/* =========================================================
   TG Bot Builder — design tokens
   Palette: midnight control-room + signal cyan + amber accent
   Type: Vazirmatn (fa/body) + Space Grotesk (latin display) + JetBrains Mono (numbers)
   ========================================================= */

@font-face {
    font-family: 'Vazirmatn';
    src: local('Vazirmatn');
    font-display: swap;
}

:root{
    --bg:#F7F9FC;
    --surface:#FFFFFF;
    --surface-2:#F0F3F8;
    --border:#E3E8F0;
    --text:#14202E;
    --text-muted:#5B6B82;
    --accent:#0EA5C4;
    --accent-strong:#0B8AA6;
    --accent-2:#C98A1F;
    --accent-2-bg:#FBEBD0;
    --success:#1F9D6D;
    --danger:#D6455A;
    --radius-sm:10px;
    --radius-md:16px;
    --radius-lg:26px;
    --shadow-sm:0 1px 2px rgba(20,32,46,.06), 0 1px 1px rgba(20,32,46,.04);
    --shadow-md:0 8px 24px rgba(20,32,46,.08);
    --shadow-lg:0 20px 50px rgba(20,32,46,.14);
    --container:1160px;
    --font-fa:'Vazirmatn', 'Segoe UI', Tahoma, sans-serif;
    --font-display:'Space Grotesk', var(--font-fa), sans-serif;
    --font-mono:'JetBrains Mono', ui-monospace, monospace;
}

[data-theme="dark"]{
    --bg:#0B1220;
    --surface:#121B2E;
    --surface-2:#16213A;
    --border:#223049;
    --text:#E7EDF5;
    --text-muted:#8CA0BE;
    --accent:#29C7E8;
    --accent-strong:#59DAF2;
    --accent-2:#F5B942;
    --accent-2-bg:#3A2C10;
    --success:#34D399;
    --danger:#F0687B;
    --shadow-sm:0 1px 2px rgba(0,0,0,.3);
    --shadow-md:0 10px 26px rgba(0,0,0,.35);
    --shadow-lg:0 24px 60px rgba(0,0,0,.5);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:var(--font-fa);
    line-height:1.7;
    transition:background .25s ease,color .25s ease;
    -webkit-font-smoothing:antialiased;
}
[dir="ltr"] body{ font-family:'Space Grotesk','Inter',sans-serif; }
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{font-family:var(--font-display);margin:0 0 .4em;line-height:1.25;font-weight:700}
p{margin:0 0 1em;color:var(--text-muted)}
button,input,textarea,select{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
@media (prefers-reduced-motion:reduce){ *{animation-duration:.001ms !important;transition-duration:.001ms !important} }

.container{max-width:var(--container);margin-inline:auto;padding-inline:20px}
.eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;
    color:var(--accent-strong);text-transform:uppercase;
    background:color-mix(in srgb, var(--accent) 12%, transparent);
    border:1px solid color-mix(in srgb, var(--accent) 30%, transparent);
    padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--success);box-shadow:0 0 0 0 rgba(52,211,153,.6);animation:pulse 2s infinite}
@keyframes pulse{
    0%{box-shadow:0 0 0 0 rgba(52,211,153,.55)}
    70%{box-shadow:0 0 0 8px rgba(52,211,153,0)}
    100%{box-shadow:0 0 0 0 rgba(52,211,153,0)}
}

/* ---------- Header ---------- */
.site-header{
    position:sticky;top:0;z-index:50;
    background:color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--border);
}
.site-header .inner{display:flex;align-items:center;justify-content:space-between;padding-block:16px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:19px}
.brand img{width:34px;height:34px;border-radius:9px}
.brand .brand-mark{
    width:34px;height:34px;border-radius:9px;
    background:linear-gradient(135deg,var(--accent),var(--accent-2));
    display:flex;align-items:center;justify-content:center;color:#0B1220;font-weight:800;
}
.main-nav{display:flex;align-items:center;gap:28px}
.main-nav a{color:var(--text-muted);font-weight:500;font-size:15px;transition:color .2s}
.main-nav a:hover,.main-nav a.active{color:var(--text)}
.header-actions{display:flex;align-items:center;gap:10px}
.icon-btn{
    width:38px;height:38px;border-radius:10px;border:1px solid var(--border);
    background:var(--surface);color:var(--text);display:flex;align-items:center;justify-content:center;
    cursor:pointer;transition:.2s;
}
.icon-btn:hover{border-color:var(--accent)}
.btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:11px 22px;border-radius:12px;font-weight:600;font-size:14.5px;
    border:1px solid transparent;cursor:pointer;transition:.2s;
}
.btn-primary{background:var(--accent);color:#06222B;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--accent-strong);transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:var(--border);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent)}
.nav-toggle{display:none}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding-block:96px 70px;border-bottom:1px solid var(--border)}
.hero-grid{position:absolute;inset:0;pointer-events:none;opacity:.5}
.hero-inner{position:relative;max-width:760px}
.hero h1{font-size:clamp(30px,5vw,54px);letter-spacing:-.02em}
.hero .lede{font-size:18px;max-width:600px}
.hero-cta{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.hero-signal{
    margin-top:56px;display:flex;align-items:center;gap:14px;
    font-family:var(--font-mono);font-size:13px;color:var(--text-muted);
}
.signal-bars{display:flex;align-items:flex-end;gap:3px;height:16px}
.signal-bars span{width:4px;background:var(--accent);border-radius:2px;animation:sig 1.2s ease-in-out infinite}
.signal-bars span:nth-child(1){height:40%;animation-delay:0s}
.signal-bars span:nth-child(2){height:70%;animation-delay:.15s}
.signal-bars span:nth-child(3){height:100%;animation-delay:.3s}
.signal-bars span:nth-child(4){height:55%;animation-delay:.45s}
@keyframes sig{0%,100%{opacity:.4;transform:scaleY(.6)}50%{opacity:1;transform:scaleY(1)}}

/* ---------- Sections ---------- */
.section{padding-block:76px}
.section-head{max-width:640px;margin-bottom:44px}
.section-head .eyebrow{margin-bottom:14px}
.section-head h2{font-size:clamp(24px,3.4vw,34px)}
.section-alt{background:var(--surface)}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-media{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);background:var(--surface-2);min-height:280px;display:flex;align-items:center;justify-content:center}

/* ---------- Plan cards ---------- */
.plans-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.plan-card{
    background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);
    padding:28px 24px;display:flex;flex-direction:column;gap:18px;position:relative;transition:.25s;
}
.plan-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.plan-card.featured{border-color:var(--accent-2);box-shadow:0 0 0 1px var(--accent-2), var(--shadow-lg)}
.plan-badge{
    position:absolute;top:-13px;inset-inline-start:24px;
    background:var(--accent-2);color:#3A2600;font-size:12px;font-weight:700;
    padding:4px 12px;border-radius:999px;font-family:var(--font-mono);
}
.plan-name{font-family:var(--font-display);font-weight:700;font-size:19px}
.plan-price-row{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.plan-price{font-family:var(--font-mono);font-size:28px;font-weight:700;color:var(--text)}
.plan-price-orig{font-family:var(--font-mono);font-size:14px;color:var(--text-muted);text-decoration:line-through}
.plan-discount-badge{
    background:var(--accent-2-bg);color:var(--accent-2);font-family:var(--font-mono);
    font-size:12px;padding:2px 9px;border-radius:8px;font-weight:700;
}
.plan-unit{font-size:13px;color:var(--text-muted)}
.plan-features{display:flex;flex-direction:column;gap:11px;flex:1}
.plan-feature{display:flex;align-items:center;gap:10px;font-size:14.5px}
.plan-feature .mark{
    width:20px;height:20px;border-radius:6px;display:flex;align-items:center;justify-content:center;flex:none;font-size:12px;
}
.plan-feature .mark.yes{background:color-mix(in srgb, var(--success) 18%, transparent);color:var(--success)}
.plan-feature .mark.no{background:color-mix(in srgb, var(--danger) 14%, transparent);color:var(--danger)}
.plan-feature .mark.num{background:color-mix(in srgb, var(--accent) 16%, transparent);color:var(--accent-strong);font-family:var(--font-mono);font-weight:700;width:auto;min-width:20px;padding-inline:5px}
.plan-feature span.label{color:var(--text)}

/* ---------- Tutorials ---------- */
.tutorials-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.tutorial-card{
    background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);
    overflow:hidden;display:flex;flex-direction:column;transition:.25s;
}
.tutorial-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.tutorial-thumb{aspect-ratio:16/9;background:var(--surface-2);display:flex;align-items:center;justify-content:center;color:var(--text-muted)}
.tutorial-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.tutorial-cat{font-family:var(--font-mono);font-size:11.5px;color:var(--accent-strong);text-transform:uppercase;letter-spacing:.05em}
.tutorial-title{font-size:18px;font-weight:700}
.tutorial-excerpt{font-size:14px;flex:1}
.tutorial-meta{display:flex;align-items:center;justify-content:space-between;margin-top:6px}
.stars{display:inline-flex;gap:2px;color:var(--accent-2)}
.stars .star{font-size:15px}
.rating-count{font-size:12.5px;color:var(--text-muted);font-family:var(--font-mono)}

/* single tutorial */
.tutorial-single{max-width:760px;margin-inline:auto}
.tutorial-single .tutorial-cover{border-radius:var(--radius-lg);overflow:hidden;margin-bottom:26px;border:1px solid var(--border)}
.tutorial-content{font-size:16.5px}
.tutorial-content p{color:var(--text)}
.rating-box{
    margin-top:44px;padding:26px;border-radius:var(--radius-md);background:var(--surface);
    border:1px solid var(--border);text-align:center;
}
.rating-stars-input{display:flex;justify-content:center;gap:6px;margin-block:14px;direction:ltr}
.rating-stars-input button{
    background:none;border:none;font-size:30px;cursor:pointer;color:var(--border);transition:.15s;line-height:1;
}
.rating-stars-input button.filled,.rating-stars-input button:hover,.rating-stars-input button:hover ~ button{color:var(--accent-2)}
.rating-feedback{font-size:14px;color:var(--text-muted);margin-top:8px}

/* ---------- FAQ ---------- */
.faq-list{max-width:760px;margin-inline:auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}
.faq-q{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    padding:18px 22px;cursor:pointer;font-weight:600;font-size:15.5px;
}
.faq-q .chev{transition:transform .2s;color:var(--accent-strong);flex:none}
.faq-item.open .faq-q .chev{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease}
.faq-a-inner{padding:0 22px 20px;color:var(--text-muted);font-size:14.5px}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--border);padding-block:50px 30px;background:var(--surface)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:36px}
.footer-brand p{max-width:320px}
.footer-col h4{font-size:14px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;font-family:var(--font-mono)}
.footer-col ul{display:flex;flex-direction:column;gap:10px;margin-top:14px}
.footer-col a{color:var(--text);font-size:14.5px}
.footer-col a:hover{color:var(--accent-strong)}
.footer-bottom{border-top:1px solid var(--border);padding-top:22px;display:flex;justify-content:space-between;color:var(--text-muted);font-size:13px;flex-wrap:wrap;gap:10px}

/* ---------- Utility / empty states ---------- */
.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted)}
.mono{font-family:var(--font-mono)}

/* ---------- Responsive ---------- */
@media (max-width:900px){
    .plans-grid{grid-template-columns:repeat(2,1fr)}
    .tutorials-grid{grid-template-columns:repeat(2,1fr)}
    .about-grid{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:680px){
    .main-nav{
        position:fixed;inset-inline-start:0;top:0;bottom:0;width:78%;max-width:320px;
        background:var(--surface);flex-direction:column;align-items:flex-start;
        padding:90px 26px 26px;gap:22px;border-inline-end:1px solid var(--border);
        transform:translateX(-105%);transition:transform .25s ease;z-index:60;
    }
    [dir="rtl"] .main-nav{transform:translateX(105%)}
    .main-nav.open{transform:translateX(0)}
    .nav-toggle{display:flex}
    .plans-grid{grid-template-columns:1fr}
    .tutorials-grid{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr}
    .hero{padding-block:60px 40px}
}