:root {
  --bg: #f2efe8;
  --panel: rgba(249, 246, 240, 0.88);
  --panel-border: rgba(38, 31, 24, 0.12);
  --text: #1f1a16;
  --muted: #6b6257;
  --accent: #d9643a;
  --accent-dark: #a5401f;
  --grid: rgba(31, 26, 22, 0.06);
  --shadow: 0 24px 60px rgba(56, 37, 22, 0.18);
  --frame-shadow: 0 32px 80px rgba(31, 26, 22, 0.28);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(217, 100, 58, 0.12), transparent 28%),
    linear-gradient(180deg, #f8f3e8 0%, var(--bg) 100%);
}

body {
  min-height: 100vh;
}

button,
input {
  font: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 28px 16px;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 3vw, 3.2rem);
  line-height: 0.95;
}

.url-form {
  display: flex;
  gap: 12px;
  align-items: center;
  min-width: min(100%, 680px);
}

.url-form input,
.size-form input {
  width: 100%;
  border: 1px solid rgba(31, 26, 22, 0.12);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.76);
  padding: 14px 16px;
  color: var(--text);
}

.url-form button,
.panel-body button:not(.filter-chip):not(.device-card) {
  border: 0;
  border-radius: 14px;
  padding: 12px 16px;
  background: var(--accent);
  color: #fff8f2;
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease;
}

.url-form button:hover,
.panel-body button:not(.filter-chip):not(.device-card):hover {
  transform: translateY(-1px);
  background: var(--accent-dark);
}

.workspace {
  position: relative;
  flex: 1;
  overflow: hidden;
}

.stage {
  position: relative;
  height: calc(100vh - 112px);
  min-height: 680px;
  overflow: auto;
  padding: 36px;
}

.stage-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.8), transparent);
}

.canvas-toolbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 16px;
  padding: 12px 14px;
  border: 1px solid rgba(31, 26, 22, 0.08);
  border-radius: 18px;
  background: rgba(249, 246, 240, 0.9);
  backdrop-filter: blur(10px);
}

.canvas-zoom-group {
  display: inline-flex;
  gap: 10px;
}

.canvas-zoom-group button {
  border: 1px solid rgba(31, 26, 22, 0.1);
  border-radius: 999px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.8);
  color: var(--text);
  cursor: pointer;
}

.canvas-hint {
  color: var(--muted);
  font-size: 0.9rem;
}

.canvas-scaler {
  position: relative;
  width: 2850px;
  height: 1950px;
}

.canvas-scene {
  position: relative;
  width: 3800px;
  height: 2600px;
  transform-origin: top left;
}

.viewport-shell {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.viewport-meta {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  align-self: flex-start;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(31, 26, 22, 0.72);
  color: #fff8f2;
  font-size: 0.85rem;
}

.viewport-frame {
  position: relative;
  display: inline-block;
  padding: 16px;
  border-radius: 28px;
  background: linear-gradient(180deg, #2f2925 0%, #120f0d 100%);
  box-shadow: var(--frame-shadow);
}

.viewport-frame.is-raw {
  padding: 0;
  border-radius: 18px;
}

.viewport-frame iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  border-radius: 16px;
  background: white;
}

.viewport-frame.is-raw iframe {
  border-radius: 18px;
}

.external-link {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  padding: 8px 12px;
  border-radius: 999px;
  border: 0;
  background: rgba(31, 26, 22, 0.7);
  color: #fff;
  cursor: pointer;
}

.resize-handle {
  position: absolute;
  z-index: 3;
  width: 22px;
  height: 22px;
  border-radius: 8px;
  border: 2px solid rgba(255, 248, 242, 0.8);
  background: var(--accent);
  box-shadow: 0 10px 18px rgba(31, 26, 22, 0.24);
}

.resize-handle::before,
.resize-handle::after {
  content: "";
  position: absolute;
  background: rgba(255, 248, 242, 0.95);
  border-radius: 999px;
}

.resize-handle-ne {
  top: -10px;
  right: -10px;
  cursor: nesw-resize;
}

.resize-handle-ne::before,
.resize-handle-se::before {
  top: 4px;
  right: 4px;
  width: 2px;
  height: 12px;
}

.resize-handle-ne::after,
.resize-handle-se::after {
  right: 4px;
  bottom: 4px;
  width: 12px;
  height: 2px;
}

.resize-handle-se {
  right: -10px;
  bottom: -10px;
  cursor: nwse-resize;
}

.resize-rail {
  position: absolute;
  background: rgba(255, 248, 242, 0.2);
}

.resize-rail-top {
  top: 8px;
  right: 26px;
  width: 90px;
  height: 2px;
}

.resize-rail-right {
  top: 26px;
  right: 8px;
  width: 2px;
  height: 90px;
}

.resize-label {
  position: absolute;
  right: 24px;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(31, 26, 22, 0.62);
  color: #fff8f2;
  font-size: 0.72rem;
  pointer-events: none;
}

.resize-label-top {
  top: -42px;
}

.resize-label-bottom {
  right: 24px;
  bottom: -42px;
}

.floating-panels {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.panel {
  position: absolute;
  z-index: 4;
  pointer-events: auto;
  border: 1px solid var(--panel-border);
  border-radius: 22px;
  background: var(--panel);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(31, 26, 22, 0.08);
  cursor: grab;
}

.panel-header span {
  font-size: 0.8rem;
  color: var(--muted);
}

.panel-body {
  display: grid;
  gap: 14px;
  padding: 16px;
}

.button-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.button-row-two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.size-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.device-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 132px;
  gap: 10px;
}

.device-toolbar input,
.device-toolbar select {
  width: 100%;
  border: 1px solid rgba(31, 26, 22, 0.12);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.76);
  padding: 12px 14px;
  color: var(--text);
}

.filter-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.filter-chip {
  border: 1px solid rgba(31, 26, 22, 0.1);
  border-radius: 999px;
  padding: 10px 12px;
  background: rgba(31, 26, 22, 0.06);
  color: var(--text);
  cursor: pointer;
}

.filter-chip.is-active {
  background: var(--accent);
  color: #fff8f2;
}

.filter-chip:hover,
.device-card:hover {
  transform: translateY(-1px);
}

.device-list {
  display: grid;
  gap: 10px;
  max-height: 420px;
  overflow: auto;
  padding-right: 4px;
}

.device-card {
  display: grid;
  gap: 8px;
  width: 100%;
  text-align: left;
  border: 1px solid rgba(31, 26, 22, 0.08);
  border-radius: 18px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--text);
  cursor: pointer;
}

.device-card-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.device-type {
  font-size: 0.78rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.device-dimensions {
  color: var(--muted);
  font-size: 0.92rem;
}

.device-card.is-active {
  border-color: rgba(169, 64, 31, 0.42);
  background: rgba(217, 100, 58, 0.16);
}

.device-empty {
  color: var(--muted);
  font-size: 0.92rem;
}

.preset {
  background: rgba(31, 26, 22, 0.08);
  color: var(--text);
}

.preset.is-active {
  background: var(--accent);
  color: #fff8f2;
}

.size-form {
  display: grid;
  gap: 12px;
}

.size-form label,
.toggle {
  display: grid;
  gap: 6px;
  font-size: 0.92rem;
}

.toggle {
  grid-template-columns: auto 1fr;
  align-items: center;
}

.compat-card {
  display: grid;
  gap: 10px;
  padding: 14px;
  border-radius: 18px;
  background: rgba(31, 26, 22, 0.05);
  border: 1px solid rgba(31, 26, 22, 0.08);
}

.compat-card ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  color: var(--text);
  font-size: 0.92rem;
}

.hint {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.45;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  z-index: 20;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(31, 26, 22, 0.88);
  color: #fff8f2;
  box-shadow: var(--shadow);
}

@media (max-width: 900px) {
  .stage {
    padding: 20px;
    min-height: calc(100vh - 120px);
  }

  .floating-panels {
    position: static;
    display: grid;
    gap: 16px;
    padding: 0 20px 20px;
    pointer-events: auto;
  }

  .panel {
    position: static;
    width: auto !important;
  }

  .canvas-toolbar {
    position: static;
    align-items: stretch;
    flex-direction: column;
  }

  .canvas-scaler,
  .canvas-scene {
    width: auto;
    height: auto;
  }

  .canvas-scene {
    transform: none !important;
  }

  .viewport-shell {
    position: static;
    margin: 16px 0 24px;
  }

  .button-row {
    grid-template-columns: 1fr;
  }

  .filter-row,
  .size-grid,
  .device-toolbar,
  .button-row-two {
    grid-template-columns: 1fr;
  }

  .url-form {
    min-width: 100%;
    flex-direction: column;
    align-items: stretch;
  }
}