/* ==========================================================================
   Vietsora - Shiro Minimal
   Design: White minimal, Japanese-style startup
   Colors: Orange #EE9826 (primary) + Navy #1E3A5F (secondary)
   ========================================================================== */

/* Reset */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:'Noto Sans JP','Inter','Helvetica Neue',Arial,sans-serif;font-weight:400;font-size:15px;line-height:1.75;color:#1a1a1a;background:#fff;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:opacity .2s ease}
a:hover{opacity:.65}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul,ol{list-style:none}

/* Design tokens */
:root{
  --c-orange:#EE9826;
  --c-orange-dark:#D67E10;
  --c-orange-light:#FDF5E9;
  --c-navy:#1E3A5F;
  --c-navy-dark:#15293F;
  --c-navy-light:#E8EEF5;
  --c-text:#1a1a1a;
  --c-text-muted:#666;
  --c-text-light:#999;
  --c-border:#e8e8e8;
  --c-border-light:#f0f0f0;
  --c-bg-subtle:#fafafa;
  --max-w:1180px;
  --pad-x:28px;
}

/* Typography */
h1,h2,h3,h4{font-weight:500;line-height:1.25;letter-spacing:-0.02em;color:var(--c-navy)}
h1{font-size:clamp(32px,5vw,56px);letter-spacing:-0.03em;line-height:1.15}
h2{font-size:clamp(24px,3.5vw,36px)}
h3{font-size:clamp(18px,2vw,22px)}
h4{font-size:16px}
p{color:var(--c-text-muted);line-height:1.85}

.eyebrow{font-size:11px;font-weight:500;letter-spacing:0.14em;text-transform:uppercase;color:var(--c-orange);display:inline-block}
.eyebrow-muted{font-size:10px;font-weight:500;letter-spacing:0.12em;text-transform:uppercase;color:var(--c-text-light)}

/* Layout */
.wrap{max-width:var(--max-w);margin:0 auto;padding:0 var(--pad-x)}
section{padding:80px 0}
.sec-sm{padding:56px 0}

/* ==========================================================================
   HEADER
   ========================================================================== */
.site-header{position:sticky;top:0;background:rgba(255,255,255,0.96);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:0.5px solid var(--c-border-light);z-index:100}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;max-width:var(--max-w);margin:0 auto;padding:0 var(--pad-x)}
.logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:500;letter-spacing:-0.02em;color:var(--c-navy)}
.logo-mark{width:28px;height:28px;display:flex;align-items:center;justify-content:center}
.logo-mark svg, .logo-mark img{width:100%;height:100%;object-fit:contain}
.nav-links{display:flex;gap:32px;align-items:center}
.nav-links a{font-size:13px;color:var(--c-text);position:relative;transition:color .2s}
.nav-links a:hover{opacity:1;color:var(--c-orange)}
.nav-links a.active{color:var(--c-orange)}
.lang-switch{display:flex;gap:2px;font-size:11px;color:var(--c-text-light);align-items:center;border:0.5px solid var(--c-border);border-radius:100px;padding:4px 12px}
.lang-switch a{color:var(--c-text-light)}
.lang-switch a.active{color:var(--c-navy);font-weight:500}
.lang-sep{color:var(--c-border)}
.nav-cta{font-size:13px;padding:8px 18px;background:var(--c-navy);color:#fff;border-radius:6px;font-weight:500;transition:background .2s}
.nav-cta:hover{background:var(--c-navy-dark);opacity:1}

.menu-toggle{display:none;width:32px;height:32px;flex-direction:column;justify-content:center;gap:5px}
.menu-toggle span{display:block;width:20px;height:1.5px;background:var(--c-navy);transition:all .2s}

/* Mobile nav */
@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;padding:24px var(--pad-x);gap:20px;border-bottom:0.5px solid var(--c-border);box-shadow:0 8px 24px rgba(0,0,0,0.04)}
  .nav-links.open{display:flex}
  .menu-toggle{display:flex}
}

/* ==========================================================================
   HERO
   ========================================================================== */
.hero{padding:80px 0 72px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1fr;gap:40px;align-items:center}
@media(min-width:900px){.hero-grid{grid-template-columns:1.3fr 1fr;gap:64px}}
.hero-eyebrow{margin-bottom:20px}
.hero-title{margin-bottom:24px}
.hero-title em{color:var(--c-orange);font-style:normal}
.hero-desc{font-size:16px;line-height:1.85;color:var(--c-text-muted);max-width:520px;margin-bottom:32px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.btn{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:500;padding:12px 24px;border-radius:6px;transition:all .2s}
.btn-primary{background:var(--c-orange);color:#fff}
.btn-primary:hover{background:var(--c-orange-dark);opacity:1;transform:translateY(-1px)}
.btn-ghost{color:var(--c-navy);border-bottom:1px solid var(--c-navy);padding:4px 0;border-radius:0}
.btn-ghost:hover{color:var(--c-orange);border-color:var(--c-orange);opacity:1}

.hero-visual{position:relative;aspect-ratio:1;max-width:420px;margin-left:auto;display:flex;align-items:center;justify-content:center}
.hero-visual svg{width:100%;height:auto}

/* ==========================================================================
   STATS
   ========================================================================== */
.stats{border-top:0.5px solid var(--c-border-light);border-bottom:0.5px solid var(--c-border-light);padding:40px 0}
.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0}
@media(min-width:700px){.stats-grid{grid-template-columns:repeat(4,1fr)}}
.stat{padding:12px 24px;border-right:0.5px solid var(--c-border-light)}
.stat:last-child{border-right:none}
.stat:nth-child(2){border-right:none}
@media(min-width:700px){.stat:nth-child(2){border-right:0.5px solid var(--c-border-light)}}
.stat-num{font-size:28px;font-weight:500;color:var(--c-navy);letter-spacing:-0.02em;line-height:1.1}
.stat-num em{font-style:normal;color:var(--c-orange);font-size:18px;margin-left:2px}
.stat-label{font-size:11px;color:var(--c-text-light);letter-spacing:0.08em;text-transform:uppercase;margin-top:6px}

/* ==========================================================================
   SECTION HEADER
   ========================================================================== */
.sec-head{margin-bottom:48px;max-width:640px}
.sec-head.center{margin:0 auto 48px;text-align:center}
.sec-head .eyebrow{margin-bottom:14px}
.sec-head h2{margin-bottom:14px}
.sec-head p{font-size:15px}

/* ==========================================================================
   SERVICES GRID
   ========================================================================== */
.services-grid{display:grid;grid-template-columns:1fr;gap:0;border-top:0.5px solid var(--c-border-light)}
@media(min-width:700px){.services-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1000px){.services-grid{grid-template-columns:repeat(3,1fr)}}

.service-card{padding:32px 28px 40px;border-bottom:0.5px solid var(--c-border-light);border-right:0.5px solid var(--c-border-light);transition:background .3s;position:relative}
.service-card:hover{background:var(--c-bg-subtle)}
@media(min-width:700px){
  .service-card:nth-child(2n){border-right:none}
}
@media(min-width:1000px){
  .service-card:nth-child(2n){border-right:0.5px solid var(--c-border-light)}
  .service-card:nth-child(3n){border-right:none}
}
.service-num{font-size:11px;color:var(--c-orange);letter-spacing:0.12em;font-weight:500;margin-bottom:20px}
.service-card h3{margin-bottom:12px;color:var(--c-navy)}
.service-card p{font-size:14px;line-height:1.75}
.service-tags{margin-top:20px;display:flex;gap:6px;flex-wrap:wrap}
.service-tag{font-size:10px;color:var(--c-text-muted);border:0.5px solid var(--c-border);padding:3px 10px;border-radius:100px;letter-spacing:0.04em}

/* ==========================================================================
   TWO-COLUMN SECTION
   ========================================================================== */
.two-col{display:grid;grid-template-columns:1fr;gap:56px;align-items:start}
@media(min-width:900px){.two-col{grid-template-columns:1fr 1.2fr;gap:80px}}
.two-col .col-text h2{margin-bottom:20px}
.two-col .col-text p{margin-bottom:16px}
.feature-list{display:flex;flex-direction:column;gap:24px;margin-top:8px}
.feature-item{display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:start;padding:18px 0;border-bottom:0.5px solid var(--c-border-light)}
.feature-item:last-child{border-bottom:none}
.feature-num{font-size:11px;color:var(--c-orange);letter-spacing:0.12em;font-weight:500;padding-top:4px;min-width:28px}
.feature-body h4{font-size:15px;font-weight:500;color:var(--c-navy);margin-bottom:4px;letter-spacing:-0.01em}
.feature-body p{font-size:13px;color:var(--c-text-muted);line-height:1.75;margin:0}

/* ==========================================================================
   WORKS / PROJECTS
   ========================================================================== */
.works-grid{display:grid;grid-template-columns:1fr;gap:0;margin-top:8px}
@media(min-width:700px){.works-grid{grid-template-columns:repeat(2,1fr)}}
.work-card{padding:32px 28px;border-bottom:0.5px solid var(--c-border-light);border-right:0.5px solid var(--c-border-light);transition:background .3s}
.work-card:hover{background:var(--c-bg-subtle)}
@media(min-width:700px){
  .work-card:nth-child(2n){border-right:none}
}
.work-cat{display:inline-block;font-size:10px;color:var(--c-navy);background:var(--c-navy-light);padding:4px 12px;border-radius:100px;letter-spacing:0.06em;font-weight:500;margin-bottom:16px}
.work-card h3{font-size:18px;margin-bottom:10px}
.work-card p{font-size:13px;line-height:1.75;margin-bottom:16px}
.work-tech{display:flex;gap:6px;flex-wrap:wrap;padding-top:12px;border-top:0.5px solid var(--c-border-light)}
.tech-tag{font-size:10px;color:var(--c-text-muted);letter-spacing:0.04em;padding:2px 8px;background:#fff;border:0.5px solid var(--c-border-light);border-radius:4px}

/* ==========================================================================
   CTA STRIP
   ========================================================================== */
.cta-strip{background:var(--c-navy);color:#fff;padding:64px 0}
.cta-strip .wrap{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-strip h2{color:#fff;margin:0;font-size:28px}
.cta-strip p{color:rgba(255,255,255,0.7);margin-top:8px;font-size:14px}
.cta-strip .btn-primary{background:var(--c-orange)}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer{background:#fafafa;border-top:0.5px solid var(--c-border);padding:64px 0 32px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:40px;margin-bottom:40px}
@media(min-width:700px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}}
.footer-brand p{font-size:13px;color:var(--c-text-light);margin-top:14px;max-width:280px;line-height:1.75}
.footer-col h5{font-size:11px;color:var(--c-text-light);letter-spacing:0.12em;text-transform:uppercase;margin-bottom:16px;font-weight:500}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:13px;color:var(--c-text)}
.footer-col address{font-size:13px;color:var(--c-text-muted);font-style:normal;line-height:1.8}
.footer-bottom{border-top:0.5px solid var(--c-border);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:12px;color:var(--c-text-light)}

/* ==========================================================================
   PAGE HEADER (subpages)
   ========================================================================== */
.page-header{padding:72px 0 48px;border-bottom:0.5px solid var(--c-border-light)}
.page-header .eyebrow{margin-bottom:14px}
.page-header h1{font-size:clamp(32px,4.5vw,44px);margin-bottom:16px}
.page-header p{max-width:640px;font-size:16px}

/* ==========================================================================
   ABOUT - Company info table
   ========================================================================== */
.info-table{width:100%;border-collapse:collapse;margin-top:24px}
.info-table tr{border-bottom:0.5px solid var(--c-border-light)}
.info-table tr:first-child{border-top:0.5px solid var(--c-border-light)}
.info-table th{font-weight:500;text-align:left;padding:18px 0;width:200px;font-size:13px;color:var(--c-text-muted);vertical-align:top}
.info-table td{padding:18px 0;font-size:14px;color:var(--c-text);vertical-align:top;line-height:1.75}
.info-table td ul{display:flex;flex-direction:column;gap:6px;padding-left:0}
.info-table td li{position:relative;padding-left:16px;font-size:14px}
.info-table td li::before{content:"·";position:absolute;left:4px;color:var(--c-orange);font-weight:700}

/* ==========================================================================
   MISSION / VISION cards
   ========================================================================== */
.mv-grid{display:grid;grid-template-columns:1fr;gap:24px;margin-top:32px}
@media(min-width:700px){.mv-grid{grid-template-columns:repeat(3,1fr)}}
.mv-card{padding:28px;border:0.5px solid var(--c-border);border-radius:10px;background:#fff}
.mv-card .mv-icon{width:36px;height:36px;margin-bottom:20px;color:var(--c-orange)}
.mv-card h3{font-size:16px;margin-bottom:10px}
.mv-card p{font-size:13.5px;line-height:1.8;margin:0}

/* ==========================================================================
   CONTACT FORM
   ========================================================================== */
.contact-grid{display:grid;grid-template-columns:1fr;gap:48px}
@media(min-width:900px){.contact-grid{grid-template-columns:1fr 1.2fr;gap:80px}}
.contact-info h3{font-size:16px;margin-bottom:8px}
.contact-info p{font-size:14px;margin-bottom:20px;line-height:1.8}
.contact-info .info-block{padding:16px 0;border-bottom:0.5px solid var(--c-border-light)}
.contact-info .info-block:first-of-type{border-top:0.5px solid var(--c-border-light)}
.contact-info .info-label{font-size:11px;color:var(--c-text-light);letter-spacing:0.08em;text-transform:uppercase;margin-bottom:4px}
.contact-info .info-val{font-size:14px;color:var(--c-text)}

.form{display:flex;flex-direction:column;gap:20px}
.form-row{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:600px){.form-row{grid-template-columns:1fr 1fr}}
.form-group{display:flex;flex-direction:column;gap:8px}
.form-group label{font-size:12px;color:var(--c-text);letter-spacing:0.04em;font-weight:500}
.form-group label .req{color:var(--c-orange);margin-left:2px}
.form-group input,.form-group textarea,.form-group select{font-family:inherit;font-size:14px;padding:12px 14px;border:0.5px solid var(--c-border);border-radius:6px;background:#fff;color:var(--c-text);transition:border-color .2s;width:100%}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--c-orange);box-shadow:0 0 0 3px rgba(238,152,38,0.12)}
.form-group textarea{resize:vertical;min-height:140px;line-height:1.6}
.form-submit{margin-top:8px}

/* ==========================================================================
   UTILITIES
   ========================================================================== */
.divider{height:0.5px;background:var(--c-border-light);border:none;margin:0}
.text-center{text-align:center}

/* Fade-in on load (graceful if JS disabled) */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
[data-reveal].in{opacity:1;transform:none}

/* Print */
@media print{.site-header,.site-footer,.cta-strip{display:none}}