/* ==========================================================================
   7S Data Centers & AIOps Management Services — Website Wireframe
   Design tokens: White/Grey backgrounds, Black/Red typography
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  --bg:            #ffffff;
  --bg-grey:       #f4f4f5;
  --bg-grey-dark:  #e7e7ea;
  --panel:         #fbfbfc;
  --ink:           #111111;
  --ink-soft:      #4b4b4f;
  --ink-faint:     #8a8a8f;
  --border:        #dcdce0;
  --border-strong: #b9b9c0;
  --red:           #c81e1e;
  --red-dark:      #8c1414;
  --red-soft:      #f4dcdc;
  --deep:          #e9e9eb;
  --deep-line:     #cfd0d4;
  --deep-line-soft:#d8d9dc;
  --deep-text:     #161616;
  --deep-text-soft:#5a5a5d;

  --display: 'Space Grotesk', 'Arial Narrow', sans-serif;
  --body: 'Inter', -apple-system, sans-serif;
  --mono: 'IBM Plex Mono', monospace;

  --maxw: 1240px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{
  font-family:var(--display);
  font-weight:600;
  letter-spacing:-0.01em;
  margin:0 0 .5em;
  color:var(--ink);
}
p{margin:0 0 1em;color:var(--ink-soft);}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px;}
section{padding:88px 0;}
.section-grey{background:var(--bg-grey);}
.eyebrow{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--red);
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--red);display:inline-block;}
.h-xl{font-size:clamp(34px,5vw,58px);line-height:1.04;}
.h-lg{font-size:clamp(28px,3.6vw,40px);line-height:1.1;}
.h-md{font-size:24px;}
.lede{font-size:19px;color:var(--ink-soft);max-width:640px;}
.red{color:var(--red);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--body);font-weight:600;font-size:14px;
  padding:14px 26px;border-radius:2px;
  border:1px solid transparent;cursor:pointer;
  transition:all .15s ease;
}
.btn-primary{background:var(--red);color:#fff;}
.btn-primary:hover{background:var(--red-dark);}
.btn-outline{border-color:var(--ink);color:var(--ink);background:transparent;}
.btn-outline:hover{border-color:var(--red);color:var(--red);}
.btn-ghost{color:var(--red);font-weight:600;}
.btn-ghost:after{content:"→";margin-left:6px;transition:margin .15s ease;}
.btn-ghost:hover:after{margin-left:10px;}

/* ---------- Header / Nav ---------- */
header.site{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border);
}
.nav-row{display:flex;align-items:center;justify-content:space-between;padding:10px 32px;max-width:var(--maxw);margin:0 auto;}
.logo{font-family:var(--display);font-weight:700;font-size:19px;letter-spacing:-.01em;display:flex;align-items:center;gap:10px;}
.logo .mark{width:11px;height:11px;background:var(--red);display:inline-block;transform:rotate(45deg);}
.logo small{display:block;font-family:var(--mono);font-weight:400;font-size:10px;letter-spacing:.08em;color:var(--ink-faint);text-transform:uppercase;}
.logo .logo-img{height:150px;width:auto;display:block;}
.footer-grid .logo .logo-img{height:150px;}
@media (max-width:900px){.logo .logo-img{height:110px;}}
@media (max-width:600px){.logo .logo-img{height:84px;}}
nav.primary{display:flex;gap:28px;font-size:14px;font-weight:500;}
nav.primary a{color:var(--ink-soft);padding:6px 0;border-bottom:2px solid transparent;}
nav.primary a:hover,nav.primary a.active{color:var(--ink);border-bottom-color:var(--red);}
.nav-cta{display:flex;align-items:center;gap:18px;}
.nav-toggle{display:none;}

@media (max-width:980px){
  nav.primary{position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;gap:0;padding:8px 32px 20px;border-bottom:1px solid var(--border);display:none;}
  nav.primary.open{display:flex;}
  nav.primary a{padding:12px 0;border-bottom:1px solid var(--border);width:100%;}
  .nav-toggle{display:block;background:none;border:1px solid var(--ink);padding:8px 12px;font-family:var(--mono);font-size:12px;}
  .nav-cta .btn-outline{display:none;}
}

/* ---------- Hero ---------- */
.hero{
  padding:76px 0 60px;position:relative;overflow:hidden;
  background:
    radial-gradient(600px 300px at 88% -10%, rgba(200,30,30,.06), transparent 60%),
    linear-gradient(180deg,#ffffff 0%, var(--bg-grey) 100%);
  border-bottom:1px solid var(--border);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(var(--border) 1px, transparent 1px),linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(180deg, rgba(0,0,0,.35), transparent 75%);
  -webkit-mask-image:linear-gradient(180deg, rgba(0,0,0,.35), transparent 75%);
}
.hero .wrap{position:relative;}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:start;}
.hero-tag{font-family:var(--mono);font-size:12px;color:var(--ink-faint);letter-spacing:.08em;text-transform:uppercase;margin-bottom:18px;}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap;}

/* ---------- Command strip (signature element) ---------- */
.command-panel{
  background:var(--deep);color:var(--deep-text);border-radius:2px;
  padding:22px 22px 6px;font-family:var(--mono);
  border-top:3px solid var(--red);
}
.command-panel .cp-head{display:flex;justify-content:space-between;align-items:center;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--deep-text-soft);margin-bottom:16px;}
.cp-dot{width:7px;height:7px;border-radius:50%;background:var(--red);display:inline-block;margin-right:6px;animation:pulse 1.8s infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.35;}}
.cp-metrics{display:grid;grid-template-columns:1fr 1fr;gap:0;}
.cp-metric{padding:16px 0;border-top:1px solid var(--deep-line);}
.cp-metric:nth-child(odd){padding-right:14px;}
.cp-metric:nth-child(even){padding-left:14px;border-left:1px solid var(--deep-line);}
.cp-val{font-size:26px;font-weight:700;color:var(--deep-text);}
.cp-val .unit{font-size:14px;color:var(--red-dark);margin-left:3px;}
.cp-label{font-size:10px;color:var(--deep-text-soft);letter-spacing:.08em;text-transform:uppercase;margin-top:4px;}
.cp-foot{border-top:1px solid var(--deep-line);margin-top:4px;padding:12px 0 14px;font-size:11px;color:var(--deep-text-soft);display:flex;justify-content:space-between;}
.cp-foot .red{color:var(--red-dark);font-weight:600;}

/* ---------- Stat bar ---------- */
.stat-bar{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.stat{padding:28px 32px;border-left:1px solid var(--border);}
.stat:first-child{border-left:none;}
.stat .num{font-family:var(--mono);font-size:30px;color:var(--red);font-weight:600;}
.stat .lbl{font-size:12.5px;color:var(--ink-soft);margin-top:4px;}
@media (max-width:900px){.stat-bar{grid-template-columns:1fr 1fr;}.stat:nth-child(3){border-left:none;}}

/* ---------- Cards / grids ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border);}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--border);border:1px solid var(--border);}
.card{background:#fff;padding:32px;}
.card h3{font-size:18px;}
.card .num-tag{font-family:var(--mono);color:var(--red);font-size:13px;margin-bottom:10px;display:block;}

.service-card{background:#fff;padding:30px;border-top:3px solid transparent;transition:border-color .18s ease, transform .18s ease, box-shadow .18s ease;}
.service-card:hover{border-top-color:var(--red);transform:translateY(-3px);box-shadow:0 16px 32px -20px rgba(17,17,17,.35);}
.card{transition:transform .18s ease, box-shadow .18s ease;}
.card:hover{transform:translateY(-3px);box-shadow:0 16px 32px -20px rgba(17,17,17,.3);}
.pill{transition:all .15s ease;}
.pill:hover{border-color:var(--red);color:var(--red);transform:translateY(-2px);}
.service-card .sv-index{font-family:var(--mono);font-size:12px;color:var(--red);}
.service-card h3{font-size:17px;margin:8px 0 10px;}
.service-card p{font-size:14px;margin-bottom:14px;}
.service-card a{font-size:13px;font-weight:600;color:var(--red);}

/* ---------- Section header row ---------- */
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:44px;flex-wrap:wrap;}

/* ---------- Process steps ---------- */
.process{display:flex;gap:0;overflow-x:auto;border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.pstep{flex:1 0 190px;padding:26px 22px;border-left:1px solid var(--border);}
.pstep:first-child{border-left:none;}
.pstep .pn{font-family:var(--mono);color:var(--red);font-size:22px;font-weight:600;}
.pstep h4{font-size:15px;margin:10px 0 6px;}
.pstep p{font-size:13px;margin:0;}

/* ---------- KPI table ---------- */
.kpi-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--border);}
.kpi-list li{padding:14px 18px;border-bottom:1px solid var(--border);font-size:14px;display:flex;align-items:center;gap:10px;}
.kpi-list li:nth-child(odd){border-right:1px solid var(--border);}
.kpi-list li::before{content:"●";color:var(--red);font-size:9px;}

/* ---------- Feature panel (replaces wireframe placeholder blocks) ---------- */
.feature-panel{
  background:var(--deep);color:var(--deep-text);border-radius:2px;padding:34px;
  border-top:3px solid var(--red);
}
.feature-panel h3{color:var(--deep-text);}
.feature-panel p{color:var(--deep-text-soft);}
.feature-panel .tag{border-color:var(--deep-line);color:var(--deep-text);background:transparent;}
.feature-panel-tag{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--red-dark);margin-bottom:14px;font-weight:600;}

/* ---------- ADCOS loop diagram (home signature element) ---------- */
.loop-card{background:var(--deep);color:var(--deep-text);border-radius:2px;padding:28px;border-top:3px solid var(--red);}
.loop-card-head{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--deep-text-soft);margin-bottom:8px;display:flex;align-items:center;gap:8px;}
.loop-svg{width:100%;height:auto;margin:6px 0 10px;}
.loop-ring{fill:none;stroke:var(--deep-line);stroke-width:1.5;stroke-dasharray:3 5;}
.loop-node circle{fill:var(--deep);stroke:var(--red);stroke-width:2;}
.loop-node text{fill:var(--deep-text);font-family:var(--mono);font-size:12px;text-anchor:middle;font-weight:700;}
.loop-center-a{fill:var(--deep-text);font-family:var(--display);font-size:15px;font-weight:700;text-anchor:middle;}
.loop-center-b{fill:var(--red-dark);font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-anchor:middle;}
.loop-legend{list-style:none;margin:0;padding:0;border-top:1px solid var(--deep-line);}
.loop-legend li{font-size:12.5px;color:var(--deep-text-soft);padding:9px 0;border-bottom:1px solid var(--deep-line);}
.loop-legend b{color:var(--deep-text);font-weight:700;}

/* ---------- World map (about page signature element) ---------- */
.map-panel{background:var(--deep);border-radius:2px;padding:24px;border-top:3px solid var(--red);}
.map-svg{width:100%;height:auto;}
.map-dots circle{fill:var(--deep-line);}
.map-marker circle:last-child{fill:var(--red-dark);}
.map-marker .ping{fill:var(--red);opacity:.3;animation:ping 2.2s infinite;}
@keyframes ping{0%{r:4;opacity:.4;}100%{r:14;opacity:0;}}
.map-legend{font-family:var(--mono);font-size:11px;color:var(--deep-text-soft);margin-top:14px;display:flex;align-items:center;gap:8px;}
.map-legend .cp-dot{background:var(--red-dark);}

/* ---------- Logo / partner strip ---------- */
.strip{display:flex;flex-wrap:wrap;gap:12px;}
.pill{border:1px solid var(--border-strong);padding:9px 16px;font-size:13px;font-family:var(--mono);color:var(--ink-soft);}

/* ---------- CTA band ---------- */
.cta-band{background:var(--deep);color:var(--deep-text);padding:76px 0;border-top:3px solid var(--red);}
.cta-band h2{color:var(--deep-text);}
.cta-band p{color:var(--deep-text-soft);}
.cta-band .btn-outline{border-color:var(--deep-text);color:var(--deep-text);}
.cta-band .btn-outline:hover{border-color:var(--red-dark);color:var(--red-dark);}

/* ---------- Footer ---------- */
footer.site{background:var(--bg-grey);border-top:1px solid var(--border);padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1fr;gap:32px;margin-bottom:48px;}
.footer-grid h5{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:14px;}
.footer-grid a{display:block;font-size:14px;color:var(--ink-soft);margin-bottom:10px;}
.footer-grid a:hover{color:var(--red);}
.footer-bottom{border-top:1px solid var(--border);padding-top:22px;display:flex;justify-content:space-between;font-size:12.5px;color:var(--ink-faint);flex-wrap:wrap;gap:10px;}
@media (max-width:900px){.footer-grid{grid-template-columns:1fr 1fr;}}

/* ---------- Scroll reveal ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease, transform .5s ease;}
.reveal-in{opacity:1;transform:translateY(0);}
@media (prefers-reduced-motion: reduce){.reveal{opacity:1;transform:none;}}

/* ==========================================================================
   Responsive — tablet & mobile
   ========================================================================== */

/* Tablet (≤980px) */
@media (max-width:980px){
  section{padding:64px 0;}
  .wrap{padding:0 24px;}
  .nav-row{padding:14px 20px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .command-panel{max-width:520px;}
}

/* Small tablet / large phone (≤768px) */
@media (max-width:768px){
  section{padding:52px 0;}
  .h-xl{font-size:clamp(30px,8vw,42px);}
  .h-lg{font-size:clamp(24px,6vw,32px);}
  .lede{font-size:17px;}
  .hero{padding:56px 0 44px;}
  .hero-actions{gap:10px;}
  .hero-actions .btn{flex:1 1 auto;justify-content:center;}
  .stat{padding:22px 20px;}
  .stat .num{font-size:24px;}
  .process{overflow-x:auto;-webkit-overflow-scrolling:touch;}
  .pstep{flex:1 0 78%;}
  .kpi-list li{font-size:13.5px;padding:12px 14px;}
  .cta-band .wrap{flex-direction:column;align-items:flex-start !important;}
  .cta-band .hero-actions{width:100%;}
  .cta-band .btn{width:100%;justify-content:center;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px;}
  .command-panel{padding:18px 18px 4px;}
  .cp-val{font-size:22px;}
  .loop-svg{max-width:320px;margin-left:auto;margin-right:auto;display:block;}
}

/* Phone (≤600px) */
@media (max-width:600px){
  body{font-size:15px;}
  .wrap{padding:0 18px;}
  .nav-row{padding:12px 16px;}
  .logo{font-size:16px;}
  .logo small{font-size:9px;}
  section{padding:44px 0;}
  .eyebrow{font-size:11px;}
  .h-xl{font-size:28px;}
  .h-lg{font-size:23px;}
  .h-md{font-size:20px;}
  .lede{font-size:16px;}
  .btn{padding:13px 20px;font-size:13.5px;width:100%;justify-content:center;}
  .hero-actions{flex-direction:column;}
  .stat-bar{grid-template-columns:1fr 1fr;}
  .stat{padding:18px 16px;border-bottom:1px solid var(--border);}
  .stat:nth-child(3){border-left:none;}
  .stat:nth-child(2n+1){border-left:none;}
  .cp-metrics{grid-template-columns:1fr;}
  .cp-metric:nth-child(even){padding-left:0;border-left:none;}
  .cp-metric:nth-child(odd){padding-right:0;}
  .cp-val{font-size:24px;}
  .command-panel .cp-head{flex-direction:column;align-items:flex-start;gap:4px;}
  .cp-foot{flex-direction:column;align-items:flex-start;gap:6px;}
  .feature-panel{padding:24px;}
  .loop-card{padding:20px;}
  .map-panel{padding:16px;}
  .process{flex-direction:column;}
  .pstep{flex:1 1 auto;border-left:none;border-top:1px solid var(--border);padding:20px 4px;}
  .pstep:first-child{border-top:none;}
  .card,.service-card{padding:24px 20px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .strip{gap:8px;}
  .pill{font-size:12px;padding:8px 12px;}
  nav.primary{padding:8px 16px 16px;}
}

/* Extra small phone (≤380px) */
@media (max-width:380px){
  .h-xl{font-size:25px;}
  .command-panel{padding:16px 14px 4px;}
  .cp-val{font-size:21px;}
}
.mt-0{margin-top:0;}
.divider{height:1px;background:var(--border);margin:56px 0;}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px;}
.tag{font-family:var(--mono);font-size:11px;border:1px solid var(--border-strong);padding:4px 10px;color:var(--ink-soft);}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:60px;}
@media (max-width:900px){.two-col,.hero-grid{grid-template-columns:1fr;}.grid-3{grid-template-columns:1fr 1fr;}}
@media (max-width:600px){.grid-3,.grid-2{grid-template-columns:1fr;}.kpi-list{grid-template-columns:1fr;}.kpi-list li:nth-child(odd){border-right:none;}}