/* ===========================================================
   SUKIMIX ブランドサイト  style.css
   ブランドカラー: ティール / クリムゾン / ライムイエロー
   =========================================================== */

:root {
  --teal:   #10b4c6;
  --teal-d: #0a94a3;
  --red:    #ce1230;
  --lime:   #c7d400;
  --ink:    #1a1a1a;
  --ink-2:  #4a4f52;
  --paper:  #ffffff;
  --paper-2:#f5f7f8;
  --shadow: #9aa0a0;
  --line:   #e6eaec;

  --maxw: 1080px;
  --radius: 18px;
  --ease: cubic-bezier(.16,.84,.44,1);

  --font: "Helvetica Neue", "Hiragino Kaku Gothic ProN", "Hiragino Sans",
          "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand-mini {
  font-weight: 900; letter-spacing: .08em; font-size: 20px;
  text-decoration: none; display: inline-flex; gap: 2px;
}
.brand-mini .c1 { color: var(--teal); }
.brand-mini .c2 { color: var(--red); }
.brand-mini .c3 { color: var(--lime); }
.brand-mini .c4 { color: var(--ink); }

/* 画像ロゴ（白背景PNGを multiply で馴染ませる） */
.brand-logo { display: inline-flex; align-items: center; line-height: 0; }
.brand-logo img { height: 34px; width: auto; mix-blend-mode: multiply; }
.footer-logo img { height: 30px; }
.hero-logo { margin: 0 0 6px; line-height: 0; }
.hero-logo img { width: min(640px, 84%); height: auto; margin: 0 auto; mix-blend-mode: multiply; }

.nav { display: flex; gap: 26px; align-items: center; }
.nav a {
  text-decoration: none; font-size: 14px; font-weight: 700;
  color: var(--ink-2); transition: color .2s var(--ease);
}
.nav a:hover { color: var(--teal); }
.nav .btn-x {
  color: #fff; background: var(--ink); padding: 8px 16px;
  border-radius: 999px; font-size: 13px;
}
.nav .btn-x:hover { color: #fff; background: var(--teal); }
.nav-toggle { display: none; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: clamp(72px, 12vw, 140px) 0 clamp(64px, 10vw, 120px);
  text-align: center;
}
.hero::before, .hero::after {
  content: ""; position: absolute; border-radius: 50%;
  filter: blur(60px); opacity: .28; z-index: 0;
}
.hero::before { width: 460px; height: 460px; background: var(--teal); top: -120px; left: -120px; }
.hero::after  { width: 420px; height: 420px; background: var(--lime); bottom: -160px; right: -100px; }

.hero .wrap { position: relative; z-index: 1; }

.wordmark {
  font-weight: 900; letter-spacing: .04em; line-height: .9;
  font-size: clamp(52px, 13vw, 148px);
  margin: 0 0 8px;
}
.wordmark span { display: inline-block; }
.wordmark .s { color: var(--ink); }
.wordmark .u { color: var(--ink); }
.wordmark .k { color: var(--teal); }
.wordmark .i { color: var(--red); }
.wordmark .m { color: var(--teal); }
.wordmark .i2{ color: var(--lime); }
.wordmark .x { color: var(--ink); }

.tagline {
  font-size: clamp(20px, 3.6vw, 34px); font-weight: 800;
  margin: 18px 0 6px; letter-spacing: .06em;
}
.tagline .accent {
  background: linear-gradient(transparent 62%, var(--lime) 62%);
  padding: 0 .1em;
}
.lead {
  max-width: 640px; margin: 14px auto 0; color: var(--ink-2);
  font-size: clamp(15px, 2vw, 17px);
}
.cta-row { margin-top: 34px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 26px; border-radius: 999px; font-weight: 800;
  text-decoration: none; font-size: 15px; transition: transform .18s var(--ease), box-shadow .18s var(--ease);
  box-shadow: 0 6px 0 0 var(--shadow);
}
.btn:active { transform: translateY(4px); box-shadow: 0 2px 0 0 var(--shadow); }
.btn-primary { background: var(--teal); color: #fff; }
.btn-ghost   { background: #fff; color: var(--ink); box-shadow: 0 6px 0 0 var(--line); }

/* ---------- Section base ---------- */
section { padding: clamp(64px, 9vw, 110px) 0; }
.section-tag {
  display: inline-block; font-size: 13px; font-weight: 800; letter-spacing: .14em;
  color: var(--teal); text-transform: uppercase; margin-bottom: 12px;
}
.section-title {
  font-size: clamp(26px, 4.4vw, 42px); font-weight: 900; margin: 0 0 18px; letter-spacing: .02em;
}
.section-lead { color: var(--ink-2); max-width: 620px; font-size: 16px; }

/* ---------- About / Concept ---------- */
.about { background: var(--paper-2); }
.about .wrap { text-align: center; }
.about .section-tag { color: var(--teal); }
.about .section-title { max-width: 20em; margin-left: auto; margin-right: auto; }

/* ---------- Mix / cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 44px; }
.card {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 26px;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
  background: #fff;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 18px 36px rgba(0,0,0,.08); }
.card .dot { width: 46px; height: 46px; border-radius: 14px; margin-bottom: 18px; }
.card.c-teal .dot { background: var(--teal); }
.card.c-red  .dot { background: var(--red); }
.card.c-lime .dot { background: var(--lime); }
.card h3 { margin: 0; font-size: 20px; font-weight: 900; }
.card p { margin: 8px 0 0; color: var(--ink-2); font-size: 15px; }

.value-closing {
  margin: 44px auto 0; max-width: 30em; text-align: center;
  font-size: clamp(16px, 2.2vw, 19px); font-weight: 700; color: var(--ink);
  line-height: 2;
}

.concept-list {
  margin: 28px auto 0; text-align: center;
  font-size: clamp(17px, 2.4vw, 21px); font-weight: 800;
  line-height: 2.1; letter-spacing: .04em; color: var(--ink);
}

/* ---------- Contact ---------- */
.contact { text-align: center; }
.contact .cta-row { justify-content: center; }
.contact .btn-primary { background: var(--ink); box-shadow: 0 6px 0 0 var(--shadow); }
.contact .btn-primary:hover { background: var(--teal); }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line); padding: 40px 0; text-align: center;
  color: var(--ink-2); font-size: 14px;
}
.site-footer .brand-mini { font-size: 18px; }
.site-footer .fnav { margin: 16px 0; display: flex; gap: 22px; justify-content: center; flex-wrap: wrap; }
.site-footer .fnav a { text-decoration: none; color: var(--ink-2); font-weight: 700; }
.site-footer .fnav a:hover { color: var(--teal); }
.copyright { color: var(--shadow); font-size: 12px; margin-top: 8px; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 780px) {
  .nav { position: fixed; inset: 64px 0 auto 0; background: #fff; flex-direction: column;
         gap: 0; padding: 8px 0; border-bottom: 1px solid var(--line); display: none; }
  .nav.open { display: flex; }
  .nav a { padding: 14px 24px; width: 100%; }
  .nav-toggle { display: inline-flex; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; }
  .nav-toggle span { width: 24px; height: 2px; background: var(--ink); display: block; }
  .about .wrap { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { transition: none; opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}