/* ============================================
   PARONGO — Main Stylesheet  (Light Theme)
   ============================================ */
:root {
  --bg:#ffffff; --bg-surface:#f7f8fa; --bg-card:#ffffff; --bg-card-hover:#f4f6fa;
  --border:#e2e6ed; --border-accent:rgba(0,180,150,0.35);
  --text:#1a1f2e; --text-muted:#4a5268; --text-dim:#8a92a8;
  --accent:#009e80; --accent-2:#2563eb;
  --accent-light:rgba(0,158,128,0.07); --accent-border:rgba(0,158,128,0.22);
  --font-body:'Noto Sans JP',sans-serif; --font-mono:'Space Mono',monospace;
  --radius:4px; --radius-md:8px; --nav-h:64px; --container:1100px;
  --ease-out:cubic-bezier(0.16,1,0.3,1);
  --shadow-sm:0 1px 4px rgba(0,0,0,0.06),0 0 0 1px rgba(0,0,0,0.04);
  --shadow-md:0 4px 16px rgba(0,0,0,0.08),0 0 0 1px rgba(0,0,0,0.04);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:15px;line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}ul{list-style:none}img{display:block;max-width:100%}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}

/* HEADER */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-h);background:rgba(255,255,255,0.96);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);transition:box-shadow 0.3s}
.site-header.scrolled{box-shadow:0 2px 12px rgba(0,0,0,0.08)}
.nav-inner{max-width:var(--container);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;gap:32px}
.logo{display:flex;align-items:center;gap:8px;flex-shrink:0}
.logo-img{height:36px;width:auto;display:block;object-fit:contain}
.logo-img-footer{height:34px;width:auto;display:block;object-fit:contain;opacity:1}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{padding:6px 14px;font-size:13px;font-weight:500;color:var(--text-muted);border-radius:var(--radius);transition:color 0.2s,background 0.2s;white-space:nowrap}
.nav-link:hover,.nav-link.active{color:var(--text);background:var(--bg-surface)}
.nav-cta{background:var(--accent)!important;color:#fff!important;font-weight:700;padding:6px 16px;border-radius:var(--radius)}
.nav-cta:hover{opacity:0.88}
.has-dropdown{position:relative}
/* ドロップダウンはJS(main.js)で open クラスを付与して制御 */
.dropdown{position:absolute;top:calc(100% + 4px);left:0;background:#fff;border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-md);padding:8px 0;min-width:210px;opacity:0;visibility:hidden;transition:opacity 0.15s var(--ease-out),visibility 0.15s;pointer-events:none}
.dropdown.open{opacity:1;visibility:visible;pointer-events:all}
.dropdown a{display:block;padding:8px 16px;font-size:13px;color:var(--text-muted);transition:color 0.15s,background 0.15s}
.dropdown a:hover{color:var(--accent);background:var(--accent-light)}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;margin-left:auto;padding:8px}
.hamburger span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:all 0.25s}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-menu{display:none;background:#fff;border-top:1px solid var(--border);padding:16px 24px 24px}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:12px 0;font-size:15px;border-bottom:1px solid var(--border);color:var(--text-muted)}
.mobile-menu a:hover{color:var(--accent)}

/* HERO */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden;padding:calc(var(--nav-h) + 60px) 24px 80px;background:linear-gradient(160deg,#f0faf8 0%,#eef3ff 50%,#f7f8fa 100%)}
.hero-bg{position:absolute;inset:0;z-index:0}
.grid-overlay{position:absolute;inset:0;background-image:linear-gradient(rgba(0,158,128,0.06) 1px,transparent 1px),linear-gradient(90deg,rgba(0,158,128,0.06) 1px,transparent 1px);background-size:48px 48px;mask-image:radial-gradient(ellipse 80% 80% at 50% 50%,black 30%,transparent 100%)}
.glow{position:absolute;border-radius:50%;filter:blur(80px);pointer-events:none}
.glow-1{width:500px;height:400px;top:10%;left:-10%;background:radial-gradient(circle,rgba(0,158,128,0.15) 0%,transparent 70%)}
.glow-2{width:400px;height:400px;bottom:10%;right:-5%;background:radial-gradient(circle,rgba(37,99,235,0.1) 0%,transparent 70%)}
.hero-content{position:relative;z-index:1;max-width:720px;margin:0 auto;text-align:center}
.hero-label{display:inline-block;font-family:var(--font-mono);font-size:11px;letter-spacing:0.2em;color:var(--accent);background:var(--accent-light);border:1px solid var(--accent-border);border-radius:20px;padding:4px 14px;margin-bottom:28px;text-transform:uppercase}
.hero-title{font-size:clamp(28px,5vw,52px);font-weight:700;line-height:1.35;letter-spacing:-0.02em;margin-bottom:24px;color:var(--text)}
.hero-title em{font-style:normal;background:linear-gradient(135deg,var(--accent) 0%,var(--accent-2) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-sub{font-size:16px;color:var(--text-muted);line-height:1.85;margin-bottom:40px}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.hero-scroll-hint{position:absolute;bottom:32px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:10px;z-index:1}
.hero-scroll-hint span{font-family:var(--font-mono);font-size:9px;letter-spacing:0.2em;color:var(--text-dim)}
.scroll-line{width:1px;height:40px;background:linear-gradient(to bottom,var(--text-dim),transparent);animation:scrollPulse 2s infinite}
@keyframes scrollPulse{0%,100%{opacity:0.4}50%{opacity:1}}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 22px;font-size:14px;font-weight:600;font-family:var(--font-body);border-radius:var(--radius);border:1px solid transparent;cursor:pointer;transition:all 0.2s var(--ease-out);white-space:nowrap}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#008570;transform:translateY(-1px);box-shadow:0 6px 20px rgba(0,158,128,0.25)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--border)}
.btn-ghost:hover{border-color:#b0b8c8;background:var(--bg-surface)}
.btn-large{padding:14px 32px;font-size:15px}

/* SECTIONS */
.section{padding:96px 0}
.section-tag{font-family:var(--font-mono);font-size:11px;letter-spacing:0.2em;color:var(--accent);text-transform:uppercase;margin-bottom:16px}
.section-title{font-size:clamp(22px,3.5vw,36px);font-weight:700;letter-spacing:-0.02em;margin-bottom:16px;color:var(--text)}
.section-lead{color:var(--text-muted);font-size:15px;max-width:600px;margin-bottom:56px}

/* THOUGHTS */
.thoughts{background:var(--bg-surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.thoughts-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}
.thought-block{background:#fff;padding:48px 40px}
.thought-block.highlight{background:linear-gradient(135deg,rgba(0,158,128,0.04) 0%,rgba(37,99,235,0.04) 100%)}
.thought-heading{font-size:18px;font-weight:700;margin-bottom:16px;color:var(--text)}
.thought-block p{color:var(--text-muted);line-height:1.85}
.mission-text strong{color:var(--accent);font-weight:600}

/* SOLUTION CARDS */
.solution-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}
.sol-card{background:#fff;padding:32px 28px;transition:background 0.2s}
.sol-card:hover{background:var(--bg-surface)}
.sol-card.featured{background:linear-gradient(160deg,rgba(0,158,128,0.04) 0%,rgba(37,99,235,0.04) 100%)}
.sol-card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.sol-tag{font-family:var(--font-mono);font-size:10px;letter-spacing:0.15em;color:var(--accent);background:var(--accent-light);border:1px solid var(--accent-border);padding:3px 8px;border-radius:2px;text-transform:uppercase}
.sol-num{font-family:var(--font-mono);font-size:11px;color:var(--text-dim)}
.sol-title{font-size:18px;font-weight:700;margin-bottom:12px;color:var(--text)}
.sol-desc{font-size:13.5px;color:var(--text-muted);line-height:1.8;margin-bottom:20px}
.sol-points{list-style:none;margin-bottom:24px;display:flex;flex-direction:column;gap:6px}
.sol-points li{font-size:12.5px;color:var(--text-muted);padding-left:16px;position:relative}
.sol-points li::before{content:'—';position:absolute;left:0;color:var(--accent);font-size:10px}
.sol-link{font-size:13px;font-weight:600;color:var(--accent);font-family:var(--font-mono);letter-spacing:0.05em;transition:opacity 0.2s}
.sol-link:hover{opacity:0.7}

/* WHY */
.why-parongo{background:#fff}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.why-item{padding:36px 28px;border:1px solid var(--border);border-radius:var(--radius-md);background:#fff;transition:border-color 0.25s,transform 0.25s,box-shadow 0.25s}
.why-item:hover{border-color:var(--accent-border);transform:translateY(-4px);box-shadow:var(--shadow-md)}
.why-icon{font-family:var(--font-mono);font-size:28px;font-weight:700;color:var(--accent);margin-bottom:16px}
.why-item h3{font-size:16px;font-weight:700;margin-bottom:12px;color:var(--text)}
.why-item p{font-size:13.5px;color:var(--text-muted);line-height:1.85}

/* CTA */
.cta-section{background:linear-gradient(135deg,#f0faf8 0%,#eef3ff 100%);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-text h2{font-size:22px;font-weight:700;margin-bottom:10px;color:var(--text)}
.cta-text p{color:var(--text-muted);font-size:14px;max-width:480px}

/* FOOTER — dark background で文字を白系に */
.site-footer{background:#1a1f2e;padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:48px}
.footer-brand{display:flex;flex-direction:column;gap:12px}
.footer-brand p{font-size:12px;color:#8a92a8;line-height:1.85;margin-top:4px}
.footer-links h4{font-family:var(--font-mono);font-size:10px;letter-spacing:0.15em;color:#5a6272;text-transform:uppercase;margin-bottom:16px}
.footer-links li{margin-bottom:10px}
.footer-links a{font-size:13px;color:#8a92a8;transition:color 0.2s}
.footer-links a:hover{color:#00dcb4}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:24px;font-size:12px;color:#5a6272;font-family:var(--font-mono)}

/* INNER PAGE HERO */
.page-hero{padding:calc(var(--nav-h) + 64px) 0 56px;background:var(--bg-surface);border-bottom:1px solid var(--border)}
.page-hero h1{font-size:clamp(24px,4vw,44px);font-weight:700;letter-spacing:-0.02em;margin-bottom:20px;color:var(--text)}
.page-hero p{font-size:16px;color:var(--text-muted);max-width:600px;line-height:1.85}

/* ABOUT */
.profile-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-md);padding:28px 24px;transition:border-color 0.25s,box-shadow 0.25s}
.profile-card:hover{border-color:var(--accent-border);box-shadow:var(--shadow-sm)}
.profile-role{font-family:var(--font-mono);font-size:11px;letter-spacing:0.12em;color:var(--accent);text-transform:uppercase;margin-bottom:10px}
.profile-name{font-size:18px;font-weight:700;margin-bottom:6px;color:var(--text)}
.profile-title{font-size:13px;color:var(--text-muted)}
.company-table{width:100%;border-collapse:collapse;margin-top:24px}
.company-table tr{border-bottom:1px solid var(--border)}
.company-table th{width:200px;text-align:left;padding:16px 0;font-size:13px;font-weight:500;color:var(--text-dim);font-family:var(--font-mono);letter-spacing:0.08em;vertical-align:top}
.company-table td{padding:16px 0 16px 24px;font-size:14px;color:var(--text-muted);line-height:1.85}

/* CONTACT */
.contact-form{display:flex;flex-direction:column;gap:20px;max-width:600px}
.form-group{display:flex;flex-direction:column;gap:8px}
.form-label{font-size:13px;font-weight:500;color:var(--text-muted);letter-spacing:0.04em}
.form-label span{color:var(--accent);font-size:11px;margin-left:6px}
.form-input,.form-textarea,.form-select{background:#fff;border:1px solid var(--border);color:var(--text);font-family:var(--font-body);font-size:14px;padding:11px 14px;border-radius:var(--radius);outline:none;transition:border-color 0.2s;width:100%}
.form-input:focus,.form-textarea:focus,.form-select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,158,128,0.1)}
.form-textarea{resize:vertical;min-height:140px}

/* NEWS / INSIGHTS */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-md);padding:24px;transition:border-color 0.25s,transform 0.25s,box-shadow 0.25s}
.news-card:hover{border-color:var(--accent-border);transform:translateY(-3px);box-shadow:var(--shadow-md)}
.news-date{font-family:var(--font-mono);font-size:11px;color:var(--text-dim);letter-spacing:0.1em;margin-bottom:10px}
.news-category{font-size:11px;color:var(--accent);background:var(--accent-light);border:1px solid var(--accent-border);padding:2px 8px;border-radius:2px;display:inline-block;margin-bottom:12px;font-family:var(--font-mono);letter-spacing:0.1em}
.news-title{font-size:15px;font-weight:600;line-height:1.5;margin-bottom:10px;color:var(--text)}
.news-excerpt{font-size:13px;color:var(--text-muted);line-height:1.75}

/* UTILITIES */
.text-accent{color:var(--accent)}.text-muted{color:var(--text-muted)}.mt-4{margin-top:16px}.mt-8{margin-top:32px}
[data-reveal]{opacity:0;transform:translateY(20px);transition:opacity 0.6s var(--ease-out),transform 0.6s var(--ease-out)}
[data-reveal].revealed{opacity:1;transform:translateY(0)}

/* RESPONSIVE */
@media(max-width:960px){.solution-cards{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr;gap:32px}.thoughts-grid{grid-template-columns:1fr}}
@media(max-width:768px){.nav-links{display:none}.hamburger{display:flex}.solution-cards{grid-template-columns:1fr}.why-grid{grid-template-columns:1fr}.cta-inner{flex-direction:column;align-items:flex-start}.footer-grid{grid-template-columns:1fr;gap:32px}.news-grid{grid-template-columns:1fr}.section{padding:64px 0}}
@media(max-width:480px){.hero-actions{flex-direction:column;align-items:center}.company-table th{width:120px;font-size:12px}}