.file-compress-page * {
  box-sizing: border-box;
}

.file-compress-page {
  --main-color: #4f8cff;
  --accent-color: #7c5cff;
  --background-color: #fbfbff;
  --text-color: #24324a;
  --card-color: rgba(255, 255, 255, 0.82);
  --border-color: rgba(130, 150, 180, 0.22);
  --danger-color: #ff6b6b;
  --success-color: #2dd4bf;
  --radius: 22px;
  --base-font-size: 16px;
  --heading-size: 22px;
  --button-height: 44px;
  --button-min-width: 160px;
  --input-height: 44px;
  --gap-size: 16px;
  --page-padding: 20px;
  --app-max-width: 1200px;
  --preview-width: 520px;
  --bg-left-glow: rgba(123, 201, 255, 0.45);
  --bg-right-glow: rgba(255, 160, 214, 0.35);
  --bg-center-glow: rgba(255, 255, 255, 0.9);
  --orb-top-left: rgba(255, 232, 128, 0.7);
  --orb-right: rgba(170, 255, 194, 0.72);
  --orb-bottom-right: rgba(255, 179, 214, 0.72);
  --center-card-color: rgba(255, 255, 255, 0.9);
  --card-shadow: 0 18px 40px rgba(100, 120, 160, 0.14);
  --bg-animation-duration: 22s;
  --card-float-duration: 6.5s;
  --button-hover-duration: 0.22s;
  --card-hover-lift: translateY(-4px);
  --button-hover-lift: translateY(-2px);
  --font-family: 'Mochiy Pop One', sans-serif;

  width: 100%;
  max-width: var(--app-max-width);
  margin: 0 auto;
  padding: var(--page-padding);
  display: flex;
  flex-direction: column;
  gap: var(--gap-size);
  position: relative;
  z-index: 0;
  overflow: hidden;
  border-radius: var(--radius);
  font-family: var(--font-family);
  font-size: var(--base-font-size);
  color: var(--text-color);
  background:
    radial-gradient(circle at 18% 14%, var(--orb-top-left), transparent 18%),
    radial-gradient(circle at 82% 34%, var(--orb-right), transparent 16%),
    radial-gradient(circle at 86% 88%, var(--orb-bottom-right), transparent 18%),
    radial-gradient(circle at center, var(--bg-center-glow), transparent 34%),
    linear-gradient(90deg, var(--bg-left-glow), rgba(255, 255, 255, 0.72) 50%, var(--bg-right-glow));
  background-size:
    100% 100%,
    100% 100%,
    100% 100%,
    100% 100%,
    200% 200%;
  animation: bgShift var(--bg-animation-duration) ease-in-out infinite alternate;
}

.file-compress-page::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 22% 26%, rgba(255, 255, 255, 0.42), transparent 26%),
    radial-gradient(circle at 78% 48%, rgba(255, 255, 255, 0.24), transparent 22%);
  animation: orbDrift 18s ease-in-out infinite alternate;
  pointer-events: none;
}

.file-compress-page::after {
  content: '';
  position: absolute;
  inset: -10%;
  background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.2), transparent 55%);
  filter: blur(24px);
  animation: softPulse 10s ease-in-out infinite alternate;
  pointer-events: none;
}

.file-compress-page .help-button {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--main-color), var(--accent-color));
  color: white;
  font-size: 24px;
  font-weight: 700;
  cursor: pointer;
  z-index: 20;
  box-shadow: 0 10px 24px rgba(79, 140, 255, 0.25);
  transition:
    transform var(--button-hover-duration) ease,
    box-shadow var(--button-hover-duration) ease,
    filter var(--button-hover-duration) ease;
}

.file-compress-page .help-button:hover {
  transform: translateY(-2px);
  filter: brightness(1.03);
  box-shadow: 0 14px 28px rgba(79, 140, 255, 0.3);
}

.file-compress-page .help-modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 30;
}

.file-compress-page .help-modal.open {
  display: flex;
}

.file-compress-page .help-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(20, 28, 44, 0.42);
  backdrop-filter: blur(4px);
}

.file-compress-page .help-dialog {
  position: relative;
  width: min(720px, calc(100vw - 32px));
  max-height: min(84vh, 760px);
  overflow: auto;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--border-color);
  border-radius: calc(var(--radius) + 2px);
  box-shadow: 0 24px 60px rgba(40, 60, 90, 0.24);
  padding: 20px;
}

.file-compress-page .help-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.file-compress-page .help-header h2 {
  margin: 0;
  font-size: var(--heading-size);
}

.file-compress-page .help-close-button {
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 50%;
  background: rgba(36, 50, 74, 0.08);
  color: var(--text-color);
  font-size: 26px;
  cursor: pointer;
}

.file-compress-page .help-body {
  display: grid;
  gap: 12px;
}

.file-compress-page .help-step {
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(79, 140, 255, 0.07);
  border: 1px solid rgba(79, 140, 255, 0.12);
}

.file-compress-page .help-step h3 {
  margin: 0 0 6px;
  font-size: 17px;
}

.file-compress-page .help-step p {
  margin: 0;
  line-height: 1.8;
}

.file-compress-page .help-footer {
  display: flex;
  justify-content: flex-end;
  margin-top: 18px;
}

.file-compress-page .main-grid {
  flex: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--gap-size);
  min-height: 0;
}

.file-compress-page .panel {
  background: var(--center-card-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 16px;
  min-height: 0;
  overflow: auto;
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(12px);
  transform: translateZ(0);
  animation: cardFloat var(--card-float-duration) ease-in-out infinite alternate;
  transition:
    transform var(--button-hover-duration) ease,
    box-shadow var(--button-hover-duration) ease;
}

.file-compress-page .panel:hover {
  transform: var(--card-hover-lift) translateZ(0);
  box-shadow: 0 24px 52px rgba(100, 120, 160, 0.18);
}

.file-compress-page .panel h2 {
  margin: 0 0 12px;
  font-size: var(--heading-size);
}

.file-compress-page .upload-box {
  border: 2px dashed rgba(130, 150, 180, 0.28);
  border-radius: calc(var(--radius) - 4px);
  min-height: 180px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 18px;
  margin-bottom: 16px;
  background: rgba(255, 255, 255, 0.45);
  transition:
    transform var(--button-hover-duration) ease,
    background var(--button-hover-duration) ease,
    border-color var(--button-hover-duration) ease;
}

.file-compress-page .upload-box:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.58);
}

.file-compress-page .upload-box.dragover {
  border-color: var(--main-color);
  background: rgba(123, 201, 255, 0.16);
}

.file-compress-page .upload-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.file-compress-page .button,
.file-compress-page select,
.file-compress-page input[type='range'],
.file-compress-page input[type='file']::file-selector-button {
  height: var(--button-height);
}

.file-compress-page .button,
.file-compress-page input[type='file']::file-selector-button {
  border: none;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--main-color), var(--accent-color));
  color: white;
  padding: 0 18px;
  min-width: var(--button-min-width);
  cursor: pointer;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  white-space: nowrap;
  flex-shrink: 0;
  transform-origin: center;
  transition:
    transform var(--button-hover-duration) ease,
    box-shadow var(--button-hover-duration) ease,
    opacity var(--button-hover-duration) ease,
    filter var(--button-hover-duration) ease;
  box-shadow: 0 8px 18px rgba(79, 140, 255, 0.18);
}

.file-compress-page .button:hover,
.file-compress-page input[type='file']::file-selector-button:hover {
  transform: var(--button-hover-lift);
  filter: brightness(1.02);
  box-shadow: 0 12px 22px rgba(79, 140, 255, 0.22);
}

.file-compress-page .button:active,
.file-compress-page input[type='file']::file-selector-button:active {
  transform: translateY(0);
}

.file-compress-page .button.secondary {
  background: rgba(255, 255, 255, 0.7);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  box-shadow: 0 6px 16px rgba(100, 120, 160, 0.1);
}

.file-compress-page .button.secondary:hover {
  box-shadow: 0 10px 20px rgba(100, 120, 160, 0.14);
}

.file-compress-page .button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.file-compress-page .hidden-file {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.file-compress-page .info-grid {
  display: grid;
  gap: 10px;
}

.file-compress-page .info-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.52);
}

.file-compress-page .info-item span:last-child {
  text-align: right;
  color: rgba(36, 50, 74, 0.9);
  word-break: break-all;
}

.file-compress-page .settings {
  display: grid;
  gap: 12px;
}

.file-compress-page .setting-row {
  display: grid;
  gap: 8px;
}

.file-compress-page .setting-row label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.file-compress-page .setting-row small {
  color: rgba(36, 50, 74, 0.68);
}

.file-compress-page .setting-row input[type='range'],
.file-compress-page .setting-row select {
  width: 100%;
}

.file-compress-page .preview-area {
  display: grid;
  gap: 12px;
}

.file-compress-page .preview-card {
  border: 1px solid rgba(130, 150, 180, 0.2);
  border-radius: 14px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.55);
}

.file-compress-page .preview-card img,
.file-compress-page .preview-card video,
.file-compress-page .preview-label {
  padding: 10px 12px 0;
  font-size: 13px;
  color: rgba(36, 50, 74, 0.72);
}

.file-compress-page .preview-card.result {
  border-color: var(--main-color);
}

.file-compress-page .preview-card audio {
  display: block;
  width: 100%;
}

.file-compress-page .preview-card img {
  max-width: 100%;
  height: auto;
}

.file-compress-page .result-box {
  display: grid;
  gap: 12px;
}

.file-compress-page .result-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.file-compress-page .stat {
  padding: 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.52);
}

.file-compress-page .stat strong {
  display: block;
  font-size: 18px;
  margin-top: 4px;
}

.file-compress-page .notice {
  color: rgba(36, 50, 74, 0.72);
  font-size: 14px;
}

.file-compress-page .progress-box {
  display: grid;
  gap: 10px;
  padding: 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.52);
}

.file-compress-page .progress-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-weight: 700;
}

.file-compress-page .progress-bar {
  width: 100%;
  height: 12px;
  border-radius: 999px;
  background: rgba(130, 150, 180, 0.18);
  overflow: hidden;
}

.file-compress-page .progress-bar-fill {
  width: 0%;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--main-color), var(--accent-color));
  transition: width 0.15s linear;
}

@keyframes bgShift {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 100% 50%;
  }
}

@keyframes orbDrift {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  100% {
    transform: translate3d(1.5%, -1%, 0) scale(1.02);
  }
}

@keyframes softPulse {
  0% {
    opacity: 0.35;
    transform: scale(1);
  }
  100% {
    opacity: 0.65;
    transform: scale(1.03);
  }
}

@keyframes cardFloat {
  0% {
    transform: translateY(0) translateZ(0);
  }
  100% {
    transform: translateY(-3px) translateZ(0);
  }
}

@media (max-width: 900px) {
  .file-compress-page .main-grid {
    grid-template-columns: 1fr;
  }

  .file-compress-page .help-button {
    top: 12px;
    right: 12px;
  }
}