/*
Theme Name: D-net
Theme URI: https://example.com/
Author: D-net
Description: D-net株式会社（仮）コーポレートサイト用オリジナルテーマ。名刺管理サービス・学生向け1問1答暗記サイトの紹介を含む。
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 7.4
Text Domain: d-net
*/

/* =========================================================
   CSS Variables
   ========================================================= */
:root {
  --color-primary: #2e7d4f;
  --color-primary-dark: #1f5c38;
  --color-primary-light: #6fbf8b;
  --color-primary-bg: #eaf5ee;
  --color-accent: #f2a03d;
  --color-bg: #f7faf8;
  --color-surface: #ffffff;
  --color-text: #223027;
  --color-text-muted: #5b6b62;
  --color-border: #dfeae3;
  --radius: 12px;
  --shadow: 0 4px 16px rgba(31, 92, 56, 0.08);
  --max-width: 1120px;
  --font-base: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
}

/* =========================================================
   Reset / Base
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  font-size: 16px;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { line-height: 1.4; margin: 0 0 0.6em; color: var(--color-text); }
p { margin: 0 0 1em; }
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.screen-reader-text {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
}

/* =========================================================
   Header
   ========================================================= */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.site-branding a {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.site-logo-mark {
  width: 40px; height: 40px;
  flex-shrink: 0;
  display: block;
}
.site-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
  letter-spacing: 0.02em;
}
.site-tagline {
  font-size: 11px;
  color: var(--color-text-muted);
  display: block;
}
.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  width: 42px; height: 42px;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  width: 20px; height: 2px;
  background: var(--color-text);
  margin: 4px auto;
  transition: 0.2s;
}
.nav-menu {
  display: flex;
  gap: 28px;
  align-items: center;
}
.nav-menu a {
  color: var(--color-text);
  font-weight: 600;
  font-size: 14.5px;
}
.nav-menu a:hover { color: var(--color-primary-dark); text-decoration: none; }
.nav-menu .btn { margin-left: 4px; }

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: 0.2s;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff !important;
}
.btn-primary:hover { background: var(--color-primary-dark); text-decoration: none; }
.btn-outline {
  background: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary-dark) !important;
}
.btn-outline:hover { background: var(--color-primary-bg); text-decoration: none; }

/* =========================================================
   Hero
   ========================================================= */
.hero {
  background: linear-gradient(160deg, var(--color-primary-bg) 0%, var(--color-bg) 60%);
  padding: 88px 24px 96px;
}
.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}
.hero-eyebrow {
  display: inline-block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-primary-dark);
  font-size: 13px;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(28px, 4.5vw, 44px);
  font-weight: 800;
  margin-bottom: 20px;
}
.hero h1 .accent { color: var(--color-primary-dark); }
.hero-lead {
  color: var(--color-text-muted);
  font-size: 17px;
  max-width: 640px;
  margin: 0 auto 32px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* =========================================================
   Sections
   ========================================================= */
.section { padding: 80px 24px; }
.section-alt { background: var(--color-surface); }
.section-header { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.section-eyebrow {
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 10px;
}
.section-header h2 { font-size: 30px; font-weight: 800; }
.section-header p { color: var(--color-text-muted); }

/* =========================================================
   Service cards
   ========================================================= */
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  position: relative;
}
.service-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.service-icon svg { width: 26px; height: 26px; }
.service-card h3 { font-size: 19px; font-weight: 700; }
.service-card p { color: var(--color-text-muted); font-size: 14.5px; }
.service-card .service-action { margin-top: 18px; }
.service-card .service-action .btn { padding: 9px 22px; font-size: 13.5px; }
.badge {
  position: absolute;
  top: 24px; right: 24px;
  background: var(--color-accent);
  color: #fff;
  font-size: 11.5px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  letter-spacing: 0.04em;
}

/* =========================================================
   Company info table
   ========================================================= */
.info-table {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  border-collapse: collapse;
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.info-table tr { border-bottom: 1px solid var(--color-border); }
.info-table tr:last-child { border-bottom: none; }
.info-table th, .info-table td {
  text-align: left;
  padding: 18px 24px;
  font-size: 15px;
  vertical-align: top;
}
.info-table th {
  width: 30%;
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
  font-weight: 700;
}
.info-placeholder {
  color: var(--color-text-muted);
  font-style: normal;
  background: #fdf6ec;
  border: 1px dashed #e5c48a;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 13px;
}

/* =========================================================
   News list
   ========================================================= */
.news-list { max-width: 760px; margin: 0 auto; }
.news-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}
.news-item time {
  flex-shrink: 0;
  width: 110px;
  color: var(--color-text-muted);
  font-size: 13.5px;
  padding-top: 2px;
}
.news-item a { font-weight: 600; color: var(--color-text); }
.news-empty {
  text-align: center;
  color: var(--color-text-muted);
  padding: 32px;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px dashed var(--color-border);
}

/* =========================================================
   Contact form
   ========================================================= */
.contact-wrap {
  max-width: 640px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
}
.form-row { margin-bottom: 22px; }
.form-row label {
  display: block;
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 8px;
}
.form-row .required { color: #d1483f; font-size: 12px; margin-left: 4px; }
.form-row input[type="text"],
.form-row input[type="email"],
.form-row textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  background: var(--color-bg);
}
.form-row input:focus, .form-row textarea:focus {
  outline: 2px solid var(--color-primary-light);
  outline-offset: 1px;
}
.form-row textarea { min-height: 140px; resize: vertical; }
.form-hp { position: absolute; left: -9999px; top: -9999px; }
.form-message {
  padding: 14px 18px;
  border-radius: 8px;
  margin-bottom: 24px;
  font-size: 14.5px;
}
.form-message.success { background: var(--color-primary-bg); color: var(--color-primary-dark); border: 1px solid var(--color-primary-light); }
.form-message.error { background: #fdecea; color: #a23327; border: 1px solid #f0b6ae; }
.form-message ul { margin: 6px 0 0 18px; list-style: disc; }
.submit-row { text-align: right; }
.submit-row .btn { width: 100%; border: none; }

/* =========================================================
   CTA band
   ========================================================= */
.cta-band {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
  text-align: center;
  padding: 64px 24px;
}
.cta-band h2 { color: #fff; font-size: 26px; }
.cta-band p { color: rgba(255,255,255,0.85); margin-bottom: 28px; }
.cta-band .btn-outline { border-color: #fff; color: #fff !important; }
.cta-band .btn-outline:hover { background: rgba(255,255,255,0.12); }

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  background: #16281d;
  color: #cfe0d5;
  padding: 56px 24px 28px;
}
.footer-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-grid h4 { color: #fff; font-size: 14px; margin-bottom: 16px; }
.footer-grid p, .footer-grid a { color: #a9c2b1; font-size: 13.5px; }
.footer-grid a:hover { color: #fff; }
.footer-grid li { margin-bottom: 10px; }
.footer-bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 24px;
  font-size: 12.5px;
  color: #82997f;
  text-align: center;
}

/* =========================================================
   Page header (inner pages)
   ========================================================= */
.page-hero {
  background: var(--color-primary-bg);
  padding: 56px 24px;
  text-align: center;
}
.page-hero h1 { font-size: 30px; font-weight: 800; }
.page-hero p { color: var(--color-text-muted); max-width: 560px; margin: 0 auto; }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .menu-toggle { display: block; }
  .nav-menu {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--color-surface);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 24px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--color-border);
    display: none;
  }
  .nav-menu.is-open { display: flex; }
  .nav-menu .btn { margin-left: 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 56px 20px 64px; }
  .section { padding: 56px 20px; }
  .contact-wrap { padding: 28px; }
}