/* ============================================================
   Oshtree India — informational microsite
   Brand palette derived from Oshtree Training & Consultancy
   forest #458E48 · charcoal #4D4D4D · safety-yellow #FCDD09
   earth #A68059 · deep-green #2F6B32
   ============================================================ */
:root{
  --green:#458E48;        /* primary */
  --green-deep:#2F6B32;   /* hover/dark */
  --green-ink:#1e4a21;    /* headings alt */
  --yellow:#FCDD09;       /* CTA accents */
  --charcoal:#4D4D4D;
  --ink:#2b2b2b;
  --earth:#A68059;
  --paper:#ffffff;
  --mist:#f4f7f3;         /* very light green-tinted grey */
  --line:#e3e9e1;
  --shadow:0 10px 30px rgba(30,60,30,.08);
  --radius:14px;
  --maxw:1180px;
  --font:'Mona Sans','Segoe UI', system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--paper);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:clip}
img{max-width:100%;display:block}
a{color:var(--green-deep);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.hero .wrap > *, .about-grid > *, .contact-grid > *, .footer-grid > *{min-width:0}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.5rem;font-weight:700;font-size:1rem;padding:.8rem 1.5rem;border-radius:999px;cursor:pointer;transition:transform .15s ease, box-shadow .15s ease, background .15s ease;border:0;line-height:1.2}
.btn:hover{transform:translateY(-2px);text-decoration:none}
.btn-yellow{background:var(--yellow);color:#3a2f00;box-shadow:0 6px 18px rgba(252,221,9,.45)}
.btn-yellow:hover{background:#ffe63b;box-shadow:0 10px 22px rgba(252,221,9,.5)}
.btn-green{background:var(--green);color:#fff;box-shadow:0 6px 18px rgba(69,142,72,.35)}
.btn-green:hover{background:var(--green-deep)}
.btn-outline{background:transparent;color:var(--green-deep);border:2px solid var(--green);box-shadow:none}
.btn-outline:hover{background:var(--green);color:#fff}

/* ---------- header ---------- */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.7rem 0}
.brand{display:flex;align-items:center;gap:.65rem}
.brand img{height:46px;width:auto}
.brand > span{display:grid;min-width:0}
.brand-name{font-weight:800;line-height:1.05;white-space:nowrap}
.brand-name .osh{color:var(--charcoal)}
.brand-name .tree{color:var(--green)}
.brand-sub{font-size:.62rem;letter-spacing:.12em;color:var(--earth);text-transform:uppercase;font-weight:700}
.nav-links{display:flex;align-items:center;gap:1.4rem;list-style:none}
.nav-links a{color:var(--ink);font-weight:600;font-size:.98rem}
.nav-links a:hover{color:var(--green)}
.nav-cta{margin-left:.2rem}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:.35rem .55rem;font-size:1.2rem;cursor:pointer}

/* ---------- hero (half-height split slider) ---------- */
.hero{position:relative;overflow:hidden;background:
  radial-gradient(1100px 460px at 88% -12%, rgba(69,142,72,.15), transparent 60%),
  linear-gradient(180deg,#fbfdfb, #fff)}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(2rem,4vw,3.5rem);align-items:center;min-height:clamp(25rem,52vh,32rem);padding-top:2.5rem;padding-bottom:2.5rem}
/* left rotating area */
.hero-text{position:relative;min-height:clamp(15rem,30vh,22rem)}
.slide{opacity:0;position:absolute;inset:0 auto 0 0;width:100%;pointer-events:none;transition:opacity .55s ease, transform .55s ease;transform:translateY(10px)}
.slide.active{opacity:1;pointer-events:auto;transform:none;position:relative}
.eyebrow{display:inline-flex;align-items:center;gap:.45rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;font-size:.72rem;color:var(--green-deep);background:rgba(69,142,72,.1);border:1px solid rgba(69,142,72,.25);padding:.32rem .8rem;border-radius:999px;margin-bottom:1rem}
.hero h1{max-width:100%;font-size:clamp(1.7rem,3.9vw,3.05rem);line-height:1.1;color:var(--green-ink);overflow-wrap:break-word}
.hero h1 .hl{color:var(--green)}
.hero p.lede{margin:1rem 0 1.4rem;font-size:1.08rem;color:#4a5053;max-width:auto}
.hero-actions{display:flex;flex-wrap:wrap;gap:.9rem}
/* slider controls */
.hero-controls{display:flex;align-items:center;gap:1rem;margin-top:1.3rem}
.hero-dots{display:flex;gap:.5rem}
.hero-dot{width:26px;height:6px;border-radius:99px;border:0;cursor:pointer;background:#d3ddD1;transition:background .2s ease, width .2s ease;padding:0}
.hero-dot.active{background:var(--green);width:34px}
.hero-arrow{width:44px;height:44px;border-radius:50%;border:1px solid var(--green);background:#fff;color:var(--green);cursor:pointer;font-size:1.05rem;line-height:1;display:inline-flex;align-items:center;justify-content:center;transition:background .15s ease,color .15s ease}
.hero-arrow:hover{background:var(--green);color:#fff}
/* right media half */
.hero-media{position:relative;isolation:isolate;min-height:clamp(19rem,34vw,25rem);border-radius:20px;overflow:hidden;box-shadow:var(--shadow);background:linear-gradient(180deg,rgba(20,50,25,.02),rgba(12,39,18,.48)),url('../images/hero-safety.jpg') center/cover no-repeat}
.hero-media-caption{position:absolute;z-index:1;left:0;right:0;bottom:0;margin:0;padding:2.2rem 1.1rem .85rem;color:#fff;background:linear-gradient(transparent,rgba(12,39,18,.8));font-weight:700;font-size:.82rem;line-height:1.35}

/* ---------- trust / highlight bar ---------- */
.highlights{background:var(--green-ink);color:#fff}
.highlights .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:1.6rem;padding-top:1.7rem;padding-bottom:1.7rem}
.hl{display:flex;gap:.85rem;align-items:flex-start}
.hl .ic{font-size:1.7rem;line-height:1.1}
.hl h4{font-size:.98rem;margin-bottom:.15rem;color:#fff}
.hl p{font-size:.84rem;color:#cfe3cf;line-height:1.45}
.smallcaps{font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;font-weight:800;color:#a9cfaa;display:block;margin-bottom:.1rem}

/* ---------- sections ---------- */
section{padding:4.4rem 0;scroll-margin-top:80px}
.section-head{max-width:46rem;margin-bottom:2.6rem}
.kicker{color:var(--green-deep);font-weight:800;letter-spacing:.16em;text-transform:uppercase;font-size:.74rem}
.section-head h2{font-size:clamp(1.7rem,3.4vw,2.5rem);color:var(--green-ink);line-height:1.15;margin-top:.4rem}
.section-head p{margin-top:.7rem;color:#555a56;font-size:1.05rem}
.center{text-align:center;margin-left:auto;margin-right:auto}
.muted{color:#555a56}

/* about split */
.about{background:#fff}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:3.4rem;align-items:center}
.about-copy h2{font-size:clamp(1.7rem,3.2vw,2.35rem);color:var(--green-ink);line-height:1.16;margin:.5rem 0 1rem}
.about-copy p{margin-bottom:.9rem}
.about-copy ul{list-style:none;display:grid;gap:.55rem;margin:1.2rem 0}
.about-copy li{position:relative;padding-left:1.7rem;font-weight:500}
.about-copy li::before{content:"✦";position:absolute;left:0;color:var(--green);font-size:1rem;top:.05em}
.fact-card{background:var(--mist);border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem}
.fact-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1rem}
.fact{background:#fff;border:1px solid var(--line);border-radius:12px;padding:1rem 1.1rem;text-align:center}
.fact .n{font-size:1.7rem;font-weight:800;color:var(--green)}
.fact .l{font-size:.8rem;color:#666}

/* courses */
.courses{background:var(--mist)}
.course-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem}
.course-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.35rem 1.3rem;transition:transform .18s ease, box-shadow .18s ease;position:relative;overflow:hidden}
.course-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--green)}
.course-card:nth-child(4n+2)::before{background:var(--earth)}
.course-card:nth-child(4n+3)::before{background:var(--yellow)}
.course-card:nth-child(4n+4)::before{background:#4d9ec2}
.course-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.course-card .cat{font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;font-weight:800;color:var(--green-deep);display:block}
.course-card h4{margin:.4rem 0 .5rem;font-size:1.05rem;color:var(--green-ink);line-height:1.25}
.course-card p{font-size:.88rem;color:#5a605c}
.course-note{margin-top:2rem;font-size:.9rem;color:#5c635e;border-top:1px dashed var(--line);padding-top:1.2rem}

/* accreditation strip */
.accr{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.accr-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.4rem;align-items:center;text-align:center}
.accr-item .badge{font-size:1.9rem}
.accr-item h4{font-size:1rem;color:var(--green-ink);margin:.3rem 0 .2rem}
.accr-item p{font-size:.8rem;color:#777}

/* why */
.why{background:#fff}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem}
.why-item{background:var(--mist);border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem}
.why-item .ic{width:52px;height:52px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;background:var(--green);color:#fff;margin-bottom:.9rem}
.why-item:nth-child(2) .ic{background:var(--earth)}
.why-item:nth-child(3) .ic{background:var(--yellow);color:#3a2f00}
.why-item h4{color:var(--green-ink);font-size:1.08rem;margin-bottom:.4rem}
.why-item p{font-size:.92rem;color:#565b57}

/* contact */
.contact{background:linear-gradient(180deg,#fff, #f7f6f1)}
.contact-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:2.6rem;align-items:start}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.panel-head{background:var(--green-ink);color:#fff;padding:1rem 1.4rem;font-weight:700;display:flex;align-items:center;gap:.5rem}
.panel-body{padding:1.4rem}
.contact-line{display:flex;gap:.8rem;padding:.55rem 0;border-bottom:1px dashed var(--line)}
.contact-line:last-of-type{border-bottom:0}
.contact-line .ic{color:var(--green);font-size:1.15rem;width:1.3rem;text-align:center}
.contact-line h5{font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;color:#9a8373;font-weight:800}
.contact-line p{font-size:.98rem;color:var(--ink)}
.contact-line a{color:var(--green-deep);font-weight:600}
.field{margin-bottom:1rem}
.field label{display:block;font-weight:600;font-size:.86rem;margin-bottom:.3rem;color:#3f443f}
.field input,.field select,.field textarea{width:100%;padding:.66rem .8rem;border:1px solid #cfd8cc;border-radius:8px;font:inherit;font-size:.96rem;background:#fff}
.field textarea{resize:vertical;min-height:96px}
.field input:focus,.field textarea:focus{outline:2px solid rgba(69,142,72,.35);border-color:var(--green)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.form-success{display:none;background:#e7f4e7;color:#245c26;border:1px solid #bcddbb;padding:.9rem 1rem;border-radius:8px;margin-top:.6rem;font-weight:600}
.form-note{font-size:.78rem;color:#8a8f8b;margin-top:.7rem}
.map-embed{margin-top:2rem;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);line-height:0}
.map-embed iframe{width:100%;height:340px;border:0}

/* footer */
.footer{background:var(--green-ink);color:#cfe3cf;padding:2.6rem 0 2rem;margin-top:0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:2rem;padding-bottom:1.6rem;border-bottom:1px solid rgba(255,255,255,.12)}
.footer h5{color:#fff;font-size:.94rem;margin-bottom:.7rem}
.footer p,.footer a{font-size:.88rem;color:#bcd9bc;line-height:1.7}
.footer a:hover{color:#fff}
.footer-links{list-style:none}
.footer-links li{margin-bottom:.35rem}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:.5rem;padding-top:1.2rem;font-size:.8rem;color:#93b893}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .hero .wrap,.about-grid,.contact-grid{grid-template-columns:1fr;gap:2.25rem}
  .hero .wrap{min-height:0;padding-top:2rem;padding-bottom:2.25rem}
  .hero-media{order:-1;min-height:clamp(16rem,42vw,22rem);margin:0}
  .hero-text{min-height:20rem}
  .highlights .wrap{grid-template-columns:repeat(2,1fr)}
  .course-grid{grid-template-columns:repeat(2,1fr)}
  .why-grid{grid-template-columns:1fr 1fr}
  .accr-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .wrap{padding-left:16px;padding-right:16px}
  .nav{padding:.55rem 0;gap:.65rem}
  .brand{gap:.45rem;min-width:0}
  .brand img{height:40px}
  .brand-name{font-size:.94rem}
  .brand-sub{font-size:.54rem;letter-spacing:.08em;white-space:nowrap}
  .nav-toggle{width:44px;height:44px;padding:0;display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto}
  .course-grid,.why-grid{grid-template-columns:1fr}
  .highlights .wrap{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;gap:0;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-links a{padding:.9rem 22px;border-top:1px solid var(--line);display:block}
  .nav-links .nav-cta{padding:1rem 22px}
  .nav-links .btn{border-radius:8px;justify-content:center}
  .hero .wrap{gap:1.45rem;padding-top:1.25rem;padding-bottom:1.75rem}
  .hero-media{display:block;min-height:12.5rem;border-radius:14px;order:-1}
  .hero-media-caption{padding:1.5rem .9rem .7rem;font-size:.75rem}
  .hero-text{min-height:23.5rem}
  .slide{max-width:100%;min-width:0}
  .hero h1{font-size:clamp(1.9rem,9vw,2.45rem);line-height:1.12}
  .hero p.lede{font-size:1rem;margin:.85rem 0 1.15rem}
  .hero-actions{gap:.65rem}
  .btn{min-height:44px;padding:.7rem 1rem;font-size:.94rem}
  .hero-controls{margin-top:1rem;gap:.75rem}
  .hero-dot{width:22px}
  .hero-dot.active{width:28px}
  .highlights .wrap{gap:1rem;padding-top:1.35rem;padding-bottom:1.35rem}
  .hl{gap:.65rem}
  section{padding:3.2rem 0}
  .section-head{margin-bottom:1.8rem}
  .fact-grid{grid-template-columns:1fr;gap:.7rem}
  .map-embed{margin-top:1.25rem}
  .map-embed iframe{height:250px}
  .footer{padding-top:2.2rem}
}
@media (max-width:380px){
  .brand-sub{font-size:.5rem}
  .hero-text{min-height:25.5rem}
  .hero-actions .btn{width:100%;justify-content:center}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}