@import url("https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&display=swap");

/* ------------------------------------------------------------------
   Unified modern liquid-glass theme
   Used by all three tool pages (media converter, piano, analyzer).
   ------------------------------------------------------------------ */

:root {
  --bg-1: #0a0a0b;
  --bg-2: #0d0d0f;
  --bg-3: #100f13;
  --accent-1: #ff3b30;
  --accent-2: #ff6a52;
  --accent-3: #ff3b30;
  --signal-green: #4af626;
  --text-strong: #f4f3ef;
  --text-body: #c7c6c0;
  --text-soft: #7c7b73;
  --glass-bg: rgba(255, 255, 255, 0.055);
  --glass-bg-strong: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.16);
  --glass-highlight: rgba(255, 255, 255, 0.6);
  --glass-shadow: 0 18px 50px rgba(0, 0, 0, 0.5);
  --hairline: rgba(255, 255, 255, 0.12);
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --font-display: "JetBrains Mono", "SF Mono", ui-monospace, "Menlo", monospace;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, "Menlo", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  color: var(--text-body);
  font-family: var(--font-display) !important;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 14px;
  line-height: 1.5;
  /* Transparent so the parent (index.html) background shows through
     the iframe seamlessly. */
  background: transparent !important;
}

body {
  padding: 0 !important;
}

/* Override pixel font from xp.css and inline styles in each tool page */
body, .app, .app *, .window, .window *, .window-body, .window-body *,
.title-bar, .title-bar *, .status-bar, .status-bar * {
  font-family: var(--font-display) !important;
  -webkit-font-smoothing: antialiased !important;
}

/* Technical metadata, labels, status + numeric readouts use mono */
.section-title, .status-bar, .status-bar *, .metric-label, .badge,
.title-bar-text, .subtitle, .small, .hint, .tag, .muted,
.status-bar-field, th, .metric-value, .metric-sub {
  font-family: var(--font-mono) !important;
}

/* App container */
.app {
  max-width: 1180px;
  margin: 0 auto;
}

/* Reset xp.css window chrome to modern glass card.
   Window has its own VIBRANT background with bold color blobs and a
   visible dot grid, so glass elements inside can refract visible
   content through their bezels. */
.window {
  position: relative;
  background:
    /* soft desaturated tactical glows (hazard red + steel) */
    radial-gradient(900px 520px at 10% -8%, rgba(255, 59, 48, 0.30) 0%, rgba(255, 59, 48, 0.12) 30%, transparent 64%),
    radial-gradient(780px 520px at 100% 106%, rgba(150, 160, 170, 0.24) 0%, rgba(150, 160, 170, 0.10) 30%, transparent 64%),
    radial-gradient(720px 480px at 92% 4%, rgba(255, 106, 82, 0.16) 0%, transparent 60%),
    /* deep radial base (lighter core, near-black edges) */
    radial-gradient(1200px 900px at 50% 40%, #16161a 0%, #0d0d10 55%, #090909 100%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.16),
    inset 0 -1px 0 rgba(255, 255, 255, 0.05),
    var(--glass-shadow);
  overflow: hidden;
  color: var(--text-body);
}

/* Halftone dot matrix that fades from the edges inward, giving the glass
   bezels high-frequency content to refract without a rigid graph grid. */
.window::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(rgba(255, 255, 255, 0.16) 1px, transparent 1.6px) 0 0 / 15px 15px,
    radial-gradient(rgba(255, 255, 255, 0.10) 1px, transparent 1.4px) 7.5px 7.5px / 15px 15px;
  -webkit-mask-image: radial-gradient(120% 110% at 50% 45%, transparent 30%, #000 92%);
  mask-image: radial-gradient(120% 110% at 50% 45%, transparent 30%, #000 92%);
  opacity: 0.7;
  pointer-events: none;
  z-index: 0;
}

/* Diagonal hazard sweep marker in the top-right corner */
.window::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 220px;
  height: 220px;
  background: repeating-linear-gradient(
    -45deg,
    rgba(255, 59, 48, 0.10) 0,
    rgba(255, 59, 48, 0.10) 8px,
    transparent 8px,
    transparent 20px
  );
  -webkit-mask-image: radial-gradient(circle at 100% 0%, #000 0%, transparent 72%);
  mask-image: radial-gradient(circle at 100% 0%, #000 0%, transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.window > * { position: relative; z-index: 1; }

/* Modern title bar replaces XP chrome */
.title-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px 6px;
  background: transparent !important;
  border: 0 !important;
  color: var(--text-strong) !important;
  min-height: 0 !important;
  height: auto !important;
}

.title-bar-text {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-strong) !important;
  text-shadow: none !important;
}

/* Hide XP min/max/close buttons - not needed in modern look */
.title-bar-controls { display: none !important; }

/* Body of each tool page */
.window-body {
  background: transparent !important;
  border: 0 !important;
  margin: 0 !important;
  padding: 16px 22px 22px !important;
  color: var(--text-body) !important;
  font-size: 14px;
}

.window-body p,
.window-body li,
.window-body label,
.window-body span:not(.tag):not(.badge),
.window-body div { color: var(--text-body); }

.subtitle { color: var(--text-soft); margin: 4px 0 14px; font-size: 13px; }

.section-title {
  color: var(--accent-2) !important;
  font-size: 11px !important;
  font-weight: 700 !important;
  letter-spacing: 0.14em !important;
  text-transform: uppercase;
  margin: 22px 0 10px !important;
  text-shadow: none !important;
}

/* Modern status bar at bottom of each window */
.status-bar {
  display: flex;
  gap: 18px;
  padding: 12px 22px !important;
  background: rgba(255, 255, 255, 0.04) !important;
  border-top: 1px solid var(--glass-border) !important;
  color: var(--text-soft) !important;
}

.status-bar-field {
  font-size: 12px !important;
  color: var(--text-soft) !important;
  font-weight: 400 !important;
  background: transparent !important;
  border: 0 !important;
  padding: 0 !important;
  margin: 0 !important;
  box-shadow: none !important;
}

/* Inputs / selects / textareas */
input[type="text"],
input[type="number"],
input[type="file"],
select,
textarea {
  background: var(--glass-bg) !important;
  border: 1px solid var(--glass-border) !important;
  border-radius: var(--radius-sm) !important;
  padding: 8px 12px !important;
  color: var(--text-body) !important;
  font-size: 13px !important;
  outline: none;
  transition: border-color 0.15s ease, background 0.15s ease;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus,
textarea:focus {
  border-color: rgba(255, 59, 48, 0.55) !important;
  background: var(--glass-bg-strong) !important;
}

select option { background: #101013; color: var(--text-body); }

/* Range slider */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 15px;
  height: 15px;
  border-radius: 3px;
  background: var(--accent-1);
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
  cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 15px;
  height: 15px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 3px;
  background: var(--accent-1);
  cursor: pointer;
}

/* Buttons - liquid glass capsule */
button {
  position: relative;
  border: 1px solid var(--glass-border) !important;
  background: var(--glass-bg) !important;
  color: var(--text-strong) !important;
  font-family: var(--font-mono) !important;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 10px 17px !important;
  border-radius: 999px !important;
  cursor: pointer;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.35),
    inset 0 -1px 0 rgba(255, 255, 255, 0.05),
    0 6px 18px rgba(0, 0, 0, 0.35);
  transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.2s ease;
}
button:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.12) !important;
  transform: translateY(-1px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.5),
    inset 0 -1px 0 rgba(255, 255, 255, 0.08),
    0 10px 24px rgba(0, 0, 0, 0.45);
}
button:active:not(:disabled) { transform: translateY(0); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

/* Drop zones */
.drop-zone {
  border: 1px dashed rgba(255, 255, 255, 0.25) !important;
  background: rgba(255, 255, 255, 0.04) !important;
  border-radius: var(--radius-md) !important;
  padding: 22px 16px !important;
  text-align: center;
  color: var(--text-body);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}
.drop-zone:hover {
  background: rgba(255, 59, 48, 0.07) !important;
  border-color: rgba(255, 59, 48, 0.45) !important;
}
.drop-zone--hover {
  background: rgba(255, 59, 48, 0.11) !important;
  border-color: rgba(255, 59, 48, 0.6) !important;
  transform: scale(1.005);
}
.drop-zone strong { color: var(--text-strong); font-weight: 600; }

/* Logs / pre / monitor */
#log, pre {
  background: rgba(255, 255, 255, 0.04) !important;
  border: 1px solid var(--glass-border) !important;
  border-radius: var(--radius-md) !important;
  color: var(--text-body) !important;
  font-family: var(--font-mono) !important;
  font-size: 12.5px !important;
  padding: 12px 14px !important;
  white-space: pre-wrap;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
#log { height: 220px !important; overflow-y: auto; }

/* Metric cards (analyzer) */
.metric, .meter-block, .helpbox {
  background: var(--glass-bg) !important;
  border: 1px solid var(--glass-border) !important;
  border-radius: var(--radius-md) !important;
  padding: 12px 14px !important;
  color: var(--text-body) !important;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    0 6px 16px rgba(0, 0, 0, 0.25);
}
.metric-label {
  font-size: 10px !important;
  color: var(--text-soft) !important;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.metric-value {
  color: var(--text-strong) !important;
  font-size: 18px !important;
  font-weight: 600;
  margin-top: 4px;
}
.metric-sub { font-size: 11px !important; color: var(--text-soft) !important; }

/* Math collapsible blocks (analyzer) */
.math-block {
  background: rgba(255, 255, 255, 0.04) !important;
  border: 1px solid var(--glass-border) !important;
  border-radius: var(--radius-md) !important;
  padding: 0 !important;
  position: relative;
  overflow: hidden;
  margin: 12px 0 !important;
}
.math-block::before {
  opacity: 0.18 !important;
  filter: saturate(120%);
}
.math-block > summary {
  background: rgba(255, 255, 255, 0.06) !important;
  color: var(--accent-2) !important;
  font-size: 11px !important;
  letter-spacing: 0.14em;
  padding: 12px 16px !important;
  margin: 0 !important;
  border-bottom: 1px solid var(--glass-border) !important;
  cursor: pointer;
}
.math-block > *:not(summary) { padding: 4px 16px; }
.math-block > p:last-child { padding-bottom: 12px; }

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-top: 6px;
  overflow: hidden;
  border-radius: var(--radius-md);
}
th, td {
  background: rgba(255, 255, 255, 0.04) !important;
  border: 0 !important;
  border-bottom: 1px solid var(--glass-border) !important;
  padding: 8px 12px !important;
  color: var(--text-body) !important;
}
th { color: var(--accent-2) !important; font-weight: 600; text-align: left; }
tr:nth-child(even) td { background: rgba(255, 255, 255, 0.02) !important; }
.penalty-pos { color: #fb923c !important; font-weight: 600; }
.penalty-neg, .penalty-zero { color: #6ee7b7 !important; font-weight: 600; }

/* Bar meters */
.bar-bg {
  background: rgba(255, 255, 255, 0.05) !important;
  border: 1px solid var(--glass-border) !important;
  border-radius: 999px !important;
  height: 8px !important;
  overflow: hidden;
}
.bar-fill {
  background: linear-gradient(90deg, #34d399, #f59e0b, #ef4444) !important;
  height: 100% !important;
  border-radius: 999px !important;
}

/* Canvases */
canvas {
  width: 100%;
  background: rgba(0, 0, 0, 0.45) !important;
  border: 1px solid var(--glass-border) !important;
  border-radius: var(--radius-md) !important;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
#loudness-curve { background: rgba(255, 255, 255, 0.06) !important; }

/* Badges */
.badge {
  background: rgba(255, 59, 48, 0.14) !important;
  color: var(--accent-2) !important;
  border: 1px solid rgba(255, 59, 48, 0.34) !important;
  border-radius: 4px !important;
  padding: 2px 9px !important;
  font-size: 10px !important;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* Misc small text styles */
.small, .hint, .tag, .footer-note, .heatmap-caption, .desc, .muted {
  color: var(--text-soft) !important;
  font-size: 12px !important;
}

/* ------------------------------------------------------------------
   Streamlined UX: hide long-form explanatory copy inside the tools.
   Functional labels (.small), controls, inputs, buttons and result
   readouts stay visible.
   ------------------------------------------------------------------ */
.subtitle,
.hint,
.desc,
.helpbox,
.footer-note,
ol.small,
.math-block { display: none !important; }

/* Links */
a { color: var(--accent-1); text-decoration: none; }
a:hover { color: var(--accent-2); text-decoration: underline; }

/* Code */
code {
  background: rgba(255, 255, 255, 0.07);
  padding: 1px 6px;
  border-radius: 6px;
  font-family: "JetBrains Mono", "SF Mono", "Menlo", monospace;
  font-size: 12.5px;
  color: var(--accent-2);
}

/* Field row spacing */
.field-row { margin-bottom: 10px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.controls-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin: 8px 0 4px; }

/* Two column layout used by media converter & piano pages */
.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 22px;
}
@media (max-width: 720px) { .two-column { grid-template-columns: 1fr; } }

/* hr */
hr {
  border: 0;
  border-top: 1px solid var(--glass-border);
  margin: 16px 0;
}

/* Hide xp.css decorations that bleed through */
.window-body::before { display: none !important; }

/* Progress bars */
progress {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  overflow: hidden;
}
progress::-webkit-progress-bar { background: rgba(255, 255, 255, 0.06); border-radius: 999px; }
progress::-webkit-progress-value {
  background: linear-gradient(90deg, var(--accent-1), var(--accent-3));
  border-radius: 999px;
}
progress::-moz-progress-bar {
  background: linear-gradient(90deg, var(--accent-1), var(--accent-3));
  border-radius: 999px;
}

/* MathJax font (preserve serif rendering for equations) */
mjx-container, .mjx-container, mjx-math, .mjx-math {
  color: var(--text-body) !important;
  font-family: "Latin Modern Math", "STIX Two Math", "CMU Serif", serif !important;
  -webkit-font-smoothing: antialiased !important;
}