/* Studio design system, mobile-first. Base styles are for phones; larger screens add rules with min-width.
   Built only on the tokens in tokens.css (dashboard repo). Literal values: the 44 px touch target and the
   breakpoints (600 px, 900 px), which the tokens do not cover. */

/* ---------- dark theme (matches the vumography dark surfaces: #1a1a1a background, #232729 cards, #000 bar) ----------
   Overrides only the colour variables. The brand accent and the spacing/type tokens are kept. */
:root {
  --color-canvas: #1a1a1a;
  --color-surface: #232729;
  --color-ink: #f2f2f2;
  --color-slate: #a7adb2;
  --color-line: #3a4044;
  --color-separator: #2e3437;
  --color-bar: #000000;
  --color-on-bar: #ffffff;
  --color-on-bar-muted: #9aa0a8;
  --color-error: #ff6b5b;
}

/* ---------- base (phones first) ---------- */
*, *::before, *::after { box-sizing: border-box; border-radius: var(--radius-none); }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--color-canvas);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-underline-offset: 3px; }
a:hover { color: var(--color-ink); }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
code, pre { font-family: var(--font-mono); }

/* ---------- type ---------- */
.h-page {
  margin: 0 0 var(--spacing-sm);
  font-weight: 400;
  font-size: 30px;
  line-height: 1.05;
  letter-spacing: var(--type-display-tracking);
}
.h-section {
  margin: 0 0 var(--spacing-xs);
  font-weight: 500;
  font-size: 18px;
  line-height: 1.3;
  letter-spacing: -0.01em;
}
.label {
  display: block;
  margin: var(--spacing-md) 0 var(--spacing-xs);
  font-weight: 600;
  font-size: 11px;
  line-height: 1.25;
  letter-spacing: var(--type-label-caps-tracking);
  text-transform: uppercase;
  color: var(--color-slate);
}
.note { margin: var(--spacing-xs) 0 0; font-size: 14px; line-height: 1.5; color: var(--color-slate); }
.error { margin: var(--spacing-sm) 0 0; font-size: 14px; color: var(--color-error); }
.status { margin: var(--spacing-md) 0 0; min-height: 1.5em; font-size: 14px; color: var(--color-ink); }

/* ---------- header: stacked on phones, one row from 600 px ---------- */
.header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bar);
  color: var(--color-on-bar);
  box-shadow: inset 0 -2px 0 var(--color-accent);
}
.header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  min-height: 44px;
  font-weight: 600;
  font-size: 16px;
  letter-spacing: 0.02em;
  color: var(--color-on-bar);
  text-decoration: none;
}
.header__brand::before { content: ""; width: 10px; height: 10px; background: var(--color-accent); }
.header__brand:hover { color: var(--color-on-bar); }
.header__nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-xs) var(--spacing-md);
  width: 100%;
}
.header__nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-weight: 600;
  font-size: 11px;
  letter-spacing: var(--type-label-caps-tracking);
  text-transform: uppercase;
  color: var(--color-on-bar);
  text-decoration: none;
  opacity: 0.8;
  transition: opacity 0.15s ease;
}
.header__nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 8px;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}
.header__nav a:hover, .header__nav a[aria-current="page"] { opacity: 1; color: var(--color-on-bar); }
.header__nav a:hover::after, .header__nav a[aria-current="page"]::after { transform: scaleX(1); }
/* Top row on phones: brand on the left, log out on the right, links below. */
.header__top { display: flex; align-items: center; justify-content: space-between; gap: var(--spacing-sm); width: 100%; }
.header .logout { margin: 0; }

/* ---------- layout ---------- */
.page { width: 100%; margin: 0 auto; padding: var(--spacing-lg) var(--spacing-md) var(--spacing-xl); }
.page--narrow { padding-top: var(--spacing-lg); }
.card {
  position: relative;
  min-width: 0;
  margin: 0 0 var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-surface);
  border: 1px solid var(--color-separator);
  border-top: 2px solid var(--color-ink);
}

/* ---------- controls: 44 px minimum touch target ---------- */
.input {
  display: block;
  width: 100%;
  min-height: 44px;
  padding: 0 var(--spacing-sm);
  border: 1px solid var(--color-line);
  background: var(--color-canvas);
  color: var(--color-ink);
  font: inherit;
  font-size: 16px; /* 16 px stops iOS zooming into the field */
}
.input:hover { border-color: var(--color-slate); }
.input:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 0; border-color: var(--color-accent); }
.input[type="file"] { padding: var(--spacing-xs) 0; border: 0; min-height: 0; }
.input[type="file"]::file-selector-button {
  min-height: 44px;
  margin-right: var(--spacing-sm);
  padding: 0 var(--spacing-md);
  border: 1px solid var(--color-ink);
  background: transparent;
  color: var(--color-ink);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: var(--type-label-caps-tracking);
  text-transform: uppercase;
  cursor: pointer;
}
.button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 44px;
  margin: var(--spacing-sm) 0 0;
  padding: 0 var(--spacing-lg);
  border: 1px solid var(--color-accent);
  background: var(--color-accent);
  color: #fff;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: var(--type-label-caps-tracking);
  text-transform: uppercase;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
}
.button:hover { background: var(--color-ink); border-color: var(--color-ink); color: var(--color-canvas); }
.button:disabled { opacity: 0.4; cursor: not-allowed; background: var(--color-accent); border-color: var(--color-accent); }
/* Secondary: outlined on light surfaces. */
.button--quiet-dark {
  background: transparent;
  border-color: var(--color-ink);
  color: var(--color-ink);
}
.button--quiet-dark:hover { background: var(--color-ink); color: var(--color-canvas); }
/* Outlined on the dark header. */
.button--quiet {
  width: auto;
  min-height: 44px;
  margin: 0;
  padding: 0 var(--spacing-md);
  background: transparent;
  border-color: var(--color-on-bar-muted);
  color: var(--color-on-bar);
}
.button--quiet:hover { background: var(--color-on-bar); border-color: var(--color-on-bar); color: var(--color-bar); }
.button--block { width: 100%; }

.choices { display: flex; flex-direction: column; gap: var(--spacing-xs); margin: var(--spacing-sm) 0 0; padding: 0; border: 0; }
.choice {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  min-height: 44px;
  padding: 0 var(--spacing-sm);
  border: 1px solid var(--color-separator);
  font-size: 15px;
  color: var(--color-ink);
  cursor: pointer;
}
.choice:hover { border-color: var(--color-slate); }
.choice:has(input:checked) { border-color: var(--color-ink); background: var(--color-canvas); }
.choice input { width: 20px; height: 20px; margin: 0; flex: 0 0 auto; accent-color: var(--color-accent); }

/* ---------- lists, chips and output ---------- */
.listing {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  min-height: 44px;
  padding: 0 var(--spacing-sm);
  border-bottom: 1px solid var(--color-separator);
  font-size: 15px;
  word-break: break-word;
  cursor: pointer;
}
.listing:hover { background: var(--color-canvas); }
.listing input { width: 20px; height: 20px; margin: 0; flex: 0 0 auto; accent-color: var(--color-accent); }
.chips { display: flex; flex-wrap: wrap; gap: var(--spacing-xs); list-style: none; margin: var(--spacing-sm) 0 0; padding: 0; }
.chips li {
  max-width: 100%;
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--color-separator);
  background: var(--color-canvas);
  font-size: 13px;
  overflow-wrap: anywhere;
}
.output {
  margin: var(--spacing-md) 0 0;
  padding: var(--spacing-md);
  background: var(--color-bar);
  color: var(--color-on-bar);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}
.result { margin-top: var(--spacing-md); border: 1px solid var(--color-separator); }

/* ---------- login ---------- */
.login-title { margin-bottom: var(--spacing-lg); }
.login-form .button { margin-top: var(--spacing-lg); }

/* ---------- states ---------- */
h3.h-section { margin-top: var(--spacing-md); }

/* ---------- previews ---------- */
.previews { display: grid; grid-template-columns: 1fr; gap: var(--spacing-md); margin-top: var(--spacing-md); }
.previews figure { margin: 0; }
.preview { width: 100%; height: auto; border: 1px solid var(--color-separator); background: var(--color-canvas); }
.previews figcaption { margin-top: var(--spacing-xs); }
@media (min-width: 600px) { .previews { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 900px) { .previews { grid-template-columns: repeat(3, minmax(0, 1fr)); } }

/* ---------- tablet and up (600 px) ---------- */
@media (min-width: 600px) {
  .header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm) var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
  }
  .header__top { display: contents; }
  .header__nav { order: 2; width: auto; margin-left: auto; gap: var(--spacing-xs) var(--spacing-lg); }
  .header .logout { order: 3; margin: 0 0 0 var(--spacing-md); }
  .page { max-width: 760px; padding: var(--spacing-xl) var(--spacing-lg); }
  .page--narrow { max-width: 420px; padding-top: var(--spacing-xl); }
  .card { padding: var(--spacing-lg); }
  .h-page { font-size: 40px; }
  .button { width: auto; display: inline-flex; margin-right: var(--spacing-sm); }
  .button--block { width: 100%; display: flex; margin-right: 0; }
  .output { font-size: 12px; }
}

/* ---------- desktop (900 px) ---------- */
@media (min-width: 900px) {
  .page { max-width: 1080px; padding-top: var(--spacing-xl); }
  .page--narrow { max-width: 440px; }
  .h-page { font-size: 44px; margin-bottom: var(--spacing-lg); }
  .h-section { font-size: 20px; }
  .card { padding: var(--spacing-xl); }
  .card-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-md); align-items: start; }
  .card-grid > .card { margin-bottom: 0; }
  .card-grid--split { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); }
  .card-grid--split > .card { height: 100%; }
  .header { padding: var(--spacing-md) var(--spacing-xl); }
  .header__nav a { font-size: 12px; }
  .input { font-size: 15px; }
  .output { max-height: 360px; }
  .result { max-width: 100%; }
}