/* ===================================================================
   Ishigaki Pay — Landing Page
   Ocean-teal palette · Refactoring UI principles
   =================================================================== */

:root{
  --teal-600:#0B7E9E; --teal-500:#0C8FA8; --teal-400:#16BEC4;
  --grad:linear-gradient(135deg,#16BEC4 0%,#0C8FA8 58%,#0B7E9E 100%);
  --grad-coral:linear-gradient(135deg,#FF8A65,#FF6B5E);
  --coral:#FF6B5E;
  --ink:#1F2937; --muted:#5B6671; --faint:#8A949C;
  --bg:#F1F4F5; --card:#FFFFFF; --line:#E7ECEE;
  --pos:#0EA371; --neg:#374151;
  --shadow-sm:0 1px 2px rgba(16,40,52,.06), 0 4px 12px -6px rgba(16,40,52,.12);
  --shadow-md:0 10px 24px -12px rgba(16,40,52,.28);
  --shadow-lg:0 30px 60px -24px rgba(11,126,158,.45);
  --radius:18px;
  --maxw:1120px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Noto Sans JP",-apple-system,BlinkMacSystemFont,"Hiragino Sans","Hiragino Kaku Gothic ProN",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;}
h1,h2,h3{line-height:1.3; letter-spacing:.01em;}
img,svg{display:block;}

.container{ width:100%; max-width:var(--maxw); margin:0 auto; padding:0 24px; }

/* ===== buttons ===== */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-weight:700; font-size:15.5px; text-decoration:none; cursor:pointer;
  border:0; border-radius:14px; padding:14px 26px; transition:transform .12s ease, box-shadow .2s ease, opacity .2s ease;
}
.btn-primary{
  color:#fff; background:var(--grad);
  box-shadow:0 14px 26px -12px rgba(11,126,158,.7);
}
.btn-primary:hover{ transform:translateY(-1px); box-shadow:0 18px 32px -12px rgba(11,126,158,.78); }
.btn-primary:active{ transform:translateY(0); }
.btn-ghost{
  color:var(--teal-600); background:#fff; box-shadow:var(--shadow-sm);
}
.btn-ghost:hover{ transform:translateY(-1px); box-shadow:var(--shadow-md); }
.btn-block{ width:100%; }

/* ===== header ===== */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(241,244,245,.82); backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid rgba(231,236,238,.8);
}
.nav{ display:flex; align-items:center; justify-content:space-between; height:66px; }
.brand{ display:flex; align-items:center; gap:9px; text-decoration:none; }
.brand-mark{ font-size:20px; }
.brand-name{ font-weight:800; font-size:18px; letter-spacing:.01em; color:var(--ink); }
.nav-links{ display:flex; align-items:center; gap:28px; }
.nav-links a{ text-decoration:none; color:var(--muted); font-size:14.5px; font-weight:500; transition:color .15s ease; }
.nav-links a:hover{ color:var(--ink); }
.nav-cta{
  color:#fff !important; background:var(--grad); padding:9px 18px; border-radius:12px;
  font-weight:700 !important; box-shadow:0 10px 20px -12px rgba(11,126,158,.7);
}
.nav-cta:hover{ color:#fff !important; }

/* ===== hero ===== */
.hero{ position:relative; overflow:hidden; padding:64px 0 72px; }
.hero-bg{
  position:absolute; inset:0; z-index:0;
  background:
    radial-gradient(900px 480px at 78% -8%, #d6f0f2 0%, rgba(241,244,245,0) 60%),
    radial-gradient(700px 420px at 0% 100%, #e4f4f0 0%, rgba(241,244,245,0) 55%);
}
.hero-grid{
  position:relative; z-index:1;
  display:grid; grid-template-columns:1.05fr .95fr; gap:48px; align-items:center;
}
.eyebrow{
  display:inline-block; font-size:13px; font-weight:700; letter-spacing:.04em;
  color:var(--teal-600); background:#E2F4F4; padding:7px 14px; border-radius:999px; margin-bottom:20px;
}
.hero-title{ font-size:clamp(34px, 5vw, 54px); font-weight:800; margin:0 0 20px; letter-spacing:-.01em; }
.grad-text{
  background:var(--grad); -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero-sub{ font-size:17px; color:var(--muted); margin:0 0 30px; max-width:540px; }
.hero-sub strong{ color:var(--ink); font-weight:700; }
.hero-actions{ display:flex; gap:14px; flex-wrap:wrap; margin-bottom:26px; }
.hero-badges{ list-style:none; margin:0; padding:0; display:flex; flex-wrap:wrap; gap:18px; }
.hero-badges li{ display:flex; align-items:center; gap:8px; font-size:13.5px; color:var(--muted); font-weight:500; }
.hero-badges .dot{ width:8px; height:8px; border-radius:50%; background:var(--grad); flex:0 0 8px; }

/* ===== hero phone visual ===== */
.hero-visual{ position:relative; display:flex; justify-content:center; }
.hero-blob{ position:absolute; border-radius:50%; filter:blur(8px); z-index:0; }
.blob-1{ width:240px; height:240px; background:rgba(22,190,196,.18); top:-30px; right:10px; }
.blob-2{ width:180px; height:180px; background:rgba(255,107,94,.16); bottom:-10px; left:0; }

.phone{
  position:relative; z-index:2;
  width:286px; background:#0c0c0c; border-radius:42px; padding:9px;
  box-shadow:0 40px 80px -28px rgba(16,40,52,.5), 0 0 0 2px rgba(0,0,0,.85), inset 0 0 0 2px #2a2a2a;
}
.phone-island{
  position:absolute; top:9px; left:50%; transform:translateX(-50%);
  width:92px; height:26px; background:#000; border-radius:16px; z-index:5;
}
.phone-screen{
  background:var(--bg); border-radius:34px; padding:34px 16px 20px; overflow:hidden;
}
.app-greet{ display:flex; align-items:center; justify-content:space-between; padding:2px 4px 12px; }
.app-hi{ font-size:12px; color:var(--muted); }
.app-hi b{ display:block; font-size:15px; color:var(--ink); margin-top:1px; }
.app-avatar{
  width:34px; height:34px; border-radius:50%; background:var(--grad-coral); color:#fff;
  display:flex; align-items:center; justify-content:center; font-size:16px;
  box-shadow:0 6px 14px -4px rgba(255,107,94,.6);
}
.app-balance{
  border-radius:22px; padding:18px 18px 16px; color:#fff; position:relative; overflow:hidden;
  background:var(--grad); box-shadow:0 18px 30px -16px rgba(11,126,158,.65);
}
.app-balance::after{ content:""; position:absolute; right:-34px; top:-44px; width:140px; height:140px; border-radius:50%; background:rgba(255,255,255,.12); }
.app-brandmark{ font-size:11px; font-weight:800; letter-spacing:.05em; opacity:.95; }
.app-balance-label{ font-size:11.5px; opacity:.9; margin-top:10px; letter-spacing:.03em; }
.app-amt{ font-size:36px; font-weight:800; line-height:1.05; margin:4px 0 2px; letter-spacing:-.01em; position:relative; z-index:1; }
.app-amt small{ font-size:15px; font-weight:700; margin-left:5px; opacity:.95; }
.app-chip{
  display:inline-flex; align-items:center; gap:5px; margin-top:9px; position:relative; z-index:1;
  background:rgba(255,255,255,.2); padding:5px 11px; border-radius:999px; font-size:11px; font-weight:700;
}
.app-pay{
  width:100%; margin:14px 0 4px; border:0; cursor:default; border-radius:16px; padding:14px;
  background:var(--ink); color:#fff; font-size:14px; font-weight:700;
  display:flex; align-items:center; justify-content:center; gap:9px;
  box-shadow:0 14px 22px -14px rgba(31,41,55,.7);
}
.app-sec{ font-size:13px; font-weight:700; padding:14px 4px 8px; }
.app-list{ background:#fff; border-radius:16px; overflow:hidden; box-shadow:var(--shadow-sm); }
.app-tx{ display:flex; align-items:center; gap:10px; padding:11px 12px; border-bottom:1px solid var(--line); }
.app-tx:last-child{ border-bottom:0; }
.app-ic{ width:32px; height:32px; border-radius:10px; display:flex; align-items:center; justify-content:center; font-size:15px; flex:0 0 32px; }
.app-ic.bonus{ background:#FFF4DA; }
.app-ic.spend{ background:#EEF1F3; }
.app-meta{ flex:1; min-width:0; display:flex; flex-direction:column; }
.app-meta b{ font-size:12.5px; font-weight:600; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.app-meta i{ font-size:10.5px; color:var(--faint); font-style:normal; }
.app-val{ font-size:13px; font-weight:700; white-space:nowrap; }
.app-val.pos{ color:var(--pos); }
.app-val.neg{ color:var(--neg); }

/* ===== sections ===== */
.section{ padding:80px 0; }
.section-tint{ background:linear-gradient(180deg,#fff 0%, #FAFCFC 100%); }
.section-head{ max-width:680px; margin:0 auto 48px; text-align:center; }
.kicker{
  display:inline-block; font-size:13px; font-weight:700; letter-spacing:.08em; text-transform:uppercase;
  color:var(--teal-600); margin-bottom:14px;
}
.kicker.light{ color:#BFEDEF; }
.section-head h2{ font-size:clamp(26px, 3.4vw, 34px); font-weight:800; margin:0 0 16px; }
.section-lead{ font-size:16px; color:var(--muted); margin:0; }

/* ===== usecase ===== */
.usecase-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.usecase-card{
  background:var(--card); border-radius:var(--radius); padding:32px 28px;
  box-shadow:var(--shadow-md); transition:transform .15s ease, box-shadow .2s ease;
}
.usecase-card:hover{ transform:translateY(-3px); box-shadow:var(--shadow-lg); }
.usecase-emoji{
  width:54px; height:54px; border-radius:16px; background:#E9F6F6;
  display:flex; align-items:center; justify-content:center; font-size:26px; margin-bottom:18px;
}
.usecase-card h3{ font-size:18px; font-weight:700; margin:0 0 10px; }
.usecase-card p{ font-size:14.5px; color:var(--muted); margin:0; }

/* ===== features ===== */
.feature-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:22px; }
.feature-card{
  background:var(--card); border-radius:var(--radius); padding:28px 24px;
  box-shadow:var(--shadow-md); transition:transform .15s ease, box-shadow .2s ease;
}
.feature-card:hover{ transform:translateY(-3px); box-shadow:var(--shadow-lg); }
.feature-icon{
  width:50px; height:50px; border-radius:14px; display:flex; align-items:center; justify-content:center; margin-bottom:18px;
}
.feature-icon svg{ width:26px; height:26px; }
.feature-icon.teal{ background:#E2F4F4; color:var(--teal-600); }
.feature-icon.coral{ background:#FFEDE9; color:var(--coral); }
.feature-card h3{ font-size:16.5px; font-weight:700; margin:0 0 10px; }
.feature-card p{ font-size:14px; color:var(--muted); margin:0; }

/* ===== how ===== */
.how-grid{
  list-style:none; margin:0; padding:0;
  display:grid; grid-template-columns:repeat(3,1fr); gap:24px;
}
.how-step{
  position:relative; background:var(--card); border-radius:var(--radius); padding:40px 28px 30px; text-align:center;
  box-shadow:var(--shadow-md);
}
.how-num{
  position:absolute; top:-18px; left:50%; transform:translateX(-50%);
  width:40px; height:40px; border-radius:50%; background:var(--grad); color:#fff;
  display:flex; align-items:center; justify-content:center; font-weight:800; font-size:17px;
  box-shadow:0 10px 18px -8px rgba(11,126,158,.7);
}
.how-illust{
  width:80px; height:80px; margin:6px auto 18px; border-radius:24px; background:#F4FAFA;
  display:flex; align-items:center; justify-content:center; font-size:38px;
}
.how-step h3{ font-size:18px; font-weight:700; margin:0 0 8px; }
.how-step p{ font-size:14.5px; color:var(--muted); margin:0; }

/* ===== contact ===== */
.section-contact{
  background:var(--grad); color:#fff; position:relative; overflow:hidden;
}
.section-contact::after{
  content:""; position:absolute; right:-120px; top:-120px; width:420px; height:420px; border-radius:50%;
  background:rgba(255,255,255,.08);
}
.contact-grid{
  position:relative; z-index:1;
  display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:start;
}
.contact-intro h2{ color:#fff; font-size:clamp(26px,3.2vw,32px); margin:0 0 16px; }
.contact-intro p{ font-size:16px; color:rgba(255,255,255,.92); margin:0 0 24px; max-width:460px; }
.contact-points{ list-style:none; margin:0; padding:0; display:grid; gap:12px; }
.contact-points li{ display:flex; align-items:flex-start; gap:10px; font-size:15px; color:#fff; font-weight:500; }
.contact-points li span{
  flex:0 0 22px; width:22px; height:22px; border-radius:50%; background:rgba(255,255,255,.22);
  display:flex; align-items:center; justify-content:center; font-size:12px; font-weight:700; margin-top:2px;
}

.contact-card{
  background:#fff; color:var(--ink); border-radius:24px; padding:32px;
  box-shadow:0 40px 70px -28px rgba(16,40,52,.5);
}

/* ===== form ===== */
.field{ margin-bottom:18px; }
.field label{ display:block; font-size:14px; font-weight:700; margin-bottom:7px; color:var(--ink); }
.req{ font-size:11px; font-weight:700; color:var(--coral); background:#FFEDE9; padding:2px 8px; border-radius:6px; margin-left:6px; vertical-align:1px; }
.opt{ font-size:11px; font-weight:600; color:var(--faint); background:#F1F4F5; padding:2px 8px; border-radius:6px; margin-left:6px; vertical-align:1px; }
.field input, .field textarea{
  width:100%; font-family:inherit; font-size:15px; color:var(--ink);
  background:#F7FAFA; border:1.5px solid transparent; border-radius:12px; padding:13px 14px;
  transition:border-color .15s ease, background .15s ease, box-shadow .15s ease;
}
.field textarea{ resize:vertical; min-height:120px; line-height:1.7; }
.field input::placeholder, .field textarea::placeholder{ color:var(--faint); }
.field input:focus, .field textarea:focus{
  outline:none; background:#fff; border-color:var(--teal-400);
  box-shadow:0 0 0 4px rgba(22,190,196,.14);
}
.field.invalid input, .field.invalid textarea{
  background:#FFF6F5; border-color:var(--coral);
  box-shadow:0 0 0 4px rgba(255,107,94,.12);
}
.error{
  display:flex; align-items:center; gap:6px; margin:8px 0 0; font-size:13px; font-weight:600; color:#D84A3F;
}
.error::before{
  content:""; flex:0 0 16px; width:16px; height:16px;
  background:#D84A3F; -webkit-mask:center/contain no-repeat var(--err-icon); mask:center/contain no-repeat var(--err-icon);
}
:root{
  --err-icon:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2a10 10 0 100 20 10 10 0 000-20zm0 5a1.2 1.2 0 011.2 1.2v5a1.2 1.2 0 01-2.4 0v-5A1.2 1.2 0 0112 7zm0 9.2a1.4 1.4 0 110 2.8 1.4 1.4 0 010-2.8z'/%3E%3C/svg%3E");
}

#submit-btn{ position:relative; margin-top:6px; }
#submit-btn .spinner{
  width:18px; height:18px; border-radius:50%;
  border:2.5px solid rgba(255,255,255,.4); border-top-color:#fff;
  display:none; animation:spin .7s linear infinite;
}
#submit-btn.loading{ opacity:.85; cursor:progress; }
#submit-btn.loading .btn-label{ opacity:.85; }
#submit-btn.loading .spinner{ display:inline-block; }
@keyframes spin{ to{ transform:rotate(360deg); } }

.form-status{
  margin:16px 0 0; font-size:14px; font-weight:600; padding:12px 14px; border-radius:12px;
}
.form-status.is-error{ background:#FFF1EF; color:#C53D31; }

.recaptcha-note{ margin:16px 0 0; font-size:11.5px; line-height:1.6; color:var(--faint); }
.recaptcha-note a{ color:var(--teal-600); text-decoration:none; }
.recaptcha-note a:hover{ text-decoration:underline; }

/* success */
.form-success{ text-align:center; padding:24px 8px; }
.success-mark{
  width:72px; height:72px; margin:0 auto 18px; border-radius:50%; background:#E2F4F4;
  display:flex; align-items:center; justify-content:center; font-size:34px;
}
.form-success h3{ font-size:20px; font-weight:800; margin:0 0 10px; }
.form-success p{ font-size:15px; color:var(--muted); margin:0; max-width:380px; margin-inline:auto; }

/* ===== footer ===== */
.site-footer{ background:#0E2A33; color:#C7D2D6; padding:48px 0 32px; }
.footer-grid{
  display:flex; align-items:flex-start; justify-content:space-between; gap:32px;
  padding-bottom:28px; margin-bottom:24px; border-bottom:1px solid rgba(255,255,255,.08); flex-wrap:wrap;
}
.footer-brand{ display:flex; flex-direction:column; gap:4px; }
.footer-brand .brand-mark{ font-size:22px; }
.footer-brand .brand-name{ color:#fff; font-size:18px; font-weight:800; }
.footer-tag{ font-size:13px; color:#8FA3A9; margin:6px 0 0; }
.footer-links{ display:flex; gap:24px; flex-wrap:wrap; }
.footer-links a{ font-size:14px; color:#C7D2D6; text-decoration:none; transition:color .15s ease; }
.footer-links a:hover{ color:#fff; }
.disclaimer{
  font-size:12.5px; line-height:1.8; color:#94A6AC; margin:0 0 16px;
  background:rgba(255,255,255,.04); border-radius:12px; padding:16px 18px;
}
.copyright{ font-size:12.5px; color:#7C9097; margin:0; }

/* ===================================================================
   Responsive
   =================================================================== */
@media (max-width:980px){
  .feature-grid{ grid-template-columns:repeat(2,1fr); }
}
@media (max-width:880px){
  .nav-links a:not(.nav-cta){ display:none; }
  .hero{ padding:44px 0 56px; }
  .hero-grid{ grid-template-columns:1fr; gap:44px; }
  .hero-copy{ text-align:center; }
  .hero-sub{ margin-inline:auto; }
  .hero-actions{ justify-content:center; }
  .hero-badges{ justify-content:center; }
  .usecase-grid{ grid-template-columns:1fr; }
  .how-grid{ grid-template-columns:1fr; gap:40px; }
  .contact-grid{ grid-template-columns:1fr; gap:36px; }
}
@media (max-width:560px){
  .section{ padding:56px 0; }
  .container{ padding:0 18px; }
  .feature-grid{ grid-template-columns:1fr; }
  .contact-card{ padding:24px 20px; }
  .btn{ width:100%; }
  .hero-actions{ flex-direction:column; }
  .footer-grid{ flex-direction:column; gap:20px; }
}

@media (prefers-reduced-motion:reduce){
  *{ scroll-behavior:auto !important; animation:none !important; transition:none !important; }
}