:root {
  --bg: #070b17;
  --surface: #0f172b;
  --surface-border: #223054;
  --text: #e4ecff;
  --muted: #9db1e1;
  --primary: #4f8cff;
  --primary-strong: #2f74ff;
  --success-bg: #0f2a1d;
  --success-border: #2d8f5b;
  --error-bg: #361016;
  --error-border: #cc415a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Inter', sans-serif;
  background: radial-gradient(circle at top, #101e45 0%, var(--bg) 45%, #04070f 100%);
  color: var(--text);
}

.page {
  width: min(1024px, 92vw);
  margin: 48px auto;
  display: grid;
  gap: 20px;
}

.center-page {
  width: min(760px, 92vw);
  min-height: calc(100vh - 96px);
  display: flex;
  align-items: center;
}

.card {
  background: linear-gradient(180deg, rgba(15, 23, 43, 0.95), rgba(10, 15, 29, 0.98));
  border: 1px solid var(--surface-border);
  border-radius: 18px;
  padding: 28px;
  box-shadow: 0 20px 50px rgba(4, 8, 20, 0.5);
}

.hero-card h1,
.download-card h1,
.not-found-card h1 {
  margin: 6px 0 10px;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
}

.kicker {
  margin: 0;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.74rem;
  font-weight: 700;
}

.subtitle {
  color: var(--muted);
  margin: 0;
  line-height: 1.6;
}

.upload-form {
  margin-top: 26px;
  display: grid;
  gap: 10px;
}

.label {
  font-weight: 600;
}

input[type='file'] {
  width: 100%;
  border: 1px solid var(--surface-border);
  border-radius: 12px;
  padding: 10px;
  background: #0c1325;
  color: var(--text);
}

.hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

button,
.primary-link {
  width: fit-content;
  border: none;
  border-radius: 12px;
  background: linear-gradient(180deg, var(--primary), var(--primary-strong));
  color: #fff;
  padding: 12px 18px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, filter 0.15s ease;
}

button:hover,
.primary-link:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.alert {
  margin-top: 18px;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid transparent;
}

.alert-error {
  background: var(--error-bg);
  border-color: var(--error-border);
}

.links-card h2 {
  margin-top: 0;
}

.link-list {
  margin-top: 20px;
  display: grid;
  gap: 14px;
}

.link-item {
  border: 1px solid var(--surface-border);
  border-radius: 12px;
  padding: 16px;
  background: rgba(11, 18, 35, 0.7);
}

.link-item header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 14px;
}

.link-item h3 {
  margin: 0;
  font-size: 1.02rem;
  word-break: break-all;
}

.field-group {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}

.field-group label {
  font-size: 0.9rem;
  color: var(--muted);
}

.copy-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.copy-row input {
  width: 100%;
  border: 1px solid var(--surface-border);
  border-radius: 10px;
  padding: 10px;
  background: #0b1222;
  color: var(--text);
}

.copy-btn {
  padding: 10px 14px;
  border-radius: 10px;
}

.meta-grid {
  margin: 20px 0;
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.meta-label {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 6px;
}

@media (max-width: 700px) {
  .card {
    padding: 22px;
  }

  .meta-grid {
    grid-template-columns: 1fr;
  }

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

  button,
  .primary-link {
    width: 100%;
    text-align: center;
  }
}