.portal-container {
  width: 100%;
  max-width: 800px;
  text-align: center;
}

.main-title {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
}

.main-subtitle {
  font-size: 1.1rem;
  color: var(--muted);
  margin-bottom: 3rem;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-bottom: 2rem;
}

.tool-card {
  background: linear-gradient(to bottom right, var(--app-bg-gradient-start), var(--app-bg-gradient-end));
  border: 1px solid var(--shadow-border);
  border-radius: 24px;
  padding: 32px;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at top right, var(--accent-soft), transparent 40%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.tool-card:hover::before {
  opacity: 1;
}

.tool-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  background: rgba(255, 255, 255, 0.1);
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
}

.tool-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 0.5rem 0;
  color: var(--text);
}

.tool-description {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.5;
  margin: 0;
}

.prop-selector {
  position: absolute;
  top: 24px;
  left: 24px;
}

.prop-selector select {
  background: var(--bg-alt);
  backdrop-filter: blur(4px);
  color: var(--text);
  border: 1px solid var(--shadow-border);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 14px;
  cursor: pointer;
  outline: none;
  transition: all 0.2s ease;
}

.prop-selector select:hover {
  background: rgba(30, 41, 59, 0.8);
  border-color: rgba(148, 163, 184, 0.4);
}

.prop-selector select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

/* Contribute Card */
.contribute-card {
  background: linear-gradient(to right, #24292e, #1b1f23);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 24px;
  text-decoration: none;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 3rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
  text-align: left;
}

.contribute-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.contribute-icon {
  color: #fff;
  flex-shrink: 0;
}

.contribute-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
  color: #fff;
}

.contribute-content p {
  font-size: 0.95rem;
  color: #d1d5db;
  margin: 0;
  line-height: 1.4;
}

/* Footer */
.main-footer {
  margin-top: auto;
  padding-top: 2rem;
  padding-bottom: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--muted);
  font-size: 0.9rem;
}

.main-footer a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.main-footer a:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .main-title {
    font-size: 2rem;
  }
  
  .tools-grid {
    grid-template-columns: 1fr;
  }
  
  .prop-selector {
    position: static;
    margin-bottom: 2rem;
    display: inline-block;
  }
}