/* ===========================================================
   Vesalor — design tokens
   =========================================================== */
:root{
  --bg-void:      #0A0A0B;
  --bg-raised:    #131316;
  --bg-raised-2:  #1A1A1E;
  --line:         #232327;
  --line-soft:    #1C1C20;

  --ink:          #F3F1EC;
  --ink-muted:    #97979F;
  --ink-faint:    #5C5C63;

  --signal:       #5B6EF5;
  --signal-dim:   #3A3F87;
  --teal:         #35D6C4;

  --radius-sm: 4px;
  --radius-md: 10px;

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Space Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;

  --wrap: 1180px;
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *,*::before,*::after{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body{
  margin:0;
  background: var(--bg-void);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1,h2,h3{
  font-family: var(--font-display);
  font-weight: 480;
  line-height: 1.08;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

p{ margin: 0 0 1em; color: var(--ink-muted); max-width: 62ch; }

a{ color: inherit; }

.wrap{
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 28px;
}

.skip-link{
  position:absolute; left:-9999px; top:0;
  background: var(--signal); color:#08080a; padding: 10px 16px; z-index: 999;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus{ left:0; }

:focus-visible{
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

/* ===========================================================
   Header / Nav
   =========================================================== */
.site-header{
  position: sticky; top:0; z-index: 100;
  background: rgba(10,10,11,0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  height: 68px;
}
.logo{
  font-family: var(--font-display);
  font-size: 1.35rem;
  text-decoration:none;
  letter-spacing: 0.01em;
}
.primary-nav{
  display:flex; gap: 30px;
}
.primary-nav a{
  text-decoration:none;
  font-size: 0.92rem;
  color: var(--ink-muted);
  position: relative;
  padding: 6px 0;
  transition: color 0.15s ease;
}
.primary-nav a:hover{ color: var(--ink); }
.primary-nav a.active{ color: var(--ink); }
.primary-nav a.active::after{
  content:"";
  position:absolute; left:0; right:0; bottom:-2px;
  height:1px; background: var(--signal);
}
.header-actions{ display:flex; align-items:center; gap: 16px; }
.nav-toggle{
  display:none; flex-direction:column; justify-content:center; gap:5px;
  width:36px; height:36px; background:none; border:none; cursor:pointer;
}
.nav-toggle span{ display:block; height:1px; background: var(--ink); width: 100%; }

/* ===========================================================
   Buttons
   =========================================================== */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 500;
  text-decoration:none;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor:pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.1s ease;
}
.btn:active{ transform: translateY(1px); }
.btn-primary{ background: var(--ink); color: var(--bg-void); }
.btn-primary:hover{ background: var(--signal); color: var(--ink); }
.btn-ghost{ border-color: var(--line); color: var(--ink); }
.btn-ghost:hover{ border-color: var(--ink-muted); }
.btn-text{ padding: 12px 0; color: var(--ink-muted); }
.btn-text:hover{ color: var(--ink); }
.btn-full{ width:100%; justify-content:center; }

/* ===========================================================
   Section rhythm
   =========================================================== */
.section{ padding: 128px 0; border-bottom: 1px solid var(--line-soft); }
.section:last-of-type{ border-bottom:none; }

.kicker{
  font-size: 0.82rem;
  color: var(--signal);
  letter-spacing: 0.01em;
  margin-bottom: 18px;
}
.section-head{ max-width: 760px; margin-bottom: 56px; }
.section-head h2{ font-size: clamp(1.9rem, 3vw, 2.6rem); }
.section-lede{ font-size: 1.05rem; }

/* ===========================================================
   Hero
   =========================================================== */
.hero{ padding-top: 96px; border-bottom: 1px solid var(--line-soft); }
.hero-grid{
  display:grid; grid-template-columns: 1.15fr 0.85fr; gap: 64px; align-items:center;
}
.hero-copy h1{
  font-size: clamp(2.4rem, 4.6vw, 3.85rem);
  max-width: 15ch;
}
.hero-lede{ font-size: 1.12rem; max-width: 46ch; }
.hero-ctas{ display:flex; align-items:center; gap: 28px; margin: 34px 0 44px; }
.hero-values{
  display:flex; gap: 28px; flex-wrap:wrap;
  padding-top: 28px; border-top: 1px solid var(--line-soft);
}
.hero-values div{ font-size: 0.86rem; color: var(--ink-faint); }
.hero-values span::before{ content:"— "; color: var(--signal); }

.hero-visual{ position:relative; }
.signal-graphic{ width:100%; height:auto; display:block; }

/* ===========================================================
   Industries / tag grid
   =========================================================== */
.tag-grid{ display:flex; flex-wrap:wrap; gap: 12px; margin-bottom: 28px; }
.tag-pill{
  border: 1px solid var(--line);
  background: var(--bg-raised);
  color: var(--ink);
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 0.92rem;
  cursor:pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.tag-pill:hover, .tag-pill.active{
  border-color: var(--signal);
  background: var(--bg-raised-2);
}
.tag-detail{
  border-top: 1px solid var(--line-soft);
  padding-top: 24px;
  font-size: 1.02rem;
  color: var(--ink);
  min-height: 1.6em;
  max-width: 62ch;
}

/* ===========================================================
   Solutions (accordion)
   =========================================================== */
.service-list{ border-top: 1px solid var(--line-soft); }
.service-item{ border-bottom: 1px solid var(--line-soft); }
.service-trigger{
  width:100%; text-align:left; background:none; border:none; color: var(--ink);
  display:flex; align-items:center; justify-content:space-between; gap: 20px;
  padding: 26px 0; cursor:pointer; font-family: var(--font-display); font-size: 1.3rem;
}
.service-trigger .service-teaser{
  font-family: var(--font-body); font-size: 0.92rem; color: var(--ink-muted); font-weight: 400;
  display:block; margin-top: 6px;
}
.service-trigger .plus{
  font-family: var(--font-body); font-size: 1.4rem; color: var(--ink-faint); flex-shrink:0;
  transition: transform 0.2s ease;
}
.service-item.open .plus{ transform: rotate(45deg); color: var(--signal); }
.service-body{
  max-height:0; overflow:hidden; transition: max-height 0.25s ease;
}
.service-body-inner{ padding: 0 0 28px; max-width: 62ch; color: var(--ink-muted); }

/* ===========================================================
   Approach stepper
   =========================================================== */
.stepper{ display:grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; }
.stepper-list{ border-left: 1px solid var(--line); }
.step-row{
  display:flex; align-items:baseline; gap: 18px;
  padding: 18px 0 18px 24px; margin-left:-1px; border-left: 1px solid transparent;
  cursor:pointer; background:none; width:100%; text-align:left; border-top:none; border-right:none; border-bottom:none;
  color: var(--ink-muted); font-family: var(--font-body);
}
.step-row .step-num{ font-family: var(--font-display); font-size: 1rem; color: var(--ink-faint); }
.step-row .step-title{ font-size: 1.05rem; }
.step-row.active{ color: var(--ink); border-left-color: var(--signal); }
.step-row.active .step-num{ color: var(--signal); }
.stepper-detail{
  background: var(--bg-raised); border: 1px solid var(--line-soft); border-radius: var(--radius-md);
  padding: 36px; align-self:start; position:sticky; top: 100px;
}
.stepper-detail p{ color: var(--ink); max-width: 48ch; margin:0; }
.stepper-detail .detail-num{ color: var(--signal); font-family: var(--font-display); font-size: 2.2rem; display:block; margin-bottom: 14px; }

/* ===========================================================
   Technology & audience intelligence
   =========================================================== */
.intelligence{ background: var(--bg-raised); }
.intelligence-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items:start; }
.intelligence-note{ color: var(--ink-faint); font-size: 0.92rem; }
.demo-label{ font-size: 0.82rem; color: var(--ink-faint); text-transform: none; margin-bottom:16px; }
.demo-verticals{ display:flex; flex-wrap:wrap; gap:10px; margin-bottom: 20px; }
.demo-verticals button{
  background: var(--bg-void); border: 1px solid var(--line); color: var(--ink-muted);
  padding: 9px 16px; border-radius: 999px; font-size: 0.86rem; cursor:pointer;
  transition: all 0.15s ease; font-family: var(--font-body);
}
.demo-verticals button:hover, .demo-verticals button.active{ border-color: var(--signal); color: var(--ink); }
.demo-panel{
  background: var(--bg-void); border: 1px solid var(--line-soft); border-radius: var(--radius-md);
  padding: 28px; min-height: 220px;
}
.demo-placeholder{ color: var(--ink-faint); margin:0; }
.demo-metric{ margin-bottom: 18px; }
.demo-metric:last-child{ margin-bottom:0; }
.demo-metric-label{ display:flex; justify-content:space-between; font-size: 0.86rem; color: var(--ink-muted); margin-bottom: 8px; }
.demo-metric-track{ height: 6px; background: var(--line); border-radius: 4px; overflow:hidden; }
.demo-metric-fill{ height:100%; background: var(--teal); border-radius:4px; width:0%; transition: width 0.6s ease; }

/* ===========================================================
   Why Vesalor — comparison slider
   =========================================================== */
.compare{
  position: relative;
  border: 1px solid var(--line-soft); border-radius: var(--radius-md); overflow:hidden;
  min-height: 320px; user-select:none;
}
.compare-panel{ position:absolute; inset:0; width:100%; height:100%; padding: 40px; }
.compare-old{ background: var(--bg-raised); z-index:1; }
.compare-new{
  background: linear-gradient(135deg, var(--bg-raised-2), #16192b);
  clip-path: inset(0 0 0 50%);
  z-index:2;
}
.compare-title{ font-family: var(--font-display); font-size: 1.15rem; color: var(--ink); margin-bottom: 18px; }
.compare-panel ul{ margin:0; padding:0; list-style:none; display:flex; flex-direction:column; gap:12px; }
.compare-panel li{ color: var(--ink-muted); font-size: 0.96rem; padding-left: 18px; position:relative; }
.compare-old li::before{ content:"×"; position:absolute; left:0; color: var(--ink-faint); }
.compare-new li::before{ content:"✓"; position:absolute; left:0; color: var(--teal); }
.compare-new li{ color: var(--ink); }
.compare-handle{
  position:absolute; top:0; bottom:0; left:50%;
  width: 40px; margin-left:-20px;
  display:flex; align-items:center; justify-content:center;
  cursor: ew-resize; touch-action: none;
}
.compare-handle::before{
  content:""; position:absolute; top:0; bottom:0; left:50%; width:1px; background: var(--signal);
}
.compare-handle::after{
  content:"⇔"; background: var(--signal); color:#08080a; width:34px; height:34px; border-radius:50%;
  display:flex; align-items:center; justify-content:center; font-size: 0.95rem; z-index:2;
}
.compare-hint{ margin-top: 16px; font-size: 0.86rem; color: var(--ink-faint); }

/* ===========================================================
   Campaign concepts / Insights — cards
   =========================================================== */
.concept-grid, .insight-grid{
  display:grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.concept-card, .insight-card{
  border: 1px solid var(--line-soft); border-radius: var(--radius-md);
  padding: 28px; background: var(--bg-raised);
}
.concept-tag, .insight-tag{ font-size: 0.8rem; color: var(--signal); margin-bottom: 14px; }
.concept-card h3, .insight-card h3{ font-size: 1.2rem; margin-bottom: 12px; }
.concept-card p, .insight-card p{ font-size: 0.94rem; margin-bottom: 0; }
.insight-card p{ margin-bottom: 18px; }
.insight-status{
  display:inline-block; font-size: 0.76rem; color: var(--ink-faint);
  border: 1px solid var(--line); padding: 5px 10px; border-radius: 999px;
}

/* ===========================================================
   About
   =========================================================== */
.about-grid{ display:grid; grid-template-columns: 1.1fr 0.9fr; gap: 64px; }
.about-note{ font-size: 0.88rem; color: var(--ink-faint); font-style: italic; }
.about-principles{ display:flex; flex-direction:column; gap: 28px; }
.principle-title{ font-family: var(--font-display); color: var(--ink); font-size: 1.1rem; margin-bottom: 8px; }
.about-principles p:not(.principle-title){ font-size: 0.94rem; }

/* ===========================================================
   Contact
   =========================================================== */
.contact-grid{ display:grid; grid-template-columns: 0.8fr 1.2fr; gap: 64px; }
.contact-copy h2{ font-size: clamp(1.9rem, 3vw, 2.6rem); }
.contact-form{ display:flex; flex-direction:column; gap: 20px; }
.form-row{ display:flex; flex-direction:column; gap: 8px; }
.form-row-split{ display:grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-row-split .form-row{ margin:0; }
label{ font-size: 0.86rem; color: var(--ink-muted); }
label .optional{ color: var(--ink-faint); }
input, textarea, select{
  background: var(--bg-raised); border: 1px solid var(--line); color: var(--ink);
  padding: 13px 16px; border-radius: var(--radius-sm); font-family: var(--font-body); font-size: 0.96rem;
}
input:focus, textarea:focus, select:focus{ border-color: var(--signal); }
textarea{ resize: vertical; }
.form-note{ font-size: 0.88rem; color: var(--teal); min-height: 1.2em; }

/* ===========================================================
   Footer
   =========================================================== */
.site-footer{ padding: 56px 0 40px; }
.footer-grid{
  display:grid; grid-template-columns: 1fr 1.4fr 1fr; align-items:start; gap: 24px;
}
.footer-tagline{ color: var(--ink-faint); font-size: 0.88rem; margin-top: 10px; }
.footer-nav{ display:flex; flex-wrap:wrap; gap: 20px; }
.footer-nav a{ color: var(--ink-muted); text-decoration:none; font-size: 0.9rem; }
.footer-nav a:hover{ color: var(--ink); }
.footer-copy{ text-align:right; color: var(--ink-faint); font-size: 0.86rem; margin:0; }

/* ===========================================================
   Responsive
   =========================================================== */
@media (max-width: 900px){
  .primary-nav{ display:none; }
  .nav-toggle{ display:flex; }
  .nav-contact{ display:none; }

  .site-header.nav-open .primary-nav{
    display:flex; flex-direction:column; position:absolute; top:68px; left:0; right:0;
    background: var(--bg-void); border-bottom: 1px solid var(--line-soft); padding: 20px 28px; gap: 18px;
  }

  .hero-grid, .intelligence-grid, .about-grid, .contact-grid, .stepper{
    grid-template-columns: 1fr; gap: 40px;
  }
  .hero-visual{ order:-1; max-width: 280px; margin: 0 auto; }
  .stepper-detail{ position:static; }
  .concept-grid, .insight-grid{ grid-template-columns: 1fr; }
  .compare{ min-height:auto; }
  .compare-panel{ position:static; width:auto; height:auto; clip-path:none !important; }
  .compare-old{ border-bottom: 1px solid var(--line-soft); }
  .compare-handle{ display:none; }
  .form-row-split{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr; text-align:left; }
  .footer-copy{ text-align:left; }
  .section{ padding: 84px 0; }
}