/* ============================================================
   THAI AVIATION 101 — COURSE PAGES
   Design system inherited from approved Home page.
   Navy #0A1D3D · Gold #D4AF37 · White · L.Gray #D9D9D9 · D.Gray #1A1A1A
   Raleway (headlines/buttons) · Montserrat (body)
   ============================================================ */
:root{
  --navy:#0A1D3D;--navy-900:#071630;--navy-800:#0d2448;--navy-700:#13315c;
  --gold:#D4AF37;--gold-soft:#e6cf86;--white:#FFFFFF;--lgray:#D9D9D9;--dgray:#1A1A1A;
  --paper:#F7F8FA;--muted:#5a6472;
  --ff-head:'Raleway',sans-serif;--ff-body:'Montserrat',sans-serif;
  --maxw:1300px;--gutter:clamp(1.25rem,5vw,4rem);--sect-y:clamp(4rem,8vw,7rem);
  --ease:cubic-bezier(.22,.61,.36,1);--shadow:0 24px 60px -28px rgba(10,29,61,.3);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--ff-body);color:var(--navy);background:var(--white);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
::selection{background:var(--gold);color:var(--navy)}
h1,h2,h3,h4{font-family:var(--ff-head);font-weight:700;line-height:1.08;letter-spacing:-.01em}
.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--gutter)}
.eyebrow{font-family:var(--ff-head);font-weight:600;font-size:.72rem;letter-spacing:.34em;text-transform:uppercase;color:var(--gold)}
.gold-rule{width:56px;height:3px;background:var(--gold);border:0;margin:1.1rem 0 0}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--gold);outline-offset:3px}

/* ============ NAV (from Home) ============ */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:.7rem var(--gutter);background:rgba(10,29,61,.86);backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);box-shadow:0 1px 0 rgba(255,255,255,.06)}
.nav-logo{height:37px}
.nav-links{display:flex;align-items:center;gap:2rem;list-style:none}
.nav-links a{font-family:var(--ff-head);font-weight:500;font-size:.82rem;letter-spacing:.1em;text-transform:uppercase;color:rgba(255,255,255,.85);position:relative;display:inline-flex;align-items:center;padding:.35rem 0;transition:color .3s}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-3px;height:2px;width:0;background:var(--gold);transition:width .4s var(--ease)}
.nav-links a:hover,.nav-links a.active{color:#fff}
.nav-links a.active::after,.nav-links a:hover::after{width:100%}
.has-dd{position:relative}
.dd-toggle{display:flex;align-items:center;gap:.35rem;cursor:pointer}
.dd-toggle .chev{width:10px;height:10px;transition:transform .3s var(--ease)}
.has-dd:hover .dd-toggle .chev,.has-dd:focus-within .dd-toggle .chev{transform:rotate(180deg)}
.dd-menu{position:absolute;top:calc(100% + 16px);left:50%;transform:translateX(-50%) translateY(6px);min-width:190px;margin:0;padding:.4rem;list-style:none;background:var(--navy-800);border:1px solid rgba(255,255,255,.1);border-radius:10px;box-shadow:0 24px 48px -20px rgba(0,0,0,.55);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s}
.has-dd:hover .dd-menu,.has-dd:focus-within .dd-menu{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0)}
.dd-menu li{list-style:none}
.dd-menu a{display:block;padding:.55rem .85rem;font-family:var(--ff-head);font-weight:500;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:rgba(255,255,255,.75);border-radius:6px;transition:background .25s,color .25s}
.dd-menu a::after{display:none}
.dd-menu a:hover,.dd-menu a.active{background:rgba(212,175,55,.14);color:var(--gold)}
.nav-links{flex-wrap:nowrap}
.nav-links a{white-space:nowrap}
.dd-toggle{white-space:nowrap}

/* ============ THAI LANGUAGE SUPPORT ============ */
html[lang="th"] body{font-family:'Noto Sans Thai','Montserrat',sans-serif}
html[lang="th"] h1,html[lang="th"] h2,html[lang="th"] h3,html[lang="th"] h4,html[lang="th"] .btn,html[lang="th"] .eyebrow,html[lang="th"] .foot-h,html[lang="th"] .nav-links a,html[lang="th"] .mobile-menu a,html[lang="th"] .dd-menu a{font-family:'Noto Sans Thai','Raleway',sans-serif}
html[lang="th"] .eyebrow,html[lang="th"] .foot-h{letter-spacing:.04em}

@media(max-width:1100px) and (min-width:861px){
.nav-links{gap:.6rem}
.nav-links a{font-size:.72rem;letter-spacing:.04em}
}


.lang{display:flex;align-items:center;gap:.45rem;font-family:var(--ff-head);font-weight:600;font-size:.76rem;letter-spacing:.08em;color:rgba(255,255,255,.8);cursor:pointer}
.lang svg{width:16px;height:16px;opacity:.85}
.lang .chev{width:12px;height:12px;opacity:.7}
.burger{display:none;background:none;border:0;cursor:pointer;flex-direction:column;gap:5px;padding:6px}
.burger span{width:24px;height:2px;background:#fff;transition:.3s}
.mobile-menu{position:fixed;inset:0;z-index:99;background:var(--navy-900);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1.5rem;opacity:0;pointer-events:none;transform:translateY(-8px);transition:.45s var(--ease)}
.mobile-menu.open{opacity:1;pointer-events:auto;transform:none}
.mobile-menu a{font-family:var(--ff-head);font-weight:600;font-size:1.25rem;letter-spacing:.1em;text-transform:uppercase;color:#eaf0fb}
.mobile-menu a:hover{color:var(--gold)}

/* ============ BUTTONS (from Home) ============ */
.btn{font-family:var(--ff-head);font-weight:600;font-size:.76rem;letter-spacing:.14em;text-transform:uppercase;display:inline-flex;align-items:center;gap:.6rem;padding:.85rem 1.7rem;border-radius:2px;cursor:pointer;border:1px solid transparent;transition:all .45s var(--ease);white-space:nowrap}
.btn svg{width:15px;height:15px;transition:transform .45s var(--ease)}
.btn:hover svg{transform:translateX(4px)}
.btn-gold{background:var(--gold);color:var(--navy)}
.btn-gold:hover{background:var(--gold-soft);transform:translateY(-2px)}
.btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-outline:hover{background:rgba(255,255,255,.12);border-color:#fff}

/* ============ PROGRAM TABS ============ */
.tabs{background:var(--navy);padding-top:calc(37px + 1.6rem)}   /* clear fixed nav */
.tabs-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:.9rem;padding:1.2rem 0 1.4rem}
.tab{position:relative;display:flex;align-items:center;gap:.9rem;background:linear-gradient(120deg,var(--navy-700),var(--navy-800));border:1px solid rgba(255,255,255,.07);border-radius:6px;padding:.85rem 1rem;overflow:hidden;transition:transform .3s var(--ease),border-color .3s}
.tab:hover{transform:translateY(-2px);border-color:rgba(212,175,55,.45)}
.tab .thumb{width:66px;height:46px;border-radius:4px;flex-shrink:0;background-size:cover;background-position:center;background-color:var(--navy-700)}
.tab .t-text{min-width:0}
.tab .t-title{font-family:var(--ff-head);font-size:1.05rem;font-weight:700;color:#fff;line-height:1;letter-spacing:.01em}
.tab .t-sub{font-size:.6rem;letter-spacing:.1em;text-transform:uppercase;color:#9fb0cf;margin-top:.35rem;line-height:1.3;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.tab.active{background:#fff;border-color:var(--gold)}
.tab.active .t-title{color:var(--navy)}
.tab.active .t-sub{color:var(--muted)}
.tab.active::after{content:"";position:absolute;left:1rem;right:1rem;bottom:.5rem;height:2px;background:var(--gold)}

/* ============ COURSE HERO ============ */
.chero{position:relative;color:#fff;overflow:hidden}
.chero-bg{position:absolute;inset:0;background-size:cover;background-position:center;z-index:0}
.chero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,18,40,.96) 0%,rgba(7,18,40,.82) 42%,rgba(7,18,40,.25) 100%)}
.chero-inner{position:relative;z-index:1;padding:clamp(3rem,6vw,4.5rem) 0 clamp(2rem,4vw,3rem);max-width:640px}
.chero h1{font-size:clamp(2.6rem,6vw,4.6rem);line-height:.95;font-weight:800;text-transform:uppercase;margin:.6rem 0 0}
.chero .lead{font-size:clamp(1rem,1.3vw,1.1rem);font-weight:300;color:#c4cfe4;max-width:34ch;margin:1.6rem 0 2.6rem}
.chero .lead.ph{font-weight:400}

.stats{display:flex;gap:0;flex-wrap:wrap}
.stat{padding-right:2rem;margin-right:2rem;border-right:1px solid rgba(255,255,255,.18)}
.stat:last-child{border-right:0;margin-right:0;padding-right:0}
.stat .icon{color:var(--gold);width:26px;height:26px;margin-bottom:.7rem}
.stat .num{font-family:var(--ff-head);font-size:clamp(2rem,3.4vw,2.6rem);font-weight:800;line-height:1;color:#fff}
.stat .unit{font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;margin-top:.4rem;color:#eaf0fb}
.stat .desc{font-size:.6rem;letter-spacing:.1em;text-transform:uppercase;color:#9fb0cf;margin-top:.15rem}
.chero-note{position:relative;z-index:1;font-size:.7rem;color:#9fb0cf;padding-bottom:1.6rem;max-width:640px}

/* ============ COURSE OVERVIEW BAND ============ */
.overview{background:var(--navy);color:#eaf0fb;padding-block:var(--sect-y)}
.overview-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,5vw,3.5rem);align-items:start}
.section-label{color:var(--gold);font-family:var(--ff-head);font-size:clamp(1.4rem,2.6vw,1.9rem);font-weight:700;text-transform:uppercase;letter-spacing:.02em;margin-bottom:1.3rem}
.overview p{color:#a9b6cf;font-size:.95rem;font-weight:300}
.feat-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.8rem 2rem}
.feat{display:flex;gap:.9rem}
.feat .f-ic{color:var(--gold);width:26px;height:26px;flex-shrink:0}
.feat h4{color:var(--gold);font-size:.86rem;letter-spacing:.06em;text-transform:uppercase;margin-bottom:.4rem;font-weight:700}
.feat p{color:#a9b6cf;font-size:.8rem;line-height:1.5;font-weight:300}

/* ============ STRUCTURE + INFO ============ */
.detail{padding-block:var(--sect-y);background:#fff}
.detail-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(2rem,5vw,3.4rem)}
.structure-list{display:grid;grid-template-columns:1fr 1fr;gap:1.6rem 1.8rem}
.step{display:flex;gap:.9rem}
.step .s-ic{width:44px;height:44px;border-radius:50%;background:var(--navy);color:var(--gold);display:grid;place-items:center;flex-shrink:0}
.step .s-ic svg{width:20px;height:20px}
.step h4{font-size:.86rem;color:var(--navy);letter-spacing:.04em;text-transform:uppercase;margin-bottom:.3rem;font-weight:700}
.step p{font-size:.78rem;color:var(--muted);line-height:1.5}
.info-table{width:100%;border-collapse:collapse}
.info-table td{padding:.85rem .25rem;border-bottom:1px solid var(--lgray);font-size:.86rem;vertical-align:top}
.info-table td:first-child{color:var(--navy);font-weight:700;text-transform:uppercase;letter-spacing:.04em;font-size:.72rem;width:46%}
.info-table td:last-child{color:var(--muted)}

/* ============ THREE CARDS ROW ============ */
.cards-row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:clamp(1rem,2vw,1.6rem);padding-bottom:var(--sect-y)}
.card{background:#fff;border:1px solid var(--lgray);border-radius:6px;box-shadow:var(--shadow);padding:1.8rem 1.6rem}
.card h3{font-size:1.05rem;color:var(--navy);letter-spacing:.04em;text-transform:uppercase;margin-bottom:1.2rem;font-weight:700}
.card.dark{background:var(--navy);border-color:var(--navy);color:#eaf0fb;position:relative;overflow:hidden}
.card.dark h3{color:#fff}
.check-list{list-style:none;display:grid;gap:.7rem}
.check-list li{position:relative;padding-left:1.5rem;font-size:.85rem;color:var(--muted)}
.check-list li::before{content:"✓";position:absolute;left:0;top:0;color:var(--gold);font-weight:800}
.card.dark .check-list li{color:#c6d1e6}
.price{font-family:var(--ff-head);color:var(--gold);font-size:clamp(1.8rem,3vw,2.3rem);font-weight:800;margin-bottom:.2rem;line-height:1}
.price-sub{font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:#93a2c2;margin-bottom:1.2rem}
.terms{font-size:.66rem;color:#7c8bab;margin-top:1.1rem}
.path{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap}
.path .node{text-align:center;flex:1;min-width:60px}
.path .node .p-ic{color:var(--gold);width:26px;height:26px;margin:0 auto .5rem}
.path .node .p-lbl{font-size:.68rem;color:var(--muted);line-height:1.3}
.path .arrow{color:var(--lgray);font-weight:700}

/* ============ FLEET / EXAM CARDS ============ */
.fleet-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:.7rem}
.fleet-item{text-align:center}
.fleet-item .fimg{width:100%;aspect-ratio:16/11;border-radius:4px;background:var(--paper);background-size:cover;background-position:center}
.fleet-item .fname{font-size:.66rem;color:var(--muted);margin-top:.5rem;line-height:1.2}
.fleet-note{text-align:center;font-size:.68rem;color:var(--muted);margin-top:.9rem}
.exam-figures{display:flex;align-items:center;gap:1rem}
.exam-figures .big{font-family:var(--ff-head);font-size:clamp(1.8rem,3vw,2.4rem);font-weight:800;color:var(--navy)}
.exam-figures .plus{font-size:1.6rem;color:var(--gold)}
.exam-figures .lbl{font-size:.66rem;color:var(--muted);text-transform:uppercase;letter-spacing:.1em}
.exam-split{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1.1rem}
.exam-split .e-col{text-align:center}
.exam-split .e-num{font-family:var(--ff-head);font-size:1.7rem;font-weight:800;color:var(--navy)}
.exam-split .e-lbl{font-size:.62rem;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-top:.25rem;line-height:1.3}

/* ============ CTA ============ */
.cta{position:relative;color:#fff;overflow:hidden}
.cta-bg{position:absolute;inset:0;background-size:cover;background-position:center}
.cta-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,18,40,.82),rgba(7,18,40,.3))}
.cta-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;padding-block:clamp(3rem,6vw,4.5rem);gap:2rem}
.cta h2{font-size:clamp(1.9rem,4vw,3rem);line-height:.98;text-transform:uppercase;color:#fff}
.cta-actions{display:grid;gap:.8rem;min-width:280px}
.cta-actions .btn{justify-content:space-between}

/* ============ FOOTER (from Home) ============ */
.footer{background:var(--navy-900);color:#c6d1e6;padding-top:clamp(3.5rem,7vw,5.5rem)}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1.2fr 1.4fr;gap:clamp(1.8rem,4vw,3rem);padding-bottom:3rem;border-bottom:1px solid rgba(255,255,255,.09)}
.foot-logo{height:60px;margin-bottom:1.1rem}
.foot-brand p{font-size:.85rem;color:#93a2c2;max-width:32ch}
.socials{display:flex;gap:.7rem;margin-top:1.3rem}
.socials a{width:36px;height:36px;border:1px solid rgba(255,255,255,.16);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:.35s var(--ease)}
.socials a:hover{border-color:var(--gold);background:var(--gold);color:var(--navy);transform:translateY(-3px)}
.socials svg{width:15px;height:15px}
.foot-h{font-family:var(--ff-head);font-weight:600;font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:#fff;margin-bottom:1.2rem}
.foot-col ul{list-style:none}
.foot-col li{margin-bottom:.7rem}
.foot-col a,.foot-col span{font-size:.85rem;color:#93a2c2;transition:color .3s}
.foot-col a:hover{color:var(--gold)}
.foot-contact li{display:flex;gap:.6rem;align-items:flex-start}
.foot-contact svg{width:15px;height:15px;color:var(--gold);margin-top:.2rem;flex-shrink:0}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.8rem;padding-block:1.6rem;font-size:.76rem;color:#7c8bab}
.foot-bottom a:hover{color:var(--gold)}

/* ============ PLACEHOLDER STATE ============ */
.placeholder-badge{display:inline-block;background:rgba(212,175,55,.15);color:var(--gold);border:1px dashed var(--gold);border-radius:3px;padding:.25rem .8rem;font-family:var(--ff-head);font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;font-weight:700;margin-bottom:1rem}
.ph{color:#8a97b0;font-style:italic}
.overview .ph,.chero .ph{color:#8496b5}
.ph-block{border:1px dashed var(--lgray);border-radius:6px;padding:1.2rem;color:var(--muted);font-size:.82rem;background:repeating-linear-gradient(45deg,transparent,transparent 10px,rgba(0,0,0,.015) 10px,rgba(0,0,0,.015) 20px)}

/* ============ RESPONSIVE ============ */
@media(max-width:1024px){
  .overview-grid,.detail-grid{grid-template-columns:1fr;gap:2.4rem}
  .cards-row{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:860px){
  .nav-links,.nav .lang{display:none}
  .burger{display:flex}
  .tabs-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .structure-list,.feat-grid{grid-template-columns:1fr}
  .fleet-grid{grid-template-columns:1fr 1fr}
  .tabs-grid{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .stats{gap:1.4rem}
  .stat{border-right:0;margin-right:0;padding-right:0}
  .foot-grid{grid-template-columns:1fr}
  .foot-bottom{flex-direction:column;text-align:center}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}