*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

/* ===== VIEW TRANSITIONS ===== */
@view-transition { navigation: auto; }

::view-transition-old(page-content) {
  animation: fade-out 0.25s ease-out forwards, slide-out-left 0.3s ease-out forwards;
}
::view-transition-new(page-content) {
  animation: fade-in 0.3s ease-in forwards, slide-in-right 0.3s ease-in forwards;
}
::view-transition-old(sidebar) { animation: none; }
::view-transition-new(sidebar) { animation: none; }
::view-transition-old(topbar) { animation: none; }
::view-transition-new(topbar) { animation: none; }

@keyframes fade-out { from{opacity:1} to{opacity:0} }
@keyframes fade-in { from{opacity:0} to{opacity:1} }
@keyframes slide-out-left { from{transform:translateX(0)} to{transform:translateX(-30px)} }
@keyframes slide-in-right { from{transform:translateX(30px)} to{transform:translateX(0)} }

:root{
  --green-bg:#e9f8d2;
  --green-light:#f4fce8;
  --green-grid:#d4e8b8;
  --teal:#0097b2;
  --teal-dark:#007a91;
  --red:#ff3131;
  --orange:#f2a14d;
  --blue:#004aad;
  --blue-light:#3871bf;
  --navy:#1a2744;
  --white:#ffffff;
  --off-white:#fafdf5;
  --text:#2d3b18;
  --text-light:#5a6e3a;
  --sidebar-w:272px;
}
html{scroll-behavior:smooth}
body{
  font-family:'DM Sans',sans-serif;
  color:var(--text);
  background:var(--off-white);
  min-height:100vh;
  display:flex;flex-direction:column;
}

/* ===== GRAPH PAPER ===== */
.graph-paper{
  background-color:var(--green-bg);
  background-image:
    linear-gradient(var(--green-grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--green-grid) 1px,transparent 1px);
  background-size:28px 28px;
}

/* ===== TOPBAR ===== */
.topbar{
  view-transition-name:topbar;
  background:var(--navy);color:var(--white);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 2rem;height:64px;
  position:sticky;top:0;z-index:100;
  box-shadow:0 2px 12px rgba(0,0,0,.18);
}
.topbar .logo{
  font-family:'Fraunces',serif;font-weight:800;font-size:1.4rem;
  letter-spacing:-.02em;display:flex;align-items:center;gap:.6rem;
  text-decoration:none;color:var(--white);
}
.topbar .logo .icon{
  width:36px;height:36px;background:var(--teal);border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  font-family:'Caveat',cursive;font-size:1.1rem;font-weight:700;
}
.topbar .tagline{
  font-family:'Caveat',cursive;font-size:1.05rem;opacity:.7;
}
.topbar .contact{display:flex;align-items:center;gap:1.2rem;font-size:.85rem}
.topbar .contact a{color:var(--green-bg);text-decoration:none}
.topbar .contact a:hover{text-decoration:underline}
.topbar .phone{
  background:var(--teal);padding:.35rem .9rem;border-radius:6px;
  font-weight:600;color:var(--white)!important;text-decoration:none!important;
}

/* ===== LAYOUT ===== */
.layout{display:flex;flex:1;min-height:calc(100vh - 64px)}

/* ===== SIDEBAR ===== */
.sidebar{
  view-transition-name:sidebar;
  width:var(--sidebar-w);min-width:var(--sidebar-w);
  background:var(--white);border-right:2px solid var(--green-grid);
  padding:1.2rem 0;position:sticky;top:64px;
  height:calc(100vh - 64px);overflow-y:auto;z-index:50;
}
.sidebar::-webkit-scrollbar{width:5px}
.sidebar::-webkit-scrollbar-thumb{background:var(--green-grid);border-radius:3px}
.sidebar .nav-section{
  padding:.15rem 1.2rem .35rem;font-size:.62rem;
  text-transform:uppercase;letter-spacing:.12em;
  color:var(--text-light);font-weight:600;margin-top:.9rem;
}
.sidebar .nav-section:first-child{margin-top:0}
.sidebar a{
  display:flex;align-items:center;gap:.55rem;
  padding:.48rem 1.2rem .48rem 1.5rem;
  color:var(--text);text-decoration:none;
  font-size:.85rem;font-weight:500;
  border-left:3px solid transparent;
  transition:all .15s;
}
.sidebar a:hover{
  background:var(--green-light);
  border-left-color:var(--teal);color:var(--teal-dark);
}
.sidebar a.active{
  background:var(--green-bg);
  border-left-color:var(--teal);color:var(--teal-dark);font-weight:700;
}
.sidebar a .dot{width:7px;height:7px;border-radius:50%;flex-shrink:0}
.sidebar .sub-link{font-size:.8rem}
.sidebar .sub-link .dot{width:7px;height:7px}

/* ===== MAIN ===== */
.main{
  view-transition-name:page-content;
  flex:1;overflow-x:hidden;
}

/* ===== HERO ===== */
.hero{
  padding:4rem 3rem 3.5rem;text-align:center;
  position:relative;overflow:hidden;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(0,151,178,.08),rgba(233,248,210,.3));
  pointer-events:none;
}
.hero .math-doodle{
  position:absolute;font-family:'Caveat',cursive;
  font-size:1.6rem;opacity:.18;font-weight:700;pointer-events:none;
}
.hero .d1{top:12%;left:6%;color:var(--teal);transform:rotate(-12deg);font-size:2rem}
.hero .d2{top:8%;right:8%;color:var(--blue);transform:rotate(8deg)}
.hero .d3{bottom:18%;left:10%;color:var(--red);transform:rotate(-5deg)}
.hero .d4{bottom:12%;right:6%;color:var(--orange);transform:rotate(15deg);font-size:1.3rem}
.hero .d5{top:40%;right:14%;color:var(--teal);transform:rotate(-8deg);font-size:1.2rem}
.hero .d6{top:55%;left:5%;color:var(--blue);transform:rotate(10deg);font-size:1.4rem}
.hero h1{
  font-family:'Fraunces',serif;font-size:2.8rem;font-weight:800;
  color:var(--navy);margin-bottom:.5rem;position:relative;
}
.hero h1 span{
  background:linear-gradient(135deg,var(--teal),var(--blue));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.hero .subtitle{
  font-family:'Caveat',cursive;font-size:1.55rem;
  color:var(--teal-dark);margin-bottom:1.5rem;position:relative;font-weight:600; 
}
.hero p{
  max-width:640px;margin:0 auto 2rem;font-size:1.05rem;
  line-height:1.7;color:var(--text-light);position:relative;
}
.hero .cta-row{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;position:relative}
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.75rem 1.8rem;border-radius:8px;font-weight:700;
  font-size:.95rem;text-decoration:none;transition:all .2s;
  border:none;cursor:pointer;font-family:'DM Sans',sans-serif;
}
.btn-primary{
  background:var(--teal);color:var(--white);
  box-shadow:0 4px 14px rgba(0,151,178,.35);
}
.btn-primary:hover{background:var(--teal-dark);transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,151,178,.4)}
.btn-outline{
  background:transparent;color:var(--navy);border:2px solid var(--navy);
}
.btn-outline:hover{background:var(--navy);color:var(--white)}

/* ===== FEATURES ===== */
.features{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(min(220px,100%),1fr));
  gap:1.5rem;padding:2.5rem 3rem;background:var(--white);
  border-top:2px solid var(--green-grid);border-bottom:2px solid var(--green-grid);
}
.feature-card{
  text-align:center;padding:1.5rem 1rem;border-radius:12px;
  background:var(--green-light);border:1px solid var(--green-grid);
  transition:transform .2s;
}
.feature-card:hover{transform:translateY(-4px)}
.feature-card .emoji{font-size:2rem;margin-bottom:.6rem}
.feature-card h3{font-family:'Fraunces',serif;font-size:1.05rem;color:var(--navy);margin-bottom:.4rem}
.feature-card p{font-size:.82rem;color:var(--text-light);line-height:1.5}

/* ===== PAGE CONTENT ===== */
.page-header{padding:2.5rem 3rem 0}
.page-header h1{font-family:'Fraunces',serif;font-size:2rem;color:var(--navy);margin-bottom:.3rem}
.page-header .page-subtitle{font-family:'Caveat',cursive;font-size:1.2rem;color:var(--teal);margin-bottom:.3rem}
.page-header .desc{max-width:700px;font-size:.95rem;line-height:1.65;color:var(--text-light);margin-bottom:0}
.page-body{padding:1.5rem 3rem 4rem}

/* ===== TOPIC GRID ===== */
.topic-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(min(280px,100%),1fr));gap:1rem;
}
.topic-card{
  background:var(--white);border:1px solid var(--green-grid);
  border-radius:10px;padding:1.1rem 1.3rem;transition:all .2s;
  border-left:4px solid var(--teal);
}
.topic-card:hover{box-shadow:0 4px 16px rgba(0,151,178,.12);transform:translateY(-2px);border-left-color:var(--blue)}
.topic-card .topic-letter{font-family:'Caveat',cursive;font-size:1.3rem;font-weight:700;color:var(--teal);margin-right:.4rem}
.topic-card h4{font-size:.92rem;font-weight:600;color:var(--navy);display:inline}
.topic-card .skill-count{display:block;margin-top:.4rem;font-size:.75rem;color:var(--text-light)}
.topic-card.eng{border-left-color:var(--orange)}
.topic-card.eng .topic-letter{color:var(--orange)}

/* ===== DUAL SECTION ===== */
.dual-section{display:grid;grid-template-columns:1fr 1fr;gap:2rem}
.section-block h3{
  font-family:'Fraunces',serif;font-size:1.2rem;color:var(--navy);
  margin-bottom:.8rem;display:flex;align-items:center;gap:.5rem;
}
.badge{
  font-size:.62rem;background:var(--teal);color:var(--white);
  padding:.15rem .55rem;border-radius:4px;font-family:'DM Sans',sans-serif;
  font-weight:700;text-transform:uppercase;letter-spacing:.05em;
}
.badge-eng{background:var(--orange)!important}

/* ===== TEST PREP ===== */
.test-prep-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(300px,100%),1fr));gap:1.5rem}
.test-card{
  background:var(--white);border:2px solid var(--green-grid);
  border-radius:14px;padding:1.8rem;position:relative;overflow:hidden;
}
.test-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--teal),var(--blue))}
.test-card h3{font-family:'Fraunces',serif;font-size:1.15rem;color:var(--navy);margin-bottom:.5rem}
.test-card ul{list-style:none;padding:0}
.test-card li{
  padding:.35rem 0;font-size:.88rem;color:var(--text-light);
  border-bottom:1px dashed var(--green-grid);display:flex;align-items:center;gap:.5rem;
}
.test-card li::before{content:'✓';color:var(--teal);font-weight:700;font-size:.8rem}

/* ===== SCHEDULE BOX ===== */
.info-box{
  margin-top:2.5rem;padding:2rem;background:var(--green-light);
  border-radius:14px;border:1px solid var(--green-grid);max-width:600px;
}
.info-box h3{font-family:'Fraunces',serif;color:var(--navy);margin-bottom:.5rem;font-size:1.1rem}
.info-box p{font-size:.9rem;color:var(--text-light);line-height:1.6}
.info-box a{color:var(--teal);font-weight:600}

/* ===== BOTTOM CTA ===== */
.bottom-cta{text-align:center;padding:3rem 2rem;background:var(--navy);color:var(--white)}
.bottom-cta h2{font-family:'Fraunces',serif;font-size:1.8rem;margin-bottom:.5rem}
.bottom-cta p{font-family:'Caveat',cursive;font-size:1.2rem;opacity:.75;margin-bottom:1.5rem}
.bottom-cta .btn-primary{background:var(--teal)}

/* ===== WHY SECTION ===== */
.why-section{padding:3rem;max-width:800px;margin:0 auto;text-align:center}
.why-section h2{font-family:'Fraunces',serif;color:var(--navy);font-size:1.6rem;margin-bottom:.8rem}
.why-section p{color:var(--text-light);line-height:1.75;font-size:1rem;margin-bottom:1rem}
.why-section .tagline{font-family:'Caveat',cursive;font-size:1.35rem;color:var(--teal)}

/* ===== TABLE WRAP (horizontal scroll for wide tables on mobile) ===== */
.table-wrap{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}
.table-wrap > table{min-width:540px}

/* ===== FOOTER ===== */
footer{
  background:var(--navy);color:rgba(255,255,255,.5);
  text-align:center;padding:1rem;font-size:.78rem;
  border-top:1px solid rgba(255,255,255,.08);
}
footer a{color:rgba(255,255,255,.6);text-decoration:none}
footer a:hover{text-decoration:underline}

/* ===== FLYER CAROUSEL ===== */
.flyer-carousel{
  position:relative;
  background:var(--navy);
  padding:2.5rem 3rem;
  overflow:hidden;
  border-top:2px solid var(--green-grid);
  border-bottom:2px solid var(--green-grid);
  user-select:none;
}
.flyer-track{
  display:flex;
  transition:transform .45s cubic-bezier(.4,0,.2,1);
}
.flyer-slide{
  min-width:100%;
  display:flex;
  justify-content:center;
  align-items:center;
}
.flyer-slide img{
  max-height:520px;
  max-width:100%;
  width:auto;
  border-radius:10px;
  box-shadow:0 8px 40px rgba(0,0,0,.45);
  display:block;
}
.flyer-btn{
  position:absolute;top:50%;transform:translateY(-50%);
  background:rgba(255,255,255,.12);border:none;
  color:var(--white);font-size:2.2rem;line-height:1;
  width:48px;height:48px;border-radius:50%;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:background .2s;z-index:10;
}
.flyer-btn:hover{background:rgba(255,255,255,.28)}
.flyer-prev{left:1.2rem}
.flyer-next{right:1.2rem}
.flyer-dots{
  display:flex;gap:.55rem;justify-content:center;
  margin-top:1.2rem;
}
.flyer-dot{
  width:9px;height:9px;border-radius:50%;
  background:rgba(255,255,255,.3);border:none;cursor:pointer;
  padding:0;transition:background .2s,transform .2s;
}
.flyer-dot.active{background:var(--teal);transform:scale(1.3)}
@media(max-width:860px){
  .flyer-carousel{padding:1.5rem 1rem}
  .flyer-btn{width:38px;height:38px;font-size:1.7rem}
  .flyer-prev{left:.4rem}
  .flyer-next{right:.4rem}
  .flyer-slide img{max-height:340px}
}

/* ===== MOBILE ===== */
.menu-toggle{display:none;background:none;border:none;color:var(--white);font-size:1.5rem;cursor:pointer;padding:.3rem}
@media(max-width:860px){
  .menu-toggle{display:block}
  .sidebar{
    position:fixed;left:-300px;top:64px;
    height:calc(100vh - 64px);transition:left .3s;
    box-shadow:4px 0 20px rgba(0,0,0,.15);z-index:200;
  }
  .sidebar.open{left:0}
  .sidebar-overlay{
    display:none;position:fixed;inset:0;top:64px;
    background:rgba(0,0,0,.3);z-index:199;
  }
  .sidebar.open ~ .sidebar-overlay{display:block}
  .topbar .tagline{display:none}
  .hero h1{font-size:2rem}
  .hero{padding:3rem 1.5rem 2.5rem}
  .dual-section{grid-template-columns:1fr}
  .page-header,.page-body{padding-left:1.5rem;padding-right:1.5rem}
  .features{padding:2rem 1.5rem}
}

/* ===== SMALL PHONE (<=480px) ===== */
@media(max-width:480px){
  .topbar{padding:0 .9rem}
  .topbar .logo{font-size:1.15rem;gap:.45rem}
  .topbar .logo .icon{width:30px;height:30px}
  .topbar .contact{display:none}
  .menu-toggle{font-size:1.35rem;padding:.2rem}
  .hero{padding:2rem 1rem 1.8rem}
  .hero h1{font-size:1.65rem;line-height:1.15}
  .hero .subtitle{font-size:1.25rem;margin-bottom:1rem}
  .hero p{font-size:.95rem;margin-bottom:1.4rem}
  .hero .math-doodle{display:none}
  .cta-row{gap:.6rem}
  .btn{padding:.65rem 1.2rem;font-size:.9rem;width:100%;justify-content:center}
  .features{padding:1.5rem 1rem;gap:1rem}
  .feature-card{padding:1.2rem .8rem}
  .page-header{padding:1.8rem 1rem 0}
  .page-header h1{font-size:1.6rem}
  .page-body{padding:1rem 1rem 3rem}
  .why-section{padding:2rem 1rem}
  .why-section h2{font-size:1.35rem}
  .bottom-cta{padding:2.2rem 1rem}
  .bottom-cta h2{font-size:1.4rem}
  .info-box{padding:1.2rem;margin-top:1.5rem}
  .test-card{padding:1.3rem}
  .flyer-carousel{padding:1.2rem .6rem}
  .flyer-slide img{max-height:280px}
  .flyer-btn{width:32px;height:32px;font-size:1.4rem}
}


/* ===== FLIP CARDS ===== */
.topic-card{
  cursor:pointer;
  perspective:800px;
  background:transparent;
  border:none;
  padding:0;
  border-left:none;
  min-height:72px;
}
.topic-card:hover{
  box-shadow:none;
  transform:none;
}
.topic-card .card-inner{
  position:relative;
  width:100%;
  min-height:72px;
  transition:transform 0.5s cubic-bezier(.4,.2,.2,1);
  transform-style:preserve-3d;
}
.topic-card.flipped .card-inner{
  transform:rotateY(180deg);
}
.topic-card .card-front,
.topic-card .card-back{
  position:absolute;
  inset:0;
  backface-visibility:hidden;
  -webkit-backface-visibility:hidden;
  border-radius:10px;
  padding:.85rem 1.1rem;
  border:1px solid var(--green-grid);
}
.topic-card .card-front{
  background:var(--white);
  border-left:4px solid var(--teal);
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:.1rem;
}
.topic-card.eng .card-front{border-left-color:var(--orange)}
.topic-card .card-front:hover{
  box-shadow:0 3px 12px rgba(0,151,178,.1);
  border-left-color:var(--blue);
}
.topic-card.eng .card-front:hover{border-left-color:var(--orange)}
.topic-card .card-back{
  background:var(--navy);
  color:var(--white);
  transform:rotateY(180deg);
  border-left:4px solid var(--teal);
  overflow-y:auto;
  font-size:.82rem;
  line-height:1.55;
}
.topic-card.eng .card-back{border-left-color:var(--orange)}
.topic-card .card-back .back-title{
  font-family:'Fraunces',serif;
  font-size:.88rem;
  font-weight:700;
  margin-bottom:.4rem;
  color:var(--green-bg);
}
.topic-card .card-back p{
  color:rgba(255,255,255,.8);
  margin-bottom:.3rem;
}
.topic-card .card-back .close-hint{
  position:absolute;
  top:.5rem;right:.7rem;
  font-size:.65rem;
  opacity:.4;
  font-family:'DM Sans',sans-serif;
}
.topic-card .card-front .skill-count{
  width:100%;
  display:block;
  margin-top:.2rem;
  font-size:.72rem;
  color:var(--text-light);
}
/* Make card-inner height dynamic based on content */
.topic-card.flipped .card-inner{
  min-height:140px;
}
.topic-card .card-front .topic-letter{
  font-family:'Caveat',cursive;
  font-size:1.2rem;font-weight:700;
  color:var(--teal);margin-right:.3rem;
}
.topic-card.eng .card-front .topic-letter{color:var(--orange)}
.topic-card .card-front h4{
  font-size:.88rem;font-weight:600;color:var(--navy);
}

/* ===== ABOUT PAGE ===== */
.about-hero{
  padding:3rem 3rem 2rem;
  position:relative;
}
.about-hero h1{
  font-family:'Fraunces',serif;font-size:2.2rem;
  color:var(--navy);margin-bottom:.3rem;
}
.about-hero .page-subtitle{
  font-family:'Caveat',cursive;font-size:1.3rem;
  color:var(--teal);margin-bottom:1rem;
}
.about-content{
  padding:0 3rem 3rem;
  max-width:900px;
}
.about-content h2{
  font-family:'Fraunces',serif;font-size:1.4rem;
  color:var(--navy);margin:2rem 0 .8rem;
  padding-bottom:.4rem;
  border-bottom:2px solid var(--green-grid);
}
.about-content p{
  font-size:.95rem;line-height:1.7;
  color:var(--text-light);margin-bottom:1rem;
}
.about-content .highlight{
  color:var(--teal-dark);font-weight:600;
}
.timeline{
  display:grid;gap:1rem;margin:1.5rem 0;
}
.timeline-item{
  background:var(--white);
  border:1px solid var(--green-grid);
  border-radius:10px;
  padding:1.2rem 1.5rem;
  border-left:4px solid var(--teal);
  display:flex;gap:1.2rem;align-items:flex-start;
}
.timeline-item .year{
  font-family:'Fraunces',serif;
  font-size:1.3rem;font-weight:700;
  color:var(--teal);white-space:nowrap;
  min-width:50px;
}
.timeline-item .details{font-size:.9rem;color:var(--text-light);line-height:1.6}
.timeline-item .details strong{color:var(--navy)}

.schedule-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(200px,1fr));
  gap:1rem;margin:1.5rem 0;
}
.schedule-card{
  background:var(--white);border:1px solid var(--green-grid);
  border-radius:10px;padding:1.2rem;text-align:center;
  border-top:3px solid var(--teal);
}
.schedule-card.hs{border-top-color:var(--blue)}
.schedule-card h4{
  font-family:'Fraunces',serif;font-size:1rem;
  color:var(--navy);margin-bottom:.3rem;
}
.schedule-card .months{
  font-family:'Caveat',cursive;font-size:1.1rem;
  color:var(--teal);margin-bottom:.4rem;
}
.schedule-card p{font-size:.78rem;color:var(--text-light);line-height:1.5}

.philosophy-box{
  background:var(--green-light);
  border:1px solid var(--green-grid);
  border-radius:14px;
  padding:2rem;margin:1.5rem 0;
}
.philosophy-box h3{
  font-family:'Fraunces',serif;font-size:1.15rem;
  color:var(--navy);margin-bottom:.6rem;
}
.philosophy-box p{
  font-size:.9rem;color:var(--text-light);line-height:1.7;
  margin-bottom:.8rem;
}
.philosophy-box p:last-child{margin-bottom:0}

@media(max-width:860px){
  .about-hero,.about-content{padding-left:1.5rem;padding-right:1.5rem}
  .schedule-grid{grid-template-columns:1fr 1fr}
}

/* ===== PORTAL WIDGET (topbar login tile) ===== */
.portal-widget{position:relative;flex-shrink:0}

.pw-trigger{
  display:flex;align-items:center;gap:.4rem;
  background:rgba(255,255,255,.12);
  border:1.5px solid rgba(255,255,255,.28);
  color:var(--white);padding:.38rem .85rem;
  border-radius:8px;cursor:pointer;
  font-family:'DM Sans',sans-serif;font-size:.8rem;font-weight:600;
  transition:all .2s;white-space:nowrap;line-height:1;
}
.pw-trigger:hover{background:rgba(255,255,255,.22)}
.pw-trigger.pw-loggedin{
  background:var(--teal);border-color:var(--teal);
}
.pw-trigger .pw-icon{font-size:.95rem}

/* Dropdown panel */
.pw-panel{
  position:absolute;top:calc(100% + 10px);right:0;
  width:288px;z-index:300;
  display:none;
  filter:drop-shadow(0 8px 32px rgba(0,0,0,.22));
}
.pw-panel.open{display:block}
/* Arrow */
.pw-panel::before{
  content:'';position:absolute;top:-7px;right:18px;
  width:14px;height:14px;background:var(--white);
  transform:rotate(45deg);
  border-top:1px solid var(--green-grid);
  border-left:1px solid var(--green-grid);
  z-index:1;
}

/* Flip card */
.pw-card{height:290px;perspective:900px;position:relative}
.pw-card-inner{
  position:absolute;inset:0;
  transform-style:preserve-3d;
  transition:transform .55s cubic-bezier(.4,.2,.2,1);
}
.pw-card-inner.flipped{transform:rotateY(180deg)}
.pw-front,.pw-back{
  position:absolute;inset:0;
  backface-visibility:hidden;-webkit-backface-visibility:hidden;
  background:var(--white);
  border:1px solid var(--green-grid);
  border-radius:12px;
  padding:1.2rem 1.2rem 1rem;
  /* overflow:hidden omitted — conflicts with backface-visibility in Chrome */
  z-index:2;
}
.pw-back{
  transform:rotateY(180deg);
  display:flex;flex-direction:column;
  align-items:center;justify-content:center;
  gap:.8rem;
}

.pw-panel-title{
  font-family:'Fraunces',serif;font-size:.92rem;font-weight:700;
  color:var(--navy);margin-bottom:.8rem;text-align:center;
}
.pw-alert{
  display:none;font-size:.76rem;line-height:1.4;
  padding:.45rem .65rem;border-radius:6px;margin-bottom:.6rem;
}
.pw-alert.pw-err {background:#fff0f0;border:1px solid #f5bfbf;color:#8b1a1a}
.pw-alert.pw-info{background:var(--green-light);border:1px solid var(--green-grid);color:var(--text)}
.pw-input{
  display:block;width:100%;
  padding:.5rem .72rem;
  border:1.5px solid var(--green-grid);border-radius:7px;
  font-family:'DM Sans',sans-serif;font-size:.84rem;color:var(--text);
  background:var(--white);outline:none;margin-bottom:.55rem;
  transition:border-color .15s;
}
.pw-input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(0,151,178,.1)}
.pw-submit{
  width:100%;padding:.52rem;
  background:var(--teal);color:var(--white);
  border:none;border-radius:7px;cursor:pointer;
  font-family:'DM Sans',sans-serif;font-size:.86rem;font-weight:700;
  transition:background .15s;margin-top:.1rem;
}
.pw-submit:hover:not(:disabled){background:var(--teal-dark)}
.pw-submit:disabled{opacity:.6;cursor:not-allowed}
.pw-hint{
  font-size:.76rem;color:var(--text-light);
  background:var(--green-light);border:1px solid var(--green-grid);
  border-radius:6px;padding:.45rem .65rem;margin-bottom:.6rem;line-height:1.4;
}

/* Welcome (back face) */
.pw-welcome-name{
  font-family:'Fraunces',serif;font-size:1rem;font-weight:700;
  color:var(--navy);text-align:center;
}
.pw-back-actions{display:flex;flex-direction:column;gap:.45rem;width:100%}
.pw-back-btn{
  display:flex;align-items:center;justify-content:center;gap:.45rem;
  padding:.5rem .9rem;border-radius:7px;
  background:var(--green-light);border:1px solid var(--green-grid);
  color:var(--navy);font-family:'DM Sans',sans-serif;
  font-size:.84rem;font-weight:600;cursor:pointer;
  transition:all .15s;width:100%;
}
.pw-back-btn:hover{background:var(--green-bg);border-color:var(--teal);color:var(--teal-dark)}
.pw-back-btn-out:hover{background:#fff0f0;border-color:var(--red);color:var(--red)}

/* ===== PREFERENCES PAGE ===== */
.prefs-wrap{max-width:720px;padding:2rem 3rem 5rem;flex:1}
.prefs-section{
  background:var(--white);border:1px solid var(--green-grid);
  border-radius:14px;padding:1.6rem 1.8rem;margin-bottom:1.5rem;
}
.prefs-section h2{
  font-family:'Fraunces',serif;font-size:1.1rem;color:var(--navy);
  margin-bottom:1.1rem;padding-bottom:.5rem;
  border-bottom:2px solid var(--green-grid);
}
.prefs-row{display:flex;gap:.7rem;align-items:flex-end;margin-bottom:.8rem}
.prefs-field{flex:1}
.prefs-label{display:block;font-size:.78rem;font-weight:600;color:var(--navy);margin-bottom:.3rem}
.prefs-input{
  width:100%;padding:.55rem .8rem;
  border:1.5px solid var(--green-grid);border-radius:7px;
  font-family:'DM Sans',sans-serif;font-size:.88rem;color:var(--text);
  background:var(--white);outline:none;transition:border-color .15s;
}
.prefs-input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(0,151,178,.1)}
.prefs-input:disabled{background:var(--green-light);color:var(--text-light)}
.prefs-save-btn{
  padding:.52rem 1.1rem;border-radius:7px;white-space:nowrap;
  background:var(--teal);color:var(--white);border:none;
  font-family:'DM Sans',sans-serif;font-size:.84rem;font-weight:700;
  cursor:pointer;transition:background .15s;
}
.prefs-save-btn:hover{background:var(--teal-dark)}
.prefs-save-btn:disabled{opacity:.6;cursor:not-allowed}
.prefs-msg{font-size:.78rem;margin-top:.4rem;min-height:1.1rem}
.prefs-msg.ok {color:#1a6b3a}
.prefs-msg.err{color:var(--red)}
.prefs-verify{display:none;margin-top:.7rem}
.prefs-verify-hint{font-size:.8rem;color:var(--text-light);margin-bottom:.5rem}

/* Prefs tile cards */
.prefs-tile{
  display:flex;align-items:center;justify-content:space-between;
  background:linear-gradient(135deg,var(--navy),var(--blue));
  border-radius:14px;padding:1.6rem 2rem;
  color:var(--white);cursor:pointer;
  text-decoration:none;transition:opacity .2s;
  margin-bottom:1.5rem;
}
.prefs-tile:hover{opacity:.9}
.prefs-tile-enroll{background:linear-gradient(135deg,var(--teal),var(--blue))}
.prefs-tile-refer {background:linear-gradient(135deg,var(--orange),#e07b1c)}
.prefs-tile-left h3{font-family:'Fraunces',serif;font-size:1.1rem;margin-bottom:.3rem}
.prefs-tile-left p{font-size:.82rem;opacity:.82;line-height:1.4}
.prefs-tile-arrow{font-size:2rem;opacity:.6}

.refer-form{margin-top:1rem}
.refer-form input,.refer-form textarea{
  width:100%;padding:.55rem .8rem;margin-bottom:.7rem;
  border:1.5px solid rgba(255,255,255,.35);border-radius:7px;
  background:rgba(255,255,255,.12);color:var(--white);
  font-family:'DM Sans',sans-serif;font-size:.85rem;outline:none;
  transition:border-color .15s;
}
.refer-form input::placeholder,.refer-form textarea::placeholder{color:rgba(255,255,255,.5)}
.refer-form input:focus,.refer-form textarea:focus{border-color:rgba(255,255,255,.7)}
.refer-form textarea{resize:vertical;min-height:70px}
.refer-send-btn{
  background:rgba(255,255,255,.2);color:var(--white);
  border:1.5px solid rgba(255,255,255,.4);
  padding:.5rem 1.2rem;border-radius:7px;
  font-family:'DM Sans',sans-serif;font-size:.85rem;font-weight:700;
  cursor:pointer;transition:all .15s;
}
.refer-send-btn:hover{background:rgba(255,255,255,.35)}

.prefs-not-logged{
  text-align:center;padding:3rem 2rem;color:var(--text-light);
  font-size:.95rem;
}

@media(max-width:860px){
  .prefs-wrap{padding:1.5rem 1rem 3rem}
  .prefs-row{flex-direction:column;align-items:stretch}
  .prefs-save-btn{width:100%}
}