/* ============================================
   OPPORTUNITY TO STUDY (OTS) — SHARED STYLESHEET
   ============================================ */
:root{
  --ink:#10241E;
  --ink-soft:#3E5049;
  --paper:#F1F3EE;
  --paper-raised:#FFFFFF;
  --green:#1F6F54;
  --green-dark:#154E3B;
  --amber:#E8A33D;
  --amber-dark:#C7822A;
  --line:#D8DED4;
  --blue:#2B4570;
  --radius:10px;
  --maxw:1120px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'Inter',sans-serif;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,.display{
  font-family:'Space Grotesk',sans-serif;
  color:var(--ink);
  line-height:1.15;
  margin:0;
}
.mono{font-family:'IBM Plex Mono',monospace;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.wrap-narrow{max-width:760px;margin:0 auto;padding:0 24px;}
.cell-tag{
  font-family:'IBM Plex Mono',monospace;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--green);
  background:rgba(31,111,84,0.08);
  border:1px solid rgba(31,111,84,0.25);
  border-radius:4px;
  padding:2px 8px;
  display:inline-block;
}
button, .btn{
  font-family:'Inter',sans-serif;
  font-weight:600;
  cursor:pointer;
  border:none;
  border-radius:8px;
  padding:13px 22px;
  font-size:15px;
  transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.btn-primary{background:var(--amber);color:#1a1300;}
.btn-primary:hover{background:var(--amber-dark); transform:translateY(-1px);}
.btn-outline{background:transparent;color:var(--paper-raised);border:1.5px solid rgba(255,255,255,0.4);}
.btn-outline:hover{border-color:#fff; transform:translateY(-1px);}
.btn-outline-dark{background:transparent;color:var(--green);border:1.5px solid var(--green);}
.btn-outline-dark:hover{background:rgba(31,111,84,0.08); transform:translateY(-1px);}
.btn-dark{background:var(--green);color:#fff;}
.btn-dark:hover{background:var(--green-dark); transform:translateY(-1px);}
.btn-block{width:100%; justify-content:center;}
.btn[disabled]{opacity:.6; cursor:not-allowed;}

/* ===== NAV ===== */
header{
  position:sticky; top:0; z-index:50;
  background:rgba(241,243,238,0.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
nav.wrap{
  display:flex; align-items:center; justify-content:space-between;
  height:68px;
}
.logo{display:flex; align-items:center; gap:10px; font-family:'Space Grotesk'; font-weight:700; font-size:19px;}
.logo .mark{
  width:34px;height:34px;border-radius:7px;
  background:var(--green);
  color:#fff; display:flex; align-items:center; justify-content:center;
  font-family:'IBM Plex Mono'; font-size:13px; font-weight:600;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.15);
  flex-shrink:0;
}
.navlinks{display:flex; gap:28px; align-items:center;}
.navlinks a{font-size:14.5px; font-weight:500; color:var(--ink-soft);}
.navlinks a:hover, .navlinks a.active{color:var(--green);}
.nav-cta{display:none;}
@media(min-width:860px){.nav-cta{display:inline-flex;}}
.menu-btn{display:flex; background:none; border:none; padding:8px; color:var(--ink);}
@media(min-width:860px){.menu-btn{display:none;} }
@media(max-width:859px){.navlinks{display:none;}}
.mobile-menu{
  display:none; flex-direction:column; gap:2px;
  border-top:1px solid var(--line); background:var(--paper-raised);
  padding:10px 24px 18px;
}
.mobile-menu.open{display:flex;}
.mobile-menu a{padding:12px 4px; font-size:15px; font-weight:500; color:var(--ink-soft); border-bottom:1px solid var(--line);}
.mobile-menu a:last-child{border-bottom:none;}
@media(min-width:860px){.mobile-menu{display:none !important;}}

/* ===== HERO (home) ===== */
.hero{
  background:var(--green-dark);
  background-image:
    linear-gradient(rgba(21,78,59,0.94), rgba(21,78,59,0.97)),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.05) 0, rgba(255,255,255,0.05) 1px, transparent 1px, transparent 42px),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.05) 0, rgba(255,255,255,0.05) 1px, transparent 1px, transparent 96px);
  color:#fff;
  padding:76px 0 84px;
}
.hero-inner{display:grid; gap:40px;}
@media(min-width:920px){.hero-inner{grid-template-columns:1.1fr .9fr; align-items:center;}}
.eyebrow{
  font-family:'IBM Plex Mono'; font-size:13px; letter-spacing:.08em;
  color:#BFE3D3; text-transform:uppercase; margin-bottom:18px; display:block;
}
.hero h1{font-size:clamp(32px,5vw,52px); font-weight:700; letter-spacing:-0.01em;}
.hero h1 em{font-style:normal; color:var(--amber);}
.hero p.lead{font-size:17px; color:#DCE9E3; margin-top:20px; max-width:520px;}
.hero-actions{display:flex; gap:14px; margin-top:30px; flex-wrap:wrap;}

/* ===== PAGE HERO (inner pages: about/courses/blog/course-detail) ===== */
.page-hero{
  background:var(--green-dark);
  background-image:
    linear-gradient(rgba(21,78,59,0.94), rgba(21,78,59,0.97)),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.05) 0, rgba(255,255,255,0.05) 1px, transparent 1px, transparent 42px),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.05) 0, rgba(255,255,255,0.05) 1px, transparent 1px, transparent 96px);
  color:#fff;
  padding:44px 0 52px;
}
.breadcrumb{font-family:'IBM Plex Mono'; font-size:12.5px; color:#9FC9B7; margin-bottom:16px;}
.breadcrumb a:hover{color:#fff;}
.page-hero h1{font-size:clamp(28px,4vw,42px); font-weight:700;}
.page-hero p.lead{font-size:16px; color:#DCE9E3; margin-top:14px; max-width:600px;}

/* formula bar mock */
.formula-bar{
  background:#0F3226;
  border:1px solid rgba(255,255,255,0.15);
  border-radius:10px;
  overflow:hidden;
  box-shadow:0 20px 50px -20px rgba(0,0,0,0.6);
}
.fb-row{display:flex; align-items:center; gap:10px; padding:10px 14px; border-bottom:1px solid rgba(255,255,255,0.1); font-family:'IBM Plex Mono'; font-size:12.5px; color:#9FC9B7;}
.fb-row .fx{color:var(--amber); font-weight:600;}
.fb-body{padding:20px;}
.fb-line{display:flex; gap:14px; padding:10px 0; border-bottom:1px dashed rgba(255,255,255,0.12); font-size:14px;}
.fb-line:last-child{border-bottom:none;}
.fb-line .cellref{font-family:'IBM Plex Mono'; color:#7FB9A2; font-size:12px; width:34px; flex-shrink:0; padding-top:2px;}
.fb-line b{color:#fff;}
.fb-line span{color:#C7DCD3;}
.typed-cursor{display:inline-block; width:8px; height:16px; background:var(--amber); margin-left:2px; animation:blink 1s steps(1) infinite; vertical-align:middle;}
@keyframes blink{50%{opacity:0;}}

/* ===== SECTION HEADERS ===== */
section{padding:80px 0;}
.section-tight{padding:56px 0;}
.sec-head{max-width:640px; margin-bottom:48px;}
.sec-head .cell-tag{margin-bottom:14px;}
.sec-head h2{font-size:clamp(26px,3.4vw,36px); margin-top:6px;}
.sec-head p{color:var(--ink-soft); font-size:16px; margin-top:12px;}
.sec-head-center{max-width:640px; margin:0 auto 48px; text-align:center;}

/* ===== ABOUT / STATS ===== */
.about, .band{background:var(--paper-raised); border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
.about-grid{display:grid; gap:34px;}
@media(min-width:860px){.about-grid{grid-template-columns:repeat(3,1fr);}}
.stat{border:1px solid var(--line); border-radius:var(--radius); padding:24px; background:var(--paper);}
.stat .num{font-family:'IBM Plex Mono'; font-size:30px; font-weight:600; color:var(--green);}
.stat .lbl{font-size:14px; color:var(--ink-soft); margin-top:6px;}

/* ===== VALUES / TWO-COL CONTENT (about page) ===== */
.value-grid{display:grid; gap:24px;}
@media(min-width:760px){.value-grid{grid-template-columns:repeat(3,1fr);}}
.value-card{background:var(--paper-raised); border:1px solid var(--line); border-radius:var(--radius); padding:26px;}
.value-card .vnum{font-family:'IBM Plex Mono'; color:var(--green); font-size:13px; margin-bottom:12px; display:block;}
.value-card h3{font-size:17px; margin-bottom:8px;}
.value-card p{font-size:14px; color:var(--ink-soft); margin:0;}

.split{display:grid; gap:44px;}
@media(min-width:900px){.split{grid-template-columns:1fr 1fr; align-items:center;}}
.split h2{font-size:clamp(24px,3vw,32px); margin-bottom:16px;}
.split p{color:var(--ink-soft); font-size:15.5px; margin-bottom:14px;}
.founder-card{
  background:var(--paper-raised); border:1px solid var(--line); border-radius:var(--radius);
  padding:28px;
}
.founder-avatar{width:56px; height:56px; border-radius:50%; background:var(--blue); color:#fff; display:flex; align-items:center; justify-content:center; font-family:'IBM Plex Mono'; font-weight:600; margin-bottom:16px;}
.timeline{border-left:2px solid var(--line); padding-left:22px; display:flex; flex-direction:column; gap:22px;}
.timeline-item{position:relative;}
.timeline-item::before{content:''; position:absolute; left:-28px; top:4px; width:10px; height:10px; border-radius:50%; background:var(--green); border:2px solid var(--paper);}
.timeline-item .t-label{font-family:'IBM Plex Mono'; font-size:12px; color:var(--green); margin-bottom:4px; display:block;}
.timeline-item h4{font-size:15px; margin-bottom:4px;}
.timeline-item p{font-size:13.5px; color:var(--ink-soft); margin:0;}

/* ===== COURSES — spreadsheet rows ===== */
.sheet{
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  background:var(--paper-raised);
}
.sheet-head{
  display:grid;
  grid-template-columns: 56px 2fr 1fr 1fr 120px;
  background:#E7EBE3;
  font-family:'IBM Plex Mono'; font-size:12px; color:var(--ink-soft);
  text-transform:uppercase; letter-spacing:.04em;
}
.sheet-head div, .sheet-row div{padding:14px 16px; border-right:1px solid var(--line);}
.sheet-head div:last-child, .sheet-row div:last-child{border-right:none;}
.sheet-row{
  display:grid;
  grid-template-columns: 56px 2fr 1fr 1fr 120px;
  border-top:1px solid var(--line);
  align-items:center;
  transition:background .15s ease;
}
.sheet-row:hover{background:#F7F9F5;}
.sheet-row .rowid{font-family:'IBM Plex Mono'; color:var(--green); font-size:13px; font-weight:600;}
.sheet-row .course-name{font-weight:600; font-size:15px;}
.sheet-row .course-desc{font-size:13px; color:var(--ink-soft); margin-top:2px; font-weight:400;}
.sheet-row .level{font-size:13px; color:var(--ink-soft);}
.sheet-row .price{font-family:'IBM Plex Mono'; font-weight:600; color:var(--ink);}
.sheet-row .price .old{color:#A3AFA6; text-decoration:line-through; font-weight:400; margin-right:6px; font-size:12px;}
.sheet-row a.course-link{display:contents;}
.row-btn{
  background:var(--green); color:#fff; font-size:13px; padding:8px 14px; border-radius:6px; font-weight:600;
  display:inline-block;
}
.row-btn:hover{background:var(--green-dark);}
@media(max-width:760px){
  .sheet-head{display:none;}
  .sheet-row{grid-template-columns:1fr; padding:16px; gap:6px;}
  .sheet-row div{border-right:none; padding:2px 0;}
  .sheet-row .rowid{font-size:12px;}
}

/* ===== FILTER PILLS (courses page) ===== */
.filter-row{display:flex; gap:10px; flex-wrap:wrap; margin-bottom:28px;}
.filter-pill{
  font-family:'IBM Plex Mono'; font-size:12.5px; padding:7px 14px; border-radius:20px;
  border:1px solid var(--line); background:var(--paper-raised); color:var(--ink-soft); cursor:pointer;
}
.filter-pill.active{background:var(--green); color:#fff; border-color:var(--green);}

/* ===== SAMPLE CONTENT / FAQ ACCORDION ===== */
.accordion{border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; background:var(--paper-raised);}
.acc-item{border-top:1px solid var(--line);}
.acc-item:first-child{border-top:none;}
.acc-btn{
  width:100%; text-align:left; background:none; border:none;
  display:flex; justify-content:space-between; align-items:center;
  padding:18px 20px; font-size:15px; font-weight:600; color:var(--ink);
}
.acc-btn .mono{color:var(--green); margin-right:12px; font-size:13px;}
.acc-btn .chev{transition:transform .2s ease; color:var(--ink-soft); flex-shrink:0;}
.acc-item.open .chev{transform:rotate(180deg);}
.acc-panel{max-height:0; overflow:hidden; transition:max-height .25s ease;}
.acc-panel-inner{padding:0 20px 20px 52px; color:var(--ink-soft); font-size:14.5px;}
.acc-panel-inner ul{margin:0; padding-left:18px;}
.acc-panel-inner li{margin-bottom:6px;}

/* ===== TESTIMONIALS ===== */
.testi-grid{display:grid; gap:22px;}
@media(min-width:760px){.testi-grid{grid-template-columns:repeat(3,1fr);}}
.testi-card{
  background:var(--paper-raised); border:1px solid var(--line); border-radius:var(--radius);
  padding:24px; display:flex; flex-direction:column; gap:16px;
}
.testi-quote{font-size:14.5px; color:var(--ink); flex-grow:1;}
.testi-who{display:flex; align-items:center; gap:10px;}
.avatar{width:38px; height:38px; border-radius:50%; background:var(--blue); color:#fff; display:flex; align-items:center; justify-content:center; font-family:'IBM Plex Mono'; font-size:13px; font-weight:600; flex-shrink:0;}
.testi-name{font-size:14px; font-weight:600;}
.testi-role{font-size:12.5px; color:var(--ink-soft);}
.verified{font-family:'IBM Plex Mono'; font-size:11px; color:var(--green); display:flex; align-items:center; gap:4px;}

/* ===== VIDEO ===== */
.video-grid{display:grid; gap:22px;}
@media(min-width:760px){.video-grid{grid-template-columns:repeat(3,1fr);}}
.video-card{border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; background:var(--paper-raised);}
.video-thumb{
  aspect-ratio:16/9; background:linear-gradient(135deg, var(--green), var(--green-dark));
  display:flex; align-items:center; justify-content:center; position:relative;
}
.play-btn{width:52px; height:52px; border-radius:50%; background:rgba(255,255,255,0.95); display:flex; align-items:center; justify-content:center;}
.play-btn svg{margin-left:3px;}
.video-meta{padding:14px 16px;}
.video-meta h4{font-size:14.5px; margin:0 0 4px; font-weight:600;}
.video-meta p{font-size:12.5px; color:var(--ink-soft); margin:0;}

/* ===== LOGIN ===== */
.login-wrap{
  background:var(--paper-raised); border:1px solid var(--line); border-radius:var(--radius);
  max-width:440px; padding:32px; margin:0 auto;
}
.login-note{
  background:#FBF3E3; border:1px solid #EFD9A8; color:#7A5A16;
  font-size:13px; padding:10px 14px; border-radius:8px; margin-bottom:20px;
}
.field{margin-bottom:16px;}
.field label{display:block; font-size:13px; font-weight:600; margin-bottom:6px; color:var(--ink-soft);}
.field input, .field textarea, .field select{
  width:100%; padding:11px 13px; border:1px solid var(--line); border-radius:7px;
  font-family:'Inter'; font-size:14px; background:var(--paper);
}
.field input:focus, .field textarea:focus{outline:2px solid var(--green); outline-offset:1px;}
.login-submit{width:100%; justify-content:center; margin-top:6px;}

/* ===== COURSE DETAIL PAGE ===== */
.course-detail-grid{display:grid; gap:40px;}
@media(min-width:920px){.course-detail-grid{grid-template-columns:1.6fr 1fr; align-items:start;}}
.pricing-card{
  background:var(--paper-raised); border:1px solid var(--line); border-radius:var(--radius);
  padding:26px; position:sticky; top:88px;
}
.pricing-card .price-row{display:flex; align-items:baseline; gap:10px; margin-bottom:6px;}
.pricing-card .price-now{font-family:'IBM Plex Mono'; font-size:32px; font-weight:600; color:var(--ink);}
.pricing-card .price-old{font-family:'IBM Plex Mono'; font-size:16px; color:#A3AFA6; text-decoration:line-through;}
.pricing-card .price-note{font-size:12.5px; color:var(--ink-soft); margin-bottom:20px;}
.includes-list{list-style:none; margin:20px 0 0; padding:0; display:flex; flex-direction:column; gap:10px;}
.includes-list li{display:flex; align-items:flex-start; gap:10px; font-size:13.5px; color:var(--ink-soft);}
.includes-list li::before{content:'✓'; color:var(--green); font-weight:700; flex-shrink:0;}
.course-meta-row{display:flex; gap:18px; flex-wrap:wrap; margin:18px 0 28px;}
.course-meta-row .meta-item{font-size:13px; color:var(--ink-soft);}
.course-meta-row .meta-item b{color:var(--ink); display:block; font-family:'IBM Plex Mono'; font-size:14px;}
.curriculum-total{font-size:13.5px; color:var(--ink-soft); margin-bottom:16px;}
.outcome-list{list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:12px;}
.outcome-list li{display:flex; gap:12px; align-items:flex-start; font-size:15px;}
.outcome-list li .tick{width:22px; height:22px; border-radius:50%; background:rgba(31,111,84,0.12); color:var(--green); display:flex; align-items:center; justify-content:center; font-size:12px; flex-shrink:0; margin-top:1px;}

/* ===== BLOG ===== */
.blog-grid{display:grid; gap:26px;}
@media(min-width:760px){.blog-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1040px){.blog-grid{grid-template-columns:repeat(3,1fr);}}
.blog-card{background:var(--paper-raised); border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; display:flex; flex-direction:column;}
.blog-card-top{aspect-ratio:16/10; background:linear-gradient(135deg, var(--green), var(--green-dark)); display:flex; align-items:center; justify-content:center; position:relative;}
.blog-card-top .mono{color:rgba(255,255,255,0.8); font-size:12px;}
.blog-card-body{padding:20px; display:flex; flex-direction:column; gap:10px; flex-grow:1;}
.blog-tag{font-family:'IBM Plex Mono'; font-size:11px; color:var(--green); text-transform:uppercase; letter-spacing:.04em;}
.blog-card h3{font-size:16.5px;}
.blog-card p{font-size:13.5px; color:var(--ink-soft); margin:0; flex-grow:1;}
.blog-meta{font-size:12.5px; color:#8A968E; display:flex; gap:8px; align-items:center; margin-top:auto;}
.blog-post-body{font-size:16px; color:var(--ink);}
.blog-post-body h2{font-size:22px; margin:36px 0 14px;}
.blog-post-body p{margin:0 0 18px; color:#233830;}
.blog-post-body ul{margin:0 0 18px; padding-left:20px;}
.blog-post-body li{margin-bottom:8px; color:#233830;}
.author-box{
  display:flex; gap:14px; align-items:center; padding:20px; background:var(--paper-raised);
  border:1px solid var(--line); border-radius:var(--radius); margin-top:40px;
}
.author-box .name{font-weight:600; font-size:14.5px;}
.author-box .role{font-size:13px; color:var(--ink-soft);}

/* ===== CONTACT / WHATSAPP ===== */
.contact{
  background:var(--green-dark); color:#fff; border-radius:16px;
  padding:52px 40px; text-align:center;
}
.contact h2{color:#fff; font-size:clamp(24px,3vw,32px);}
.contact p{color:#DCE9E3; max-width:480px; margin:14px auto 28px; font-size:15.5px;}
.contact-actions{display:flex; gap:14px; justify-content:center; flex-wrap:wrap;}

/* ===== FOOTER ===== */
footer{border-top:1px solid var(--line); padding:40px 0; margin-top:20px;}
.foot-grid{display:flex; flex-wrap:wrap; justify-content:space-between; gap:24px; align-items:center;}
.foot-links{display:flex; gap:22px; flex-wrap:wrap;}
.foot-links a{font-size:13.5px; color:var(--ink-soft);}
.foot-links a:hover{color:var(--green);}
.foot-copy{font-size:12.5px; color:#8A968E; margin-top:24px;}

.reveal{opacity:0; transform:translateY(14px); transition:opacity .5s ease, transform .5s ease;}
.reveal.in{opacity:1; transform:none;}