/* ============================================================
   LUSSO不動産 ／ 東京23区の賃貸仲介
   Neutral paper ground, indigo accent, soft cards.
   ============================================================ */

:root{
  --paper:       #F5F5F3;
  --paper-2:     #EDEEEB;
  --surface:     #FFFFFF;
  --ink:         #1E2328;
  --ink-2:       #58616A;
  --ink-3:       #8B939A;
  --line:        rgba(30,35,40,.13);
  --line-soft:   rgba(30,35,40,.07);
  --accent:      #33507E;
  --accent-deep: #27406A;
  --accent-tint: #E8EDF5;
  --field:       #FFFFFF;
  --shadow:      0 1px 2px rgba(30,35,40,.05), 0 8px 24px -16px rgba(30,35,40,.22);

  --jp:       "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --jp-serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --en:       "Archivo", "Helvetica Neue", Arial, sans-serif;

  --wrap: 1060px;
  --gutter: clamp(20px, 5vw, 48px);
  --radius: 10px;
}

@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:       #16191C;
    --paper-2:     #101315;
    --surface:     #1D2226;
    --ink:         #E9EBEC;
    --ink-2:       #A2AAB1;
    --ink-3:       #767E85;
    --line:        rgba(233,235,236,.15);
    --line-soft:   rgba(233,235,236,.08);
    --accent:      #92B0DC;
    --accent-deep: #A9C2E6;
    --accent-tint: #202A38;
    --field:       #171B1F;
    --shadow:      0 1px 2px rgba(0,0,0,.3), 0 8px 24px -16px rgba(0,0,0,.6);
  }
}
:root[data-theme="dark"]{
  --paper:       #16191C;
  --paper-2:     #101315;
  --surface:     #1D2226;
  --ink:         #E9EBEC;
  --ink-2:       #A2AAB1;
  --ink-3:       #767E85;
  --line:        rgba(233,235,236,.15);
  --line-soft:   rgba(233,235,236,.08);
  --accent:      #92B0DC;
  --accent-deep: #A9C2E6;
  --accent-tint: #202A38;
  --field:       #171B1F;
  --shadow:      0 1px 2px rgba(0,0,0,.3), 0 8px 24px -16px rgba(0,0,0,.6);
}

*,*::before,*::after{ box-sizing:border-box; }

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--jp);
  font-weight:400;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  padding-bottom:0;
}
@media (max-width:719px){ body{ padding-bottom:64px; } }

h1,h2,h3,h4,p,ul,ol,dl,dd{ margin:0; }
ul,ol{ padding:0; list-style:none; }
a{ color:inherit; }
img{ display:block; max-width:100%; }
:focus-visible{ outline:2px solid var(--accent); outline-offset:3px; }

.wrap{ max-width:var(--wrap); margin-inline:auto; }

/* ---------------- shared ---------------- */

.sec{ padding: clamp(56px,8vw,96px) var(--gutter); }
.sec-alt{ background:var(--paper-2); }

.sec-head{ text-align:center; margin-bottom:clamp(32px,4.5vw,52px); }
.eyebrow{
  font-family:var(--en); font-weight:600; font-size:.7rem;
  letter-spacing:.2em; text-transform:uppercase; color:var(--accent);
  display:block; margin-bottom:10px;
}
h2{
  font-weight:700; font-size:clamp(1.4rem,3.2vw,1.95rem);
  line-height:1.6; letter-spacing:.02em; text-wrap:balance;
}
.sec-lead{
  margin:14px auto 0; max-width:36em;
  color:var(--ink-2); font-size:.95rem; line-height:2;
}

/* ---------------- buttons ---------------- */

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  padding:16px 30px; border-radius:var(--radius);
  font-family:var(--jp); font-size:.98rem; font-weight:700; letter-spacing:.04em;
  text-decoration:none; cursor:pointer; border:1.5px solid transparent;
  transition:background .25s, border-color .25s, color .25s, transform .2s, box-shadow .25s;
  white-space:nowrap;
}
.btn-primary{
  background:var(--accent); color:#fff; box-shadow:var(--shadow);
}
:root[data-theme="dark"] .btn-primary,
:root:not([data-theme="light"]) .btn-primary{ color:#12171C; }
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]) .btn-primary{ color:#fff; }
}
.btn-primary:hover{ background:var(--accent-deep); transform:translateY(-1px); }
.btn-outline{
  background:var(--surface); color:var(--ink); border-color:var(--line);
}
.btn-outline:hover{ border-color:var(--accent); color:var(--accent); }
.btn-lg{ padding:18px 36px; font-size:1.02rem; }

/* ---------------- header ---------------- */

.nav{
  position:sticky; top:0; z-index:60;
  background:color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter:blur(12px); -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent; transition:border-color .3s;
}
.nav.stuck{ border-bottom-color:var(--line); }
.nav-in{
  max-width:var(--wrap); margin-inline:auto; padding:14px var(--gutter);
  display:flex; align-items:center; justify-content:space-between; gap:20px;
}
.mark{ text-decoration:none; display:flex; align-items:baseline; gap:9px; }
.mark-en{ font-family:var(--en); font-weight:600; font-size:1.08rem; letter-spacing:.28em; padding-left:.28em; }
.mark-jp{ font-size:.7rem; letter-spacing:.18em; color:var(--ink-2); white-space:nowrap; }
.nav-links{ display:none; gap:24px; }
@media (min-width:960px){ .nav-links{ display:flex; } }
.nav-links a{
  text-decoration:none; font-size:.86rem; color:var(--ink-2); white-space:nowrap;
  padding-bottom:2px; border-bottom:2px solid transparent; transition:color .25s, border-color .25s;
}
.nav-links a:hover{ color:var(--ink); border-bottom-color:var(--accent); }
.nav-cta{ display:flex; align-items:center; gap:14px; }
.nav-tel{
  display:none; font-family:var(--en); font-weight:600; font-size:.92rem;
  text-decoration:none; color:var(--ink); white-space:nowrap;
}
@media (min-width:640px){ .nav-tel{ display:inline; } }
.nav-cta .btn{ padding:10px 18px; font-size:.85rem; }
@media (max-width:519px){ .nav-cta .btn{ display:none; } }

/* ---------------- hero ---------------- */

.hero{
  padding: clamp(48px,8vw,88px) var(--gutter) clamp(52px,7vw,80px);
  background:
    radial-gradient(90% 70% at 85% 0%, var(--accent-tint) 0%, transparent 62%),
    var(--paper);
}
.hero-in{ max-width:var(--wrap); margin-inline:auto; }
.hero h1{
  font-weight:700;
  font-size:clamp(2.1rem, 6.4vw, 3.5rem);
  line-height:1.42; letter-spacing:.01em; text-wrap:balance;
}
.hero h1 .accent{ color:var(--accent); }
.hero-lede{
  margin-top:clamp(20px,3vw,28px); max-width:30em;
  color:var(--ink-2); font-size:clamp(.97rem,1.6vw,1.06rem); line-height:2.05;
}
.hero-cta{ margin-top:clamp(28px,4vw,38px); display:flex; flex-wrap:wrap; gap:12px; }
.hero-note{ margin-top:18px; font-size:.85rem; color:var(--ink-3); }
.hero-badges{
  margin-top:clamp(34px,5vw,52px);
  display:flex; flex-wrap:wrap; gap:10px;
}
.badge{
  background:var(--surface); border:1px solid var(--line);
  border-radius:999px; padding:8px 18px;
  font-size:.84rem; color:var(--ink-2);
}
.badge b{ color:var(--ink); font-weight:700; }

/* ---------------- LINE steps ---------------- */

.steps3{ display:grid; gap:16px; }
@media (min-width:760px){ .steps3{ grid-template-columns:repeat(3,1fr); gap:20px; } }
.step3{
  background:var(--surface); border:1px solid var(--line);
  border-radius:var(--radius); padding:clamp(22px,3vw,30px);
  display:flex; flex-direction:column; gap:12px;
  box-shadow:var(--shadow);
}
.step3 .num{
  width:34px; height:34px; border-radius:999px;
  background:var(--accent-tint); color:var(--accent);
  font-family:var(--en); font-weight:600; font-size:.85rem;
  display:flex; align-items:center; justify-content:center;
}
.step3 h3{ font-weight:700; font-size:1.06rem; line-height:1.6; }
.step3 p{ font-size:.89rem; line-height:1.95; color:var(--ink-2); }

.center-cta{ margin-top:clamp(30px,4vw,42px); display:flex; justify-content:center; }

/* ---------------- reasons ---------------- */

.reasons{ display:grid; gap:16px; }
@media (min-width:700px){ .reasons{ grid-template-columns:repeat(2,1fr); gap:18px; } }
.reason{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius);
  padding:clamp(22px,3vw,30px); display:flex; flex-direction:column; gap:11px;
}
.reason h3{
  font-weight:700; font-size:1.06rem; line-height:1.65;
  display:flex; align-items:baseline; gap:10px;
}
.reason h3::before{
  content:""; flex:0 0 8px; height:8px; border-radius:2px;
  background:var(--accent); transform:translateY(-1px);
}
.reason p{ font-size:.9rem; line-height:1.95; color:var(--ink-2); }

/* ---------------- areas ---------------- */

.areas{
  display:grid; grid-template-columns:repeat(auto-fill,minmax(94px,1fr)); gap:8px;
}
.areas li{
  background:var(--surface); border:1px solid var(--line); border-radius:8px;
  padding:12px 6px; text-align:center; font-size:.9rem; letter-spacing:.03em;
}
.area-note{ margin-top:20px; text-align:center; font-size:.86rem; color:var(--ink-2); }

/* ---------------- flow ---------------- */

.flow{ display:grid; gap:0; max-width:820px; margin-inline:auto; }
.flow-item{
  display:grid; gap:6px 22px; padding:22px 0;
  border-bottom:1px solid var(--line-soft); align-items:start;
}
.flow-item:first-child{ border-top:1px solid var(--line-soft); }
@media (min-width:660px){
  .flow-item{ grid-template-columns:52px 168px minmax(0,1fr); align-items:baseline; }
}
.flow-item .n{
  font-family:var(--en); font-weight:600; font-size:.78rem;
  letter-spacing:.1em; color:var(--accent);
}
.flow-item h4{ font-weight:700; font-size:1rem; letter-spacing:.02em; }
.flow-item p{ font-size:.89rem; line-height:1.95; color:var(--ink-2); }

/* ---------------- cost ---------------- */

.cost-card{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius);
  padding:clamp(24px,3.4vw,38px); max-width:820px; margin-inline:auto;
}
.cost-list{ display:grid; gap:0; margin-top:22px; }
@media (min-width:620px){ .cost-list{ grid-template-columns:1fr 1fr; column-gap:34px; } }
.cost-list li{
  display:grid; grid-template-columns:auto 1fr; gap:10px; align-items:baseline;
  padding:11px 0; border-bottom:1px solid var(--line-soft); font-size:.9rem;
}
.cost-list li::before{ content:"—"; color:var(--accent); }
.cost-note{ margin-top:20px; font-size:.83rem; line-height:1.9; color:var(--ink-3); }

/* ---------------- faq ---------------- */

.faq{ max-width:820px; margin-inline:auto; display:grid; gap:10px; }
details{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius);
  overflow:hidden;
}
summary{
  list-style:none; cursor:pointer; position:relative;
  padding:18px 52px 18px 22px;
  font-weight:700; font-size:.97rem; line-height:1.7;
}
summary::-webkit-details-marker{ display:none; }
summary::after{
  content:""; position:absolute; right:22px; top:26px;
  width:9px; height:9px; border-right:2px solid var(--accent); border-bottom:2px solid var(--accent);
  transform:rotate(45deg); transition:transform .3s;
}
details[open] summary::after{ transform:rotate(-135deg); top:30px; }
details p{
  padding:0 22px 20px; font-size:.9rem; line-height:2; color:var(--ink-2);
}

/* ---------------- contact ---------------- */

.contact-grid{ display:grid; gap:clamp(28px,4vw,44px); }
@media (min-width:920px){ .contact-grid{ grid-template-columns:minmax(0,1.2fr) minmax(0,1fr); } }

.form{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius);
  padding:clamp(22px,3.2vw,34px); display:grid; gap:18px;
}
.field{ display:flex; flex-direction:column; gap:7px; }
.field label{ font-size:.85rem; font-weight:500; color:var(--ink-2); }
.field label .req{
  display:inline-block; margin-left:8px; padding:2px 8px; border-radius:4px;
  background:var(--accent-tint); color:var(--accent); font-size:.7rem; font-weight:700;
}
.row2{ display:grid; gap:18px; }
@media (min-width:600px){ .row2{ grid-template-columns:1fr 1fr; } }

input,select,textarea{
  width:100%; font-family:var(--jp); font-size:.95rem; font-weight:400;
  color:var(--ink); background:var(--field);
  border:1px solid var(--line); border-radius:8px;
  padding:12px 14px; transition:border-color .25s, box-shadow .25s;
  appearance:none;
}
select{
  background-image:linear-gradient(45deg,transparent 50%,var(--ink-3) 50%),linear-gradient(135deg,var(--ink-3) 50%,transparent 50%);
  background-position:calc(100% - 18px) 21px, calc(100% - 12px) 21px;
  background-size:6px 6px,6px 6px; background-repeat:no-repeat; padding-right:38px;
}
select option{ background:var(--surface); color:var(--ink); }
textarea{ min-height:104px; resize:vertical; line-height:1.85; }
input:focus,select:focus,textarea:focus{
  outline:none; border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-tint);
}
input::placeholder,textarea::placeholder{ color:var(--ink-3); }

.form-actions{ display:flex; flex-wrap:wrap; gap:12px; align-items:center; }
.form-msg{ font-size:.85rem; color:var(--accent); font-weight:500; min-height:1.5em; }
.form-fine{ font-size:.8rem; line-height:1.85; color:var(--ink-3); }

.direct{ display:flex; flex-direction:column; gap:12px; }
.direct-item{
  display:flex; align-items:center; gap:16px;
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius);
  padding:18px 22px; text-decoration:none;
  transition:border-color .25s, transform .2s;
}
.direct-item:hover{ border-color:var(--accent); transform:translateY(-1px); }
.direct-item .k{ font-family:var(--en); font-weight:600; font-size:.68rem; letter-spacing:.16em; color:var(--ink-3); min-width:42px; }
.direct-item .v{ font-family:var(--en); font-weight:600; font-size:1.02rem; word-break:break-all; }
.direct-item .v.jp{ font-family:var(--jp); font-size:.95rem; font-weight:700; }
.direct-item .ar{ margin-left:auto; color:var(--accent); }
.hours{
  background:var(--accent-tint); border-radius:var(--radius); padding:18px 22px;
  font-size:.87rem; line-height:1.95; color:var(--ink-2);
}
.hours b{ color:var(--ink); }

/* ---------------- mobile sticky bar ---------------- */

.bar{
  position:fixed; left:0; right:0; bottom:0; z-index:70;
  display:none; gap:8px; padding:8px 12px calc(8px + env(safe-area-inset-bottom));
  background:color-mix(in srgb, var(--paper) 94%, transparent);
  backdrop-filter:blur(12px); -webkit-backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
}
@media (max-width:719px){ .bar{ display:flex; } }
.bar .btn{ flex:1; padding:13px 10px; font-size:.9rem; }

/* ---------------- footer ---------------- */

.foot{
  background:var(--paper-2); border-top:1px solid var(--line);
  padding:clamp(48px,6vw,72px) var(--gutter) 32px;
}
.foot-in{ max-width:var(--wrap); margin-inline:auto; display:grid; gap:34px; }
@media (min-width:820px){ .foot-in{ grid-template-columns:minmax(0,1.4fr) repeat(2,minmax(0,1fr)); gap:52px; } }
.foot-co{ display:flex; flex-direction:column; gap:14px; }
.foot-co address{ font-style:normal; font-size:.86rem; line-height:2; color:var(--ink-2); }
.foot-lic{ font-size:.8rem; color:var(--ink-3); }
.foot-col h5{ font-family:var(--en); font-weight:600; font-size:.68rem; letter-spacing:.18em; color:var(--ink-3); margin-bottom:14px; }
.foot-col ul{ display:flex; flex-direction:column; gap:10px; }
.foot-col a{ font-size:.87rem; text-decoration:none; color:var(--ink-2); transition:color .25s; }
.foot-col a:hover{ color:var(--accent); }
.foot-base{
  max-width:var(--wrap); margin:clamp(36px,4.5vw,54px) auto 0;
  padding-top:20px; border-top:1px solid var(--line-soft);
  display:flex; flex-wrap:wrap; justify-content:space-between; gap:12px;
  font-size:.76rem; color:var(--ink-3);
}
.draft{
  max-width:var(--wrap); margin:18px auto 0;
  font-size:.76rem; line-height:1.9; color:var(--ink-3);
  border-left:2px solid var(--line); padding-left:14px;
}

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

.rise{ opacity:0; transform:translateY(12px); transition:opacity .7s cubic-bezier(.22,.7,.3,1), transform .7s cubic-bezier(.22,.7,.3,1); }
.rise.in{ opacity:1; transform:none; }
@media (prefers-reduced-motion:reduce){
  *{ animation:none !important; transition:none !important; }
  .rise{ opacity:1; transform:none; }
}

/* ---------------- long-form document page ---------------- */

.doc{ max-width:46em; }
.doc h3{ font-weight:700; font-size:1.02rem; letter-spacing:.02em; margin:0 0 10px; }
.doc section{ padding:26px 0; border-bottom:1px solid var(--line-soft); display:grid; gap:6px 26px; }
.doc section:first-of-type{ border-top:1px solid var(--line); }
@media (min-width:720px){ .doc section{ grid-template-columns:44px minmax(0,1fr); } }
.doc .n{ font-family:var(--en); font-weight:600; font-size:.7rem; letter-spacing:.14em; color:var(--accent); }
.doc p{ font-size:.9rem; line-height:2; color:var(--ink-2); }
.doc ul{ display:flex; flex-direction:column; gap:7px; margin-top:8px; }
.doc li{ font-size:.9rem; line-height:1.95; color:var(--ink-2); padding-left:1.1em; text-indent:-1.1em; }
.doc li::before{ content:"—　"; color:var(--ink-3); }
.doc .meta{ margin-top:34px; font-size:.82rem; color:var(--ink-3); line-height:1.95; }
.back{ margin-top:44px; }