/* ============================================================
   BLUE SPIRITS media v2 — 凪デザインシステム
   深い海 × 曇り空。青は癒しの色。呼吸のある余白と、ゆっくりした動き。
   ============================================================ */

:root {
  --sea-deep:   #0A2540;
  --sea:        #1B4B7A;
  --sea-soft:   #2E6DA0;
  --sky:        #7FB8D9;
  --mist:       #F5F8FA;
  --foam:       #FFFFFF;
  --ink:        #12283C;
  --ink-soft:   rgba(18, 40, 60, .62);
  --ink-on-sea: rgba(245, 248, 250, .92);
  --line:       rgba(27, 75, 122, .16);

  --radius: 18px;
  --shadow-soft: 0 8px 32px rgba(10, 37, 64, .10);

  --font-sans:  "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  --font-serif: "Noto Serif JP", "Hiragino Mincho ProN", serif;

  --ease-nagi: cubic-bezier(.23, 1, .32, 1);
  --dur: 1.1s;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 4.2rem; }

body {
  font-family: var(--font-sans);
  font-weight: 300;
  color: var(--ink);
  background: var(--mist);
  line-height: 2;
  letter-spacing: .04em;
  text-wrap: pretty;
  overflow-x: hidden;
}

/* ---------- 背景：凪の海 ---------- */
.sea {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, #DCEBF4 0%, var(--mist) 45%, #E8F1F6 100%);
  overflow: hidden;
}
.sea__layer {
  position: absolute;
  inset: -20%;
  opacity: .35;
  border-radius: 50%;
  filter: blur(60px);
  will-change: transform;
}
.sea__layer--1 { background: radial-gradient(ellipse at 30% 30%, rgba(127,184,217,.5), transparent 60%); animation: drift 26s var(--ease-nagi) infinite alternate; }
.sea__layer--2 { background: radial-gradient(ellipse at 70% 55%, rgba(46,109,160,.35), transparent 55%); animation: drift 34s var(--ease-nagi) infinite alternate-reverse; }
.sea__layer--3 { background: radial-gradient(ellipse at 50% 80%, rgba(27,75,122,.25), transparent 50%); animation: drift 42s var(--ease-nagi) infinite alternate; }

@keyframes drift {
  from { transform: translate3d(-2%, -1%, 0) scale(1); }
  to   { transform: translate3d(2%, 1.5%, 0) scale(1.06); }
}

.sea__light {
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(115deg,
      transparent 0 120px,
      rgba(255,255,255,.14) 120px 122px);
  mix-blend-mode: overlay;
  opacity: .5;
}

/* ---------- ヘッダー ---------- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem clamp(1.25rem, 4vw, 3rem);
  background: linear-gradient(180deg, rgba(245,248,250,.85), rgba(245,248,250,0));
  backdrop-filter: blur(8px);
}
.header__brand {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  letter-spacing: .12em;
  color: var(--sea-deep);
  text-decoration: none;
  white-space: nowrap;
}
.header__brand span { font-weight: 300; opacity: .7; }
.header__nav { display: flex; gap: clamp(.9rem, 2.6vw, 1.9rem); flex-wrap: wrap; }
.header__nav a {
  font-size: .78rem;
  color: var(--ink-soft);
  text-decoration: none;
  transition: color .4s var(--ease-nagi);
  padding: .4rem 0;
}
.header__nav a:hover { color: var(--sea); }

/* ---------- Hero ---------- */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 1.5rem 4rem;
  position: relative;
}
.hero__breath {
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--sea-soft);
  letter-spacing: .22em;
  margin-bottom: 2rem;
  animation: rise 1.6s var(--ease-nagi) both;
}
.hero__title {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(2rem, 5.6vw, 3.8rem);
  line-height: 1.7;
  color: var(--sea-deep);
}
.hero__title span { display: block; }
.hero__title span:first-child { animation: rise 1.6s .3s var(--ease-nagi) both; }
.hero__title span:last-child  { animation: rise 1.6s .7s var(--ease-nagi) both; }
.hero__sub {
  margin-top: 2.2rem;
  color: var(--ink-soft);
  font-size: clamp(.9rem, 1.6vw, 1.02rem);
  animation: rise 1.6s 1.1s var(--ease-nagi) both;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: none; }
}

.hero__scroll {
  position: absolute;
  bottom: 2.2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .6rem;
  text-decoration: none;
}
.hero__scroll-line {
  width: 1px;
  height: 56px;
  background: linear-gradient(180deg, var(--sea-soft), transparent);
  animation: breathe 3.2s ease-in-out infinite;
}
@keyframes breathe {
  0%, 100% { transform: scaleY(.55); opacity: .5; }
  50%      { transform: scaleY(1); opacity: 1; }
}
.hero__scroll-text { font-size: .72rem; letter-spacing: .3em; color: var(--sea-soft); }

/* ---------- 共通 ---------- */
section { padding: clamp(5rem, 12vh, 9rem) clamp(1.25rem, 5vw, 4rem); }

.eyebrow {
  font-size: .74rem;
  letter-spacing: .38em;
  color: var(--sea-soft);
  margin-bottom: 1rem;
}

h2 {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(1.5rem, 3.4vw, 2.2rem);
  color: var(--sea-deep);
  line-height: 1.8;
}

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity var(--dur) var(--ease-nagi), transform var(--dur) var(--ease-nagi);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Pillars（4本柱） ---------- */
.pillars { max-width: 1080px; margin: 0 auto; }
.pillars__head { margin-bottom: 3rem; }
.pillars__note { color: var(--ink-soft); font-size: .9rem; margin-top: .6rem; }
.pillars__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.2rem;
}
.pillar {
  display: flex;
  flex-direction: column;
  gap: .7rem;
  background: rgba(255,255,255,.74);
  border-radius: var(--radius);
  padding: 1.7rem 1.6rem;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 4px 24px rgba(10,37,64,.06);
  transition: transform .8s var(--ease-nagi), background .8s var(--ease-nagi);
}
.pillar:hover { transform: translateY(-4px); background: rgba(255,255,255,.94); }
.pillar__num { font-family: var(--font-serif); color: var(--sky); font-size: .82rem; letter-spacing: .16em; }
.pillar__icon { font-size: 1.6rem; line-height: 1; }
.pillar__name {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--sea-deep);
  letter-spacing: .08em;
}
.pillar__desc { font-size: .86rem; color: var(--ink-soft); line-height: 1.9; }

/* ---------- Places（青い場所カタログ） ---------- */
.places { max-width: 1100px; margin: 0 auto; }
.places__head { margin-bottom: 1.6rem; }
.places__note { color: var(--ink-soft); font-size: .9rem; margin-top: .6rem; }
.places__filter {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin: 1.4rem 0 2rem;
}
.places__filter-btn {
  border: 1px solid var(--line);
  background: rgba(255,255,255,.6);
  color: var(--sea);
  font-family: inherit;
  font-size: .84rem;
  letter-spacing: .1em;
  padding: .5rem 1.1rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background .5s var(--ease-nagi), color .5s var(--ease-nagi);
  min-height: 44px;
}
.places__filter-btn:hover { background: rgba(46,109,160,.12); }
.places__filter-btn.is-active { background: var(--sea); color: var(--foam); border-color: var(--sea); }
.places__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.4rem;
}
.place-card {
  display: flex;
  flex-direction: column;
  gap: .6rem;
  background: rgba(255,255,255,.74);
  border-radius: var(--radius);
  padding: 1.5rem 1.5rem 1.7rem;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 4px 24px rgba(10,37,64,.06);
  transition: transform .8s var(--ease-nagi), box-shadow .8s var(--ease-nagi), opacity .5s var(--ease-nagi);
}
.place-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-soft); }
.place-card.is-hidden { display: none; }
.place-card__type {
  font-size: .7rem;
  letter-spacing: .24em;
  color: var(--sea-soft);
  padding: .18rem .6rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  align-self: flex-start;
}
.place-card__name { font-family: var(--font-serif); font-size: 1.08rem; color: var(--sea-deep); letter-spacing: .04em; }
.place-card__pref { font-size: .78rem; color: var(--ink-soft); }
.place-card__cause { font-size: .84rem; color: var(--ink-soft); line-height: 1.9; }
.places__empty { grid-column: 1 / -1; color: var(--ink-soft); text-align: center; }
.places__noscript { color: var(--ink-soft); }

/* ---------- Articles ---------- */
.articles { max-width: 1100px; margin: 0 auto; }
.articles__head { margin-bottom: 3rem; }
.articles__note { color: var(--ink-soft); font-size: .9rem; margin-top: .6rem; }
.articles__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}
.article-card {
  display: flex;
  flex-direction: column;
  gap: .8rem;
  background: rgba(255,255,255,.72);
  border-radius: var(--radius);
  padding: 1.6rem 1.6rem 1.8rem;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 4px 24px rgba(10,37,64,.06);
  transition: transform .8s var(--ease-nagi), box-shadow .8s var(--ease-nagi);
}
.article-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-soft); }
.article-card__theme {
  font-size: .7rem;
  letter-spacing: .28em;
  color: var(--sea-soft);
}
.article-card__title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.12rem;
  line-height: 1.8;
  color: var(--sea-deep);
}
.article-card__excerpt { font-size: .86rem; color: var(--ink-soft); line-height: 1.9; }
.article-card__date { font-size: .74rem; color: var(--ink-soft); opacity: .7; margin-top: auto; }
.articles__noscript { color: var(--ink-soft); }

/* ---------- Tonight（導線） ---------- */
.tonight { max-width: 880px; margin: 0 auto; text-align: center; }
.tonight__head { margin-bottom: 2.4rem; }
.tonight__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem;
  text-align: left;
  margin-top: 2.4rem;
}
.tonight__card {
  display: flex;
  flex-direction: column;
  gap: .4rem;
  background: rgba(255,255,255,.74);
  border-radius: var(--radius);
  padding: 1.6rem;
  text-decoration: none;
  box-shadow: 0 4px 24px rgba(10,37,64,.06);
  transition: transform .8s var(--ease-nagi), background .8s var(--ease-nagi);
}
.tonight__card:hover { transform: translateY(-3px); background: rgba(255,255,255,.94); }
.tonight__label { font-size: .74rem; letter-spacing: .16em; color: var(--sea-soft); }
.tonight__title { font-family: var(--font-serif); font-size: 1.15rem; color: var(--sea-deep); }

/* ---------- Story（凪について） ---------- */
.story { max-width: 880px; margin: 0 auto; }
.story__inner .eyebrow { margin-bottom: 1rem; }
.story__title, .story h2 { margin-bottom: 1.6rem; }
.story__lead { color: var(--ink-soft); max-width: 34em; }
.story__values {
  list-style: none;
  margin-top: 3rem;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}
.story__values li {
  background: rgba(255,255,255,.72);
  padding: 1.4rem 1.6rem;
  display: flex;
  align-items: baseline;
  gap: 1.2rem;
}
.story__value-word {
  font-family: var(--font-serif);
  color: var(--sea);
  font-size: 1.1rem;
  letter-spacing: .2em;
  min-width: 5em;
}
.story__values li > span:last-child { color: var(--ink-soft); font-size: .92rem; }

/* ---------- Newsletter ---------- */
.newsletter { text-align: center; }
.newsletter__inner { max-width: 620px; margin: 0 auto; }
.newsletter__lead { color: var(--ink-soft); margin: 1.2rem 0 2.4rem; font-size: .94rem; }
.newsletter__form {
  display: flex;
  gap: .8rem;
  background: rgba(255,255,255,.8);
  padding: .6rem;
  border-radius: 999px;
  box-shadow: var(--shadow-soft);
}
.newsletter__form input {
  flex: 1;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: .95rem;
  padding: .8rem 1.2rem;
  color: var(--ink);
  min-width: 0;
}
.newsletter__form input:focus { outline: none; }
.newsletter__form button {
  border: none;
  cursor: pointer;
  background: var(--sea);
  color: var(--foam);
  font-family: inherit;
  font-size: .9rem;
  letter-spacing: .18em;
  padding: .9rem 1.8rem;
  border-radius: 999px;
  transition: background .6s var(--ease-nagi);
  min-height: 44px;
}
.newsletter__form button:hover { background: var(--sea-deep); }
.newsletter__form button:disabled { opacity: .5; cursor: wait; }
.newsletter__status { margin-top: 1.2rem; font-size: .84rem; color: var(--sea-soft); min-height: 1.5em; }

/* ---------- Footer ---------- */
.footer {
  text-align: center;
  padding: 4rem 1.5rem 3rem;
  color: var(--ink-soft);
}
.footer__word {
  font-family: var(--font-serif);
  font-size: .9rem;
  line-height: 2.2;
  color: var(--sea-soft);
  margin-bottom: 2.4rem;
}
.footer__nav { display: flex; justify-content: center; gap: 2rem; margin-bottom: 2rem; flex-wrap: wrap; }
.footer__nav a { color: var(--ink-soft); text-decoration: none; font-size: .82rem; }
.footer__nav a:hover { color: var(--sea); }
.footer small { font-size: .72rem; opacity: .6; }

/* ---------- アクセシビリティ ---------- */
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}
:focus-visible { outline: 2px solid var(--sea-soft); outline-offset: 3px; border-radius: 4px; }

/* ---------- モーション低減 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .sea__layer, .hero__scroll-line { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__breath, .hero__title span, .hero__sub { animation: none; opacity: 1; }
}

/* ---------- モバイル ---------- */
@media (max-width: 720px) {
  .header__nav a:not(:first-child):not(:last-child) { display: none; }
  .header__nav a:first-child, .header__nav a:last-child { display: inline; }
  .newsletter__form { flex-direction: column; border-radius: var(--radius); }
  .newsletter__form button { width: 100%; }
  .pillars__grid { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
}