/* =========================================================
   RegaPro — style.css
   Брэндийн өнгө: логоны хар хөх (navy) + ногоон
   ========================================================= */

:root {
    /* Brand */
    --navy-900: #081C29;
    --navy-800: #0C2839;   /* логоны "Rega" өнгө */
    --navy-700: #12344A;
    --navy-600: #1B4560;
    --green-700: #2E8B33;  /* логоны гүн ногоон */
    --green-500: #57A93A;  /* логоны цайвар ногоон */
    --green-400: #6CC04A;
    --slate-600: #33424C;
    --slate-500: #5B6B76;
    --mist: #AEC3CC;
    --line: #E2EAE4;
    --soft: #F4F7F5;
    --white: #FFFFFF;

    /* Semantic */
    --bg: var(--white);
    --text: var(--slate-600);
    --heading: var(--navy-800);
    --muted: var(--slate-500);
    --accent: var(--green-700);

    --font-head: 'Montserrat', 'Segoe UI', Arial, sans-serif;
    --font-body: 'Inter', 'Segoe UI', Arial, sans-serif;

    --radius: 14px;
    --radius-sm: 10px;
    --shadow-sm: 0 1px 2px rgba(12, 40, 57, .06), 0 2px 8px rgba(12, 40, 57, .05);
    --shadow-md: 0 10px 30px -12px rgba(12, 40, 57, .22);
    --header-h: 76px;
    --container: 1200px;
    --ease: cubic-bezier(.2, .7, .2, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) - 1px); -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
body.no-scroll { overflow: hidden; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; color: inherit; }
ul, ol { list-style: none; }

/* Хадгалсан хэл (EN) ачаалах хооронд монгол текст анивчихаас сэргийлнэ */
.lang-pending body { opacity: 0; animation: reveal-body 0s 1.2s forwards; }
@keyframes reveal-body { to { opacity: 1; } }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

.sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
    position: absolute; left: 16px; top: -60px; z-index: 2000;
    background: var(--green-700); color: #fff; padding: 10px 16px; border-radius: 8px;
    font-weight: 600; transition: top .2s;
}
.skip-link:focus { top: 12px; }

:focus-visible { outline: 3px solid var(--green-500); outline-offset: 3px; border-radius: 6px; }

/* ---------- Typography ---------- */
h1, h2, h3 { font-family: var(--font-head); color: var(--heading); line-height: 1.15; letter-spacing: -0.01em; }
h3 { font-size: 1.125rem; font-weight: 700; }

.eyebrow {
    display: inline-flex; align-items: center; gap: 10px;
    font-family: var(--font-head);
    font-size: .8rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
    color: var(--green-700);
    margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 28px; height: 2px; background: currentColor; border-radius: 2px; }
.eyebrow--light { color: var(--green-400); }
.hero .eyebrow::before { display: none; }
.eyebrow-dot {
    width: 8px; height: 8px; border-radius: 50%; background: var(--green-400);
    box-shadow: 0 0 0 4px rgba(108, 192, 74, .25);
}

.section { padding: 110px 0; }
.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section-head .eyebrow { justify-content: center; }
.section-title { font-size: clamp(1.9rem, 3.4vw, 2.75rem); font-weight: 800; margin-bottom: 16px; }
.section-sub { font-size: 1.075rem; color: var(--muted); }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    min-height: 50px; padding: 12px 28px;
    border-radius: var(--radius-sm); border: 2px solid transparent;
    font-family: var(--font-head); font-weight: 700; font-size: .95rem; letter-spacing: .02em;
    cursor: pointer; text-align: center;
    transition: transform .2s var(--ease), background-color .2s, border-color .2s, color .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--green-700); color: #fff; box-shadow: 0 8px 20px -8px rgba(46, 139, 51, .7); }
.btn-primary:hover { background: #267A2B; }
.btn-ghost { border-color: rgba(255, 255, 255, .55); color: #fff; }
.btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, .08); }
.btn-sm { min-height: 42px; padding: 8px 18px; font-size: .875rem; }
.btn-block { width: 100%; }

/* =========================================================
   HEADER
   ========================================================= */
.site-header {
    position: fixed; inset: 0 0 auto 0; z-index: 1000;
    height: var(--header-h);
    background: linear-gradient(180deg, rgba(8, 28, 41, .55), rgba(8, 28, 41, 0));
    transition: background-color .3s, box-shadow .3s, backdrop-filter .3s;
}
.site-header.is-scrolled {
    background: rgba(255, 255, 255, .94);
    -webkit-backdrop-filter: saturate(160%) blur(12px);
    backdrop-filter: saturate(160%) blur(12px);
    box-shadow: 0 1px 0 var(--line), 0 6px 20px -12px rgba(12, 40, 57, .25);
}
.header-inner { height: 100%; display: flex; align-items: center; gap: 28px; }

.brand { display: block; flex-shrink: 0; position: relative; height: 44px; }
.brand-logo { height: 44px; width: auto; transition: opacity .3s; }
.brand-logo--dark { position: absolute; inset: 0 auto auto 0; opacity: 0; }
.is-scrolled .brand-logo--light { opacity: 0; }
.is-scrolled .brand-logo--dark { opacity: 1; }

.main-nav { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.nav-link {
    position: relative; padding: 8px 12px;
    font-family: var(--font-head); font-size: .9rem; font-weight: 600;
    color: rgba(255, 255, 255, .92); white-space: nowrap;
    transition: color .2s;
}
.nav-link::after {
    content: ""; position: absolute; left: 12px; right: 12px; bottom: 2px; height: 2px;
    background: var(--green-400); border-radius: 2px;
    transform: scaleX(0); transform-origin: left; transition: transform .25s var(--ease);
}
.nav-link:hover::after, .nav-link.is-current::after { transform: scaleX(1); }
.nav-link:hover { color: #fff; }
.is-scrolled .nav-link { color: var(--navy-800); }
.is-scrolled .nav-link:hover { color: var(--green-700); }
.is-scrolled .nav-link::after { background: var(--green-700); }
.nav-cta { margin-left: 8px; }

.header-actions { display: flex; align-items: center; gap: 12px; }

/* Хэл солих товч */
.lang-switch {
    display: inline-flex; padding: 3px; gap: 2px;
    border-radius: 999px;
    background: rgba(255, 255, 255, .12);
    border: 1px solid rgba(255, 255, 255, .28);
}
.lang-btn {
    min-width: 42px; height: 32px; padding: 0 10px;
    border: 0; border-radius: 999px; background: transparent; cursor: pointer;
    font-family: var(--font-head); font-size: .78rem; font-weight: 700; letter-spacing: .06em;
    color: rgba(255, 255, 255, .85);
    transition: background-color .2s, color .2s;
}
.lang-btn:hover { color: #fff; }
.lang-btn.is-active { background: #fff; color: var(--navy-800); }
.is-scrolled .lang-switch { background: var(--soft); border-color: var(--line); }
.is-scrolled .lang-btn { color: var(--slate-500); }
.is-scrolled .lang-btn:hover { color: var(--navy-800); }
.is-scrolled .lang-btn.is-active { background: var(--navy-800); color: #fff; }

/* Hamburger */
.nav-toggle {
    display: none; width: 44px; height: 44px; border: 0; background: transparent; cursor: pointer;
    position: relative; border-radius: 10px;
}
.nav-toggle span {
    position: absolute; left: 11px; right: 11px; height: 2px; border-radius: 2px; background: #fff;
    transition: transform .3s var(--ease), opacity .2s, background-color .3s;
}
.nav-toggle span:nth-child(1) { top: 15px; }
.nav-toggle span:nth-child(2) { top: 21px; }
.nav-toggle span:nth-child(3) { top: 27px; }
.is-scrolled .nav-toggle span { background: var(--navy-800); }
.menu-open .nav-toggle span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-open .nav-toggle span:nth-child(2) { opacity: 0; }
.menu-open .nav-toggle span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* =========================================================
   HERO
   ========================================================= */
.hero {
    position: relative; isolation: isolate;
    min-height: 100vh; min-height: 100svh;
    display: flex; flex-direction: column; justify-content: flex-end;
    padding: calc(var(--header-h) + 48px) 0 48px;
    color: #fff; background: var(--navy-900);
    overflow: hidden;
}
.hero-slides { position: absolute; inset: 0; z-index: -2; }
.hero-slide {
    position: absolute; inset: 0;
    background-size: cover; background-position: center right;
    opacity: 0; transform: scale(1.06);
    transition: opacity 1.4s ease, transform 7.5s linear;
}
.hero-slide.is-active { opacity: 1; transform: scale(1); }
.hero-overlay {
    position: absolute; inset: 0; z-index: -1;
    background:
        linear-gradient(90deg, rgba(8, 28, 41, .94) 0%, rgba(8, 28, 41, .82) 34%, rgba(8, 28, 41, .35) 62%, rgba(8, 28, 41, .15) 100%),
        linear-gradient(0deg, rgba(8, 28, 41, .95) 0%, rgba(8, 28, 41, .55) 22%, rgba(8, 28, 41, 0) 45%);
}

.hero-inner { position: relative; flex: 1; display: flex; flex-direction: column; justify-content: center; }
.hero-content { max-width: 780px; padding: 24px 0 40px; }

.hero-title {
    color: #fff;
    font-size: clamp(2.1rem, 4.4vw, 3.6rem);
    font-weight: 800; line-height: 1.05; letter-spacing: -0.015em;
    text-transform: uppercase;
    margin-bottom: 22px;
}
.hero-title .accent { color: var(--green-400); }

.hero-lead { font-size: clamp(1.05rem, 1.6vw, 1.25rem); color: rgba(255, 255, 255, .88); max-width: 560px; margin-bottom: 24px; }

.hero-checks { display: grid; gap: 10px; margin-bottom: 34px; }
.hero-checks li {
    position: relative; padding-left: 32px;
    font-size: 1rem; font-weight: 500; color: rgba(255, 255, 255, .95);
}
.hero-checks li::before {
    content: ""; position: absolute; left: 0; top: .2em;
    width: 20px; height: 20px; border-radius: 50%;
    background: var(--green-700) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 12.5 4 4 8-9'/%3E%3C/svg%3E") center / 13px no-repeat;
}

.hero-buttons { display: flex; flex-wrap: wrap; gap: 14px; }

.hero-dots { display: flex; gap: 8px; margin-bottom: 28px; }
.hero-dot {
    width: 28px; height: 4px; padding: 0; border: 0; border-radius: 4px; cursor: pointer;
    background: rgba(255, 255, 255, .35); position: relative;
    transition: width .3s var(--ease), background-color .3s;
}
.hero-dot::before { content: ""; position: absolute; inset: -10px 0; }  /* дарах талбай томруулах */
.hero-dot.is-active { width: 48px; background: var(--green-400); }

/* Давуу талын зурвас */
.feature-strip {
    display: grid; grid-template-columns: repeat(6, 1fr);
    background: rgba(8, 28, 41, .62);
    -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: var(--radius);
    overflow: hidden;
}
.feature {
    padding: 26px 18px 24px; text-align: center;
    border-left: 1px solid rgba(255, 255, 255, .1);
    transition: background-color .25s;
}
.feature:first-child { border-left: 0; }
.feature:hover { background: rgba(46, 139, 51, .14); }
.feature-icon {
    width: 40px; height: 40px; margin: 0 auto 14px;
    fill: none; stroke: var(--green-400); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round;
}
.feature h3 {
    color: #fff; font-size: .82rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase;
    line-height: 1.3; margin-bottom: 8px;
}
.feature p { font-size: .86rem; line-height: 1.5; color: rgba(255, 255, 255, .75); }

/* =========================================================
   WORKFLOW (логоны Collect → Submit → Analyze → Share)
   ========================================================= */
.workflow { background: var(--white); padding-bottom: 90px; }
.steps {
    position: relative;
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px;
    counter-reset: step;
}
.steps::before {  /* холбогч шугам */
    content: ""; position: absolute; top: 44px; left: 12.5%; right: 12.5%; height: 2px;
    background: repeating-linear-gradient(90deg, var(--mist) 0 8px, transparent 8px 14px);
    z-index: 0;
}
.step { position: relative; text-align: center; padding: 0 6px; }
.step-icon {
    position: relative; z-index: 1;
    width: 88px; height: 88px; margin: 0 auto 22px;
    display: grid; place-items: center;
    border-radius: 50%; background: #fff;
    border: 2px solid var(--green-700);
    box-shadow: 0 0 0 8px #fff, var(--shadow-md);
    transition: background-color .3s, transform .3s var(--ease);
}
.step-icon svg { width: 36px; height: 36px; fill: none; stroke: var(--green-700); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; transition: stroke .3s; }
.step:hover .step-icon { background: var(--green-700); transform: translateY(-4px); }
.step:hover .step-icon svg { stroke: #fff; }
.step-num {
    display: block; font-family: var(--font-head); font-size: .78rem; font-weight: 800;
    letter-spacing: .16em; color: var(--green-700); margin-bottom: 6px;
}
.step h3 { font-size: 1.2rem; margin-bottom: 10px; }
.step p { font-size: .95rem; color: var(--muted); }

.tagline {
    margin-top: 64px; text-align: center;
    font-family: var(--font-head); font-weight: 700; font-size: clamp(.8rem, 1.4vw, 1rem);
    letter-spacing: .32em; color: var(--navy-800);
    display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 6px 18px;
}
.tagline i { width: 6px; height: 6px; border-radius: 50%; background: var(--green-500); display: inline-block; }

/* =========================================================
   SERVICES
   ========================================================= */
.services { background: var(--soft); }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service {
    position: relative; overflow: hidden;
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 32px 28px 30px;
    box-shadow: var(--shadow-sm);
    transition: transform .3s var(--ease), box-shadow .3s, border-color .3s;
}
.service::after {
    content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
    background: linear-gradient(180deg, var(--green-500), var(--green-700));
    transform: scaleY(0); transform-origin: top; transition: transform .35s var(--ease);
}
.service:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #D3E3D6; }
.service:hover::after { transform: scaleY(1); }
.service-icon {
    width: 54px; height: 54px; border-radius: 12px; margin-bottom: 20px;
    display: grid; place-items: center;
    background: rgba(46, 139, 51, .1);
}
.service-icon svg { width: 28px; height: 28px; fill: none; stroke: var(--green-700); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.service h3 { margin-bottom: 10px; }
.service p { font-size: .96rem; color: var(--muted); }

/* =========================================================
   ABOUT
   ========================================================= */
.about {
    background:
        radial-gradient(900px 500px at 100% 0%, rgba(87, 169, 58, .14), transparent 60%),
        var(--navy-800);
    color: rgba(255, 255, 255, .82);
}
.about-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 64px; align-items: center; }
.about .section-title { color: #fff; }
.about-text > p { font-size: 1.05rem; margin-bottom: 16px; }
.tech-label {
    margin-top: 30px; margin-bottom: 12px;
    font-family: var(--font-head); font-size: .78rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
    color: var(--mist);
}
.tech-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tech-list li {
    padding: 6px 14px; border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, .18); background: rgba(255, 255, 255, .05);
    font-size: .86rem; font-weight: 500; color: #fff;
}
.about-media { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: 0 30px 60px -25px rgba(0, 0, 0, .6); }
.about-media > img { width: 100%; height: auto; aspect-ratio: 3 / 2; object-fit: cover; }
.about-media figcaption {
    position: absolute; left: 16px; right: 16px; bottom: 16px;
    display: flex; align-items: center; gap: 14px;
    padding: 12px 16px; border-radius: 12px;
    background: rgba(255, 255, 255, .95); color: var(--navy-800);
    font-family: var(--font-head); font-size: .72rem; font-weight: 700; letter-spacing: .18em;
}
.about-media figcaption img { width: 32px; height: auto; flex-shrink: 0; }

/* =========================================================
   CONTACT
   ========================================================= */
.contact { background: var(--white); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 64px; align-items: start; }
.contact-info .section-sub { margin-bottom: 32px; }
.contact-list { display: grid; gap: 18px; }
.contact-list li { display: flex; align-items: center; gap: 16px; }
.contact-ico {
    width: 48px; height: 48px; flex-shrink: 0; border-radius: 12px;
    display: grid; place-items: center; background: var(--soft); border: 1px solid var(--line);
}
.contact-ico svg { width: 22px; height: 22px; fill: none; stroke: var(--green-700); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.contact-list small { display: block; font-size: .78rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.contact-list a, .contact-list span { font-weight: 600; color: var(--navy-800); }
.contact-list a:hover { color: var(--green-700); }

.contact-form {
    display: grid; gap: 18px;
    background: var(--soft); border: 1px solid var(--line); border-radius: 18px;
    padding: 36px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.contact-form label { display: grid; gap: 6px; }
.contact-form label > span { font-size: .86rem; font-weight: 600; color: var(--navy-800); }
.contact-form input, .contact-form textarea {
    width: 100%; padding: 13px 15px;
    background: #fff; border: 1px solid #D5DFD8; border-radius: 10px;
    font-size: 1rem; color: var(--navy-800);
    transition: border-color .2s, box-shadow .2s;
}
.contact-form textarea { resize: vertical; min-height: 130px; }
.contact-form input::placeholder, .contact-form textarea::placeholder { color: #8C9AA3; }
.contact-form input:focus, .contact-form textarea:focus {
    outline: none; border-color: var(--green-700); box-shadow: 0 0 0 4px rgba(46, 139, 51, .15);
}
.form-note { font-size: .82rem; color: var(--muted); text-align: center; }
.form-status { font-size: .9rem; font-weight: 600; text-align: center; min-height: 1px; }
.form-status.is-error { color: #B42318; }
.form-status.is-ok { color: var(--green-700); }

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer { background: var(--navy-900); color: rgba(255, 255, 255, .7); padding: 64px 0 28px; }
.footer-grid { display: flex; justify-content: space-between; align-items: flex-start; gap: 40px; flex-wrap: wrap; }
.footer-brand img { height: 40px; width: auto; margin-bottom: 16px; }
.footer-brand p { max-width: 380px; font-size: .95rem; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 10px 28px; padding-top: 8px; }
.footer-nav a { font-family: var(--font-head); font-weight: 600; font-size: .9rem; color: rgba(255, 255, 255, .85); }
.footer-nav a:hover { color: var(--green-400); }
.footer-bottom {
    display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap;
    margin-top: 44px; padding-top: 24px; border-top: 1px solid rgba(255, 255, 255, .1);
    font-size: .85rem;
}
.footer-tagline { font-family: var(--font-head); font-weight: 700; letter-spacing: .22em; font-size: .72rem; color: var(--mist); }

/* =========================================================
   EXPERIENCE — Ажлын туршлага, галерей
   ========================================================= */
.experience { background: var(--white); }

.project-card {
    display: grid; grid-template-columns: 1.1fr 1fr; gap: 16px 48px; align-items: center;
    padding: 32px 36px; margin-bottom: 36px;
    border-radius: 18px;
    background:
        radial-gradient(600px 300px at 100% 0%, rgba(87, 169, 58, .18), transparent 60%),
        var(--navy-800);
    color: rgba(255, 255, 255, .85);
}
.project-label {
    font-family: var(--font-head); font-size: .74rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase;
    color: var(--green-400); margin-bottom: 8px;
}
.project-head h3 { color: #fff; font-size: 1.35rem; line-height: 1.3; margin-bottom: 16px; }
.project-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.project-tags li {
    padding: 4px 12px; border-radius: 999px; font-size: .8rem; font-weight: 500;
    border: 1px solid rgba(255, 255, 255, .2); background: rgba(255, 255, 255, .06); color: #fff;
}
.project-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.project-stats div {
    padding: 16px 12px; border-radius: 12px; text-align: center;
    background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .1);
}
.project-stats dt { font-family: var(--font-head); font-weight: 800; font-size: 1.7rem; line-height: 1.1; color: #fff; }
.project-stats dd { font-size: .8rem; line-height: 1.35; color: var(--mist); margin-top: 6px; }
.project-note { grid-column: 1 / -1; font-size: .78rem; color: var(--mist); text-align: right; margin-top: -4px; }

.work-filters { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-bottom: 28px; }
.work-filter {
    padding: 9px 18px; border-radius: 999px; cursor: pointer;
    border: 1px solid var(--line); background: var(--soft);
    font-family: var(--font-head); font-size: .86rem; font-weight: 700; color: var(--slate-500);
    transition: background-color .2s, color .2s, border-color .2s;
}
.work-filter:hover { color: var(--navy-800); border-color: #CBD8CF; }
.work-filter.is-active { background: var(--navy-800); border-color: var(--navy-800); color: #fff; }

.work-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
    grid-auto-flow: dense;
}
.work-item { display: flex; flex-direction: column; min-width: 0; }
.work-item[hidden] { display: none; }
.work-item--feature { grid-column: span 2; grid-row: span 2; }
.work-thumb {
    position: relative; display: block; width: 100%; padding: 0; border: 0; cursor: zoom-in;
    aspect-ratio: 16 / 9; overflow: hidden;
    border-radius: var(--radius);
    background: #1C2632;   /* dashboard-ийн өнгөтэй ойр */
    box-shadow: var(--shadow-sm);
}
.work-item--feature .work-thumb { flex: 1; aspect-ratio: auto; min-height: 280px; }
.work-thumb img {
    position: absolute; inset: 0; width: 100%; height: 100%;
    object-fit: cover; object-position: left top;
    transition: transform .5s var(--ease);
}
.work-item--feature .work-thumb img { object-fit: cover; object-position: top left; padding: 0; }
.work-item--alt { grid-column: 2 / span 2; }
.work-thumb::after {
    content: ""; position: absolute; inset: 0; border-radius: inherit;
    box-shadow: inset 0 0 0 1px rgba(12, 40, 57, .08);
    background: linear-gradient(180deg, transparent 55%, rgba(8, 28, 41, .35));
    opacity: 0; transition: opacity .3s;
}
.work-zoom {
    position: absolute; right: 12px; bottom: 12px; z-index: 1;
    width: 40px; height: 40px; border-radius: 50%;
    display: grid; place-items: center;
    background: var(--green-700); color: #fff;
    opacity: 0; transform: translateY(6px) scale(.9);
    transition: opacity .25s, transform .25s var(--ease);
}
.work-zoom svg { width: 20px; height: 20px; fill: none; stroke: #fff; stroke-width: 2; stroke-linecap: round; }
.work-thumb:hover img, .work-thumb:focus-visible img { transform: scale(1.035); }
.work-thumb:hover::after, .work-thumb:focus-visible::after { opacity: 1; }
.work-thumb:hover .work-zoom, .work-thumb:focus-visible .work-zoom { opacity: 1; transform: none; }

.work-item figcaption { padding: 14px 4px 0; display: grid; gap: 4px; }
.work-tag {
    justify-self: start;
    font-family: var(--font-head); font-size: .68rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
    color: var(--green-700);
}
.work-item figcaption strong { font-family: var(--font-head); font-size: 1rem; line-height: 1.3; color: var(--navy-800); }
.work-desc { font-size: .9rem; line-height: 1.5; color: var(--muted); }
.work-item:not(.work-item--feature) .work-desc {
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

.work-more { display: flex; justify-content: center; margin-top: 36px; }
.work-more[hidden] { display: none; }
.work-more-btn {
    min-height: 48px; padding: 10px 26px; border-radius: 999px; cursor: pointer;
    border: 2px solid var(--navy-800); background: transparent; color: var(--navy-800);
    font-family: var(--font-head); font-weight: 700; font-size: .92rem;
    transition: background-color .2s, color .2s;
}
.work-more-btn:hover { background: var(--navy-800); color: #fff; }

/* ---------- Lightbox ---------- */
.lightbox { position: fixed; inset: 0; z-index: 3000; display: grid; place-items: center; }
.lightbox[hidden] { display: none; }
.lb-backdrop { position: absolute; inset: 0; background: rgba(5, 16, 24, .96); animation: lb-fade .25s ease; }
.lb-body {
    position: relative; width: min(1400px, 100%); height: 100%;
    display: grid; grid-template-rows: auto 1fr auto; gap: 12px;
    padding: 16px 20px 24px; color: #fff;
    animation: lb-fade .25s ease;
}
@keyframes lb-fade { from { opacity: 0; } to { opacity: 1; } }
.lb-top { display: flex; justify-content: space-between; align-items: center; }
.lb-count { font-family: var(--font-head); font-weight: 700; font-size: .85rem; letter-spacing: .1em; color: var(--mist); }
.lb-stage { position: relative; display: grid; place-items: center; min-height: 0; padding: 0 68px; }
.lb-img {
    max-width: 100%; object-fit: contain;
    max-height: calc(100vh - 210px); max-height: calc(100dvh - 210px);
    border-radius: 10px; box-shadow: 0 30px 80px -20px rgba(0, 0, 0, .8);
    background: #1C2632;
    user-select: none; -webkit-user-drag: none;
}
.lb-btn {
    width: 48px; height: 48px; border-radius: 50%; cursor: pointer;
    display: grid; place-items: center;
    border: 1px solid rgba(255, 255, 255, .2); background: rgba(255, 255, 255, .08);
    transition: background-color .2s, border-color .2s;
}
.lb-btn:hover { background: var(--green-700); border-color: var(--green-700); }
.lb-btn svg { width: 22px; height: 22px; fill: none; stroke: #fff; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.lb-prev, .lb-next { position: absolute; top: 50%; transform: translateY(-50%); z-index: 1; }
.lb-prev { left: 0; }
.lb-next { right: 0; }
.lb-caption { text-align: center; max-width: 760px; margin: 0 auto; display: grid; gap: 4px; justify-items: center; }
.lb-tag { color: var(--green-400); }
.lb-title { color: #fff; font-size: 1.15rem; }
.lb-desc { font-size: .92rem; color: rgba(255, 255, 255, .75); }

@media (max-width: 1080px) {
    .project-card { grid-template-columns: 1fr; }
}
@media (max-width: 980px) {
    .work-grid { grid-template-columns: repeat(2, 1fr); }
    .work-item--feature, .work-item--alt { grid-column: 1 / -1; grid-row: auto; }
    .work-item--feature .work-thumb { aspect-ratio: 16 / 9; min-height: 0; flex: none; }
}
@media (max-width: 640px) {
    .project-card { padding: 24px 18px; }
    .project-stats { grid-template-columns: repeat(2, 1fr); }
    .project-note { text-align: left; }
    .work-grid { grid-template-columns: 1fr; gap: 24px; }
    .work-zoom { opacity: 1; transform: none; width: 34px; height: 34px; }
    .lb-body { padding: 12px 10px 18px; }
    .lb-prev, .lb-next { top: auto; bottom: -8px; transform: none; width: 44px; height: 44px; }
    .lb-stage { padding: 0 0 56px; }
    .lb-img { max-height: calc(100vh - 250px); max-height: calc(100dvh - 250px); }
    .lb-prev { left: calc(50% - 56px); }
    .lb-next { right: calc(50% - 56px); }
}
@media (hover: none) { .work-zoom { opacity: 1; transform: none; } }

/* =========================================================
   SCROLL REVEAL
   ========================================================= */
.js-reveal .reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js-reveal .reveal.is-visible { opacity: 1; transform: none; }
.js-reveal .steps .reveal:nth-child(2), .js-reveal .service-grid .reveal:nth-child(3n+2) { transition-delay: .08s; }
.js-reveal .steps .reveal:nth-child(3), .js-reveal .service-grid .reveal:nth-child(3n+3) { transition-delay: .16s; }
.js-reveal .steps .reveal:nth-child(4) { transition-delay: .24s; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
    .hero-slide { transform: none !important; }
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1180px) {
    .nav-link { padding: 8px 9px; font-size: .86rem; }
}

@media (max-width: 1080px) {
    .feature-strip { grid-template-columns: repeat(3, 1fr); }
    .feature:nth-child(4) { border-left: 0; }
    .feature:nth-child(n+4) { border-top: 1px solid rgba(255, 255, 255, .1); }
    .service-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 980px) {
    :root { --header-h: 68px; }
    .brand, .brand-logo { height: 38px; }
    .nav-toggle { display: block; }
    .header-inner { gap: 12px; }
    .header-actions { margin-left: auto; }

    .main-nav {
        position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0;
        flex-direction: column; align-items: stretch; gap: 0;
        padding: 16px 24px 32px; margin: 0;
        background: #fff; overflow-y: auto;
        opacity: 0; visibility: hidden; transform: translateY(-8px);
        transition: opacity .25s, transform .25s var(--ease), visibility 0s .25s;
    }
    .menu-open .main-nav { opacity: 1; visibility: visible; transform: none; transition: opacity .25s, transform .25s var(--ease), visibility 0s; }
    .main-nav .nav-link {
        color: var(--navy-800); font-size: 1.1rem; padding: 16px 4px;
        border-bottom: 1px solid var(--line);
    }
    .main-nav .nav-link::after { display: none; }
    .main-nav .nav-link.is-current { color: var(--green-700); }
    .nav-cta { margin: 24px 0 0; min-height: 52px; font-size: 1rem; }

    /* Цэс нээлттэй үед header цагаан */
    .menu-open.site-header { background: #fff; box-shadow: 0 1px 0 var(--line); }
    .menu-open .brand-logo--light { opacity: 0; }
    .menu-open .brand-logo--dark { opacity: 1; }
    .menu-open .nav-toggle span { background: var(--navy-800); }
    .menu-open .lang-switch { background: var(--soft); border-color: var(--line); }
    .menu-open .lang-btn { color: var(--slate-500); }
    .menu-open .lang-btn.is-active { background: var(--navy-800); color: #fff; }

    .section { padding: 84px 0; }
    .steps { grid-template-columns: repeat(2, 1fr); row-gap: 48px; }
    .steps::before { display: none; }
    .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 44px; }
}

@media (max-width: 640px) {
    .container { padding: 0 16px; }
    .brand, .brand-logo { height: 34px; }
    .lang-btn { min-width: 38px; height: 30px; padding: 0 8px; }

    .hero { padding-top: calc(var(--header-h) + 28px); padding-bottom: 24px; }
    .hero-content { padding-bottom: 28px; }
    .hero-overlay {
        background:
            linear-gradient(180deg, rgba(8, 28, 41, .8) 0%, rgba(8, 28, 41, .86) 50%, rgba(8, 28, 41, .97) 100%);
    }
    .hero-slide { background-position: var(--pos-m, 70%) center; }
    .hero-title { line-height: 1.1; }
    .hero-checks li { font-size: .95rem; }
    .hero-buttons .btn { flex: 1 1 100%; }

    .feature-strip { grid-template-columns: repeat(2, 1fr); }
    .feature { padding: 20px 12px; border-left: 1px solid rgba(255, 255, 255, .1); }
    .feature:nth-child(odd) { border-left: 0; }
    .feature:nth-child(n+3) { border-top: 1px solid rgba(255, 255, 255, .1); }
    .feature-icon { width: 32px; height: 32px; margin-bottom: 10px; }
    .feature h3 { font-size: .74rem; }
    .feature p { font-size: .8rem; }

    .section { padding: 68px 0; }
    .section-head { margin-bottom: 40px; }
    .steps { grid-template-columns: 1fr; row-gap: 40px; }
    .service-grid { grid-template-columns: 1fr; gap: 16px; }
    .service { padding: 26px 22px; }
    .tagline { font-size: .68rem; letter-spacing: .12em; gap: 4px 10px; margin-top: 48px; }

    .form-row { grid-template-columns: 1fr; }
    .contact-form { padding: 24px 18px; }
    .about-media figcaption { left: 10px; right: 10px; bottom: 10px; padding: 10px 12px; gap: 10px; font-size: .58rem; letter-spacing: .1em; }
    .about-media figcaption img { width: 24px; }

    .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ---------- Advantages / comparison ---------- */
.advantages { background: var(--soft); }
.adv-pill { display: inline-block; padding: 6px 14px; border-radius: 999px; background: rgba(46,139,51,.1); color: var(--green-700); font-family: var(--font-head); font-size: .75rem; font-weight: 700; letter-spacing: .12em; margin-bottom: 14px; }
.adv-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; max-width: 1000px; margin: 0 auto; align-items: start; }
.adv-card { position: relative; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px 28px 20px; box-shadow: var(--shadow-sm); }
.adv-card--main { border: 2px solid var(--green-500); box-shadow: var(--shadow-md); }
.adv-card--other { background: #FAFBFA; }
.adv-card--other .adv-name, .adv-card--other .adv-text { color: var(--muted); }
.adv-badge { position: absolute; top: -13px; right: 22px; background: var(--green-700); color: #fff; font-family: var(--font-head); font-size: .7rem; font-weight: 700; letter-spacing: .1em; padding: 6px 12px; border-radius: 999px; }
.adv-name { font-family: var(--font-head); font-size: 1.6rem; font-weight: 800; color: var(--heading); margin: 0 0 4px; }
.adv-rega { color: var(--navy-800); } .adv-pro { color: var(--green-500); }
.adv-desc { color: var(--muted); margin: 0 0 18px; font-size: .95rem; }
.adv-list { list-style: none; margin: 0; padding: 0; }
.adv-row { display: flex; align-items: center; gap: 14px; padding: 14px 0; border-top: 1px solid var(--line); }
.adv-icon { flex: 0 0 38px; height: 38px; border-radius: var(--radius-sm); background: rgba(46,139,51,.1); display: grid; place-items: center; }
.adv-card--other .adv-icon { background: #EEF1F0; }
.adv-icon svg { width: 20px; height: 20px; fill: none; stroke: var(--green-700); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.adv-card--other .adv-icon svg { stroke: var(--muted); }
.adv-text { flex: 1; color: var(--text); font-size: .95rem; line-height: 1.4; }
.adv-status { flex: 0 0 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; }
.adv-status svg { width: 16px; height: 16px; fill: none; stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; }
.adv-status.is-yes { background: var(--green-500); } .adv-status.is-yes svg { stroke: #fff; }
.adv-status.is-muted { background: #E6EAE8; } .adv-status.is-muted svg { stroke: #8A979F; }
.adv-status.is-no { background: #FDE3E3; } .adv-status.is-no svg { stroke: #D64545; }
.adv-cta { text-align: center; margin-top: 44px; }
@media (max-width: 820px) {
    .adv-grid { grid-template-columns: 1fr; gap: 32px; }
    .adv-card { padding: 28px 20px 14px; }
}

/* Contact form: honeypot + sending state */
.form-hp { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; opacity: 0; }
.contact-form { position: relative; }
.contact-form button[disabled] { opacity: .7; cursor: wait; }
.form-status.is-ok { color: var(--green-700); }
.form-status.is-error { color: #B42318; }