:root {
  --primary: #1677ef;
  --primary-deep: #166ce5;
  --primary-light: #3187ff;
  --ink: #07162d;
  --soft: #8994a6;
  --surface: rgba(255, 255, 255, 0.82);
  --line: rgba(22, 119, 239, 0.12);
  --shadow: 0 14px 32px rgba(22, 80, 160, 0.1);
  --radius: 16px;
  --font-display: 'Outfit', 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', 'Outfit', sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  background: #dfe5ec;
  line-height: 1.5;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(1100px 520px at 10% -8%, rgba(49, 135, 255, 0.26), transparent 58%),
    radial-gradient(800px 460px at 92% 6%, rgba(22, 108, 229, 0.16), transparent 55%),
    linear-gradient(165deg, #f3faff 0%, #e8f0f8 42%, #dfe5ec 100%);
}

.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(22, 119, 239, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 119, 239, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.5), transparent 88%);
}

.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  pointer-events: none;
}

.bg-orb-a {
  width: 240px;
  height: 240px;
  top: 12%;
  right: 8%;
  background: rgba(49, 135, 255, 0.2);
  animation: drift 14s ease-in-out infinite alternate;
}

.bg-orb-b {
  width: 200px;
  height: 200px;
  bottom: 16%;
  left: 6%;
  background: rgba(22, 108, 229, 0.14);
  animation: drift 18s ease-in-out infinite alternate-reverse;
}

@keyframes drift {
  from {
    transform: translate(0, 0);
  }
  to {
    transform: translate(20px, -14px);
  }
}

.topbar {
  max-width: 1100px;
  margin: 0 auto;
  padding: 22px 24px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.02em;
}

.brand img {
  display: block;
  border-radius: 10px;
  box-shadow: 0 8px 18px rgba(22, 119, 239, 0.2);
}

.tools-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 24px 72px;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.empty {
  margin: 0;
  grid-column: 1 / -1;
  color: var(--soft);
}

.tool-card {
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(16px);
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease, opacity 0.35s ease;
}

.tool-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.tool-card:hover {
  border-color: rgba(22, 119, 239, 0.28);
  box-shadow: 0 18px 36px rgba(22, 80, 160, 0.14);
}

.tool-row {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 14px;
  padding: 18px 16px;
  min-height: 148px;
}

.tool-icon {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  background: linear-gradient(135deg, var(--primary-light), var(--primary-deep));
}

.tool-icon.accent-sky {
  background: linear-gradient(135deg, #4aa3ff, #1677ef);
}
.tool-icon.accent-cyan {
  background: linear-gradient(135deg, #3ec4e8, #1677ef);
}
.tool-icon.accent-indigo {
  background: linear-gradient(135deg, #5b8cff, #166ce5);
}
.tool-icon.accent-teal {
  background: linear-gradient(135deg, #2eb8a6, #1677ef);
}
.tool-icon.accent-slate {
  background: linear-gradient(135deg, #7a8aa3, #4a5b76);
}

.tool-name {
  margin: 0;
  flex: 1;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.35;
}

.tool-actions {
  margin-top: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 11px;
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(120deg, var(--primary-light), var(--primary-deep));
  box-shadow: 0 10px 20px rgba(22, 119, 239, 0.25);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 24px rgba(22, 119, 239, 0.32);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn:disabled,
.btn.is-disabled {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
  pointer-events: none;
}

@media (max-width: 900px) {
  .tools-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .topbar,
  .tools-section {
    padding-left: 16px;
    padding-right: 16px;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .tool-card {
    opacity: 1;
    transform: none;
  }
}