:root {
  --bg: #000000;
  --card: rgba(255, 255, 255, 0.05);
  --card-2: rgba(255, 255, 255, 0.1);
  --border: rgba(255, 255, 255, 0.1);
  --border-soft: rgba(255, 255, 255, 0.15);
  --text: #ffffff;
  --muted: rgba(255, 255, 255, 0.7);
  --muted-2: rgba(255, 255, 255, 0.45);
  --accent: #ddd6fe;
  --button-text: #000000;
  --button-bg: #ffffff;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", sans-serif;
}

body {
  min-height: 100vh;
}

.page {
  min-height: 100vh;
  padding: 40px 16px 56px;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

.hero {
  text-align: center;
  margin-bottom: 40px;
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  background: var(--card-2);
  color: var(--text);
  border-radius: 16px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.16);
  margin-bottom: 16px;
}

.hero-title {
  margin: 0;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.hero-title span {
  display: block;
  margin-top: 10px;
  color: var(--accent);
}

.scheme-card,
.upload-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 32px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.scheme-card {
  margin-bottom: 40px;
  padding: 28px 20px;
}

.scheme {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.scheme-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.scheme-icon-box {
  width: 88px;
  height: 88px;
  border-radius: 24px;
  border: 1px solid var(--border);
  background: var(--card-2);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.24);
}

.scheme-icon-box svg {
  width: 42px;
  height: 42px;
  color: var(--text);
}

.scheme-label {
  margin: 16px 0 0;
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.03em;
}

.scheme-sublabel {
  margin: 6px 0 0;
  font-size: 12px;
  text-transform: lowercase;
  letter-spacing: 0.18em;
  color: var(--muted-2);
}

.scheme-arrow {
  display: none;
  align-items: center;
  justify-content: center;
}

.scheme-line {
  width: 64px;
  height: 1px;
  background: rgba(255, 255, 255, 0.2);
}

.scheme-arrow-icon {
  margin-left: 8px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 20px;
}

.upload-card {
  max-width: 800px;
  margin: 0 auto;
  padding: 24px;
}

.upload-header {
  text-align: center;
}

.upload-header h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.upload-header h2 span {
  display: block;
  margin-top: 6px;
  color: var(--accent);
}

.upload-header p {
  max-width: 680px;
  margin: 14px auto 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.upload-box {
  display: block;
  margin-top: 32px;
  padding: 32px;
  text-align: center;
  cursor: pointer;
  border-radius: 28px;
  border: 1px dashed var(--border-soft);
  background: var(--card);
  transition: background 0.2s ease, transform 0.2s ease;
}

.upload-box:hover {
  background: var(--card-2);
}

.upload-box.dragover {
  background: rgba(255, 255, 255, 0.12);
  transform: scale(1.01);
}

.upload-icon {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  background: var(--card-2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  font-size: 20px;
}

.upload-title {
  margin: 16px 0 0;
  font-size: 16px;
  font-weight: 500;
}

.upload-subtitle {
  margin: 8px 0 0;
  font-size: 14px;
  color: var(--muted);
}

.upload-formats {
  margin: 16px 0 0;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
}

.file-name {
  margin: 16px 0 0;
  font-size: 14px;
  color: var(--accent);
  min-height: 20px;
}

.button-wrap {
  margin-top: 20px;
  display: flex;
  justify-content: center;
}

.button-wrap button {
  border: none;
  border-radius: 999px;
  background: var(--button-bg);
  color: var(--button-text);
  padding: 14px 24px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.button-wrap button:hover {
  transform: translateY(-2px);
}

.button-wrap button:active {
  transform: translateY(0);
}

@media (min-width: 900px) {
  .scheme {
    grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
    align-items: center;
  }

  .scheme-arrow {
    display: flex;
  }

  .scheme-card {
    padding: 36px 32px;
  }
}

@media (max-width: 899px) {
  .scheme-step {
    padding-bottom: 8px;
  }

  .scheme-step:not(:last-child)::after {
    content: "↓";
    display: block;
    margin-top: 16px;
    color: rgba(255, 255, 255, 0.4);
    font-size: 18px;
  }
}

@media (max-width: 640px) {
  .page {
    padding-top: 28px;
    padding-bottom: 40px;
  }

  .scheme-card,
  .upload-card {
    border-radius: 28px;
  }

  .scheme-icon-box {
    width: 80px;
    height: 80px;
  }

  .scheme-label {
    font-size: 20px;
  }

  .upload-card {
    padding: 22px;
  }

  .upload-box {
    padding: 26px 18px;
  }
}