/* ============================================
   Ecold LINK LP - Base Styles
   ============================================ */

:root {
  /* Brand Colors */
  --brand: #2BB4E6;
  --brand-dark: #1A9BC9;
  --brand-deep: #0B5E7F;
  --accent-yellow: #FFCE28;
  --accent-purple: #B67AD6;
  --accent-pink: #F58AA5;
  --accent-green: #93C846;
  --accent-orange: #F5A623;

  /* Neutrals */
  --ink: #10233A;
  --ink-2: #2D3E52;
  --muted: #6B7A8A;
  --line: #E4EAF0;
  --card: #FFFFFF;
  --bg: #FDFAF3;
  --bg-cream: #FCF5E4;
  --bg-blue: #EAF6FC;

  /* Typography */
  --font-jp: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  --font-num: "Manrope", -apple-system, BlinkMacSystemFont, sans-serif;

  /* Layout */
  --container: 1180px;
  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --shadow-sm: 0 2px 8px rgba(15, 32, 51, 0.06);
  --shadow: 0 8px 30px rgba(15, 32, 51, 0.08);
  --shadow-lg: 0 24px 60px rgba(15, 32, 51, 0.12);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-jp);
  font-weight: 500;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

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

/* ============================================
   Nav
   ============================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid rgba(15, 32, 51, 0.06);
}
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--brand);
}
.nav-logo img { width: 40px; height: 40px; border-radius: 10px; }
.nav-since {
  margin-left: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  background: #e6f4fb;
  color: var(--brand);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1;
  white-space: nowrap;
}
.nav-links {
  display: flex;
  gap: 28px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-2);
}
.nav-links a { transition: color 0.18s; }
.nav-links a:hover { color: var(--brand); }
.nav-cta {
  display: flex;
  gap: 10px;
  align-items: center;
}

@media (max-width: 860px) {
  .nav-links { display: none; }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: 999px;
  font-family: inherit;
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: none;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--brand);
  color: white;
  box-shadow: 0 8px 22px rgba(43, 180, 230, 0.35);
}
.btn-primary:hover {
  background: var(--brand-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(43, 180, 230, 0.45);
}
.btn-nav-consult {
  background: linear-gradient(135deg, #6acb50, #43a931);
  color: #fff;
  box-shadow: 0 8px 22px rgba(67, 169, 49, 0.28);
}
.btn-nav-consult:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(67, 169, 49, 0.38);
  filter: brightness(1.03);
}
/* ヘッダー内のCTAは少しコンパクト */
.nav-cta .btn { padding: 11px 20px; font-size: 14px; }

@media (max-width: 720px) {
  .nav-cta .btn-nav-consult { display: none; }
  .nav-since { display: none; }
}
.btn-outline {
  background: white;
  color: var(--ink);
  border: 1.5px solid var(--line);
}
.btn-outline:hover {
  border-color: var(--brand);
  color: var(--brand);
  transform: translateY(-2px);
}
.btn-yellow {
  background: var(--accent-yellow);
  color: var(--ink);
  box-shadow: 0 8px 22px rgba(255, 206, 40, 0.4);
}
.btn-yellow:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(255, 206, 40, 0.5);
}
.btn-lg {
  padding: 18px 34px;
  font-size: 16px;
}
.btn-arrow::after {
  content: "→";
  font-weight: 900;
  transition: transform 0.16s ease;
}
.btn-arrow:hover::after { transform: translateX(4px); }

/* ============================================
   Section helpers
   ============================================ */
section {
  padding: 110px 0;
  position: relative;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--brand);
  text-transform: uppercase;
  margin-bottom: 20px;
}
.eyebrow::before {
  content: "";
  width: 28px; height: 2px;
  background: var(--brand);
  border-radius: 2px;
}
.section-title {
  font-size: clamp(28px, 3.6vw, 46px);
  font-weight: 900;
  line-height: 1.35;
  letter-spacing: 0.01em;
  margin: 0 0 20px;
  color: var(--ink);
  text-wrap: balance;
}
.section-lead {
  font-size: 17px;
  color: var(--muted);
  max-width: 720px;
  line-height: 1.9;
  text-wrap: pretty;
}
.hl-yellow {
  background: linear-gradient(transparent 62%, rgba(255, 206, 40, 0.55) 62%);
  padding: 0 2px;
}
.hl-blue {
  color: var(--brand);
}

/* Waves */
.wave-divider {
  height: 24px;
  background-image: url("assets/wave.png");
  background-repeat: repeat-x;
  background-size: auto 100%;
  background-position: center;
}