/* =========================================================
   さんぽと自分なら — static stylesheet
   Palette: warm paper + moss green (a walking trail down
   the page connects each stop, like a route on a map)
   ========================================================= */

:root {
  --paper:        #F7F4EC;
  --surface:       #FFFFFF;
  --ink:           #2B2924;
  --ink-soft:      #6B6656;
  --moss:          #7C9469;
  --moss-deep:     #4E6B44;
  --moss-pale:     #E3EAD9;
  --line:          #E2DCCB;
  --shadow:        0 12px 28px -18px rgba(43, 41, 36, 0.35);

  --font-display:  "Shippori Mincho", serif;
  --font-body:      "Zen Kaku Gothic New", "Hiragino Sans", sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(124, 148, 105, 0.10), transparent 42%),
    radial-gradient(circle at 88% 18%, rgba(124, 148, 105, 0.07), transparent 38%),
    radial-gradient(circle at 50% 92%, rgba(78, 107, 68, 0.06), transparent 45%),
    url("data:image/svg+xml;base64,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");
  background-repeat: no-repeat, no-repeat, no-repeat, repeat;
  background-size: auto, auto, auto, 260px 260px;
  background-attachment: fixed, fixed, fixed, fixed;
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  height: min(60vh, 420px);
  min-height: 280px;
  overflow: hidden;
}

.hero-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.02);
  will-change: transform;
}

.hero-veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(20, 24, 16, 0.15) 0%,
    rgba(20, 24, 16, 0.15) 45%,
    rgba(20, 24, 16, 0.72) 100%
  );
}

.hero-text {
  position: absolute;
  bottom: 28px;
  left: 0;
  right: 0;
  padding: 0 24px;
  text-align: center;
  color: #FBFAF4;
}

.hero-eyebrow {
  margin: 0 0 6px;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.28em;
  color: #D9E4CB;
}

.hero-text h1 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 6vw, 42px);
  letter-spacing: 0.04em;
}

.hero-location {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: #E6E3D6;
}

/* ---------- Entrance animations ---------- */

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

.reveal-fade {
  opacity: 0;
  animation: fadeUp 0.8s cubic-bezier(0.16, 0.8, 0.3, 1) forwards;
  animation-delay: var(--d, 0s);
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 0.8, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 0.8, 0.3, 1);
}

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

/* ---------- Page shell ---------- */

.page {
  max-width: 640px;
  margin: 0 auto;
  padding: 36px 22px 80px;
}

/* ---------- Table of contents ---------- */

.toc {
  background: var(--moss-pale);
  border-radius: 18px;
  padding: 22px 24px 24px;
  margin-bottom: 56px;
}

.toc-label {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.12em;
  color: var(--moss-deep);
}

.toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc li + li {
  margin-top: 10px;
}

.toc a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-size: 14.5px;
  padding: 7px 0;
}

.toc-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--moss);
}

.toc a:hover .toc-dot {
  background: var(--moss-deep);
}

/* ---------- Walking timeline ---------- */

.timeline {
  position: relative;
  margin-left: 8px;
  padding-left: 30px;
  border-left: 2px dashed #CBD6BC;
}

.stop {
  position: relative;
  margin-bottom: 60px;
}

.stop:last-child {
  margin-bottom: 0;
}

.stop::before {
  content: "";
  position: absolute;
  left: -39px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--moss);
  border: 3px solid var(--paper);
  box-shadow: 0 0 0 2px var(--moss);
  transform: scale(0);
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) 0.15s;
}

.stop.is-visible::before {
  transform: scale(1);
}

.stop-end::before {
  border-radius: 3px;
  background: var(--moss-deep);
  box-shadow: 0 0 0 2px var(--moss-deep);
}

.stop-index {
  margin: 0 0 6px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--moss-deep);
  font-weight: 500;
}

.stop h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.stop p {
  margin: 0;
  font-size: 15px;
  color: var(--ink);
}

.stop p + p {
  margin-top: 12px;
}

/* photos */

.photo-single,
.photo-pair {
  margin: 0 0 18px;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.photo-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}

.photo-single img,
.photo-pair img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 0.8, 0.3, 1);
}

.photo-single:hover img,
.photo-pair:hover img {
  transform: scale(1.045);
}

/* ---------- Back to top ---------- */

.back-top {
  display: block;
  width: fit-content;
  margin: 70px auto 0;
  padding: 12px 30px;
  background: var(--moss-pale);
  color: var(--moss-deep);
  border-radius: 999px;
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.06em;
  transition: background 0.2s ease, color 0.2s ease;
}

.back-top:hover {
  background: var(--moss);
  color: #fff;
}

/* ---------- Responsive ---------- */

@media (max-width: 420px) {
  .photo-pair {
    grid-template-columns: 1fr;
  }
  .photo-single img,
  .photo-pair img {
    height: 200px;
  }
  .timeline {
    padding-left: 24px;
  }
  .stop::before {
    left: -33px;
  }
}

@media (min-width: 720px) {
  .page {
    padding-top: 56px;
  }
  .toc {
    padding: 26px 30px 28px;
  }
}

/* ---------- Floating back-to-top button ---------- */

.fab-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: none;
  background: var(--moss-deep);
  color: #fff;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 10px 24px -10px rgba(43, 41, 36, 0.5);
  opacity: 0;
  transform: translateY(12px) scale(0.9);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease, background 0.2s ease;
  z-index: 40;
}

.fab-top.show {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.fab-top:hover {
  background: var(--moss);
}

/* ---------- Keyboard focus ---------- */

.toc a:focus-visible,
.back-top:focus-visible,
.fab-top:focus-visible {
  outline: 2px solid var(--moss-deep);
  outline-offset: 3px;
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal-fade,
  .reveal,
  .stop::before,
  .hero-photo,
  .photo-single img,
  .photo-pair img,
  .fab-top {
    animation: none !important;
    transition: none !important;
  }
  .reveal-fade,
  .reveal {
    opacity: 1;
    transform: none;
  }
  .stop::before {
    transform: scale(1);
  }
}