:root {
  color-scheme: dark;
  --page-bg: #07100d;
  --panel-bg: #0d1814;
  --panel-border: rgba(191, 225, 209, 0.16);
  --text: #eef8f3;
  --muted: #a7bbb1;
  --accent: #70d6a8;
  --accent-strong: #3bbf89;
  --button-bg: rgba(7, 16, 13, 0.76);
  --button-hover: rgba(30, 64, 50, 0.92);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  background:
    radial-gradient(circle at 25% 10%, rgba(42, 116, 82, 0.18), transparent 34rem),
    var(--page-bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

.page-shell {
  width: min(1360px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

.page-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 20px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.7rem);
  line-height: 1.08;
}

.subtitle {
  max-width: 760px;
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.viewer-card {
  overflow: hidden;
  border: 1px solid var(--panel-border);
  border-radius: 22px;
  background: var(--panel-bg);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.28);
}

.viewer {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #0b1210;
  outline: none;
  touch-action: none;
}

.viewer:focus-visible {
  box-shadow: inset 0 0 0 3px var(--accent);
}

.canvas-host,
.canvas-host canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.loading-panel {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 30px;
  text-align: center;
  background: rgba(7, 15, 12, 0.82);
  backdrop-filter: blur(8px);
  transition: opacity 180ms ease, visibility 180ms ease;
}

.loading-panel.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-panel.is-error strong {
  color: #ffd2ca;
}

.loading-panel span {
  color: var(--muted);
}

.spinner {
  width: 34px;
  height: 34px;
  border: 3px solid rgba(255, 255, 255, 0.14);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-panel.is-error .spinner {
  display: none;
}

.progress-track {
  width: min(320px, 70%);
  height: 5px;
  margin-top: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
}

.progress-bar {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
  transition: width 120ms ease;
}

.toolbar {
  position: absolute;
  z-index: 3;
  left: 50%;
  bottom: 18px;
  display: flex;
  max-width: calc(100% - 28px);
  gap: 8px;
  padding: 8px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 14px;
  background: rgba(5, 12, 9, 0.68);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.24);
  backdrop-filter: blur(14px);
  transform: translateX(-50%);
}

.control-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 42px;
  padding: 9px 13px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  background: var(--button-bg);
  color: var(--text);
  cursor: pointer;
  user-select: none;
  transition: background 140ms ease, border-color 140ms ease, transform 140ms ease;
}

.control-button:hover {
  border-color: rgba(112, 214, 168, 0.45);
  background: var(--button-hover);
}

.control-button:disabled {
  border-color: rgba(255, 255, 255, 0.07);
  background: rgba(7, 16, 13, 0.45);
  color: rgba(238, 248, 243, 0.42);
  cursor: not-allowed;
  transform: none;
}

.control-button:disabled:hover {
  border-color: rgba(255, 255, 255, 0.07);
  background: rgba(7, 16, 13, 0.45);
}

.control-button:active {
  transform: translateY(1px);
}

.control-button:focus-visible {
  outline: 3px solid rgba(112, 214, 168, 0.5);
  outline-offset: 2px;
}

.control-button.is-active {
  border-color: rgba(112, 214, 168, 0.6);
  background: rgba(38, 109, 79, 0.82);
}

.button-icon {
  font-size: 1.15rem;
  line-height: 1;
}

.file-button {
  position: relative;
}

.viewer-badge {
  position: absolute;
  z-index: 2;
  top: 16px;
  right: 16px;
  padding: 7px 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  background: rgba(5, 12, 9, 0.62);
  color: rgba(238, 248, 243, 0.76);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  backdrop-filter: blur(10px);
}

.drop-hint {
  position: absolute;
  inset: 18px;
  z-index: 6;
  display: grid;
  place-items: center;
  border: 2px dashed var(--accent);
  border-radius: 16px;
  background: rgba(10, 32, 23, 0.88);
  color: var(--text);
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 120ms ease, visibility 120ms ease;
}

.viewer.is-dragging-file .drop-hint {
  opacity: 1;
  visibility: visible;
}

.viewer-help {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  padding: 15px 20px 17px;
  border-top: 1px solid var(--panel-border);
  color: var(--muted);
  font-size: 0.88rem;
}

.viewer-help b {
  color: var(--text);
  font-weight: 600;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 760px) {
  .page-shell {
    width: min(100% - 20px, 1360px);
    padding-top: 22px;
  }

  .toolbar {
    bottom: 10px;
    gap: 5px;
    padding: 6px;
  }

  .control-button {
    min-height: 38px;
    padding: 8px 10px;
  }

  .control-button span:last-child {
    display: none;
  }

  .button-icon {
    font-size: 1.2rem;
  }

  .viewer-badge {
    top: 10px;
    right: 10px;
  }
}

/* ---- Material-Auswahl ---------------------------------------------------- */
.material-panel {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 260px;
  max-height: calc(100% - 96px);
  display: flex;
  flex-direction: column;
  background: rgba(14, 20, 24, 0.92);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.45);
  z-index: 6;
  overflow: hidden;
}
.material-panel[hidden] { display: none; }
.material-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  color: #eaf3ef;
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.mp-close {
  background: none; border: 0; color: #cdd6d2;
  font-size: 1.2rem; line-height: 1; cursor: pointer; padding: 0 4px;
}
.mp-close:hover { color: #fff; }
.material-list { overflow-y: auto; padding: 8px; }
.mp-cat {
  color: #8ea69c; font-size: 0.68rem; text-transform: uppercase;
  letter-spacing: 0.07em; margin: 10px 4px 4px;
}
.swatch {
  display: flex; align-items: center; gap: 9px;
  width: 100%; padding: 6px 8px; margin: 2px 0;
  background: none; border: 1px solid transparent; border-radius: 9px;
  color: #dbe6e1; font-size: 0.82rem; text-align: left; cursor: pointer;
}
.swatch:hover { background: rgba(255, 255, 255, 0.07); }
.swatch.is-active { border-color: #4ade9b; background: rgba(74, 222, 155, 0.12); }
.sw-chip {
  width: 22px; height: 22px; border-radius: 6px; flex: 0 0 auto;
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.35);
}
.sw-chip-reset {
  display: flex; align-items: center; justify-content: center;
  background: rgba(255, 255, 255, 0.08); color: #cdd6d2; font-size: 0.9rem;
}
.sw-label { text-transform: capitalize; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mp-empty { color: #9fb0a9; font-size: 0.8rem; padding: 8px; }
@media (max-width: 560px) {
  .material-panel { width: calc(100% - 28px); max-height: 55%; }
}