/* ==========================================================================
   AI program pages (AI for Students / AI for Teachers) — pf-* system v2.
   Shared by templates/ai-for-students.php and templates/ai-for-teachers.php.
   Fonts (Plus Jakarta Sans + Roboto) are enqueued from functions.php.
   ========================================================================== */
:root{
  --pf-red:#C41E3A;--pf-red2:#F0393F;--pf-ink:#0A0A0A;--pf-mut:#64748B;
  --pf-line:#EAEEF3;--pf-paper:#F8FAFC;--pf-green:#16A34A;--pf-green-bg:#F0FDF4;
  --pf-amber:#D97706;--pf-violet:#7C3AED;
  --pf-fh:'Plus Jakarta Sans',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --pf-fb:Roboto,system-ui,-apple-system,'Segoe UI','Nirmala UI',sans-serif;
  --pf-sh-sm:0 1px 2px rgba(15,23,42,.05),0 1px 6px rgba(15,23,42,.04);
  --pf-sh-md:0 12px 28px rgba(15,23,42,.09);
}
.pf{font-family:var(--pf-fb);color:#334155;line-height:1.65;font-size:16px}
.pf *{box-sizing:border-box}
.pf-wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.pf-sec{padding:88px 0}
.pf-sec-paper{background:linear-gradient(180deg,#FBF8F8 0%,#F7FAFC 100%)}
.pf h1,.pf h2,.pf h3{font-family:var(--pf-fh);line-height:1.18;margin:0;color:#0F172A;letter-spacing:-.015em}
.pf h2{font-size:clamp(27px,3vw,38px);text-align:center;font-weight:800}
.pf h2::after{content:"";display:block;width:52px;height:4px;border-radius:2px;background:linear-gradient(90deg,var(--pf-red2),var(--pf-violet));margin:16px auto 0}
.pf-sub{max-width:660px;margin:16px auto 0;text-align:center;color:var(--pf-mut);font-size:17px}
.pf-grid{display:grid;gap:20px;margin-top:44px}
.pf-grid-2{grid-template-columns:repeat(2,1fr)}
.pf-grid-3{grid-template-columns:repeat(3,1fr)}
.pf-grid-4{grid-template-columns:repeat(4,1fr)}
.pf-card{background:#fff;border:1px solid var(--pf-line);border-radius:20px;padding:28px;box-shadow:var(--pf-sh-sm);transition:transform .25s,box-shadow .25s,border-color .25s}
.pf-card:hover{transform:translateY(-4px);box-shadow:var(--pf-sh-md);border-color:#E2E8F0}
.pf-card b{display:block;font-family:var(--pf-fh);font-size:17px;font-weight:700;color:#0F172A;margin-bottom:10px;letter-spacing:-.01em}
.pf-card p{margin:0;font-size:14.5px;color:#5B6B7F}
.pf-note{max-width:760px;margin:30px auto 0;text-align:center;font-size:14px;color:var(--pf-mut);background:#fff;border:1px dashed #D7DEE7;border-radius:14px;padding:14px 20px}
/* hero */
.pf-hero{position:relative;overflow:hidden;padding:60px 0 84px;
  background:
    radial-gradient(760px 460px at 90% 0%,rgba(196,30,58,.06),transparent 62%),
    radial-gradient(640px 460px at 2% 96%,rgba(124,58,237,.06),transparent 62%),
    linear-gradient(180deg,#FFFFFF 0%,#FBFAFC 100%)}
.pf-hgrid{display:grid;grid-template-columns:1.08fr .92fr;gap:52px;align-items:start}
.pf-hgrid>*{min-width:0}
.pf-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;background:#fff;border:1px solid rgba(196,30,58,.25);color:var(--pf-red);font-size:12.5px;font-weight:700;font-family:var(--pf-fh);box-shadow:var(--pf-sh-sm)}
.pf-hero h1{font-size:clamp(32px,3.6vw,50px);font-weight:800;margin:18px 0 14px}
.pf-hero h1 .hl{background:linear-gradient(92deg,var(--pf-red2),var(--pf-red) 55%,#8f1129);-webkit-background-clip:text;background-clip:text;color:transparent}
.pf-lead{font-size:17.5px;color:#51617A;max-width:560px;margin:0 0 22px}
.pf-chips{display:flex;flex-wrap:wrap;gap:9px;margin:0 0 24px}
.pf-chips span{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--pf-line);border-radius:999px;padding:8px 15px;font-size:13px;font-weight:500;color:#3A4A5F;box-shadow:var(--pf-sh-sm)}
.pf-points{list-style:none;margin:0 0 10px;padding:0;display:grid;gap:12px}
.pf-points li{position:relative;padding-left:34px;font-size:15.5px;color:#334155}
.pf-points li b{color:#0F172A;font-weight:600}
.pf-points li::before{content:"\2713";position:absolute;left:0;top:1px;width:23px;height:23px;border-radius:50%;background:var(--pf-green-bg);color:var(--pf-green);border:1px solid rgba(22,163,74,.25);display:grid;place-items:center;font-weight:800;font-size:12px}
/* form card */
.pf-form{position:relative;scroll-margin-top:90px}
.pf-fcard{position:relative;overflow:hidden;background:linear-gradient(165deg,#0D1220 0%,#0B0F19 60%,#131024 100%);color:#fff;border-radius:26px;padding:28px 26px 24px;box-shadow:0 30px 70px rgba(10,15,25,.38);color-scheme:dark}
.pf-fcard::before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(360px 250px at 100% 0%,rgba(240,57,63,.22),transparent 65%),radial-gradient(320px 240px at 0% 100%,rgba(124,58,237,.2),transparent 65%)}
.pf-fcard::after{content:"";position:absolute;top:0;left:0;right:0;height:5px;background:linear-gradient(90deg,#F0393F,#F59E0B,#7C3AED)}
.pf-fcard>*{position:relative}
.pf-fribbon{display:table;margin:0 auto 14px;padding:7px 16px;border-radius:999px;font-size:12.5px;font-weight:700;font-family:var(--pf-fh);color:#fff;background:linear-gradient(135deg,#16A34A,#15803D);box-shadow:0 6px 18px rgba(22,163,74,.35)}
.pf-ftitle{font-family:var(--pf-fh);font-size:24px;font-weight:800;text-align:center;margin:0 0 6px;color:#fff;letter-spacing:-.01em}
.pf-fsub{text-align:center;color:rgba(255,255,255,.62);font-size:13.5px;margin:0 0 18px}
.pf-field{display:block;margin:0 0 13px;font-size:13px;font-weight:500;color:rgba(255,255,255,.85);text-align:left}
.pf-field input,.pf-field select{width:100%;margin-top:6px;padding:13px 16px;border-radius:14px;font-size:16px;color:#fff;font-family:var(--pf-fb);background:rgba(255,255,255,.07);border:1.5px solid rgba(255,255,255,.14);outline:none;transition:border-color .2s,box-shadow .2s,background .2s}
.pf-field input::placeholder{color:rgba(255,255,255,.35)}
.pf-field input:focus,.pf-field select:focus{border-color:#F0393F;background:rgba(255,255,255,.1);box-shadow:0 0 0 4px rgba(240,57,63,.18)}
.pf-field select{appearance:none;-webkit-appearance:none;background-image:linear-gradient(45deg,transparent 50%,rgba(255,255,255,.6) 50%),linear-gradient(135deg,rgba(255,255,255,.6) 50%,transparent 50%);background-position:calc(100% - 22px) 55%,calc(100% - 16px) 55%;background-size:6px 6px;background-repeat:no-repeat}
.pf-field select:invalid{color:rgba(255,255,255,.45)}
.pf-field select option{color:#1E293B;background:#fff}
.pf-consent{display:flex;gap:10px;align-items:flex-start;margin:6px 0 16px;font-size:12.5px;color:rgba(255,255,255,.7);text-align:left;cursor:pointer;line-height:1.5}
.pf-consent input{width:18px;height:18px;margin-top:1px;accent-color:#22C55E;flex:none;cursor:pointer}
.pf-submit{display:block;width:100%;border:0;cursor:pointer;border-radius:999px;padding:16px 20px;font-family:var(--pf-fh);font-size:16.5px;font-weight:800;letter-spacing:.01em;color:#fff;background:linear-gradient(135deg,#F0393F,var(--pf-red) 55%,#A01830);box-shadow:0 14px 30px rgba(196,30,58,.42);transition:transform .2s,box-shadow .2s,filter .2s}
.pf-submit:hover{transform:translateY(-2px);filter:brightness(1.07);box-shadow:0 18px 38px rgba(196,30,58,.5)}
.pf-submit:active{transform:none}
.pf-err{margin:12px 0 0;text-align:center;font-size:13.5px;font-weight:500;color:#FCA5A5;background:rgba(248,113,113,.12);border:1.5px solid rgba(248,113,113,.4);border-radius:12px;padding:10px 14px}
.pf-err:empty{display:none}
.pf-ok{margin:0 0 14px;text-align:center;font-size:14px;font-weight:500;color:#BBF7D0;background:rgba(22,163,74,.16);border:1.5px solid rgba(74,222,128,.4);border-radius:14px;padding:12px 14px;display:none}
.pf-fnote{margin:12px 0 0;text-align:center;font-size:12px;color:rgba(255,255,255,.5)}
.pf-hp{position:absolute;left:-9999px;top:-9999px;height:0;overflow:hidden}
/* dark section */
.pf-dark{position:relative;overflow:hidden;color:#fff;padding:92px 0;
  background:radial-gradient(800px 400px at 85% -10%,rgba(240,57,63,.14),transparent 60%),radial-gradient(700px 420px at 8% 110%,rgba(124,58,237,.14),transparent 60%),linear-gradient(180deg,#0C1120 0%,#0A0E18 100%)}
.pf-dark h2,.pf-dark h3{color:#fff}
.pf-dark h2::after{background:linear-gradient(90deg,#F0393F,#FCD34D)}
.pf-dark .pf-sub{color:rgba(255,255,255,.66)}
.pf-eyebrow{display:block;text-align:center;font-family:var(--pf-fh);font-size:12.5px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:#F87171;margin-bottom:14px}
.pf-stat{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:20px;padding:28px 22px;text-align:center;backdrop-filter:blur(4px);transition:transform .25s,border-color .25s}
.pf-stat:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.22)}
.pf-stat b{display:block;font-family:var(--pf-fh);font-size:34px;font-weight:800;letter-spacing:-.02em;background:linear-gradient(92deg,#FCA5A5,#F0393F);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:8px}
.pf-stat p{margin:0;font-size:14px;color:rgba(255,255,255,.82)}
.pf-src{display:inline-flex;align-items:center;gap:6px;margin-top:14px;background:rgba(252,211,77,.13);border:1px solid rgba(252,211,77,.38);color:#FCD34D;border-radius:999px;padding:5px 13px;font-size:11.5px;font-weight:700}
.pf-dark-close{max-width:720px;margin:36px auto 0;text-align:center;font-size:16.5px;color:rgba(255,255,255,.86)}
/* curriculum bands (students) */
.pf-band{background:#fff;border:1px solid var(--pf-line);border-radius:24px;padding:32px;margin-top:24px;border-left:6px solid var(--pf-red);box-shadow:var(--pf-sh-sm);transition:box-shadow .25s}
.pf-band:hover{box-shadow:var(--pf-sh-md)}
.pf-band.b2{border-left-color:var(--pf-amber)}
.pf-band.b3{border-left-color:var(--pf-violet)}
.pf-band-head{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:16px}
.pf-band-head h3{font-size:21px;font-weight:800}
.pf-band-tag{display:inline-block;background:var(--pf-paper);border:1px solid var(--pf-line);color:#5B6B7F;border-radius:999px;padding:5px 14px;font-size:12px;font-weight:700}
.pf-band ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:11px 26px}
.pf-band ul li{position:relative;padding-left:26px;font-size:14.5px;color:#44546A}
.pf-band ul li::before{content:"\2022";position:absolute;left:8px;color:var(--pf-red);font-weight:800}
.pf-band ul li b{color:#0F172A;font-weight:600}
.pf-band-proj{margin-top:18px;background:var(--pf-green-bg);border:1px solid rgba(22,163,74,.22);border-radius:14px;padding:13px 18px;font-size:14px;color:#166534}
.pf-band-foot{margin-top:12px;font-size:12.5px;color:var(--pf-mut)}
/* modules (teachers) */
.pf-mod{background:#fff;border:1px solid var(--pf-line);border-radius:20px;padding:26px;position:relative;box-shadow:var(--pf-sh-sm);transition:transform .25s,box-shadow .25s}
.pf-mod:hover{transform:translateY(-4px);box-shadow:var(--pf-sh-md)}
.pf-mod i{position:absolute;top:20px;right:22px;font-style:normal;font-family:var(--pf-fh);font-weight:800;font-size:14px;color:#D7DEE7}
.pf-mod b{display:block;font-family:var(--pf-fh);font-size:16px;font-weight:700;color:#0F172A;margin-bottom:9px;padding-right:44px;letter-spacing:-.01em}
.pf-mod p{margin:0;font-size:13.8px;color:#5B6B7F}
.pf-cap{margin-top:24px;background:var(--pf-green-bg);border:1px solid rgba(22,163,74,.25);border-radius:18px;padding:22px 26px;font-size:15px;color:#166534;box-shadow:var(--pf-sh-sm)}
/* tools */
.pf-tgroup{margin-top:34px}
.pf-tgroup h3{font-size:16.5px;font-weight:800;color:#0F172A;margin-bottom:16px}
.pf-tools{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.pf-tools-mt{margin-top:40px}
.pf-tool{background:#fff;border:1px solid var(--pf-line);border-radius:18px;padding:18px;box-shadow:var(--pf-sh-sm);transition:transform .25s,box-shadow .25s}
.pf-tool:hover{transform:translateY(-4px);box-shadow:var(--pf-sh-md)}
.pf-tool b{display:block;font-family:var(--pf-fh);font-size:15px;font-weight:700;color:#0F172A}
.pf-tool p{margin:6px 0 12px;font-size:13px;color:#5B6B7F}
.pf-tool span{display:inline-block;background:var(--pf-green-bg);color:#166534;border-radius:999px;padding:4px 11px;font-size:11px;font-weight:700}
.pf-tool.warn span{background:#FEF3C7;color:#92400E}
.pf-tool.adult span{background:#FFE4E6;color:#9F1239}
.pf-tico{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;font-family:var(--pf-fh);font-weight:800;font-size:15px;color:#fff;margin-bottom:12px;box-shadow:0 4px 10px rgba(15,23,42,.15)}
.pf-excl{margin-top:30px;background:linear-gradient(135deg,#FFF1F2,#FFF7F7);border:1px solid #FECDD3;border-radius:20px;padding:28px;box-shadow:var(--pf-sh-sm)}
.pf-excl b{display:block;font-family:var(--pf-fh);font-size:17px;font-weight:800;color:#9F1239;margin-bottom:8px}
.pf-excl p{margin:0;font-size:14.5px;color:#881337}
/* outcomes */
.pf-out{max-width:760px;margin:40px auto 0;display:grid;gap:13px;padding:0}
.pf-out li{list-style:none;position:relative;padding:15px 18px 15px 48px;background:#fff;border:1px solid var(--pf-line);border-radius:14px;font-size:15px;color:#334155;box-shadow:var(--pf-sh-sm);transition:transform .2s,box-shadow .2s}
.pf-out li:hover{transform:translateX(4px);box-shadow:var(--pf-sh-md)}
.pf-out li::before{content:"\2713";position:absolute;left:15px;top:15px;width:23px;height:23px;border-radius:50%;background:var(--pf-green-bg);color:var(--pf-green);border:1px solid rgba(22,163,74,.25);display:grid;place-items:center;font-weight:800;font-size:12px}
/* faq */
.pf-faq{max-width:820px;margin:40px auto 0}
.pf-faq details{background:#fff;border:1px solid var(--pf-line);border-radius:16px;margin-bottom:13px;overflow:hidden;box-shadow:var(--pf-sh-sm);transition:box-shadow .2s}
.pf-faq details[open]{box-shadow:var(--pf-sh-md)}
.pf-faq summary{cursor:pointer;list-style:none;padding:19px 52px 19px 22px;font-family:var(--pf-fh);font-weight:700;font-size:15.5px;color:#0F172A;position:relative}
.pf-faq summary::-webkit-details-marker{display:none}
.pf-faq summary::after{content:"+";position:absolute;right:20px;top:13px;font-size:24px;color:var(--pf-red);font-weight:400;transition:transform .2s}
.pf-faq details[open] summary::after{transform:rotate(45deg)}
.pf-faq .a{padding:0 22px 20px;font-size:14.5px;color:#5B6B7F}
/* final cta */
.pf-final{position:relative;overflow:hidden;color:#fff;padding:96px 0;text-align:center;
  background:radial-gradient(700px 380px at 80% -20%,rgba(255,255,255,.12),transparent 60%),linear-gradient(135deg,#C41E3A 0%,#8f1129 58%,#4d0817 100%)}
.pf-final h2{color:#fff;font-size:clamp(28px,3.2vw,42px)}
.pf-final h2::after{background:rgba(255,255,255,.5)}
.pf-final p{max-width:640px;margin:16px auto 30px;color:rgba(255,255,255,.88);font-size:17px}
.pf-cta-lg{display:inline-block;background:#fff;color:var(--pf-red);font-family:var(--pf-fh);font-size:17px;font-weight:800;padding:17px 40px;border-radius:999px;text-decoration:none;box-shadow:0 16px 38px rgba(0,0,0,.28);transition:transform .2s,box-shadow .2s}
.pf-cta-lg:hover{transform:translateY(-3px);color:var(--pf-red);box-shadow:0 20px 44px rgba(0,0,0,.34)}
.pf-final small{display:block;margin-top:18px;font-size:12.5px;color:rgba(255,255,255,.62)}
.pf-cta-ghost{display:inline-block;margin-top:30px;border:1.5px solid rgba(255,255,255,.35);color:#fff;font-family:var(--pf-fh);font-weight:700;font-size:15px;padding:13px 30px;border-radius:999px;text-decoration:none;transition:border-color .2s,background .2s}
.pf-cta-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08);color:#fff}
/* illustrations */
.pf-illus{margin:24px 0 0;max-width:430px}
.pf-illus svg{width:100%;height:auto;display:block;border-radius:18px;box-shadow:var(--pf-sh-sm)}
/* sticky mobile cta */
.pf-sticky{position:fixed;left:0;right:0;bottom:0;z-index:60;padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-top:1px solid var(--pf-line);box-shadow:0 -8px 24px rgba(10,10,10,.08);transform:translateY(110%);transition:transform .25s;display:none}
.pf-sticky.show{transform:none}
.pf-sticky a{display:block;text-align:center;background:linear-gradient(135deg,#F0393F,var(--pf-red));color:#fff;font-family:var(--pf-fh);font-weight:800;font-size:15.5px;padding:14px;border-radius:999px;text-decoration:none}
/* scroll reveal (JS adds .pf-rev, then .in when visible) */
.pf-rev{opacity:0;transform:translateY(20px);transition:opacity .55s ease,transform .55s ease}
.pf-rev.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.pf-rev{opacity:1;transform:none;transition:none}.pf-card,.pf-mod,.pf-tool,.pf-stat,.pf-out li{transition:none}}
@media(max-width:900px){
  .pf-hgrid{grid-template-columns:1fr;gap:32px}
  .pf-grid-2,.pf-grid-3,.pf-grid-4,.pf-tools{grid-template-columns:1fr 1fr}
  .pf-band ul{grid-template-columns:1fr}
  .pf-sticky{display:block}
}
@media(max-width:640px){
  .pf-sec{padding:60px 0}
  .pf-grid-2,.pf-grid-3,.pf-grid-4,.pf-tools{grid-template-columns:1fr}
  .pf-fcard{padding:22px 18px 20px}
}