* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: #f6f7fb;
  background:
    radial-gradient(circle at top left, rgba(255, 180, 0, .12), transparent 35%),
    radial-gradient(circle at bottom right, rgba(0, 145, 255, .10), transparent 35%),
    #090b10;
}

a {
  color: inherit;
}

.topbar {
  width: min(1180px, calc(100% - 32px));
  margin: 20px auto 0;
  padding: 22px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 22px;
  box-shadow: 0 18px 55px rgba(0,0,0,.28);
  backdrop-filter: blur(12px);
}

.topbar h1 {
  margin: 0;
  font-size: clamp(24px, 4vw, 42px);
  letter-spacing: -.04em;
}

.topbar p {
  margin: 6px 0 0;
  color: #aeb7ca;
}

.topbar nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn, .form button, .upload-form button, .copy-btn, .delete-btn {
  border: 0;
  padding: 11px 15px;
  border-radius: 12px;
  background: linear-gradient(135deg, #ffcc45, #ff8a00);
  color: #111;
  text-decoration: none;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(255, 171, 0, .22);
}

.btn.secondary {
  background: rgba(255,255,255,.10);
  color: #fff;
  box-shadow: none;
}

.btn.danger, .delete-btn {
  background: linear-gradient(135deg, #ff4d4d, #b40000);
  color: #fff;
}

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 22px auto 50px;
}

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card, .upload-box, .empty, .admin-list {
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.11);
  border-radius: 22px;
  box-shadow: 0 18px 55px rgba(0,0,0,.32);
  backdrop-filter: blur(12px);
}

.login-card {
  width: min(430px, 100%);
  padding: 28px;
}

.brand-badge {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 196, 55, .15);
  color: #ffd166;
  font-weight: 900;
  letter-spacing: .08em;
  font-size: 12px;
}

.login-card h1, .upload-box h2, .admin-list h2 {
  margin: 12px 0 8px;
}

.login-card p, .upload-box p {
  margin: 0 0 18px;
  color: #aeb7ca;
  line-height: 1.6;
}

.form {
  display: grid;
  gap: 10px;
}

.form label {
  color: #dce4f7;
  font-weight: 700;
  font-size: 13px;
}

.form input, .upload-form input[type=file] {
  width: 100%;
  padding: 13px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.15);
  background: rgba(0,0,0,.24);
  color: #fff;
  outline: none;
}

.form button, .upload-form button {
  margin-top: 8px;
  width: 100%;
}

.back-link {
  display: inline-block;
  margin-top: 18px;
  color: #ffd166;
  text-decoration: none;
  font-weight: 700;
}

.alert {
  padding: 12px 14px;
  border-radius: 14px;
  margin-bottom: 16px;
  font-weight: 700;
}

.alert.error {
  background: rgba(255, 70, 70, .12);
  border: 1px solid rgba(255, 70, 70, .25);
  color: #ffb3b3;
}

.alert.success {
  background: rgba(0, 220, 130, .12);
  border: 1px solid rgba(0, 220, 130, .25);
  color: #9dffd5;
}

.upload-box {
  padding: 22px;
  margin-bottom: 24px;
}

.upload-form {
  display: grid;
  grid-template-columns: 1fr 210px;
  gap: 12px;
  align-items: center;
}

.empty {
  padding: 50px 22px;
  text-align: center;
  color: #aeb7ca;
}

.empty h2 {
  color: #fff;
  margin-top: 0;
}

.empty.small {
  padding: 24px;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.image-card {
  overflow: hidden;
  border-radius: 18px;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.11);
  box-shadow: 0 12px 28px rgba(0,0,0,.22);
}

.image-card img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
  background: rgba(255,255,255,.06);
}

.image-info {
  padding: 13px;
}

.image-info strong {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.image-info small {
  display: block;
  margin: 6px 0 10px;
  color: #aeb7ca;
}

.copy-btn {
  width: 100%;
  padding: 9px 10px;
  font-size: 13px;
}

.card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.card-actions form {
  margin: 0;
}

.delete-btn {
  width: 100%;
  padding: 9px 10px;
  font-size: 13px;
}

.hash-output {
  white-space: pre-wrap;
  word-break: break-word;
  margin-top: 16px;
  padding: 14px;
  border-radius: 14px;
  background: rgba(0,0,0,.35);
  color: #9dffd5;
}

@media (max-width: 760px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .upload-form {
    grid-template-columns: 1fr;
  }

  .topbar nav, .btn {
    width: 100%;
  }

  .topbar nav .btn {
    text-align: center;
  }
}