* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-start: #e8f4fc;
  --bg-mid: #f5e6f0;
  --bg-end: #fdf6e3;
  --text-primary: #3a4a5c;
  --text-secondary: #5a6a7c;
  --accent: #7eb8d8;
  --accent-hover: #a8d4e6;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Avenir", "Avenir Next", -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 200;
  line-height: 1.7;
  color: var(--text-primary);
  min-height: 100vh;
  background: linear-gradient(
    135deg,
    var(--bg-start) 0%,
    var(--bg-mid) 50%,
    var(--bg-end) 100%
  );
  background-attachment: fixed;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

h1 {
  font-size: 3rem;
  font-weight: 200;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  margin-bottom: 3rem;
}

.description {
  margin-bottom: 3rem;
}

.description p {
  margin-bottom: 1.4rem;
  font-size: 1.05rem;
}

.description ul {
  list-style: none;
  margin: 1rem 0 1.4rem 0;
}

.description li {
  position: relative;
  padding-left: 1.2rem;
  margin-bottom: 0.6rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.description li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.shortcuts {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.link-button {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--text-primary);
  padding: 0.6rem 1.4rem;
  font-family: inherit;
  font-weight: 300;
  font-size: 0.9rem;
  cursor: pointer;
  border-radius: 2rem;
  transition: all 0.2s ease;
}

.link-button:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(58, 74, 92, 0.4);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
  z-index: 100;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  position: relative;
  width: 90%;
  max-width: 600px;
  height: 70vh;
  background: #fff;
  border-radius: 1rem;
  box-shadow: 0 20px 60px rgba(58, 74, 92, 0.2);
  overflow: hidden;
}

.modal-close {
  position: absolute;
  top: 0.8rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 1.8rem;
  color: var(--text-secondary);
  cursor: pointer;
  z-index: 10;
  line-height: 1;
}

.modal-close:hover {
  color: var(--text-primary);
}

#modal-frame {
  width: 100%;
  height: 100%;
  border: none;
}