/*
 * Ingestics Website — Design System Stylesheet
 * ==============================================
 * Direct implementation of DESIGN-SPEC.md — the single approved source of
 * truth for the site's visual language. Every value below is traceable to
 * a specific DESIGN-SPEC.md section; do not add new colors, fonts, radii,
 * or spacing values here without updating DESIGN-SPEC.md first.
 *
 * Reference mockup this was extracted from: mockups/homepage-direction-a-signal-v2.html
 * (Lighthouse-verified: 100/100 Accessibility, 100/100 Best Practices, desktop)
 *
 * Phase 1 scope (EXECUTION-PLAN.md): design tokens + reusable component
 * classes only. Page-specific content/layout lives in individual page
 * templates (Classic Editor Text blocks referencing these classes), not here.
 */

/* ===================================================================
   1. DESIGN TOKENS — DESIGN-SPEC.md Section 1
   =================================================================== */
:root{
  /* Color */
  --bg:            #FAFBFC;   /* page background */
  --surface:       #FFFFFF;   /* cards, headers, elevated panels */
  --ink:           #14171F;   /* primary text, headings */
  --muted:         #5B6472;   /* body copy, secondary text */
  --accent:        #2F5EFF;   /* primary brand blue — large-area fills (buttons, active tabs) */
  --accent-text:   #2650DE;   /* accent tuned for AA text contrast — small text/links/labels */
  --accent-ink:    #E8ECFF;   /* light blue tint — eyebrow pills, icon tile backgrounds */
  --teal:          #0D9488;   /* secondary accent — "live/automation/success" signal */
  --teal-ink:      #E1F5F3;   /* light teal tint — teal icon tile backgrounds */
  --success:       #0E7A4E;   /* checkmarks, trust-bar icons, positive confirmations */
  --border:        #E4E7EC;   /* all hairline borders */

  /* Layout */
  --radius:        12px;      /* default card/component corner radius */
  --maxw:          1180px;    /* max content width, all sections */

  /* Typography */
  --font-head: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* ===================================================================
   2. BASE ELEMENTS — DESIGN-SPEC.md Section 2
   =================================================================== */
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{font-family:var(--font-head);font-weight:600;line-height:1.15;margin:0 0 16px;color:var(--ink);}
p{margin:0 0 16px;color:var(--muted);}
a{color:var(--accent);text-decoration:none;}
p a, .faq-item a{text-decoration:underline;text-underline-offset:2px;}
svg.icon{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;}

/* ===================================================================
   3. LAYOUT / SPACING — DESIGN-SPEC.md Section 3
   =================================================================== */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section-alt{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.section-head{text-align:center;max-width:680px;margin:0 auto 56px;}
.section-head h2{font-size:2.1rem;}

/* ===================================================================
   4. COMPONENT LIBRARY — DESIGN-SPEC.md Section 4
   =================================================================== */

/* --- Eyebrow label --- */
.eyebrow{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:12.5px;font-weight:500;letter-spacing:.04em;text-transform:uppercase;
  color:var(--accent-text);background:var(--accent-ink);padding:6px 12px;border-radius:20px;margin-bottom:16px;
}

/* --- Buttons --- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-body);font-weight:600;font-size:15px;
  padding:13px 24px;border-radius:8px;border:1px solid transparent;cursor:pointer;
  transition:background .15s ease,border-color .15s ease,transform .15s ease;
}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:#2650DE;transform:translateY(-1px);}
.btn-secondary{background:transparent;color:var(--ink);border-color:var(--border);}
.btn-secondary:hover{border-color:var(--ink);}

/* --- Sticky header / nav --- */
header{
  position:sticky;top:0;z-index:50;background:rgba(250,251,252,.9);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border);
}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;max-width:var(--maxw);margin:0 auto;}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-head);font-weight:700;font-size:19px;color:var(--ink);}
.brand .logo-mark{width:28px;height:28px;border-radius:7px;background:var(--accent);display:flex;align-items:center;justify-content:center;color:#fff;font-family:var(--font-mono);font-size:14px;font-weight:700;}
.nav-menu{display:flex;align-items:center;gap:32px;}
.navlinks{display:flex;gap:32px;list-style:none;margin:0;padding:0;}
.navlinks a{color:var(--ink);font-size:14.5px;font-weight:500;}
.navlinks a:hover{color:var(--accent);}
.nav-cta{display:flex;gap:12px;align-items:center;}
.nav-cta .btn{padding:10px 16px;font-size:14px;}
.nav-cta .btn-primary{padding-inline:18px;}
.nav-toggle{display:none;background:transparent;border:0;padding:8px;cursor:pointer;}
.nav-toggle > span:not(.screen-reader-text){display:block;width:22px;height:2px;margin:4px 0;background:var(--ink);transition:transform .15s ease,opacity .15s ease;}

/* --- Hero (55/45 split, DESIGN-SPEC.md Section 3) --- */
.hero{padding:72px 0 64px;}
.hero-grid{display:grid;grid-template-columns:55fr 45fr;gap:56px;align-items:center;}
.hero h1{font-size:2.9rem;letter-spacing:-.01em;margin-bottom:20px;}
.hero .sub{font-size:1.15rem;color:var(--muted);margin-bottom:28px;}
.hero-ctas{display:flex;gap:14px;margin-bottom:28px;flex-wrap:wrap;}
.trust-line{display:flex;gap:10px;flex-wrap:wrap;font-size:13px;color:var(--muted);}
.trust-line span{display:flex;align-items:center;gap:6px;}
.trust-line svg{width:15px;height:15px;color:var(--success);}

/* --- Screenshot frame (browser-chrome placeholder wrapper) --- */
.shot-frame{
  background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden;
  box-shadow:0 1px 2px rgba(20,23,31,.04), 0 16px 40px rgba(20,23,31,.08);
}
.shot-chrome{display:flex;align-items:center;gap:6px;padding:10px 14px;background:var(--bg);border-bottom:1px solid var(--border);}
.shot-chrome .dot{width:9px;height:9px;border-radius:50%;background:var(--border);}
.shot-body{
  aspect-ratio:16/11;background:
    linear-gradient(135deg, var(--accent-ink) 0%, var(--bg) 100%);
  display:flex;align-items:center;justify-content:center;flex-direction:column;gap:10px;padding:24px;text-align:center;
}
.shot-body .placeholder-label{font-family:var(--font-mono);font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--accent-text);background:#fff;padding:6px 14px;border-radius:20px;border:1px solid var(--accent-ink);}
.shot-body .placeholder-desc{font-size:13px;color:var(--muted);max-width:300px;}

/* --- Icon tile --- */
.icon-tile{
  width:44px;height:44px;border-radius:10px;background:var(--accent-ink);color:var(--accent-text);
  display:flex;align-items:center;justify-content:center;margin-bottom:18px;flex-shrink:0;
}
.icon-tile.teal{background:var(--teal-ink);color:var(--teal);}

/* --- Trust bar --- */
.trust-bar{display:flex;flex-wrap:wrap;justify-content:center;gap:36px;padding:32px 0;}
.trust-bar .item{display:flex;align-items:center;gap:10px;font-size:14.5px;font-weight:500;color:var(--ink);}
.trust-bar svg{color:var(--success);}

/* --- 4-step card ("How it works") --- */
.steps4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.step4{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;position:relative;}
.step4 .step-num{font-family:var(--font-mono);font-size:12px;color:var(--muted);margin-bottom:10px;}
.step4 h3{font-size:1.05rem;margin-bottom:8px;}
.step4 p{font-size:13.5px;margin-bottom:0;}

/* --- Tab navigation (product interface) --- */
.tabs-nav{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:28px;}
.tab-btn{
  font-family:var(--font-body);font-size:13.5px;font-weight:600;padding:9px 16px;border-radius:8px;
  border:1px solid var(--border);background:var(--surface);color:var(--muted);cursor:pointer;
}
.tab-btn.active{background:var(--ink);color:#fff;border-color:var(--ink);}

/* --- Outcome card --- */
.outcomes-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.outcome-card{display:flex;gap:14px;align-items:flex-start;padding:20px;background:var(--surface);border:1px solid var(--border);border-radius:10px;}
.outcome-card svg{color:var(--teal);margin-top:2px;}
.outcome-card p{margin:0;font-size:14.5px;color:var(--ink);font-weight:500;}

/* --- Solution card (3-card grid: Publishers / Developers / Agencies, per ARCHITECTURE.md persona IA) --- */
.solutions-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.solution-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;transition:border-color .15s ease;}
.solution-card:hover{border-color:var(--accent);}
.solution-card h3{font-size:1.05rem;margin-bottom:8px;}
.solution-card p{font-size:13.5px;margin-bottom:14px;}
.solution-card a{font-size:13px;font-weight:600;}

/* --- Why-item (differentiator list) --- */
.why-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.why-item{display:flex;gap:14px;align-items:flex-start;}
.why-item .icon-tile{margin-bottom:0;width:38px;height:38px;}
.why-item h3{font-size:1rem;margin-bottom:4px;}
.why-item p{font-size:13.5px;margin-bottom:0;}

/* --- Security box (dark inverted block — use once per page, max) --- */
.security-box{
  background:var(--ink);color:#fff;border-radius:16px;padding:44px;display:flex;gap:32px;align-items:center;flex-wrap:wrap;
}
.security-box .icon-tile{background:rgba(255,255,255,.1);color:#fff;}
.security-box h2{color:#fff;font-size:1.6rem;margin-bottom:10px;}
.security-box p{color:#B8BFCC;margin-bottom:12px;}
.security-box a{color:#fff;font-weight:600;text-decoration:underline;}

/* --- Solution scenario card (must always carry "Illustrative Example" label — CONTENT.md rule) --- */
.scenario-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:36px;}
.scenario-label{font-family:var(--font-mono);font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:12px;}
.scenario-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:24px;}
.scenario-steps div{font-size:13px;padding:14px;background:var(--bg);border-radius:8px;border:1px solid var(--border);}
.scenario-steps strong{display:block;font-size:12px;color:var(--accent-text);margin-bottom:4px;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.03em;}

/* --- Pricing teaser (homepage only — full comparison lives at /pricing/, single-source-of-truth rule) --- */
.pricing-teaser{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.price-mini{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:20px;text-align:center;}
.price-mini.featured{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-ink);}
.price-mini .tier-name{font-family:var(--font-mono);font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:8px;}
.price-mini .tier-price{font-family:var(--font-head);font-size:1.3rem;font-weight:700;margin-bottom:4px;}

/* --- FAQ list --- */
.faq-list{display:grid;gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;}
.faq-item{background:var(--surface);padding:22px 26px;}
.faq-item h3{font-size:1rem;margin-bottom:8px;}
.faq-item p{font-size:14px;margin-bottom:0;}

/* --- Final CTA --- */
.final-cta{background:var(--accent-ink);border-radius:20px;padding:64px 48px;text-align:center;}
.final-cta h2{font-size:2rem;}
.final-cta p{max-width:560px;margin:0 auto 32px;}

/* --- Footer --- */
footer{background:var(--surface);border-top:1px solid var(--border);padding:64px 0 32px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:32px;margin-bottom:48px;}
.footer-col h3{font-size:13px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);margin-bottom:16px;font-family:var(--font-body);font-weight:600;}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:10px;}
.footer-col a{font-size:14px;color:var(--ink);}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:32px;border-top:1px solid var(--border);font-size:13px;color:var(--muted);flex-wrap:wrap;gap:12px;}

/* ===================================================================
   5. RESPONSIVE — DESIGN-SPEC.md Section 9
   Single breakpoint at 900px. Mobile nav pattern NOT yet designed
   (flagged in DESIGN-SPEC.md Section 10 as an open Phase 1 task —
   navlinks currently just hide; a hamburger/off-canvas pattern must
   be added before this is genuinely mobile-complete).
   =================================================================== */
@media (max-width:900px){
  .nav{position:relative;padding-block:12px;}
  .nav-toggle{display:block;order:2;}
  .nav-toggle[aria-expanded="true"] > span:nth-of-type(2){transform:translateY(6px) rotate(45deg);}
  .nav-toggle[aria-expanded="true"] > span:nth-of-type(3){opacity:0;}
  .nav-toggle[aria-expanded="true"] > span:nth-of-type(4){transform:translateY(-6px) rotate(-45deg);}
  .nav-menu{display:none;position:absolute;top:100%;left:0;right:0;padding:20px 24px 24px;background:var(--surface);border-bottom:1px solid var(--border);box-shadow:0 12px 24px rgba(20,23,31,.08);}
  .nav-menu.is-open{display:grid;gap:20px;}
  .navlinks{display:grid;gap:4px;}
  .navlinks a{display:block;padding:10px 0;font-size:16px;}
  .nav-cta{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
  .nav-cta .btn{justify-content:center;}
  .hero-grid{grid-template-columns:1fr;}
  .hero h1{font-size:2.1rem;}
  .steps4,.outcomes-grid,.solutions-grid,.why-grid,.pricing-teaser,.scenario-steps{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .section{padding:56px 0;}
  .security-box{flex-direction:column;align-items:flex-start;}
}