/* Karim Jadallah — AI Strategy Consulting · site.css
   Ein Stylesheet für Desktop und Mobile (responsive, mobile-first). */

@font-face{font-family:"Source Serif 4";src:url(../fonts/source-serif-4-latin-400-normal.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Source Serif 4";src:url(../fonts/source-serif-4-latin-600-normal.woff2) format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:"IBM Plex Sans";src:url(../fonts/ibm-plex-sans-latin-400-normal.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"IBM Plex Sans";src:url(../fonts/ibm-plex-sans-latin-500-normal.woff2) format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url(../fonts/ibm-plex-mono-latin-400-normal.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url(../fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2");font-weight:500;font-display:swap}

:root{
  --paper:#f6f4ef; --paper-2:#ece8df; --navy:#14233a; --navy-deep:#0e1a2c;
  --ink:#0f1b2d; --ink-muted:#4b5567; --on-navy:#f6f4ef; --on-navy-muted:#aeb7c4;
  --signal:#ea3f3f; --signal-text:#bf2a30; --signal-on-navy:#ff6b66;
  --hairline:#cfc8ba; --hairline-navy:#2b3a50; --line:#8a8275;
  --serif:"Source Serif 4","Source Serif Pro",Georgia,serif;
  --sans:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;
  --wrap:1200px; --gutter:clamp(20px,5vw,48px);
  --sec:clamp(64px,10vw,112px);
  --header-h:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 12px)}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{display:block;max-width:100%}
a{color:inherit}
::selection{background:var(--signal);color:#fff}
:focus-visible{outline:2px solid var(--signal-text);outline-offset:3px}
.navy :focus-visible,.hero :focus-visible,.site-header :focus-visible{outline-color:var(--signal-on-navy)}
.skip{position:absolute;left:-9999px;top:0;background:var(--paper);color:var(--ink);padding:12px 16px;z-index:100}
.skip:focus{left:12px;top:12px}

.wrap{max-width:var(--wrap);margin:0 auto;padding-left:max(var(--gutter),env(safe-area-inset-left));padding-right:max(var(--gutter),env(safe-area-inset-right))}
.sec{padding:var(--sec) 0}
.alt{background:var(--paper-2)}
.navy{background:var(--navy);color:var(--on-navy)}

/* ---------- Typo ---------- */
h1,h2,h3{font-family:var(--serif);font-weight:400;margin:0;color:inherit;text-wrap:balance}
h1{font-size:clamp(36px,5vw,62px);line-height:1.08;letter-spacing:-.012em}
h2{font-size:clamp(28px,3.4vw,40px);line-height:1.18;letter-spacing:-.006em;max-width:22ch}
h3{font-size:clamp(20px,1.7vw,22px);line-height:1.35;font-weight:600}
p{margin:0 0 1em}
.lead{font-size:clamp(18px,1.6vw,20px);line-height:1.6;max-width:36em;color:var(--ink-muted);margin-top:24px}
.navy .lead,.hero .lead{color:var(--on-navy-muted)}
.muted{color:var(--ink-muted)}
.small{font-size:14px;line-height:1.6}
.eyebrow{font-family:var(--mono);font-weight:500;font-size:12px;line-height:16px;letter-spacing:.16em;text-transform:uppercase;color:var(--signal-text);margin:0 0 12px}
.navy .eyebrow,.hero .eyebrow{color:var(--on-navy-muted)}
.rule{width:40px;height:3px;background:var(--signal);margin:0 0 24px;border:0}
.data{font-family:var(--mono);font-size:13.5px;line-height:1.6;color:var(--ink-muted);margin:12px 0 0}
.data b{color:var(--signal-text);font-weight:500}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:14px 26px;border-radius:2px;border:1px solid transparent;font:500 15px/1.2 var(--sans);letter-spacing:.01em;text-decoration:none;cursor:pointer;transition:background .2s,color .2s,border-color .2s,transform .2s}
.btn-primary{background:var(--navy);color:var(--on-navy)}
.btn-primary:hover{background:var(--navy-deep)}
.navy .btn-primary,.hero .btn-primary,.site-header .btn-primary,.mobile-cta .btn-primary{background:var(--on-navy);color:var(--navy)}
.navy .btn-primary:hover,.hero .btn-primary:hover,.site-header .btn-primary:hover{background:#fff}
.btn-outline{background:transparent;border-color:var(--line);color:var(--ink)}
.btn .arrow{transition:transform .2s}
.btn:hover .arrow{transform:translateX(3px)}
.link{color:var(--signal-text);font-weight:500;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:5px}
.navy .link,.hero .link{color:var(--on-navy);text-decoration-color:var(--signal)}
.link:hover{text-decoration-color:var(--signal);text-decoration-thickness:2px}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(20,35,58,.94);-webkit-backdrop-filter:saturate(140%) blur(10px);backdrop-filter:saturate(140%) blur(10px);color:var(--on-navy);padding-top:env(safe-area-inset-top);border-bottom:1px solid transparent;transition:border-color .3s}
.site-header.scrolled{border-bottom-color:var(--hairline-navy)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:var(--header-h);gap:24px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--on-navy);min-width:0}
.brand img{width:52px;height:auto;flex:none}
.brand-text{display:flex;flex-direction:column;line-height:1.1;white-space:nowrap}
.brand-name{font-family:var(--serif);font-weight:600;font-size:17px;letter-spacing:.06em}
.brand-sub{font-family:var(--mono);font-size:9.5px;letter-spacing:.22em;color:var(--on-navy-muted);margin-top:5px}
.nav{display:flex;align-items:center;gap:28px}
.nav a{font-size:15px;text-decoration:none;color:var(--on-navy)}
.nav a:not(.btn):hover{color:#fff;text-decoration:underline;text-decoration-color:var(--signal);text-underline-offset:6px}
.nav .lang{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--on-navy-muted)}
.nav .lang strong{color:var(--on-navy);font-weight:500}
.nav .btn{min-height:42px;padding:10px 18px;font-size:14px}
.menu-toggle{display:none;background:none;border:0;color:var(--on-navy);width:48px;height:48px;margin-right:-12px;cursor:pointer;align-items:center;justify-content:center}
.menu-toggle span,.menu-toggle span::before,.menu-toggle span::after{display:block;width:22px;height:2px;background:currentColor;position:relative;transition:transform .25s,background .25s}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0}
.menu-toggle span::before{top:-7px}.menu-toggle span::after{top:7px}
.menu-open .menu-toggle span{background:transparent}
.menu-open .menu-toggle span::before{transform:translateY(7px) rotate(45deg)}
.menu-open .menu-toggle span::after{transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--navy);color:var(--on-navy);isolation:isolate}
.hero .wrap{position:relative;display:flex;align-items:center;min-height:min(88vh,800px);padding-top:clamp(56px,8vw,112px);padding-bottom:0}
.hero-copy{padding-bottom:clamp(64px,9vw,128px);position:relative;z-index:2;max-width:780px}
.hero h1{max-width:19ch}
.hero .lead{max-width:30em}
.hero .actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px 28px;margin-top:40px}
.hero-art{position:absolute;right:calc(-1 * var(--gutter));bottom:0;width:min(620px,43vw);z-index:1}
.hero-art img{width:100%;height:auto;filter:drop-shadow(0 0 40px rgba(234,63,63,.18))}
.hero-glow{position:absolute;inset:auto -10% -30% 40%;height:70%;background:radial-gradient(closest-side,rgba(234,63,63,.10),transparent);z-index:0;pointer-events:none}
.scroll-hint{position:absolute;left:var(--gutter);bottom:28px;font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--on-navy-muted);text-transform:uppercase;display:flex;align-items:center;gap:10px;z-index:2}
.scroll-hint::before{content:"";width:28px;height:1px;background:var(--signal)}

/* ---------- Problem ---------- */
.two{display:grid;grid-template-columns:5fr 7fr;gap:clamp(32px,6vw,96px);align-items:start}
.two > div:last-child > p{font-size:clamp(17px,1.4vw,19px);color:var(--ink-muted);max-width:34em}
.signal-list{list-style:none;margin:28px 0 0;padding:0;border-top:1px solid var(--hairline)}
.signal-list li{display:flex;gap:16px;align-items:baseline;padding:14px 0;border-bottom:1px solid var(--hairline)}
.signal-list .no{flex:none}

/* ---------- Steps ---------- */
.no{font-family:var(--mono);font-size:12px;letter-spacing:.16em;color:var(--signal-text)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);margin-top:56px;border-top:1px solid var(--hairline);counter-reset:s}
.steps article{padding:28px 28px 0 0;position:relative}
.steps article::before{content:"";position:absolute;top:-1px;left:0;width:0;height:3px;background:var(--signal);transition:width .6s ease}
.steps article.in::before{width:40px}
.steps h3{margin:10px 0 12px}
.steps p{color:var(--ink-muted);font-size:16px}

/* ---------- Cases ---------- */
.cases{display:grid;grid-template-columns:repeat(2,1fr);margin-top:56px;border-top:1px solid var(--hairline)}
.case{padding:36px 40px 36px 0;border-bottom:1px solid var(--hairline)}
.case:nth-child(odd){border-right:1px solid var(--hairline)}
.case:nth-child(even){padding-left:40px;padding-right:0}
.case h3{margin-bottom:10px}
.case p{color:var(--ink-muted);margin:0}
.note{margin-top:24px}

/* ---------- Control ---------- */
.control{display:grid;grid-template-columns:7fr 5fr;gap:clamp(32px,6vw,96px);align-items:end}
.pillars{list-style:none;margin:0;padding:0;border-top:1px solid var(--hairline)}
.pillars li{display:flex;gap:18px;align-items:baseline;padding:20px 0;border-bottom:1px solid var(--hairline);font-size:18px}
blockquote{margin:40px 0 0;padding:0;font-family:var(--serif);font-size:clamp(22px,2.2vw,27px);line-height:1.4;max-width:26em}

/* ---------- About ---------- */
.about{display:grid;grid-template-columns:7fr 5fr;gap:clamp(32px,6vw,96px);align-items:center}
.portrait{aspect-ratio:4/5;background:var(--navy);position:relative;overflow:hidden}
.portrait img.photo{width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.05)}
.portrait .ph{position:absolute;inset:0;display:flex;align-items:flex-end;padding:20px}
.portrait .ph img{position:absolute;right:-20%;bottom:-6%;width:120%;opacity:.55}
.portrait .ph span{position:relative;font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--on-navy-muted)}
.facts{list-style:none;margin:32px 0 0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--hairline)}
.facts li{padding:18px 16px 0 0}
.facts b{display:block;font-family:var(--serif);font-weight:400;font-size:22px;color:var(--ink)}
.facts span{font-size:14px;color:var(--ink-muted)}

/* ---------- Contact ---------- */
.contact{display:grid;grid-template-columns:5fr 6fr;gap:clamp(40px,6vw,96px)}
.contact .alt-contact{margin-top:32px;display:flex;flex-direction:column;gap:14px}
.contact .alt-contact a{font-size:17px}
form{display:grid;gap:18px}
.field{display:grid;gap:6px}
.field label{font-size:14px;color:var(--on-navy-muted)}
.field input,.field textarea{width:100%;font:16px/1.5 var(--sans);color:var(--on-navy);background:rgba(255,255,255,.03);border:1px solid #6e7a8c;border-radius:2px;padding:13px 14px;-webkit-appearance:none;appearance:none}
.field textarea{min-height:140px;resize:vertical}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--signal-on-navy);box-shadow:0 0 0 1px var(--signal-on-navy)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.check{display:flex;gap:12px;align-items:flex-start;font-size:14px;color:var(--on-navy-muted)}
.check input{width:20px;height:20px;margin:2px 0 0;accent-color:var(--signal)}
.check a{color:var(--on-navy)}
.form-status{font-size:14px;min-height:1.4em;color:var(--on-navy-muted)}
.hp{position:absolute;left:-9999px}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy-deep);color:var(--on-navy-muted);padding:56px 0 calc(40px + env(safe-area-inset-bottom));font-size:14px}
.site-footer .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;align-items:start}
.site-footer .brand img{width:64px}
.site-footer h4{font:500 12px/16px var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--on-navy);margin:0 0 14px}
.site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.site-footer a{text-decoration:none}
.site-footer a:hover{color:var(--on-navy);text-decoration:underline;text-decoration-color:var(--signal);text-underline-offset:5px}
.legal{grid-column:1/-1;border-top:1px solid var(--hairline-navy);padding-top:24px;margin-top:24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

/* ---------- Mobile CTA (nur Smartphone) ---------- */
.mobile-cta{display:none}

/* ---------- Unterseiten (Impressum/Datenschutz) ---------- */
.page-head{padding-top:clamp(56px,8vw,96px);padding-bottom:clamp(32px,4vw,48px)}
.prose{max-width:720px}
.prose h2{font-size:clamp(22px,2.4vw,28px);margin:48px 0 12px}
.prose p,.prose li{color:var(--ink-muted)}
.todo{background:#fff3f2;border-left:0;outline:1px dashed var(--signal-text);padding:2px 6px;font-family:var(--mono);font-size:.85em;color:var(--signal-text)}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .steps article::before{transition:none}
}

/* =========================================================
   Tablet  (≤ 1024px)
   ========================================================= */
@media (max-width:1024px){
  .nav{gap:20px}
  .hero-art{width:min(520px,40vw)}
  .steps{grid-template-columns:repeat(2,1fr);row-gap:40px}
}

/* =========================================================
   Smartphone (≤ 820px): Burger-Menü, einspaltig, Daumen-Zone
   ========================================================= */
@media (max-width:820px){
  :root{--header-h:64px}
  body{font-size:16.5px}
  .site-header{-webkit-backdrop-filter:none;backdrop-filter:none;background:var(--navy)}
  .menu-toggle{display:inline-flex}
  .nav{position:fixed;inset:calc(var(--header-h) + env(safe-area-inset-top)) 0 0 0;flex-direction:column;align-items:stretch;gap:0;background:var(--navy);padding:8px max(var(--gutter),env(safe-area-inset-left)) calc(24px + env(safe-area-inset-bottom));transform:translateY(-8px);opacity:0;visibility:hidden;transition:opacity .25s,transform .25s,visibility .25s;overflow-y:auto}
  .menu-open .nav{opacity:1;visibility:visible;transform:none}
  .nav a:not(.btn){font-family:var(--serif);font-size:28px;padding:16px 0;border-bottom:1px solid var(--hairline-navy)}
  .nav .lang{font-family:var(--mono)!important;font-size:13px!important;border:0!important;padding:24px 0!important}
  .nav .btn{margin-top:8px;min-height:54px;font-size:16px}
  .menu-open{overflow:hidden}

  .brand img{width:44px}
  .brand-name{font-size:15px}
  .brand-sub{font-size:8.5px;letter-spacing:.18em}

  .hero .wrap{display:block;min-height:auto;padding-top:48px}
  .hero-copy{padding-bottom:0}
  .hero .actions{flex-direction:column;align-items:stretch;gap:18px}
  .hero .actions .btn{width:100%;min-height:54px}
  .hero .actions .link{align-self:flex-start}
  .hero-art{position:relative;right:auto;width:112%;max-width:520px;margin:40px auto -2px;left:-6%}
  .scroll-hint{display:none}

  .two,.control,.about,.contact{grid-template-columns:1fr}
  .steps,.cases{grid-template-columns:1fr}
  .steps article{padding-right:0}
  .case,.case:nth-child(even){padding:28px 0;border-right:0}
  .facts{grid-template-columns:1fr 1fr 1fr}
  .facts b{font-size:19px}
  .portrait{max-width:420px}
  .row2{grid-template-columns:1fr}
  .site-footer .wrap{grid-template-columns:1fr 1fr}
  .site-footer .footer-brand{grid-column:1/-1}

  /* Sticky Kontakt-Leiste in der Daumen-Zone */
  .mobile-cta{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:40;gap:10px;padding:10px max(16px,env(safe-area-inset-left)) calc(10px + env(safe-area-inset-bottom));background:rgba(14,26,44,.96);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-top:1px solid var(--hairline-navy);transform:translateY(110%);transition:transform .3s}
  .mobile-cta.show{transform:none}
  .mobile-cta .btn{flex:1;min-height:50px}
  .mobile-cta .btn-outline{flex:0 0 auto;border-color:#6e7a8c;color:var(--on-navy)}
  body.has-cta .site-footer{padding-bottom:calc(110px + env(safe-area-inset-bottom))}
}
@media (max-width:420px){
  .facts{grid-template-columns:1fr;gap:0}
  .facts li{padding:14px 0;border-bottom:1px solid var(--hairline)}
  .site-footer .wrap{grid-template-columns:1fr}
}
/* Querformat Smartphone: Hero kompakter */
@media (max-width:950px) and (orientation:landscape) and (max-height:500px){
  .hero-art{width:40%;max-width:none;position:absolute;right:0;left:auto;margin:0}
  .hero-copy{max-width:58%}
}
@media print{
  .site-header,.mobile-cta,.hero-art,.hero-glow{display:none}
  body{background:#fff}
}

/* Layout safeguards for tablet navigation and narrow screens */
.control > .note{grid-column:1/-1;order:3}
.eyebrow,.data,a{overflow-wrap:anywhere}
@media (min-width:821px) and (max-width:1100px){.nav{gap:14px}.nav .btn{display:none}.brand-sub{letter-spacing:.12em}}
@media (max-width:380px){.mobile-cta .btn{font-size:13px;padding:12px}.brand-sub{font-size:8px;letter-spacing:.1em}}