Window Glass Generator

/* ---------------------------------------------------------------
   Aero Glass Window — self-contained, zero dependencies.
   Just copy this CSS and the matching HTML; it works on any
   background. Tweak the custom properties on .aero-window to taste.
   --------------------------------------------------------------- */

.aero-window {
  --hue: 210;
  --radius: 8px;
  --glass-opacity: 0.6;
  /* Alpha is baked into the tint so the colour stays vivid while the gloss
     highlights (layered on top) render at full strength. */
  --glass: hsl(var(--hue) 65% 52% / var(--glass-opacity));
  --frame: 9px;

  position: relative;
  isolation: isolate;
  width: 520px;
  border-radius: var(--radius);
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, system-ui, sans-serif;
  font-size: 12px;
  color: #1b1b1b;
  box-shadow:
    0 18px 44px rgba(0, 0, 0, 0.5),
    0 0 26px hsl(var(--hue) 90% 58% / 0.28),
    0 0 0 1px rgba(0, 0, 0, 0.55),
    inset 0 0 0 1px rgba(255, 255, 255, 0.95),
    inset 0 0 30px rgba(255, 255, 255, 0.28);
}

/* Colored glass sheet — vivid tint + specular gloss + diagonal sheen */
.aero-window::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: var(--radius);
  background:
    /* diagonal reflection streak */
    linear-gradient(104deg, transparent 26%, rgba(255, 255, 255, 0.32) 42%, rgba(255, 255, 255, 0.05) 50%, transparent 64%),
    /* bright top specular highlight */
    linear-gradient(to bottom, rgba(255, 255, 255, 0.68), rgba(255, 255, 255, 0.2) 42%, rgba(255, 255, 255, 0) 54%),
    /* soft vertical shade for depth */
    linear-gradient(to bottom, rgba(255, 255, 255, 0.12), rgba(0, 0, 0, 0.12)),
    /* colored glass tint */
    var(--glass);
}

/* Frost whatever sits behind the window — the effect that makes it glass */
.aero-window::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  border-radius: var(--radius);
  -webkit-backdrop-filter: blur(18px) saturate(1.9);
  backdrop-filter: blur(18px) saturate(1.9);
}

/* ---- Title bar ---- */
.aero-window .aero-titlebar {
  display: flex;
  align-items: flex-start;
  gap: 5px;
  padding: 0 6px;
  min-height: 30px;
  border-radius: var(--radius) var(--radius) 0 0;
  /* faint self-contained brushed sheen */
  background: repeating-linear-gradient(
    108deg,
    rgba(255, 255, 255, 0.05) 0 1px,
    transparent 1px 5px
  );
}

.aero-window .aero-titlebar-icon {
  width: 16px;
  height: 16px;
  margin-top: 7px;
  flex: none;
}

.aero-window .aero-titlebar-text {
  flex: 1;
  min-width: 0;
  margin-top: 7px;
  line-height: 16px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: #0b0b0b;
  /* white halo keeps the caption legible over any glass color */
  text-shadow: 0 0 4px #fff, 0 0 4px #fff, 0 0 7px #fff, 0 0 10px #fff;
}

/* ---- Caption buttons (capsule hanging from the top edge) ---- */
.aero-window .aero-caption {
  display: flex;
  flex: none;
  border: 1px solid rgba(0, 0, 0, 0.35);
  border-top: 0;
  border-radius: 0 0 4px 4px;
  overflow: hidden;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.9),
    1px 0 0 rgba(255, 255, 255, 0.7),
    -1px 0 0 rgba(255, 255, 255, 0.7);
}

.aero-window .aero-caption button {
  appearance: none;
  -webkit-appearance: none;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 29px;
  height: 20px;
  margin: 0;
  padding: 0;
  border: 0;
  border-right: 1px solid rgba(0, 0, 0, 0.28);
  color: rgba(0, 0, 0, 0.68);
  cursor: pointer;
  background: linear-gradient(
    rgba(255, 255, 255, 0.55),
    rgba(255, 255, 255, 0.28) 46%,
    rgba(0, 0, 0, 0.08) 50%,
    rgba(0, 0, 0, 0.08) 78%,
    rgba(255, 255, 255, 0.4)
  );
  transition: box-shadow 0.12s ease, background 0.12s ease, color 0.12s ease;
}

.aero-window .aero-caption button:last-child {
  border-right: 0;
  min-width: 46px;
}

/* Glyphs drawn in pure CSS — no icon font, no images */
.aero-window .aero-caption .min::before {
  content: "";
  width: 10px;
  height: 2px;
  margin-top: 6px;
  background: currentColor;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.4);
}
.aero-window .aero-caption .max::before {
  content: "";
  width: 11px;
  height: 9px;
  border: 1px solid currentColor;
  border-top-width: 2px;
}
.aero-window .aero-caption .close::before {
  content: "\2715";
  font-size: 11px;
  line-height: 1;
}

/* Hover / active — cyan Aero glow for min & max */
.aero-window .aero-caption button:not(.close):hover {
  color: #fff;
  background:
    radial-gradient(120% 90% at 50% 130%, #3fd0e6, transparent 60%),
    linear-gradient(#c3e3f4 48%, #1f79b0 50%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.9), 0 0 8px 2px rgba(93, 196, 240, 0.85);
}
.aero-window .aero-caption button:not(.close):active {
  background:
    radial-gradient(120% 90% at 50% 130%, #12e6e6, transparent 60%),
    linear-gradient(#8fb3c9 48%, #0d3350 50%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.8);
}

/* Close button — red */
.aero-window .aero-caption .close {
  color: #fff;
  background:
    radial-gradient(circle at -30% 50%, rgba(0, 0, 0, 0.4) 6%, transparent 55%),
    radial-gradient(circle at 130% 50%, rgba(0, 0, 0, 0.4) 6%, transparent 55%),
    linear-gradient(#e6a99f, #d16b5b 48%, #cf4b34 50%, #d8654c);
}
.aero-window .aero-caption .close:hover {
  background:
    radial-gradient(120% 90% at 50% 130%, #ff9a86, transparent 60%),
    linear-gradient(#ffc0b5 48%, #d40a0a 50%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.9), 0 0 8px 2px rgba(255, 80, 48, 0.85);
}
.aero-window .aero-caption .close:active {
  background:
    radial-gradient(120% 90% at 50% 130%, #ff3a1a, transparent 60%),
    linear-gradient(#c94a3a 48%, #8b0000 50%);
}

/* ---- Menu bar ---- */
.aero-window .aero-menubar {
  display: flex;
  align-items: stretch;
  margin: 0 var(--frame);
  background: linear-gradient(#ffffff 0%, #eef2f9 45%, #dbe3f1 55%, #e9eef8 100%);
  border: 1px solid rgba(0, 0, 0, 0.35);
  border-bottom: 0;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
}
.aero-window .aero-menubar span {
  padding: 4px 10px;
  cursor: default;
  color: #1b1b1b;
}
.aero-window .aero-menubar span:hover {
  background: linear-gradient(#eaf4fd, #cfe8fb);
  box-shadow: inset 0 0 0 1px #b5dcfb;
  border-radius: 3px;
}

/* ---- Content area ---- */
.aero-window .aero-body {
  margin: 0 var(--frame);
  padding: 12px;
  min-height: 289px;
  background: #f0f0f0;
  color: #1b1b1b;
  border: 1px solid rgba(0, 0, 0, 0.5);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.7);
  white-space: pre-wrap;
  overflow: auto;
}
.aero-window .aero-body:last-child {
  margin-bottom: var(--frame);
  border-radius: 0 0 3px 3px;
}

/* ---- Status bar ---- */
.aero-window .aero-statusbar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 var(--frame) var(--frame);
  padding: 3px 8px;
  min-height: 24px;
  font-size: 11px;
  color: #1b1b1b;
  background: linear-gradient(#f7f9fc, #e4e9f2);
  border: 1px solid rgba(0, 0, 0, 0.4);
  border-top: 0;
  border-radius: 0 0 3px 3px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.85);
}
.aero-window .aero-statusbar .aero-status-grow {
  flex: 1;
}
/* Resize gripper (bottom-right dots) */
.aero-window .aero-statusbar .aero-gripper {
  width: 12px;
  height: 12px;
  background:
    radial-gradient(circle 1px at 2px 10px, rgba(0, 0, 0, 0.35) 99%, transparent),
    radial-gradient(circle 1px at 6px 10px, rgba(0, 0, 0, 0.35) 99%, transparent),
    radial-gradient(circle 1px at 10px 10px, rgba(0, 0, 0, 0.35) 99%, transparent),
    radial-gradient(circle 1px at 6px 6px, rgba(0, 0, 0, 0.35) 99%, transparent),
    radial-gradient(circle 1px at 10px 6px, rgba(0, 0, 0, 0.35) 99%, transparent),
    radial-gradient(circle 1px at 10px 2px, rgba(0, 0, 0, 0.35) 99%, transparent);
}

/* ---- Inactive (unfocused) window ---- */
.aero-window.inactive::before {
  background:
    linear-gradient(rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.08) 44%, rgba(255, 255, 255, 0) 46%),
    hsl(var(--hue) 14% 84%);
  opacity: 0.82;
}
.aero-window.inactive .aero-titlebar-text {
  color: #5a5a5a;
  text-shadow: 0 0 4px #fff, 0 0 6px #fff;
}