/* ==========================================================
   共有問い合わせフォームLP / Shared Contact Form
   © LINK-UP Management / lu-m.co.jp/contact/
   ========================================================== */

:root{
  --white:#FFFFFF;
  --paper:#FAFAF7;
  --paper-soft:#F5F2EB;
  --paper-elev:#EFEBE0;
  --gold:#B8985A;
  --gold-peak:#A8864A;
  --gold-deep:#7A6540;
  --ink:#1A1815;
  --ink-soft:#2C2925;
  --ink-mute:#6B6660;
  --ink-faint:#A8A39A;
  --line:rgba(184,152,90,.30);
  --line-soft:rgba(184,152,90,.14);
  --line-paper:rgba(26,24,21,.08);
  --error:#C0392B;
  --success:#27AE60;
  --easing:cubic-bezier(.2,.7,.2,1);
}

*,*::before,*::after{box-sizing:border-box; margin:0; padding:0;}
html,body{background:var(--paper); color:var(--ink); scroll-behavior:smooth;}
body{
  font-family:"Noto Sans JP", system-ui, sans-serif;
  font-weight:300;
  line-height:1.8;
  font-feature-settings:"palt" 1;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
img,svg{display:block; max-width:100%;}
a{color:inherit; text-decoration:none;}
button{font:inherit; color:inherit; background:none; border:none; cursor:pointer;}

/* Background decoration */
body::before{
  content:""; position:fixed; inset:0; pointer-events:none; z-index:0;
  background:
    radial-gradient(ellipse at 15% 10%, rgba(184,152,90,.10), transparent 50%),
    radial-gradient(ellipse at 85% 90%, rgba(184,152,90,.07), transparent 55%);
}

/* ==========================================================
   NAV (minimal, back to home)
   ========================================================== */
.nav{
  position:relative; z-index:10;
  padding:24px 32px;
  background:rgba(255,255,255,.7);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-soft);
}
.nav__inner{
  max-width:1180px; margin:0 auto;
  display:flex; align-items:center; justify-content:space-between;
}
.nav__logo{
  font-family:"Cormorant Garamond",serif;
  font-style:italic;
  font-weight:500;
  font-size:18px;
  letter-spacing:.04em;
  color:var(--ink);
  display:flex; align-items:center; gap:14px;
}
.nav__back{
  font-family:"JetBrains Mono",monospace;
  font-size:10px;
  letter-spacing:.18em;
  color:var(--ink-mute);
  text-transform:uppercase;
  display:inline-flex; align-items:center; gap:8px;
  padding:8px 16px;
  border:1px solid var(--line);
  transition:border-color .3s, color .3s;
}
.nav__back:hover{ border-color:var(--gold); color:var(--gold-peak); }

/* ==========================================================
   MAIN
   ========================================================== */
.wrap{
  position:relative; z-index:2;
  max-width:1180px;
  margin:0 auto;
  padding:80px 32px 100px;
  display:grid;
  grid-template-columns:1fr 1.4fr;
  gap:80px;
  align-items:start;
}

/* === LEFT: Context info === */
.intro{ position:sticky; top:120px; }
.intro__tag{
  font-family:"JetBrains Mono",monospace;
  font-size:11px;
  letter-spacing:.32em;
  text-transform:uppercase;
  color:var(--gold-peak);
  margin-bottom:24px;
  display:inline-flex; align-items:center; gap:12px;
}
.intro__tag::before{ content:""; width:32px; height:1px; background:var(--gold); }
.intro__title{
  font-family:"Noto Serif JP",serif;
  font-weight:500;
  font-size:clamp(32px, 4vw, 44px);
  line-height:1.5;
  color:var(--ink);
  margin-bottom:24px;
}
.intro__title em{
  font-family:"Cormorant Garamond",serif;
  font-style:italic;
  color:var(--gold-peak);
}
.intro__lead{
  font-size:14px;
  color:var(--ink-mute);
  line-height:2;
  margin-bottom:36px;
}

.intro__list{
  list-style:none;
  padding:24px 28px;
  background:var(--white);
  border:1px solid var(--line);
  border-left:3px solid var(--gold);
}
.intro__list li{
  font-size:13px;
  color:var(--ink-soft);
  line-height:1.8;
  padding:8px 0 8px 22px;
  position:relative;
}
.intro__list li::before{
  content:"";
  position:absolute;
  left:0; top:18px;
  width:12px; height:1px;
  background:var(--gold-peak);
}

.intro__contact{
  margin-top:32px;
  padding:24px 0;
  border-top:1px solid var(--line-soft);
  font-size:12px;
  color:var(--ink-mute);
  line-height:1.9;
}
.intro__contact strong{
  display:block;
  font-family:"Cormorant Garamond",serif;
  font-style:italic;
  font-size:18px;
  color:var(--gold-peak);
  margin-bottom:6px;
}

/* === RIGHT: Form === */
.form-panel{
  background:var(--white);
  border:1px solid var(--line);
  padding:48px;
  position:relative;
}
.form-panel__step{
  font-family:"JetBrains Mono",monospace;
  font-size:10px;
  letter-spacing:.24em;
  color:var(--ink-mute);
  text-transform:uppercase;
  margin-bottom:8px;
}
.form-panel__title{
  font-family:"Noto Serif JP",serif;
  font-weight:500;
  font-size:24px;
  color:var(--ink);
  margin-bottom:32px;
}

.field{ margin-bottom:24px; }
.field__label{
  display:block;
  font-size:13px;
  font-weight:500;
  color:var(--ink);
  margin-bottom:8px;
}
.field__label .req{
  color:var(--gold-peak);
  font-family:"JetBrains Mono",monospace;
  font-size:10px;
  margin-left:6px;
  letter-spacing:.1em;
}
.field__label .opt{
  color:var(--ink-faint);
  font-family:"JetBrains Mono",monospace;
  font-size:10px;
  margin-left:6px;
  letter-spacing:.1em;
}
.field__input,
.field__textarea,
.field__select{
  width:100%;
  padding:13px 16px;
  font-family:"Noto Sans JP",sans-serif;
  font-size:14px;
  color:var(--ink);
  background:var(--paper);
  border:1px solid var(--line-soft);
  border-radius:0;
  transition:border-color .3s, background .3s;
  -webkit-appearance:none;
  appearance:none;
}
.field__input:focus,
.field__textarea:focus,
.field__select:focus{
  outline:none;
  border-color:var(--gold);
  background:var(--white);
  box-shadow:0 0 0 3px rgba(184,152,90,.12);
}
.field__textarea{ min-height:140px; resize:vertical; line-height:1.8; }
.field__select{
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14' fill='none'><path d='M3 5l4 4 4-4' stroke='%236B6660' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-repeat:no-repeat;
  background-position:right 16px center;
  padding-right:42px;
}

/* Radio group */
.radio-group{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:10px;
}
.radio-group input{ display:none; }
.radio-group label{
  display:flex;
  align-items:center;
  padding:14px 16px;
  background:var(--paper);
  border:1px solid var(--line-soft);
  font-size:13px;
  color:var(--ink-soft);
  cursor:pointer;
  transition:all .25s var(--easing);
}
.radio-group label::before{
  content:"";
  width:16px; height:16px;
  border-radius:50%;
  border:1.5px solid var(--ink-faint);
  margin-right:10px;
  flex-shrink:0;
  transition:border-color .25s, background .25s;
}
.radio-group input:checked + label{
  background:var(--white);
  border-color:var(--gold);
  color:var(--ink);
}
.radio-group input:checked + label::before{
  border-color:var(--gold);
  background:radial-gradient(circle, var(--gold) 38%, var(--white) 42%);
}

.field__hint{
  font-size:11px;
  color:var(--ink-mute);
  margin-top:6px;
  line-height:1.6;
}
.field__error{
  font-size:11px;
  color:var(--error);
  margin-top:6px;
  display:none;
}
.field.is-error .field__input,
.field.is-error .field__textarea,
.field.is-error .field__select{
  border-color:var(--error);
  background:#FDF3F2;
}
.field.is-error .field__error{ display:block; }

/* Agreement */
.agreement{
  margin:32px 0;
  padding:20px 22px;
  background:var(--paper-soft);
  border-left:2px solid var(--gold);
  font-size:12px;
  color:var(--ink-soft);
  line-height:1.8;
}
.agreement label{ display:flex; align-items:flex-start; gap:10px; cursor:pointer; }
.agreement input[type=checkbox]{
  width:16px; height:16px;
  flex-shrink:0; margin-top:3px;
  accent-color:var(--gold);
}
.agreement a{ color:var(--gold-peak); text-decoration:underline; }

/* Submit button */
.submit-btn{
  width:100%;
  padding:18px;
  background:var(--gold);
  color:var(--white);
  font-family:"JetBrains Mono",monospace;
  font-size:13px;
  font-weight:500;
  letter-spacing:.24em;
  text-transform:uppercase;
  cursor:pointer;
  transition:all .35s var(--easing);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:14px;
  box-shadow:0 10px 30px rgba(184,152,90,.30);
}
.submit-btn:hover:not(:disabled){
  background:var(--gold-peak);
  transform:translateY(-2px);
  box-shadow:0 14px 36px rgba(184,152,90,.40);
}
.submit-btn:disabled{
  background:var(--ink-faint);
  cursor:not-allowed;
  box-shadow:none;
}
.submit-btn .spinner{
  width:16px; height:16px;
  border:2px solid rgba(255,255,255,.3);
  border-top-color:#fff;
  border-radius:50%;
  animation:spin .8s linear infinite;
  display:none;
}
.submit-btn.is-loading .spinner{ display:inline-block; }
.submit-btn.is-loading .label-default{ display:none; }
.submit-btn .label-loading{ display:none; }
.submit-btn.is-loading .label-loading{ display:inline; }
@keyframes spin{ to{transform:rotate(360deg);} }

/* === Success state === */
.success{
  text-align:center;
  padding:60px 32px;
  display:none;
}
.success.is-active{ display:block; }
.form-panel.is-success .form-area{ display:none; }
.success__icon{
  width:80px; height:80px;
  margin:0 auto 28px;
  background:var(--paper-soft);
  border:1px solid var(--gold);
  border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  color:var(--gold-peak);
}
.success__title{
  font-family:"Noto Serif JP",serif;
  font-weight:500;
  font-size:24px;
  margin-bottom:14px;
}
.success__title em{
  font-family:"Cormorant Garamond",serif;
  font-style:italic;
  color:var(--gold-peak);
}
.success__msg{
  font-size:14px;
  color:var(--ink-mute);
  line-height:2;
  margin-bottom:32px;
}
.success__back{
  display:inline-flex; align-items:center; gap:10px;
  padding:14px 26px;
  border:1px solid var(--line);
  font-family:"JetBrains Mono",monospace;
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--ink);
  transition:border-color .3s, color .3s;
}
.success__back:hover{ border-color:var(--gold); color:var(--gold-peak); }

/* === Error state === */
.alert-error{
  display:none;
  margin-bottom:24px;
  padding:14px 18px;
  background:#FDF3F2;
  border:1px solid #F1B0A8;
  border-left:3px solid var(--error);
  font-size:13px;
  color:#922D1F;
  line-height:1.6;
}
.alert-error.is-active{ display:block; }

/* ==========================================================
   FOOTER
   ========================================================== */
.footer{
  position:relative; z-index:2;
  border-top:1px solid var(--line-soft);
  padding:32px;
  text-align:center;
  font-family:"JetBrains Mono",monospace;
  font-size:10px;
  letter-spacing:.16em;
  color:var(--ink-mute);
  background:var(--paper-soft);
}

/* ==========================================================
   RESPONSIVE
   ========================================================== */
@media (max-width:980px){
  .wrap{
    grid-template-columns:1fr;
    gap:48px;
    padding:48px 24px 80px;
  }
  .intro{ position:static; }
  .form-panel{ padding:32px 24px; }
}
@media (max-width:560px){
  .nav{ padding:18px 20px; }
  .nav__back{ padding:6px 12px; font-size:9px; }
  .radio-group{ grid-template-columns:1fr; }
  .form-panel{ padding:28px 20px; }
}