/* ─────────────────────────────────────────────
   AlgoArtifica — Global Stylesheet
   Palette: Navy #0B1120 · Teal #00C9A7 · Off-white #F5F7FA
   ───────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600&family=Lora:ital,wght@0,600;0,700;1,500;1,600&display=swap');

:root {
    --navy:    #0B1120;
    --surface: #F5F7FA;
    --white:   #FFFFFF;
    --teal:    #00C9A7;
    --coral:   #FF6B6B;
    --amber:   #F59E0B;
    --muted:   #6B7A99;
    --border:  #E2E7F0;
    --text:    #1A2340;
    --radius:  12px;
    --shadow:  0 8px 28px rgba(11,17,32,0.07);
    --shadow-lg: 0 16px 48px rgba(11,17,32,0.12);
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:'Sora',sans-serif;background:var(--white);color:var(--text);-webkit-font-smoothing:antialiased;overflow-x:hidden;line-height:1.6;}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{font-family:'Lora',serif;font-weight:700;letter-spacing:-0.02em;color:var(--navy);line-height:1.2;}
h1{font-size:clamp(2.2rem,4.5vw,3.4rem);}
h2{font-size:clamp(1.5rem,3vw,2rem);}
h3{font-size:1.1rem;}
p{line-height:1.78;}

/* ── Layout ── */
.container{max-width:1180px;margin:0 auto;padding:0 2.5rem;}
.section{padding:5rem 0;}

/* ── Buttons ── */
.btn{display:inline-block;cursor:pointer;font-family:'Sora',sans-serif;font-weight:600;font-size:.85rem;letter-spacing:.01em;border:none;border-radius:8px;transition:opacity .15s,transform .15s;text-decoration:none;}
.btn:hover{opacity:.87;transform:translateY(-2px);}
.btn-teal{background:var(--teal);color:var(--navy);padding:.75rem 1.75rem;}
.btn-navy{background:var(--navy);color:#fff;padding:.75rem 1.75rem;}
.btn-ghost{background:transparent;color:var(--navy);padding:.75rem 1.5rem;border:1.5px solid var(--border);}
.btn-ghost:hover{border-color:var(--navy);}
.btn-sm{font-size:.78rem;padding:.5rem 1.1rem;}

/* ── Tags ── */
.tag{display:inline-block;font-size:.65rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:.25rem .7rem;border-radius:100px;}
.tag-teal{background:rgba(0,201,167,.12);color:var(--teal);border:1px solid rgba(0,201,167,.22);}
.tag-navy{background:var(--navy);color:#fff;}
.tag-surface{background:var(--surface);color:var(--muted);border:1px solid var(--border);}

/* ── Cards ── */
.card{border:1px solid var(--border);border-radius:var(--radius);background:var(--white);overflow:hidden;transition:box-shadow .2s,transform .2s;display:flex;flex-direction:column;}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px);}

/* ── Section header ── */
.sec-kicker{font-family:'Sora',sans-serif;font-size:.67rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--teal);margin-bottom:.4rem;display:block;}
.sec-title{font-size:clamp(1.4rem,2.5vw,1.65rem);}
.sec-header{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:2.25rem;gap:1rem;}
.see-all{font-size:.75rem;font-weight:500;color:var(--muted);border-bottom:1px solid var(--border);padding-bottom:1px;white-space:nowrap;transition:color .14s,border-color .14s;}
.see-all:hover{color:var(--navy);border-color:var(--navy);}

/* ── Avatar ── */
.av{width:30px;height:30px;border-radius:50%;background:var(--surface);border:1.5px solid var(--border);display:inline-flex;align-items:center;justify-content:center;font-size:.6rem;font-weight:700;color:var(--navy);flex-shrink:0;}
.read-chip{background:var(--surface);border:1px solid var(--border);border-radius:100px;padding:.18rem .65rem;font-size:.67rem;font-weight:500;color:var(--muted);}
.lv-dot{width:6px;height:6px;border-radius:50%;display:inline-block;}
.lv-b{background:var(--teal);}
.lv-i{background:var(--amber);}
.lv-a{background:var(--coral);}

/* ── Nav ── */
.site-nav{position:sticky;top:0;z-index:200;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border);height:64px;}
.nav-inner{height:100%;display:flex;align-items:center;justify-content:space-between;}
.nav-logo{font-weight:600;font-size:1.05rem;letter-spacing:-.03em;color:var(--navy);display:flex;align-items:center;gap:.45rem;}
.nav-logo-dot{width:8px;height:8px;border-radius:50%;background:var(--teal);}
.nav-links{display:flex;align-items:center;gap:2.25rem;list-style:none;}
.nav-links a{font-size:.82rem;font-weight:500;color:var(--muted);transition:color .14s;}
.nav-links a:hover,.nav-links a.active{color:var(--navy);}
.nav-right{display:flex;align-items:center;gap:.9rem;}
.nav-search{font-size:.9rem;color:var(--muted);cursor:pointer;padding:.35rem .5rem;border-radius:6px;transition:background .14s;user-select:none;}
.nav-search:hover{background:var(--surface);color:var(--navy);}

/* ── Language switcher ── */
.lang-switcher{position:relative;}
.lang-current{display:flex;align-items:center;gap:.35rem;background:none;border:1px solid var(--border);border-radius:7px;padding:.35rem .65rem;cursor:pointer;font-family:'Sora',sans-serif;font-size:.75rem;font-weight:500;color:var(--navy);transition:border-color .14s,background .14s;}
.lang-current:hover{background:var(--surface);border-color:var(--navy);}
.lang-code{letter-spacing:.04em;}
.lang-dropdown{display:none;position:absolute;top:calc(100% + 6px);right:0;background:var(--white);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow-lg);min-width:150px;overflow:hidden;z-index:300;}
.lang-switcher:hover .lang-dropdown,.lang-switcher:focus-within .lang-dropdown{display:block;}
.lang-option{display:flex;align-items:center;gap:.6rem;padding:.65rem 1rem;font-size:.8rem;font-weight:500;color:var(--text);cursor:pointer;transition:background .13s;text-decoration:none;}
.lang-option:hover{background:var(--surface);}
.lang-option.active{color:var(--teal);font-weight:600;}
.lang-check{margin-left:auto;color:var(--teal);font-size:.8rem;}

/* ── Mobile ── */
.burger{display:none;flex-direction:column;gap:4px;cursor:pointer;padding:.4rem;background:none;border:none;}
.burger span{display:block;width:20px;height:2px;background:var(--navy);border-radius:2px;transition:all .2s;}
.mobile-menu{display:none;position:fixed;inset:0;top:64px;z-index:190;background:rgba(255,255,255,.97);backdrop-filter:blur(14px);flex-direction:column;padding:2rem 2.5rem;gap:1.25rem;overflow-y:auto;}
.mobile-menu.open{display:flex;}
.mobile-menu a{font-size:1.05rem;font-weight:600;color:var(--navy);padding:.45rem 0;border-bottom:1px solid var(--border);}

/* ── Search overlay ── */
.search-overlay{position:fixed;inset:0;z-index:500;background:rgba(11,17,32,.85);backdrop-filter:blur(8px);display:none;align-items:flex-start;justify-content:center;padding-top:15vh;}
.search-overlay.open{display:flex;}
.search-box{background:var(--white);border-radius:var(--radius);width:100%;max-width:620px;overflow:hidden;box-shadow:var(--shadow-lg);}
.search-box form{display:flex;align-items:center;gap:.5rem;padding:.5rem 1.25rem;}
.search-box input{flex:1;border:none;outline:none;font-family:'Sora',sans-serif;font-size:1.05rem;padding:.7rem 0;color:var(--text);}
.search-box input::placeholder{color:var(--muted);}
.search-box button{background:none;border:none;cursor:pointer;font-size:1.2rem;color:var(--muted);}
.search-results{padding:0 1.25rem 1.25rem;max-height:55vh;overflow-y:auto;}
.search-result-item{padding:.9rem 0;border-top:1px solid var(--border);}
.search-result-item a{font-weight:600;font-size:.9rem;color:var(--navy);display:block;margin-bottom:.2rem;}
.search-result-item a:hover{color:var(--teal);}
.search-result-item p{font-size:.78rem;color:var(--muted);}
.search-no-results{padding:1rem 0;font-size:.88rem;color:var(--muted);}

/* ── Footer ── */
.site-footer{background:var(--navy);padding:3rem 0;}
.footer-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1.5rem;}
.footer-logo{font-size:.95rem;font-weight:600;color:#fff;letter-spacing:-.02em;display:flex;align-items:center;gap:.4rem;}
.footer-links{display:flex;gap:1.75rem;list-style:none;flex-wrap:wrap;}
.footer-links a{font-size:.72rem;color:rgba(255,255,255,.32);letter-spacing:.03em;transition:color .14s;}
.footer-links a:hover{color:rgba(255,255,255,.78);}
.footer-copy{font-size:.68rem;color:rgba(255,255,255,.2);text-align:right;}

/* ── Cookie banner ── */
.cookie-banner{position:fixed;bottom:1.5rem;left:1.5rem;right:1.5rem;z-index:999;background:var(--navy);color:rgba(255,255,255,.75);border-radius:var(--radius);padding:1.25rem 1.75rem;display:flex;align-items:center;justify-content:space-between;gap:1.5rem;flex-wrap:wrap;box-shadow:0 8px 40px rgba(0,0,0,.35);transform:translateY(120px);opacity:0;transition:transform .35s ease,opacity .35s ease;}
.cookie-banner.show{transform:translateY(0);opacity:1;}
.cookie-banner p{font-size:.8rem;line-height:1.6;max-width:560px;}
.cookie-banner a{color:var(--teal);text-decoration:underline;}
.cookie-btns{display:flex;gap:.75rem;flex-shrink:0;}

/* ── Pagination ── */
.pagination{display:flex;gap:.5rem;justify-content:center;margin-top:3rem;}
.pagination a,.pagination span{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:8px;font-size:.82rem;font-weight:500;border:1px solid var(--border);color:var(--muted);transition:background .14s,color .14s,border-color .14s;}
.pagination a:hover{background:var(--navy);color:#fff;border-color:var(--navy);}
.pagination span.current{background:var(--teal);color:var(--navy);border-color:var(--teal);font-weight:700;}

/* ── Flash messages ── */
.flash{padding:.9rem 1.25rem;border-radius:8px;margin-bottom:1.5rem;font-size:.85rem;font-weight:500;}
.flash-success{background:rgba(0,201,167,.1);color:#00876f;border:1px solid rgba(0,201,167,.25);}
.flash-error{background:rgba(255,107,107,.1);color:#c0392b;border:1px solid rgba(255,107,107,.25);}

/* ── Article body ── */
.article-body h2{margin:2rem 0 .75rem;font-size:1.4rem;}
.article-body h3{margin:1.5rem 0 .5rem;font-size:1.1rem;}
.article-body p{margin-bottom:1.25rem;font-size:1rem;line-height:1.82;color:#3a4460;}
.article-body strong{color:var(--navy);}
.article-body ul,.article-body ol{margin:.75rem 0 1.25rem 1.5rem;}
.article-body li{margin-bottom:.45rem;font-size:.97rem;line-height:1.7;color:#3a4460;}
.article-body code{font-family:monospace;font-size:.85em;background:var(--surface);border:1px solid var(--border);border-radius:4px;padding:.1em .35em;}
.article-body pre{background:var(--navy);color:#cdd6f4;border-radius:var(--radius);padding:1.5rem;overflow-x:auto;margin:1.5rem 0;font-size:.85rem;line-height:1.65;}
.article-body blockquote{border-left:3px solid var(--teal);margin:1.5rem 0;padding:.75rem 1.5rem;background:rgba(0,201,167,.05);border-radius:0 8px 8px 0;}
.article-body blockquote p{margin:0;font-style:italic;color:var(--navy);}
.article-body a{color:var(--teal);text-decoration:underline;}

/* ── Animations ── */
@keyframes fadeUp{from{opacity:0;transform:translateY(18px);}to{opacity:1;transform:translateY(0);}}
.fade-up{opacity:0;animation:fadeUp .55s ease forwards;}
.delay-1{animation-delay:.1s;}.delay-2{animation-delay:.2s;}
.delay-3{animation-delay:.3s;}.delay-4{animation-delay:.4s;}

/* ── Pill nav bar ── */
.pills-bar{background:var(--surface);border-bottom:1px solid var(--border);overflow-x:auto;scrollbar-width:none;}
.pills-bar::-webkit-scrollbar{display:none;}
.pills-inner{display:flex;align-items:center;gap:.45rem;height:54px;padding:0 2.5rem;min-width:max-content;}

/* ── Responsive ── */
@media (max-width:960px){
    .container{padding:0 1.5rem;}
    .nav-links{display:none;}
    .burger{display:flex;}
    .nav-right .btn{display:none;}
    .footer-inner{flex-direction:column;text-align:center;}
    .footer-copy{text-align:center;}
    .footer-links{justify-content:center;}
    .pills-inner{padding:0 1.5rem;}
}
@media (max-width:600px){
    .section{padding:3rem 0;}
    h1{font-size:2rem;}
    .cookie-banner{flex-direction:column;align-items:flex-start;}
}

/* ── Grid utilities ── */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;}
@media (max-width:960px){
    .grid-3{grid-template-columns:1fr 1fr;}
    .grid-4{grid-template-columns:1fr 1fr;}
}
@media (max-width:560px){
    .grid-3,.grid-2{grid-template-columns:1fr;}
}

/* ── Featured card ── */
.featured-card{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--white);transition:box-shadow .2s;}
.featured-card:hover{box-shadow:var(--shadow-lg);}
.feat-vis{background:var(--navy);min-height:360px;position:relative;overflow:hidden;}
.feat-vis canvas{position:absolute;inset:0;width:100%;height:100%;}
.feat-body{padding:3rem;display:flex;flex-direction:column;justify-content:center;}
@media (max-width:960px){.featured-card{grid-template-columns:1fr;}.feat-vis{min-height:220px;}}

/* ── Topics grid item ── */
.topic-item{background:var(--white);padding:1.85rem 1.6rem;cursor:pointer;transition:background .15s;text-decoration:none;color:inherit;display:block;}
.topic-item:hover{background:var(--surface);}
.topic-item .carrow{font-size:.73rem;color:var(--teal);margin-top:.9rem;opacity:0;transition:opacity .15s,transform .15s;transform:translateX(-5px);display:block;}
.topic-item:hover .carrow{opacity:1;transform:translateX(0);}

/* ── Hero ── */
.hero-section{background:var(--navy);padding:7rem 0 6rem;position:relative;overflow:hidden;}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(0,201,167,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(0,201,167,.045) 1px,transparent 1px);background-size:56px 56px;pointer-events:none;}
.hero-glow{position:absolute;top:-140px;right:-80px;width:620px;height:620px;border-radius:50%;background:radial-gradient(circle,rgba(0,201,167,.13) 0%,transparent 68%);pointer-events:none;}
.hero-inner{max-width:740px;position:relative;z-index:1;}
.stat-row{display:flex;gap:3rem;flex-wrap:wrap;margin-top:4rem;padding-top:2.5rem;border-top:1px solid rgba(255,255,255,.07);}
.stat-n{font-size:1.65rem;font-weight:600;color:#fff;letter-spacing:-.04em;line-height:1;margin-bottom:.28rem;}
.stat-n em{color:var(--teal);font-style:normal;}
.stat-l{font-size:.73rem;color:rgba(255,255,255,.38);letter-spacing:.04em;}

/* ── Path banner ── */
.path-banner{background:var(--navy);border-radius:16px;padding:3.5rem;display:grid;grid-template-columns:1fr auto;gap:2.5rem;align-items:center;position:relative;overflow:hidden;}
.path-glow{position:absolute;right:-60px;top:-60px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(0,201,167,.13) 0%,transparent 65%);pointer-events:none;}
.path-step-pill{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.09);border-radius:8px;padding:.45rem .9rem;font-size:.73rem;font-weight:500;color:rgba(255,255,255,.5);display:flex;align-items:center;gap:.4rem;}
.path-step-n{width:17px;height:17px;border-radius:50%;background:var(--teal);color:var(--navy);font-size:.58rem;font-weight:700;display:inline-flex;align-items:center;justify-content:center;}
@media (max-width:960px){.path-banner{grid-template-columns:1fr;padding:2.5rem;}}

/* ── Newsletter box ── */
.nl-box{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:4rem;text-align:center;}
.nl-form-row{display:flex;max-width:410px;margin:0 auto;border:1.5px solid var(--border);border-radius:10px;overflow:hidden;box-shadow:0 2px 8px rgba(11,17,32,.04);}
.nl-form-row input{flex:1;padding:.85rem 1.1rem;border:none;background:var(--white);font-family:'Sora',sans-serif;font-size:.85rem;color:var(--text);outline:none;}
.nl-form-row input::placeholder{color:var(--muted);}
.nl-form-row button{background:var(--teal);color:var(--navy);border:none;padding:.85rem 1.35rem;font-family:'Sora',sans-serif;font-size:.78rem;font-weight:700;cursor:pointer;white-space:nowrap;letter-spacing:.02em;transition:opacity .15s;}
.nl-form-row button:hover{opacity:.84;}
@media (max-width:600px){.nl-box{padding:2.5rem 1.25rem;}}