --signal: #7FD0D8; --panel: #1C2029;
    --todo-bg: #3A3010; --todo-ink: #FFE7A3;
  }
}
:root[data-theme="dark"] {
  --paper: #14171F; --ink: #ECEEF2; --muted: #B4BAC6; --line: #333948;
  --voice: #E3A6D4; --signal: #7FD0D8; --panel: #1C2029;
  --todo-bg: #3A3010; --todo-ink: #FFE7A3;
}
*, *::before, *::after { box-sizing: inherit; }
html { scroll-padding-top: calc(env(safe-area-inset-top, 0px) + 4.5rem); scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--body); font-size: 1.125rem; line-height: 1.65;
}
img { max-width: 100%; }
a { color: inherit; text-underline-offset: 0.18em; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--signal); outline-offset: 3px; border-radius: 2px; }

.skip { position: absolute; left: 1rem; top: -4rem; background: var(--ink); color: var(--paper); padding: .6rem 1rem; z-index: 20; }
.skip:focus { top: calc(env(safe-area-inset-top, 0px) + .5rem); }

/* Header */
.site-head {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10;
  background: var(--paper); border-bottom: 1px solid var(--line);
}
.site-head .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .5rem 1.5rem; padding-block: .8rem; }
.brand { font-family: var(--display); font-weight: 700; font-size: 1.15rem; text-decoration: none; letter-spacing: -0.01em; }
.site-head ul { list-style: none; display: flex; flex-wrap: wrap; gap: .25rem 1.1rem; margin: 0; padding: 0; font-family: var(--display); font-size: .95rem; }
.site-head ul a { text-decoration: none; }
.site-head ul a:hover { text-decoration: underline; }

.wrap { width: min(72rem, 100% - 2.5rem); margin-inline: auto; }
.prose { max-width: 40rem; }

h1, h2, h3 { font-family: var(--display); line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 .6em; }
h2 { font-size: clamp(1.9rem, 4vw, 2.6rem); }
h3 { font-size: 1.3rem; letter-spacing: -0.01em; }

/* Hero */
.hero { padding: clamp(3rem, 8vw, 6rem) 0 2rem; }
.hero h1 { font-size: clamp(3rem, 11vw, 7.5rem); font-weight: 700; line-height: .92; letter-spacing: -0.04em; margin-bottom: .3em; }
.hero .lede { font-size: clamp(1.2rem, 2.2vw, 1.45rem); max-width: 34rem; color: var(--muted); margin: 0; }
.wave { display: block; width: 100%; height: 90px; margin: 2rem 0 0; }
.wave path { fill: none; stroke: var(--ink); stroke-width: 1.5; stroke-linecap: round; }
.wave .v { stroke: var(--voice); }
.wave .s { stroke: var(--signal); }
@media (prefers-reduced-motion: no-preference) {
  .wave path { stroke-dasharray: 3000; stroke-dashoffset: 3000; animation: draw 2.4s ease-out .2s forwards; }
  @keyframes draw { to { stroke-dashoffset: 0; } }
}

/* Testimonials strip */
.praise { display: grid; grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr)); gap: 1.5rem 3rem; padding: 2rem 0 2.5rem; margin: 0; }
.praise blockquote { margin: 0; font-style: italic; font-size: 1.15rem; }
.praise figcaption { font-style: normal; font-family: var(--display); font-size: .95rem; color: var(--muted); margin-top: .4rem; }

/* Paths */
.paths { display: grid; grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr)); gap: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.path { padding: 2.2rem 2rem 2.4rem; }
.path + .path { border-left: 1px solid var(--line); }
@media (max-width: 41rem) { .path + .path { border-left: 0; border-top: 1px solid var(--line); } }
.path h2 { font-size: clamp(1.8rem, 3.5vw, 2.4rem); }
.path.lessons h2 { color: var(--voice); }
.path.mixing h2 { color: var(--signal); }
.path p { margin: 0 0 1.2rem; max-width: 30rem; }
.btn { display: inline-block; font-family: var(--display); font-weight: 500; text-decoration: none; padding: .7rem 1.2rem; border: 2px solid currentColor; margin: 0 .6rem .6rem 0; }
.lessons .btn { color: var(--voice); }
.mixing .btn { color: var(--signal); }
.btn:hover { background: currentColor; }
.lessons .btn:hover span, .mixing .btn:hover span { color: var(--paper); }

/* Sections */
section.block { padding: clamp(3.5rem, 8vw, 6rem) 0; border-bottom: 1px solid var(--line); }
.block .intro { font-size: 1.25rem; color: var(--muted); max-width: 38rem; }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: 2rem 3rem; margin-top: 2.5rem; }
.cols ul { padding-left: 1.1rem; margin: 0; }
.cols li { margin-bottom: .35rem; }
.marker-voice { border-left: 6px solid var(--voice); padding-left: 1.25rem; }
.marker-signal { border-left: 6px solid var(--signal); padding-left: 1.25rem; }

.samples { display: grid; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); gap: 1.25rem; margin-top: 2rem; }
.sample { background: var(--panel); border: 1px solid var(--line); padding: 1.25rem; }
.sample h3 { font-size: 1.1rem; margin-bottom: .3rem; }
.sample p { margin: 0; font-size: 1rem; color: var(--muted); }
.sample audio { display: block; width: 100%; margin-top: .9rem; }

.pubs { list-style: none; padding: 0; margin: 2rem 0 0; max-width: 46rem; }
.pubs li { padding: 1rem 0; border-top: 1px solid var(--line); }
.pubs .where { display: block; font-family: var(--display); font-size: .9rem; color: var(--muted); }

.videos { display: grid; grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr)); gap: 1.5rem; margin-top: 1.25rem; }
.video h4 { font-family: var(--display); font-size: 1rem; font-weight: 500; line-height: 1.3; margin: .6rem 0 0; }
.frame { position: relative; aspect-ratio: 16 / 9; background: var(--line); }
.frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

.todo-unused { background: var(--todo-bg); color: var(--todo-ink); padding: .9rem 1.1rem; font-family: var(--display); font-size: .95rem; margin: 1.2rem 0; max-width: 40rem; }

.contact-mail { font-family: var(--display); font-size: clamp(1.4rem, 4.5vw, 2.4rem); font-weight: 700; letter-spacing: -0.02em; word-break: break-word; }
.links { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; font-family: var(--display); margin: 1.5rem 0 0; }

footer { padding: 2.5rem 0 3rem; font-family: var(--display); font-size: .9rem; color: var(--muted); }

/* Page title on inner pages */
.page-title { padding: clamp(2.5rem, 7vw, 4.5rem) 0 0; }
.page-title h1 { font-size: clamp(2.4rem, 7vw, 4.5rem); line-height: .98; letter-spacing: -0.035em; margin-bottom: .3em; }
.page-title .lede { font-size: clamp(1.15rem, 2vw, 1.35rem); color: var(--muted); max-width: 38rem; margin: 0 0 1rem; }
.page-title.voice h1 { color: var(--voice); }
.page-title.signal h1 { color: var(--signal); }
.site-head ul a[aria-current="page"] { text-decoration: underline; text-decoration-thickness: 2px; }

/* Free download signup */
.signup { margin-top: 1.5rem; max-width: 38rem; background: var(--panel); border: 1px solid var(--line); padding: 1.5rem; }
.signup label { display: block; font-family: var(--display); font-weight: 500; margin-bottom: .4rem; }
.signup .row { display: flex; flex-wrap: wrap; gap: .6rem; }
.signup input[type=email] { flex: 1 1 15rem; font: inherit; font-size: 1.05rem; padding: .7rem .8rem; border: 2px solid var(--muted); background: var(--paper); color: var(--ink); border-radius: 0; }
.signup input[type=email]:focus-visible { outline: 3px solid var(--signal); outline-offset: 2px; }
.signup button { font-family: var(--display); font-weight: 500; font-size: 1rem; padding: .75rem 1.2rem; border: 0; color: #fff; cursor: pointer; }
.signup.voice button { background: #6A2C5C; }
.signup.signal button { background: #0F5A63; }
.signup button:hover { filter: brightness(1.15); }
.signup .small { font-size: .95rem; color: var(--muted); margin: .9rem 0 0; }
h1.sec-h1 { font-size: clamp(2.2rem, 6vw, 3.6rem); line-height: 1; letter-spacing: -0.03em; }