:root {
  --paper: #F7F3EC;
  --ink: #2E2B28;
  --lake: #B8CCD7;
  --leaf: #AAB89A;
  --gold: #D9B86A;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Paperlogy", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--paper);
  color: var(--ink);
}

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

.header {
  width: min(1120px, calc(100% - 40px));
  margin: 24px auto 0;
  padding: 20px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(16px);
  position: sticky;
  top: 16px;
  z-index: 10;
  box-shadow: 0 12px 40px rgba(46, 43, 40, 0.06);
}

.logo {
  font-weight: 700;
  font-size: 20px;
}

nav {
  display: flex;
  gap: 32px;
  font-size: 15px;
  font-weight: 500;
}

.hero {
  width: min(1120px, calc(100% - 40px));
  margin: 56px auto 40px;
  min-height: 620px;
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  align-items: center;
  gap: 40px;
  position: relative;
}

.eyebrow {
  color: var(--gold);
  font-weight: 700;
  margin-bottom: 18px;
}

h1 {
  font-size: clamp(56px, 8vw, 104px);
  line-height: 1.05;
  margin: 0;
  letter-spacing: -0.05em;
}

.subtitle {
  font-size: 22px;
  line-height: 1.7;
  margin: 28px 0 36px;
  font-weight: 400;
}

.buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  border: 0;
  border-radius: 999px;
  padding: 16px 24px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(46, 43, 40, 0.08);
}

.primary {
  background: var(--gold);
  color: var(--ink);
}

.secondary {
  background: rgba(255, 255, 255, 0.75);
  color: var(--ink);
}

.hero-illustration {
  height: 520px;
  border-radius: 40px;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 70% 20%, rgba(255,255,255,.8), transparent 32%),
    linear-gradient(180deg, #f9f7f1 0%, var(--lake) 48%, var(--leaf) 100%);
  box-shadow: 0 24px 70px rgba(46, 43, 40, 0.12);
}

.lake {
  position: absolute;
  inset: 42% 0 0;
  background:
    repeating-linear-gradient(
      0deg,
      rgba(255,255,255,.28) 0,
      rgba(255,255,255,.28) 2px,
      transparent 2px,
      transparent 18px
    );
  opacity: .8;
}

.diary {
  width: 220px;
  height: 280px;
  background: #eee7dc;
  border-radius: 18px;
  position: absolute;
  right: 72px;
  bottom: 52px;
  transform: rotate(-8deg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 16px;
  box-shadow: 0 20px 50px rgba(46, 43, 40, 0.22);
}

.diary span {
  border: 1px solid rgba(46,43,40,.25);
  padding: 12px 24px;
  background: #faf7ef;
}

.diary strong {
  color: var(--gold);
  font-size: 48px;
}

.features,
.write-section,
.public-section,
.story {
  width: min(1120px, calc(100% - 40px));
  margin: 80px auto;
}

.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card,
.write-section,
.public-section,
.story {
  background: rgba(255, 255, 255, 0.58);
  border-radius: 32px;
  box-shadow: 0 16px 50px rgba(46, 43, 40, 0.06);
}

.feature-card {
  padding: 32px 24px;
  text-align: center;
}

.icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--paper);
  color: var(--ink);
  font-weight: 700;
}

.feature-card h3 {
  margin: 0 0 12px;
  font-size: 22px;
}

.feature-card p {
  margin: 0;
  line-height: 1.7;
  color: rgba(46, 43, 40, 0.72);
}

.write-section,
.public-section {
  padding: 44px;
}

h2 {
  margin: 0 0 24px;
  font-size: 36px;
  letter-spacing: -0.03em;
}

.diary-form {
  display: grid;
  gap: 16px;
}

input,
textarea {
  width: 100%;
  border: 0;
  border-radius: 20px;
  padding: 18px 20px;
  font: inherit;
  background: rgba(255,255,255,.8);
  color: var(--ink);
  outline: none;
}

textarea {
  min-height: 220px;
  resize: vertical;
  line-height: 1.8;
}

.visibility {
  display: flex;
  gap: 20px;
  font-weight: 600;
}

.section-title {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 20px;
  margin-bottom: 24px;
}

.section-title p {
  margin: 0;
  color: rgba(46, 43, 40, 0.65);
}

.diary-list {
  display: grid;
  gap: 14px;
}

.diary-item {
  padding: 22px;
  border-radius: 22px;
  background: rgba(255,255,255,.82);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: center;
}

.diary-item h3 {
  margin: 0 0 8px;
}

.diary-item p {
  margin: 0;
  color: rgba(46, 43, 40, 0.65);
  line-height: 1.6;
}

.hundred-btn {
  border: 1px solid var(--gold);
  background: transparent;
  color: var(--gold);
  border-radius: 999px;
  padding: 12px 18px;
  font-weight: 800;
  cursor: pointer;
}

.comment-box {
  grid-column: 1 / -1;
  display: grid;
  gap: 10px;
  margin-top: 10px;
}

.comment-box input {
  padding: 14px 16px;
}

.comment-list {
  grid-column: 1 / -1;
  display: grid;
  gap: 8px;
  margin-top: 8px;
}

.comment {
  padding: 12px 16px;
  background: var(--paper);
  border-radius: 16px;
  font-size: 14px;
}

.story {
  padding: 56px;
  font-size: 30px;
  line-height: 1.7;
}

.story strong {
  color: var(--gold);
}

footer {
  text-align: center;
  padding: 60px 20px;
  color: rgba(46, 43, 40, 0.55);
}

.fade-up {
  opacity: 0;
  transform: translateY(48px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}

.fade-up.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 820px) {
  .header {
    flex-direction: column;
    gap: 16px;
  }

  nav {
    gap: 18px;
    font-size: 14px;
  }

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

  .hero-illustration {
    height: 360px;
  }

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

  .section-title {
    display: block;
  }
}

@media (max-width: 560px) {
  .features {
    grid-template-columns: 1fr;
  }

  .write-section,
  .public-section,
  .story {
    padding: 28px;
  }

  .diary-item {
    grid-template-columns: 1fr;
  }
}