/* Tehran Index — institutional design system */
:root{
  --bg:#0c0f13; --bg2:#11151b; --card:#151a21; --line:#232a33; --line2:#2e3742;
  --txt:#e9edf1; --muted:#9aa7b2; --dim:#65737f;
  --accent:#2e9e87; --gold:#c9a35a; --red:#b3565c;
  --serif:Georgia,'Times New Roman',serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--txt);font-family:var(--sans);line-height:1.55;font-size:15px}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1140px;margin:0 auto;padding:0 22px}

/* top ribbon */
.ribbon{border-bottom:1px solid var(--line);background:var(--bg2);font-size:.74rem;color:var(--dim);padding:6px 0}
.ribbon .wrap{display:flex;justify-content:space-between;gap:12px}

/* nav */
nav{position:sticky;top:0;background:rgba(12,15,19,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:50}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:58px}
.logo{font-family:var(--serif);font-weight:700;font-size:1.22rem;letter-spacing:.2px;color:var(--txt)}
.logo:hover{text-decoration:none}
.logo span{color:var(--gold)}
.nav-links{display:flex;gap:22px;align-items:center}
.nav-links a{color:var(--muted);font-size:.86rem;letter-spacing:.4px}
.nav-links a.active,.nav-links a:hover{color:var(--txt);text-decoration:none}
.btn{display:inline-block;padding:9px 18px;border-radius:6px;font-weight:600;font-size:.86rem;cursor:pointer;border:none;font-family:var(--sans)}
.btn-primary{background:var(--accent);color:#07251f}
.btn-primary:hover{filter:brightness(1.12);text-decoration:none}
.btn-ghost{border:1px solid var(--line2);color:var(--txt);background:transparent}
.btn-ghost:hover{border-color:var(--accent);text-decoration:none}

/* type */
h1{font-family:var(--serif);font-size:clamp(1.9rem,4.4vw,2.9rem);line-height:1.15;font-weight:700}
h2{font-family:var(--serif);font-size:1.5rem;margin-bottom:8px}
h3{font-size:1.02rem}
.kicker{color:var(--gold);font-size:.74rem;letter-spacing:2.4px;text-transform:uppercase;font-weight:700}
.lede{color:var(--muted);max-width:660px}
.rule{border-top:1px solid var(--line);margin:0}

/* sections */
section{padding:52px 0;border-bottom:1px solid var(--line)}
.sec-head{display:flex;justify-content:space-between;align-items:baseline;gap:14px;flex-wrap:wrap;margin-bottom:24px}

/* hero */
.hero{padding:64px 0 48px;border-bottom:1px solid var(--line)}
.hero .lede{font-size:1.08rem;margin:16px 0 26px}
.hero-note{margin-top:30px;color:var(--dim);font-size:.85rem;max-width:660px;border-left:2px solid var(--gold);padding-left:14px}

/* stat strip — real numbers only */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--bg2)}
.stat{padding:18px 20px;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat b{display:block;font-size:1.5rem;font-family:var(--serif);color:var(--txt)}
.stat span{font-size:.78rem;color:var(--dim);letter-spacing:.5px;text-transform:uppercase}

/* signal cards */
.cat-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:6px 0 18px}
.cat-tab{border:1px solid var(--line2);background:transparent;color:var(--muted);border-radius:99px;padding:6px 14px;font-size:.8rem;cursor:pointer;font-family:var(--sans)}
.cat-tab:hover{border-color:var(--accent);color:var(--txt)}
.cat-tab.active{background:var(--accent);border-color:var(--accent);color:#07251f;font-weight:600}
.signals{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:14px}
.sig{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:18px;display:flex;flex-direction:column;gap:7px;border-left:3px solid var(--line)}
.sig-meta{display:flex;justify-content:space-between;font-size:.74rem;color:var(--dim)}
.sig-cat{text-transform:uppercase;letter-spacing:1px;font-weight:700}
.sig h3{font-size:1rem;line-height:1.4;font-family:var(--serif)}
.sig .entity{font-size:.78rem;color:var(--dim)}
.sig p{color:var(--muted);font-size:.88rem;flex-grow:1}
.sig .src{font-size:.78rem}
.sig[data-cat="Funding"]{border-left-color:#2e9e87}.sig[data-cat="Funding"] .sig-cat{color:#2e9e87}
.sig[data-cat="Product"]{border-left-color:#4a90d9}.sig[data-cat="Product"] .sig-cat{color:#4a90d9}
.sig[data-cat="Regulation"]{border-left-color:#c9a35a}.sig[data-cat="Regulation"] .sig-cat{color:#c9a35a}
.sig[data-cat="Market"]{border-left-color:#9b6dd6}.sig[data-cat="Market"] .sig-cat{color:#9b6dd6}
.sig[data-cat="Company"]{border-left-color:#3bb0c9}.sig[data-cat="Company"] .sig-cat{color:#3bb0c9}
.sig[data-cat="Infrastructure"]{border-left-color:#d97f4a}.sig[data-cat="Infrastructure"] .sig-cat{color:#d97f4a}
.sig-empty{color:var(--dim);font-size:.9rem;padding:18px 2px}

/* directory (companies) */
.dir{border:1px solid var(--line);border-radius:10px;overflow:hidden}
.dir-row{display:grid;grid-template-columns:2.1fr 1.6fr 1fr 1fr .9fr;gap:10px;padding:14px 18px;border-bottom:1px solid var(--line);align-items:center}
.dir-row:last-child{border-bottom:none}
.dir-row:hover{background:var(--bg2)}
.dir-head{background:var(--bg2);font-size:.72rem;text-transform:uppercase;letter-spacing:1px;color:var(--dim);font-weight:700}
.co-name{font-weight:700;font-family:var(--serif);font-size:1.02rem}
.co-native{color:var(--dim);font-size:.84rem;margin-left:8px}
.dir-row .sector{color:var(--muted);font-size:.86rem}
.dir-row .city{color:var(--dim);font-size:.84rem}
.badge{display:inline-block;font-size:.7rem;padding:3px 10px;border-radius:99px;border:1px solid var(--line2);color:var(--muted);letter-spacing:.5px}
.badge.active{border-color:#2e9e8755;color:#2e9e87}
.badge.restricted{border-color:#b3565c66;color:#c98a8e}
@media(max-width:760px){.dir-row{grid-template-columns:1fr 1fr;row-gap:4px}}

/* cards & steps */
.cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:22px}
.card .tag{font-size:.7rem;letter-spacing:1.4px;text-transform:uppercase;color:var(--accent);font-weight:700}
.card h3{margin:8px 0 6px;font-family:var(--serif);font-size:1.12rem}
.card p{color:var(--muted);font-size:.9rem}
.card .price{margin-top:12px;color:var(--gold);font-size:.82rem;font-weight:600}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px}
.step{border-top:2px solid var(--gold);padding-top:14px}
.step .n{color:var(--gold);font-weight:700;font-size:.8rem}
.step h4{font-family:var(--serif);font-size:1.05rem;margin:4px 0 6px}
.step p{color:var(--muted);font-size:.88rem}

/* prose pages (methodology/about) */
.prose{max-width:760px}
.prose h2{margin:34px 0 10px}
.prose p{color:var(--muted);margin-bottom:14px}
.prose li{color:var(--muted);margin:6px 0 6px 18px}
.prose strong{color:var(--txt)}

/* subscribe */
.sub-box{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:34px;text-align:center;max-width:640px;margin:0 auto}
.sub-box h2{margin-bottom:6px}
.sub-box p{color:var(--muted);margin-bottom:20px}
.sub-form{display:flex;gap:10px;max-width:430px;margin:0 auto;flex-wrap:wrap;justify-content:center}
.sub-form input{flex:1;min-width:210px;padding:11px 15px;border-radius:6px;border:1px solid var(--line2);background:var(--bg);color:var(--txt);font-size:.92rem}
.sub-form input:focus{outline:none;border-color:var(--accent)}
.sub-msg{margin-top:12px;font-size:.85rem;color:var(--accent)}

/* footer */
footer{padding:40px 0 50px;color:var(--dim);font-size:.84rem}
.foot{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px}
.foot a{color:var(--muted)}
.disclaimer{margin-top:16px;font-size:.76rem;color:var(--dim);max-width:760px}
@media(max-width:680px){.nav-links a:not(.btn){display:none}}