/* Speaker Design Tools - house style.
   Palette and type drawn from the hardware itself: plywood cabinets, brass
   terminals, vintage meter dials - not a generic app theme. */

@font-face {
  font-family: 'JetBrains Mono';
  src: url('../vendor/fonts/jetbrains-mono-latin-400-normal.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('../vendor/fonts/jetbrains-mono-latin-700-normal.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Public Sans';
  src: url('../vendor/fonts/public-sans-latin-400-normal.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Public Sans';
  src: url('../vendor/fonts/public-sans-latin-500-normal.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Public Sans';
  src: url('../vendor/fonts/public-sans-latin-700-normal.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --color-bg: #eeefe7;
  --color-panel: #f5f6f0;
  --color-ink: #2b2a26;
  --color-ink-muted: #6b6a62;
  --color-border: #d8d2c0;
  --color-accent: #b07a3e;
  --color-accent-strong: #8f5f2c;
  --color-accent-ink: #2b2a26; /* text color to use on top of the accent */
  --color-error: #a3402e;

  --font-sans: 'Public Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --radius: 4px;
  --gutter: 1rem;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1c1815;
    --color-panel: #221d18;
    --color-ink: #ede7dc;
    --color-ink-muted: #a79c8a;
    --color-border: #3e342b;
    --color-accent: #d99a4e;
    --color-accent-strong: #e8b06e;
    --color-accent-ink: #1c1815;
    --color-error: #d97860;
  }
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 56rem;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

a {
  color: var(--color-accent-strong);
}
a:hover {
  color: var(--color-accent);
}

/* --- Site header / nav, shared across pages --- */

.site-header {
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2rem;
}
.site-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
}
.site-header .brand {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  color: var(--color-ink);
}
.site-nav {
  display: flex;
  gap: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}
.site-nav a {
  text-decoration: none;
  color: var(--color-ink-muted);
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
}
.site-nav a:hover {
  color: var(--color-ink);
}
.site-nav a[aria-current='page'] {
  color: var(--color-ink);
  border-bottom-color: var(--color-accent);
}

main > header {
  padding-top: 0.5rem;
  margin-bottom: 1.5rem;
}
main > header h1 {
  margin-bottom: 0.4rem;
}
main > header p {
  color: var(--color-ink-muted);
  max-width: 42rem;
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-ink-muted);
  margin-bottom: 0.75rem;
}
.breadcrumb a {
  color: var(--color-ink-muted);
}
.breadcrumb a:hover {
  color: var(--color-accent-strong);
}

/* --- Panels (fieldsets, chart wrappers): bordered, flat, no card shadows --- */

fieldset,
.panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin: 0 0 1.25rem;
}
legend,
.panel > h2,
.panel > h3 {
  font-family: var(--font-mono);
  font-weight: 700;
  padding: 0 0.4rem;
  font-size: 0.95rem;
}
.panel > h2,
.panel > h3 {
  margin: -2rem 0 1rem -0.4rem;
  display: inline-block;
  background: var(--color-bg);
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: 1rem 1.5rem;
}

label {
  display: block;
  font-weight: 500;
  font-size: 0.92rem;
  margin-bottom: 0.3rem;
}

.hint {
  display: block;
  font-size: 0.8rem;
  color: var(--color-ink-muted);
  margin-top: 0.3rem;
  font-weight: 400;
}

input[type='text'],
input[type='number'],
input[type='file'],
select {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.5rem 0.6rem;
}

select {
  font-family: var(--font-sans);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

button {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: var(--radius);
  padding: 0.6rem 1rem;
  border: 1px solid var(--color-accent-strong);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  cursor: pointer;
}
button.secondary {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-ink);
}
@media (prefers-reduced-motion: no-preference) {
  button {
    transition: background-color 120ms ease, border-color 120ms ease;
  }
}
button:hover {
  border-color: var(--color-accent-strong);
  background: var(--color-accent-strong);
}
button.secondary:hover {
  background: var(--color-panel);
  border-color: var(--color-ink-muted);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.error-text {
  color: var(--color-error);
  font-size: 0.9rem;
}

/* --- Readout: the instrument-panel display for computed results --- */

.readout {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 0.9rem 1.25rem;
  margin-bottom: 1.25rem;
  background: var(--color-panel);
}
.readout-item {
  display: flex;
  flex-direction: column;
}
.readout-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-ink-muted);
}
.readout-value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.4rem;
}
.readout-value small {
  font-weight: 400;
  font-size: 0.85rem;
  color: var(--color-ink-muted);
}

/* --- Chart panels --- */

.chart-panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}
.chart-panel h2,
.chart-panel h3 {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  margin: 0 0 0.75rem;
}

footer {
  padding: 2rem 0;
  color: var(--color-ink-muted);
  font-size: 0.85rem;
}

/* --- Home page tool list --- */

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1rem;
}
.tool-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
}
.tool-card h2 {
  margin-top: 0;
}
.tool-card p {
  color: var(--color-ink-muted);
  flex-grow: 1;
}
.tool-card .button-like,
.tool-card button {
  align-self: flex-start;
}
.button-like {
  display: inline-block;
  text-decoration: none;
  font-family: var(--font-sans);
  font-weight: 500;
  border-radius: var(--radius);
  padding: 0.6rem 1rem;
  border: 1px solid var(--color-accent-strong);
  background: var(--color-accent);
  color: var(--color-accent-ink);
}
.button-like:hover {
  background: var(--color-accent-strong);
  color: var(--color-accent-ink);
}
.button-like.disabled {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-ink-muted);
  cursor: not-allowed;
}