/* ============================================================
   HVP Valve Intelligence Platform — Design System v4
   Enterprise medtech visual language
   ============================================================ */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;scroll-behavior:smooth}

:root{
  /* ── Backgrounds ── */
  --bg:   #ffffff;
  --bg1:  #f6f8fb;
  --bg2:  #e8edf3;
  --bg3:  #d6dee8;

  /* ── Borders ── */
  --border:  rgba(0,0,0,0.08);
  --border2: rgba(0,0,0,0.16);

  /* ── Text ── */
  --t1: #0f172a;
  --t2: #334155;
  --t3: #64748b;
  --t4: #94a3b8;

  /* ── Brand colors ── */
  --blue:       #1959c7;
  --blue-dim:   rgba(25,89,199,0.08);
  --blue-glow:  rgba(25,89,199,0.26);
  --blue-hover: #154eb1;

  --green:      #1d8348;
  --green-dim:  rgba(29,131,72,0.08);

  --orange:     #bf5900;
  --orange-dim: rgba(191,89,0,0.08);

  --red:        #c0392b;
  --red-dim:    rgba(192,57,43,0.08);

  --purple:     #6e3fc0;
  --purple-dim: rgba(110,63,192,0.08);

  --teal:       #0a7ea4;
  --teal-dim:   rgba(10,126,164,0.08);

  /* ── Typography ── */
  --font:'Avenir Next','Avenir','SF Pro Display','PingFang SC','Hiragino Sans GB','Microsoft YaHei',-apple-system,BlinkMacSystemFont,'Segoe UI','Helvetica Neue',sans-serif;
  --mono:'SF Mono','Fira Code','Roboto Mono',monospace;

  /* ── Layout ── */
  --nav-h: 64px;
  --max-w: 1080px;

  /* ── Radii ── */
  --r-sm: 8px; --r-md: 12px; --r-lg: 16px; --r-xl: 20px; --r-2xl: 28px; --r-full: 9999px;

  /* ── Transitions ── */
  --ease:   cubic-bezier(.25,.1,.25,1);
  --spring: cubic-bezier(.34,1.56,.64,1);
  --fast:   .15s; --base: .25s; --slow: .4s;

  /* ── Shadows ── */
  --shadow-sm: 0 2px 8px rgba(15,23,42,.06);
  --shadow-md: 0 8px 24px rgba(15,23,42,.10);
  --shadow-lg: 0 16px 42px rgba(15,23,42,.14);
  --shadow-xl: 0 24px 72px rgba(15,23,42,.18);

  /* ── Spacing ── */
  --space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;
  --space-6:24px;--space-7:28px;--space-8:32px;--space-9:36px;--space-10:40px;
  --space-12:48px;--space-14:56px;--space-16:64px;

  /* ── Compat aliases (old tokens) ── */
  --c-bg:var(--bg);--c-surface:var(--bg1);--c-surface-2:var(--bg2);--c-surface-3:var(--bg3);
  --c-border:var(--border);--c-border-2:var(--border2);
  --c-text-1:var(--t1);--c-text-2:var(--t2);--c-text-3:var(--t3);--c-text-4:var(--t4);
  --c-blue:var(--blue);--c-blue-dim:var(--blue-dim);
  --c-brand:var(--blue);--c-brand-light:#338de8;--c-brand-dim:var(--blue-dim);
  --c-teal:var(--teal);--c-teal-dim:var(--teal-dim);
  --c-violet:var(--purple);--c-violet-dim:var(--purple-dim);
  --c-success:var(--green);--c-success-dim:var(--green-dim);
  --c-warning:var(--orange);--c-warning-dim:var(--orange-dim);
  --c-danger:var(--red);--c-danger-dim:var(--red-dim);
  --font-sans:var(--font);--font-mono:var(--mono);
  --t-fast:var(--fast);--t-base:var(--base);--t-slow:var(--slow);
  --max-w-content:var(--max-w);
}

/* ── Reset ── */
body{
  font-family:var(--font);
  background:
    radial-gradient(1200px 600px at -10% -15%, rgba(25,89,199,.05), transparent 60%),
    radial-gradient(1000px 520px at 120% -20%, rgba(15,118,110,.05), transparent 60%),
    var(--bg);
  color:var(--t1);
  line-height:1.55;
  min-height:100vh;
  opacity:0;
  transition:opacity .34s ease,transform .34s ease;
}
body.hvp-page-ready{opacity:1}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
img,svg{display:block;max-width:100%}

/* ── Language Splash ── */
#lang-splash{
  position:fixed;inset:0;z-index:9999;
  background:#fff;
  display:flex;align-items:center;justify-content:center;flex-direction:column;
  transition:opacity .6s var(--ease);
}
#lang-splash.out{opacity:0;pointer-events:none}
.splash-brand{
  font-size:11px;font-weight:700;letter-spacing:2px;text-transform:uppercase;
  color:var(--t4);margin-bottom:52px;
}
.splash-brand em{color:var(--t3);font-style:normal}
.splash-title{
  font-size:clamp(28px,5vw,48px);font-weight:700;letter-spacing:-.03em;
  color:var(--t1);margin-bottom:10px;text-align:center;line-height:1.1;
}
.splash-sub{font-size:16px;color:var(--t3);margin-bottom:52px;text-align:center}
.splash-options{display:flex;gap:12px}
.splash-btn{
  padding:13px 40px;border-radius:var(--r-full);
  font-size:16px;font-weight:600;letter-spacing:-.01em;
  cursor:pointer;transition:all var(--base) var(--ease);
  border:1.5px solid var(--border2);background:transparent;color:var(--t1);
}
.splash-btn:hover{background:var(--bg1);transform:scale(1.02)}
.splash-btn.primary{
  background:var(--blue);border-color:var(--blue);color:#fff;
  box-shadow:0 4px 16px var(--blue-glow);
}
.splash-btn.primary:hover{background:var(--blue-hover);transform:scale(1.02)}

/* ── Navigation ── */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-h);
  background:#ffffff!important;
  opacity:1;
  isolation:isolate;
  backdrop-filter:none;
  -webkit-backdrop-filter:none;
  border-bottom:1px solid rgba(15,23,42,.08);
}
.nav-inner{
  max-width:var(--max-w);margin:0 auto;height:100%;
  display:flex;align-items:center;padding:0 24px;gap:20px;
  position:relative;z-index:1;
}
.nav-logo{
  display:flex;align-items:center;gap:7px;
  font-size:15px;font-weight:700;letter-spacing:-.02em;color:var(--t1);flex-shrink:0;
  background:#fff;
  border-radius:10px;
  padding:2px 6px;
  box-shadow:0 0 0 1px rgba(15,23,42,.05);
}
.nav-logo-heart,.nav-logo-icon{color:var(--red);font-size:16px}
.nav-logo picture{display:block}
.nav-logo-img{
  height:44px;width:auto;display:block;object-fit:contain;max-width:176px;
  mix-blend-mode:normal;filter:none!important;opacity:1;background:#fff;border-radius:4px;
}
.nav-links{
  display:flex;align-items:center;gap:0;flex:1;
  min-width:0;overflow-x:auto;overflow-y:hidden;scrollbar-width:none;
}
.nav-links::-webkit-scrollbar{display:none}
.nav-link{
  padding:8px 10px;border-radius:10px;
  font-size:11px;font-weight:700;letter-spacing:.02em;text-transform:uppercase;color:var(--t3);
  transition:all var(--fast) var(--ease);white-space:nowrap;
  flex:0 0 auto;
}
.nav-link:hover{color:var(--t1);background:var(--bg1)}
.nav-link.active{color:var(--blue);background:var(--blue-dim)}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.nav-team-cta{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:34px;padding:7px 11px;border-radius:999px;
  border:1px solid rgba(25,89,199,.28);background:#eef4ff;color:#154eb1;
  font-size:11px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;
  text-decoration:none;white-space:nowrap;transition:all var(--fast) var(--ease);
}
.nav-team-cta:hover{background:#dbe9ff;border-color:rgba(25,89,199,.4)}
.nav-team-cta.active{background:#1756c3;border-color:#1756c3;color:#fff}
.nav-lang-control{position:relative}
.nav-lang-current{
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 12px;
  border-radius:999px;
  border:1px solid rgba(15,23,42,.18);
  background:linear-gradient(180deg,#fff,#f5f8fd);
  color:#1e293b;
  font-size:12px;
  font-weight:700;
  letter-spacing:.04em;
  text-transform:uppercase;
  transition:all var(--fast) var(--ease);
}
.nav-lang-current:hover{border-color:rgba(25,89,199,.5);box-shadow:0 6px 18px rgba(25,89,199,.12)}
.nav-lang-menu{
  position:absolute;top:calc(100% + 8px);right:0;
  min-width:136px;
  border:1px solid rgba(15,23,42,.12);
  border-radius:12px;
  background:#fff;
  box-shadow:0 14px 34px rgba(15,23,42,.14);
  padding:6px;
  display:none;
  z-index:30;
}
.nav-lang-menu.open{display:block}
.nav-lang-btn{
  width:100%;
  text-align:left;
  padding:8px 10px;
  border-radius:8px;
  font-size:12px;
  font-weight:700;
  color:var(--t3);
  letter-spacing:.02em;
  background:transparent;
  border:none;
  transition:all var(--fast);
}
.nav-lang-btn:hover{background:#eef4ff;color:#0f172a}
.nav-lang-btn.active{background:#dbe9ff;color:#154eb1}
.nav-mobile-btn,.nav-mobile-toggle{
  display:none;background:none;border:none;color:var(--t3);padding:8px;cursor:pointer;
}

/* ── Page wrapper ── */
.page-wrap{padding-top:var(--nav-h);min-height:100vh}

/* ── Hero ── */
.hero{
  padding:88px 24px 72px;text-align:center;position:relative;overflow:hidden;
  background:linear-gradient(180deg,#f0f6ff 0%,#fff 100%);
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse 70% 50% at 50% -5%,rgba(0,113,227,.06) 0%,transparent 70%);
  pointer-events:none;
}
.hero-eyebrow{
  display:inline-block;font-size:12px;font-weight:600;
  letter-spacing:1.5px;text-transform:uppercase;color:var(--blue);margin-bottom:18px;
}
.hero-title{
  font-size:clamp(32px,5.5vw,60px);font-weight:800;letter-spacing:-.04em;
  line-height:1.05;color:var(--t1);margin-bottom:18px;
}
.hero-title span{color:var(--blue)}
.hero-desc{
  font-size:clamp(16px,2vw,18px);color:var(--t2);
  max-width:520px;margin:0 auto 36px;line-height:1.65;
}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ── Buttons ── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-full);
  font-size:14px;font-weight:700;letter-spacing:.01em;cursor:pointer;
  transition:all var(--base) var(--ease);border:none;letter-spacing:-.01em;white-space:nowrap;
  min-height:44px;
}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 2px 8px var(--blue-glow)}
.btn-primary:hover{background:var(--blue-hover);box-shadow:0 4px 16px var(--blue-glow);transform:translateY(-1px)}
.btn-secondary{background:var(--bg1);color:var(--t1);border:1.5px solid var(--border2)}
.btn-secondary:hover{background:var(--bg2);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--t2);border:1px solid var(--border)}
.btn-ghost:hover{color:var(--t1);background:var(--bg1)}
.btn-sm{padding:7px 16px;font-size:13px}
.btn-lg{padding:13px 26px;font-size:16px}
.btn-full{width:100%}

/* ── Tool Cards ── */
.tool-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:16px;
  max-width:var(--max-w);margin:0 auto;padding:0 24px 88px;
}
.tool-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-2xl);
  padding:28px 24px;text-decoration:none;display:flex;flex-direction:column;
  transition:all var(--base) var(--ease);box-shadow:var(--shadow-sm);
}
.tool-card:hover{border-color:rgba(25,89,199,.26);transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.tool-icon{width:48px;height:48px;border-radius:var(--r-md);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:18px}
.tool-tag{font-size:11px;font-weight:700;letter-spacing:1px;text-transform:uppercase;margin-bottom:8px}
.tool-title{font-size:19px;font-weight:700;letter-spacing:-.02em;color:var(--t1);margin-bottom:8px}
.tool-desc{font-size:14px;color:var(--t2);line-height:1.6;flex:1;margin-bottom:20px}
.tool-arrow{font-size:13px;font-weight:600;display:flex;align-items:center;gap:8px;transition:gap var(--fast)}
.tool-card:hover .tool-arrow{gap:12px}

/* ── Page Header ── */
.page-header{
  padding:56px 24px 36px;text-align:center;position:relative;
  background:linear-gradient(180deg,#f0f6ff 0%,#fff 100%);
  border-bottom:1px solid var(--border);
}
.page-header-inner{max-width:660px;margin:0 auto;position:relative}
.page-eyebrow{
  display:inline-block;font-size:12px;font-weight:600;
  letter-spacing:1.5px;text-transform:uppercase;margin-bottom:14px;
}
.page-title{
  font-size:clamp(26px,4vw,44px);font-weight:800;letter-spacing:-.04em;
  color:var(--t1);margin-bottom:12px;
}
.page-desc,.page-subtitle{font-size:16px;color:var(--t2);line-height:1.65;max-width:600px;margin:0 auto}

/* ── Two-col layout ── */
.two-col{
  display:grid;grid-template-columns:360px 1fr;gap:20px;align-items:start;
  max-width:var(--max-w);margin:0 auto;padding:0 24px 80px;
}
.main-layout{max-width:var(--max-w);margin:0 auto;padding:var(--space-8) var(--space-6) var(--space-16)}

/* ── Input Panel ── */
.input-panel{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-2xl);
  overflow:hidden;position:sticky;top:calc(var(--nav-h)+16px);
  box-shadow:var(--shadow-sm);
}
.input-panel-head,.panel-head{
  padding:18px 22px;border-bottom:1px solid var(--border);
  display:flex;align-items:center;gap:10px;background:var(--bg1);
}
.input-panel-body,.panel-body{padding:20px 22px}
.input-section-label,.sec-label{
  font-size:11px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;
  color:var(--t4);margin:18px 0 10px;
}
.input-section-label:first-child,.sec-label:first-child{margin-top:0}

/* ── Slider ── */
.slider-row{margin-bottom:16px}
.slider-row-head,.slider-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:7px}
.slider-row-label,.slider-label{font-size:13px;font-weight:500;color:var(--t2)}
.slider-row-val,.slider-val{
  font-size:13px;font-weight:700;font-family:var(--mono);color:var(--t1);
  background:#fff;padding:2px 10px;border-radius:var(--r-full);
  border:1px solid var(--border);box-shadow:var(--shadow-sm);
}
input[type=range],.slider-track{
  -webkit-appearance:none;appearance:none;width:100%;height:3px;
  background:var(--bg2);border-radius:var(--r-full);outline:none;cursor:pointer;
}
input[type=range]::-webkit-slider-thumb,.slider-track::-webkit-slider-thumb{
  -webkit-appearance:none;width:18px;height:18px;border-radius:50%;
  background:#fff;border:2px solid var(--border2);
  box-shadow:0 1px 4px rgba(0,0,0,.15);transition:transform var(--fast);
}
input[type=range]::-webkit-slider-thumb:hover,.slider-track::-webkit-slider-thumb:hover{transform:scale(1.2)}
input[type=range]::-moz-range-thumb,.slider-track::-moz-range-thumb{
  width:18px;height:18px;border-radius:50%;border:2px solid var(--border2);background:#fff;
}

/* ── Radio pills ── */
.radio-group{display:flex;gap:8px;flex-wrap:wrap}
.radio-pill{
  padding:6px 14px;
  background:var(--bg1);border:1.5px solid var(--border);
  border-radius:var(--r-full);font-size:13px;font-weight:500;color:var(--t2);
  cursor:pointer;transition:all var(--fast);user-select:none;
}
.radio-pill:hover{border-color:var(--border2);color:var(--t1)}
.radio-pill.selected{background:var(--blue-dim);border-color:var(--blue);color:var(--blue);font-weight:600}

/* ── Segmented control ── */
.seg{display:flex;background:var(--bg1);border:1px solid var(--border);border-radius:var(--r-sm);padding:3px;gap:2px}
.seg-opt{
  flex:1;padding:6px 8px;border-radius:6px;font-size:13px;font-weight:500;
  color:var(--t3);cursor:pointer;text-align:center;transition:all var(--fast);user-select:none;
}
.seg-opt:hover{color:var(--t2)}
.seg-opt.on{background:#fff;color:var(--t1);box-shadow:var(--shadow-sm)}

/* ── Form ── */
.form-group{margin-bottom:18px}
.form-label{font-size:13px;font-weight:500;color:var(--t2);margin-bottom:8px;display:block}

/* ── Cards ── */
.card,.chart-card,.risk-summary,.model-info{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-2xl);
  overflow:hidden;box-shadow:var(--shadow-sm);
}
.card-head,.chart-card-head,.risk-summary-head,.input-panel-head{
  padding:16px 22px;border-bottom:1px solid var(--border);
  display:flex;align-items:center;gap:10px;background:var(--bg1);
}
.card-title,.chart-card-title,.risk-summary-title{font-size:14px;font-weight:700;color:var(--t1)}
.card-body,.chart-card-body,.risk-summary-body,.model-info{padding:22px}

/* ── Placeholder ── */
.placeholder,.placeholder-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:72px 24px;text-align:center;
}
.placeholder-icon{font-size:40px;margin-bottom:16px;opacity:.2}
.placeholder-text{font-size:14px;color:var(--t3);line-height:1.6;max-width:260px}

/* ── Risk groups ── */
.risk-group-display{
  display:flex;align-items:center;gap:12px;padding:16px;border-radius:var(--r-lg);margin-bottom:16px;
}
.risk-group-icon{font-size:24px}
.risk-group-name{font-size:18px;font-weight:800}
.risk-group-pts{font-size:13px;color:var(--t3)}
.risk-low {background:var(--green-dim);border:1px solid rgba(29,131,72,.15)}
.risk-int {background:var(--orange-dim);border:1px solid rgba(191,89,0,.15)}
.risk-high{background:var(--red-dim);border:1px solid rgba(192,57,43,.15)}

/* ── Survival grid ── */
.surv-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.surv-col-head{
  font-size:11px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;
  color:var(--t3);margin-bottom:10px;padding-bottom:8px;border-bottom:1px solid var(--border);
}
.surv-row{
  display:flex;align-items:center;justify-content:space-between;
  padding:8px 0;border-bottom:1px solid var(--border);
}
.surv-row:last-child{border-bottom:none}
.surv-year{font-size:13px;color:var(--t3)}
.surv-val{font-size:18px;font-weight:800;font-family:var(--mono)}
.surv-bar{height:4px;background:var(--bg2);border-radius:var(--r-full);margin-top:4px;overflow:hidden}
.surv-bar-fill{height:100%;border-radius:var(--r-full);transition:width .8s var(--ease)}

/* ── Factor bars ── */
.factor-bar-row{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.factor-bar-label{font-size:12px;font-weight:600;color:var(--t2);width:70px;flex-shrink:0}
.factor-bar-track{flex:1;height:6px;background:var(--bg2);border-radius:var(--r-full);overflow:hidden}
.factor-bar-fill{height:100%;border-radius:var(--r-full);transition:width .8s var(--ease)}
.factor-bar-pct{font-size:11px;font-weight:700;font-family:var(--mono);color:var(--t3);width:40px;text-align:right}
.factor-pts{font-size:11px;font-family:var(--mono);color:var(--t4);width:52px;text-align:right}

/* ── Model info rows ── */
.model-info-row{display:flex;align-items:center;justify-content:space-between;padding:7px 0;border-bottom:1px solid var(--border)}
.model-info-row:last-child{border-bottom:none}
.model-info-key{font-size:12px;color:var(--t3)}
.model-info-val{font-size:12px;font-weight:600;font-family:var(--mono);color:var(--t2)}

/* ── Domain tabs ── */
.domain-tabs{
  display:flex;gap:6px;background:var(--bg1);border:1px solid var(--border);
  border-radius:var(--r-lg);padding:6px;max-width:var(--max-w);margin:0 auto 20px;
}
.domain-tab{
  flex:1;padding:9px 14px;border-radius:var(--r-md);font-size:14px;font-weight:600;
  color:var(--t3);cursor:pointer;text-align:center;transition:all var(--fast);background:none;border:none;
}
.domain-tab:hover{color:var(--t2);background:var(--bg2)}
.domain-tab.active{background:#fff;color:var(--t1);box-shadow:var(--shadow-sm)}

/* ── Class badges ── */
.class-badge{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--r-md);font-size:13px;font-weight:800;flex-shrink:0;
}
.class-I  {background:var(--green-dim);color:var(--green);border:1px solid rgba(29,131,72,.2)}
.class-IIa{background:var(--blue-dim);color:var(--blue);border:1px solid rgba(0,113,227,.2)}
.class-IIb{background:var(--orange-dim);color:var(--orange);border:1px solid rgba(191,89,0,.2)}
.class-III{background:var(--red-dim);color:var(--red);border:1px solid rgba(192,57,43,.2)}
.level-badge{
  display:inline-flex;align-items:center;justify-content:center;
  width:28px;height:28px;border-radius:var(--r-sm);font-size:12px;font-weight:800;
  background:var(--bg2);color:var(--t2);border:1px solid var(--border);flex-shrink:0;
}

/* ── Badges ── */
.badge{
  display:inline-flex;align-items:center;gap:4px;padding:3px 10px;
  font-size:11px;font-weight:700;letter-spacing:.5px;border-radius:var(--r-full);text-transform:uppercase;
}
.badge-brand,.badge-blue{background:var(--blue-dim);color:var(--blue)}
.badge-teal,.badge-success{background:var(--green-dim);color:var(--green)}
.badge-violet{background:var(--purple-dim);color:var(--purple)}
.badge-warning{background:var(--orange-dim);color:var(--orange)}
.badge-danger{background:var(--red-dim);color:var(--red)}
.badge-neutral{background:var(--bg2);color:var(--t2)}

/* ── Section tag ── */
.section-tag{
  display:inline-block;font-size:12px;font-weight:600;
  letter-spacing:1.5px;text-transform:uppercase;
  padding:5px 14px;border-radius:var(--r-full);
  background:var(--blue-dim);border:1px solid rgba(0,113,227,.2);color:var(--blue);
  margin-bottom:14px;
}

/* ── Source chip ── */
.source-chip{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;
  background:var(--bg1);border:1px solid var(--border);border-radius:var(--r-full);
  font-size:11px;font-weight:600;color:var(--t3);text-decoration:none;transition:all var(--fast);
}
.source-chip:hover{border-color:var(--blue);color:var(--blue)}

/* ── Opt cards (HOME) ── */
.opt-card{
  display:flex;align-items:center;gap:12px;padding:13px 15px;
  background:#fff;border:1.5px solid var(--border);border-radius:var(--r-md);
  cursor:pointer;transition:all var(--fast);user-select:none;margin-bottom:8px;
  box-shadow:var(--shadow-sm);
}
.opt-card:hover{border-color:var(--border2);background:var(--bg1)}
.opt-card.on{border-color:var(--blue);background:var(--blue-dim)}
.opt-radio{
  width:18px;height:18px;flex-shrink:0;border:2px solid var(--border2);border-radius:50%;
  display:flex;align-items:center;justify-content:center;transition:all var(--fast);
}
.opt-card.on .opt-radio{border-color:var(--blue);background:var(--blue)}
.opt-radio::after{
  content:'';width:7px;height:7px;background:#fff;border-radius:50%;
  opacity:0;transform:scale(0);transition:all var(--fast);
}
.opt-card.on .opt-radio::after{opacity:1;transform:scale(1)}
.opt-body{flex:1}
.opt-name{font-size:14px;font-weight:500;color:var(--t1)}
.opt-hint{font-size:12px;color:var(--t3);margin-top:2px}
.opt-pts{
  font-size:12px;font-weight:700;font-family:var(--mono);
  padding:3px 10px;background:var(--bg2);border-radius:var(--r-full);color:var(--t3);transition:all var(--fast);
}
.opt-card.on .opt-pts{background:var(--blue);color:#fff}

/* ── Divider ── */
.divider{height:1px;background:var(--border);margin:20px 0}

/* ── Footer ── */
.footer{border-top:1px solid var(--border);padding:36px 24px;text-align:center;background:var(--bg1)}
.footer-inner{max-width:680px;margin:0 auto}
.footer-disc{font-size:12px;color:var(--t4);line-height:1.7}

/* ── Text helpers ── */
.text-brand{color:var(--blue)}
.text-teal{color:var(--teal)}
.text-violet{color:var(--purple)}

/* ── Animations ── */
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes anim-fade-up-kf{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.anim{animation:fadeUp .45s var(--ease) both}
.anim-fade-up{animation:anim-fade-up-kf .45s var(--ease) both}
.d1{animation-delay:.05s}.d2{animation-delay:.1s}.d3{animation-delay:.15s}.d4{animation-delay:.2s}

/* ── Scrollbar ── */
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:rgba(0,0,0,.12);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:rgba(0,0,0,.2)}

/* ── Responsive ── */
@media(max-width:860px){
  :root{--nav-h:58px}
  .tool-grid{grid-template-columns:1fr}
  .two-col{grid-template-columns:1fr}
  .input-panel{position:static}
  .nav-inner{padding:0 14px;gap:10px}
  .nav-logo-img{height:34px;max-width:140px}
  .nav-links{display:none}
  .nav-links.open{
    display:flex;flex-direction:column;position:fixed;top:var(--nav-h);left:0;right:0;
    background:#ffffff;backdrop-filter:none;
    padding:14px 14px;border-bottom:1px solid var(--border);gap:6px;
    box-shadow:var(--shadow-md);
  }
  .nav-link{padding:12px 14px;font-size:13px}
  .nav-lang-current{padding:7px 10px;min-height:38px}
  .nav-team-cta{min-height:36px;padding:7px 10px}
  .nav-lang-menu{right:0;left:auto}
  .nav-mobile-btn,.nav-mobile-toggle{display:flex!important}
  .domain-tabs{margin:0 24px 20px}
  .surv-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
  .main-layout{padding-left:14px!important;padding-right:14px!important}
  .page-header{padding-left:14px!important;padding-right:14px!important}
  .splash-options{flex-direction:column;width:100%;padding:0 24px}
  .splash-btn{text-align:center}
  .hero-actions{flex-direction:column;align-items:center}
  .btn{width:100%}
}
/* ── Enterprise reveal and page transition ── */
.hvp-reveal{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
.hvp-reveal.in{
  opacity:1;
  transform:translateY(0);
}
body.hvp-leaving{
  opacity:0;
  transform:translateY(8px);
}
.hvp-transition-layer{
  position:fixed;
  inset:0;
  z-index:9999;
  pointer-events:none;
  opacity:0;
  transform:translateY(16px);
  background:
    radial-gradient(900px 340px at 90% -20%, rgba(138,180,255,.25), transparent 68%),
    linear-gradient(135deg, #081327 0%, #112d56 52%, #1c4b87 100%);
  transition:opacity .32s ease,transform .32s ease;
}
.hvp-transition-layer.show{
  opacity:1;
  transform:translateY(0);
}