:root {
  color: #eef6ff;
  background: #07111f;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  color: #eef6ff;
  background:
    radial-gradient(circle at 18% 8%, rgba(70, 166, 255, 0.2), transparent 34%),
    radial-gradient(circle at 84% 12%, rgba(123, 109, 255, 0.14), transparent 30%),
    linear-gradient(180deg, rgba(7, 17, 31, 0.96), rgba(7, 17, 31, 0.82)),
    #07111f;
}

body.bg-ready {
  background:
    linear-gradient(180deg, rgba(7, 17, 31, 0.38), rgba(7, 17, 31, 0.74)),
    url("./assets/space-bg.jpg") center top / cover no-repeat fixed,
    #07111f;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 20% 12%, rgba(80, 160, 255, 0.18), transparent 26%),
    radial-gradient(circle at 82% 18%, rgba(110, 190, 255, 0.12), transparent 22%),
    linear-gradient(180deg, rgba(4, 10, 19, 0.16), rgba(4, 10, 19, 0.52));
  pointer-events: none;
}

button,
textarea {
  font: inherit;
}

.app {
  position: relative;
  width: min(100%, 520px);
  margin: 0 auto;
  padding: 20px 16px 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 14px;
  padding: 10px 10px 10px 12px;
  border: 1px solid rgba(200, 230, 255, 0.16);
  border-radius: 12px;
  background: rgba(5, 12, 24, 0.34);
  backdrop-filter: blur(14px);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.18);
}

.brand-logo {
  display: block;
  width: 74px;
  height: auto;
  object-fit: contain;
  flex: 0 0 auto;
  margin-left: auto;
}

.brand-copy {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 0 1 auto;
  min-width: 0;
}

.brand-sprite {
  display: block;
  width: 44px;
  height: 44px;
  object-fit: contain;
  flex: 0 0 auto;
}

.brand-line {
  margin: 0;
  font-weight: 800;
  letter-spacing: 0;
  color: #f7fbff;
}

.brand-line-single {
  font-size: clamp(16px, 3.6vw, 22px);
  line-height: 1.05;
  white-space: nowrap;
}

.copy-panel {
  overflow: hidden;
  border: 1px solid rgba(200, 230, 255, 0.14);
  border-radius: 14px;
  background: rgba(9, 18, 33, 0.52);
  backdrop-filter: blur(18px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.22);
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
  padding: 0 14px;
  border-bottom: 1px solid rgba(200, 230, 255, 0.08);
  color: #dcecff;
  font-size: 14px;
  font-weight: 700;
}

textarea {
  display: block;
  width: 100%;
  min-height: 120px;
  padding: 12px 14px 14px;
  border: 0;
  resize: vertical;
  color: #eef6ff;
  background: transparent;
  line-height: 1.55;
  outline: none;
}

.copy-float {
  display: flex;
  align-items: center;
  justify-content: center;
  width: calc(100% - 24px);
  min-height: 54px;
  margin: 0 12px 14px;
  border: 0;
  border-radius: 12px;
  color: #ffffff;
  background: linear-gradient(135deg, #46a6ff, #7b6dff);
  box-shadow: 0 16px 30px rgba(70, 166, 255, 0.24);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: 0;
}

.copy-float:active {
  transform: translateY(1px);
}

.preview {
  position: relative;
  margin-top: 14px;
  overflow: hidden;
  border: 1px solid rgba(200, 230, 255, 0.14);
  border-radius: 16px;
  background: rgba(9, 18, 33, 0.5);
  backdrop-filter: blur(18px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.22);
}

.preview img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.preview-overlay {
  position: absolute;
  left: 50%;
  top: 44%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: min(88%, 390px);
  min-height: 90px;
  padding: 0 32px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  color: #fff;
  background: rgba(5, 12, 24, 0.62);
  box-shadow:
    0 10px 28px rgba(0, 0, 0, 0.26),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 0;
  text-align: center;
  pointer-events: none;
}

.status {
  min-height: 22px;
  margin: 12px 4px 0;
  color: #b9d8ff;
  font-size: 13px;
  font-weight: 700;
}

.toast {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: none;
  z-index: 9999;
  width: min(78vw, 320px);
  min-height: 72px;
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 18px;
  color: #f8fbff;
  background: rgba(7, 14, 25, 0.94);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.3);
  font-size: 18px;
  font-weight: 800;
  text-align: center;
  display: none;
  align-items: center;
  justify-content: center;
}

.toast.show {
  display: flex;
  animation: toast-pop 1s ease-out both;
}

@keyframes toast-pop {
  0% {
    opacity: 0;
    transform: translate(-50%, -46%) scale(0.96);
  }
  18% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
  80% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(1);
  }
}

@media (max-width: 420px) {
  .app {
    padding: 14px 12px 20px;
  }

  .brand-logo {
    width: 68px;
  }

  .brand-line-single {
    font-size: 18px;
  }

  .brand-sprite {
    width: 40px;
    height: 40px;
  }

  .preview-overlay {
    min-width: 88%;
    min-height: 82px;
    font-size: 22px;
  }

  .copy-float {
    width: calc(100% - 18px);
    margin: 0 9px 12px;
  }
}