/* ============================================================
   THEMES - controlled via [data-theme] on <html>
   ============================================================ */
:root, [data-theme="classic"]{
  --wine:#6d1f3c;
  --wine-deep:#4a1329;
  --blush:#f0c9d3;
  --cream:#fbf3e7;
  --gold:#c39a4b;
  --ink:#3a2530;
  --paper-line:#e3d3c9;
}
[data-theme="dark"]{
  --wine:#e2264d;
  --wine-deep:#ff3b57;
  --blush:#3a2a30;
  --cream:#141416;
  --gold:#ff8fa3;
  --ink:#efe9e2;
  --paper-line:#2a2a30;
}
[data-theme="gold"]{
  --wine:#8a6d1f;
  --wine-deep:#5c4712;
  --blush:#f5e9c8;
  --cream:#fffaf0;
  --gold:#c9a227;
  --ink:#3a2f1a;
  --paper-line:#ecd9a0;
}
[data-theme="teal"]{
  --wine:#0f766e;
  --wine-deep:#0b4f49;
  --blush:#cdeee9;
  --cream:#f1fbf9;
  --gold:#2dd4bf;
  --ink:#123b38;
  --paper-line:#d7f1ec;
}

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

html,body{
  height:100%;
  background:
    radial-gradient(circle at 20% 10%, rgba(195,154,75,0.10), transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(109,31,60,0.14), transparent 45%),
    var(--cream);
  font-family:'Heebo', sans-serif;
  color:var(--ink);
  overflow-x:hidden;
}

.screen{
  min-height:100vh;
  width:100%;
  display:none;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  padding:32px 16px;
  text-align:center;
  position:relative;
}
.screen.active{display:flex; animation:fadeIn .6s ease both;}
@keyframes fadeIn{from{opacity:0; transform:translateY(14px);} to{opacity:1; transform:translateY(0);}}

.loading-note{
  font-family:'Frank Ruhl Libre', serif;
  color:var(--wine);
  font-size:18px;
}

.ambient-heart{
  position:fixed; pointer-events:none; z-index:0; opacity:.35;
  animation:floatUp linear infinite;
  color:var(--wine);
}
@keyframes floatUp{
  0%{transform:translateY(0) rotate(0deg); opacity:0;}
  10%{opacity:.35;}
  90%{opacity:.35;}
  100%{transform:translateY(-110vh) rotate(25deg); opacity:0;}
}

/* ---------- ENVELOPE ---------- */
.envelope-wrap{
  cursor:pointer;
  position:relative;
  z-index:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:28px;
}
.eyebrow{
  letter-spacing:.35em;
  font-size:12px;
  color:var(--wine);
  font-weight:700;
  text-transform:uppercase;
}
.envelope{
  width:min(78vw, 320px);
  height:min(52vw, 210px);
  position:relative;
  filter:drop-shadow(0 18px 30px rgba(74,19,41,0.25));
  transition:transform .35s ease;
}
.envelope-wrap:hover .envelope{transform:translateY(-6px) scale(1.02);}
.env-body{
  position:absolute; inset:0;
  background:linear-gradient(160deg, var(--wine) 0%, var(--wine-deep) 100%);
  border-radius:6px;
}
.env-flap{
  position:absolute; top:0; left:0; right:0; height:60%;
  background:linear-gradient(160deg, var(--wine), var(--wine-deep));
  clip-path:polygon(0 0, 100% 0, 50% 62%);
  transform-origin:top;
  transition:transform .7s cubic-bezier(.6,-0.28,.4,1.4);
  border-radius:6px 6px 0 0;
  z-index:3;
}
.env-seal{
  position:absolute; top:38%; left:50%; transform:translate(-50%,-50%);
  width:52px; height:52px; border-radius:50%;
  background:radial-gradient(circle at 35% 30%, var(--gold), #9a7530);
  display:flex; align-items:center; justify-content:center;
  color:var(--wine-deep); font-size:22px; z-index:4;
  box-shadow:0 4px 10px rgba(0,0,0,.35);
}
.env-letter-peek{
  position:absolute; top:6%; left:8%; right:8%; bottom:8%;
  background:var(--cream);
  border-radius:3px;
  z-index:2;
}
.envelope.opened .env-flap{transform:rotateX(180deg); z-index:1;}
.envelope.opened .env-letter-peek{ animation:letterRise .6s ease .25s forwards; }
@keyframes letterRise{ to{ top:-55%; } }
.cta-hint{ font-size:15px; color:var(--ink); opacity:.7; }
.cta-hint b{color:var(--wine);}

/* ---------- NOTEBOOK ---------- */
.notebook{
  width:min(92vw, 560px);
  background:var(--cream);
  border-radius:4px;
  position:relative;
  box-shadow:0 25px 50px rgba(74,19,41,.22), 0 2px 0 rgba(0,0,0,.05);
  padding:44px 34px 38px;
  background-image:repeating-linear-gradient(var(--cream) 0px, var(--cream) 33px, var(--paper-line) 34px);
  background-position:0 60px;
  z-index:1;
}
.notebook::before{
  content:'';
  position:absolute; top:0; bottom:0; right:36px;
  width:2px; background:rgba(109,31,60,.25);
}
.notebook .spiral{ position:absolute; top:-14px; left:24px; right:24px; display:flex; justify-content:space-between; }
.spiral span{ width:16px; height:16px; border-radius:50%; background:var(--cream); border:3px solid var(--wine); display:block; }
.letter-title{
  font-family:'Frank Ruhl Libre', serif;
  font-size:clamp(22px,5vw,30px);
  color:var(--wine);
  font-weight:700;
  margin-bottom:18px;
}
.letter-body{
  font-family:'Frank Ruhl Libre', serif;
  font-size:clamp(16px,4vw,19px);
  line-height:2;
  color:var(--ink);
  text-align:right;
  min-height:170px;
}
.letter-body p{margin-bottom:14px;}
.letter-body .wild{ color:var(--wine); font-weight:700; font-style:italic; }
.signature{
  margin-top:20px;
  font-family:'Frank Ruhl Libre', serif;
  font-style:italic;
  font-size:20px;
  color:var(--wine-deep);
  transition:opacity .6s ease;
}
.type-cursor{ display:inline-block; color:var(--wine); font-weight:700; animation:blink .85s step-end infinite; }
@keyframes blink{ 0%,100%{opacity:1;} 50%{opacity:0;} }

.btn{
  margin-top:30px;
  background:var(--wine);
  color:var(--cream);
  border:none;
  padding:16px 38px;
  border-radius:40px;
  font-family:'Heebo', sans-serif;
  font-weight:700;
  font-size:16px;
  cursor:pointer;
  box-shadow:0 10px 22px rgba(109,31,60,.3);
  transition:transform .2s ease, box-shadow .2s ease, opacity .6s ease;
}
.btn:hover{transform:translateY(-2px); box-shadow:0 14px 26px rgba(109,31,60,.38);}
.btn:active{transform:translateY(0);}
.btn:focus-visible, .choice:focus-visible, .env-body:focus-visible{outline:3px solid var(--gold); outline-offset:3px;}
#letterBtn{transition:opacity .6s ease;}

/* ---------- PHOTO GALLERY ---------- */
.photo-page{ padding-bottom:32px; }
.photo-grid{ display:flex; flex-direction:column; gap:26px; margin-bottom:10px; }
.photo-card{ display:flex; flex-direction:column; align-items:center; }
.photo-card img{
  width:100%; max-width:340px;
  border-radius:10px;
  box-shadow:0 14px 26px rgba(74,19,41,.22);
  display:block;
}
.photo-caption{
  margin-top:10px;
  font-family:'Frank Ruhl Libre', serif;
  font-style:italic;
  color:var(--wine-deep);
  font-size:16px;
  text-align:center;
}

/* ---------- QUIZ ---------- */
.quiz-card{
  width:min(92vw, 520px);
  background:var(--cream);
  border-radius:18px;
  padding:36px 28px;
  box-shadow:0 25px 50px rgba(74,19,41,.18);
  position:relative;
  z-index:1;
}
.progress{ display:flex; gap:8px; justify-content:center; margin-bottom:26px; flex-wrap:wrap; }
.progress .dot{ width:10px; height:10px; border-radius:50%; background:var(--blush); transition:background .3s ease, transform .3s ease; }
.progress .dot.done{background:var(--wine); transform:scale(1.15);}
.q-eyebrow{ font-size:12px; letter-spacing:.25em; color:var(--gold); font-weight:700; text-transform:uppercase; margin-bottom:10px; }
.q-title{ font-family:'Frank Ruhl Libre', serif; font-size:clamp(20px,5vw,26px); color:var(--wine-deep); margin-bottom:24px; font-weight:700; line-height:1.5; }
.choices{display:flex; flex-direction:column; gap:12px;}
.choice{
  background:#fff; border:2px solid var(--blush); border-radius:12px;
  padding:14px 18px; font-size:16px; font-family:'Heebo', sans-serif;
  color:var(--ink); cursor:pointer; transition:all .2s ease; text-align:right;
}
.choice:hover{border-color:var(--wine); background:#fff8fa;}
.choice.correct{background:#e4f4e7; border-color:#4c9a5c; color:#2c5c36; font-weight:700;}
.choice.wrong{background:#fbe6e6; border-color:#c85a5a; color:#8a3a3a; animation:shake .4s ease;}
@keyframes shake{ 0%,100%{transform:translateX(0);} 25%{transform:translateX(-6px);} 75%{transform:translateX(6px);} }
.feedback{ min-height:24px; margin-top:16px; font-size:14px; font-weight:600; }
.feedback.bad{color:#a23c3c;}
.feedback.good{color:#357a45;}

.date-input{
  width:100%; padding:14px 16px; border-radius:12px; border:2px solid var(--blush);
  font-family:'Heebo', sans-serif; font-size:18px; text-align:center; letter-spacing:1px;
  color:var(--ink); background:#fff;
}
.date-input:focus{outline:none; border-color:var(--wine);}
.date-hint{font-size:12px; color:#8a7268; margin-top:8px;}

.text-input{
  width:100%; padding:14px 16px; border-radius:12px; border:2px solid var(--blush);
  font-family:'Heebo', sans-serif; font-size:16px; text-align:center; color:var(--ink); background:#fff;
}
.text-input:focus{outline:none; border-color:var(--wine);}

/* ---------- FINAL - always dark & dramatic, regardless of theme ---------- */
#screen-final{
  background:radial-gradient(circle at 50% 15%, #232228 0%, #0c0c0e 70%);
  position:relative; overflow:hidden; min-height:100vh;
}
.final-rain{ position:fixed; inset:0; pointer-events:none; z-index:1; overflow:hidden; }
.falling-item{ position:absolute; top:-80px; animation:fallDown linear forwards; will-change:transform, opacity; }
@keyframes fallDown{
  0%{ transform:translateY(0) rotate(0deg); opacity:0; }
  8%{ opacity:1; }
  92%{ opacity:.9; }
  100%{ transform:translateY(115vh) rotate(340deg); opacity:0; }
}
.falling-heart{ color:#e2264d; text-shadow:0 0 14px rgba(226,38,77,.65); }
.falling-photo{
  width:56px; height:56px; object-fit:cover; border-radius:8px;
  border:2px solid rgba(255,255,255,.18); box-shadow:0 8px 18px rgba(0,0,0,.55); filter:grayscale(15%);
}
.final-card{
  width:min(92vw, 560px); z-index:2; position:relative;
  background:rgba(18,18,21,.72); border:1px solid rgba(255,255,255,.08);
  border-radius:22px; padding:44px 30px; backdrop-filter:blur(6px);
  box-shadow:0 30px 60px rgba(0,0,0,.55);
}
.final-icon{font-size:52px; margin-bottom:8px; filter:drop-shadow(0 0 12px rgba(226,38,77,.5));}
.final-title{
  font-family:'Frank Ruhl Libre', serif; font-size:clamp(26px,6vw,36px);
  color:#ff3b57; font-weight:700; margin-bottom:18px; text-shadow:0 0 22px rgba(255,59,87,.35);
}
.final-body{ font-family:'Frank Ruhl Libre', serif; font-size:18px; line-height:1.9; color:#efe9e2; margin-bottom:12px; }
.final-note{ background:rgba(255,255,255,.03); border:2px dashed #ff3b57; border-radius:16px; padding:24px 22px; margin-top:22px; }
#screen-final .signature{ color:#ff8fa3; }
#screen-final .btn{ background:#ff3b57; color:#141416; box-shadow:0 10px 26px rgba(255,59,87,.35); }

.footer-credit{
  position:fixed; bottom:10px; left:0; right:0; text-align:center;
  font-size:11px; color:var(--ink); opacity:.45; z-index:1;
}

@media (prefers-reduced-motion: reduce){ *{animation:none !important; transition:none !important;} }

/* ---------- MOBILE ---------- */
@media (max-width: 480px){
  .screen{ padding:22px 12px; }
  .notebook{ padding:36px 20px 30px; }
  .quiz-card{ padding:26px 18px; }
  .final-card{ padding:32px 20px; }
  .letter-title{ font-size:20px; margin-bottom:14px; }
  .letter-body{ font-size:15.5px; line-height:1.85; }
  .q-title{ font-size:19px; margin-bottom:18px; }
  .choice{ padding:15px 14px; font-size:15px; }
  .btn{ width:100%; padding:15px 20px; font-size:15px; }
  .date-input, .text-input{ font-size:16px; padding:13px 14px; }
  .photo-card img{ max-width:100%; }
  .photo-grid{ gap:20px; }
  .envelope{ width:80vw; height:53vw; }
  .final-icon{ font-size:44px; }
  .final-title{ font-size:24px; }
  .final-body{ font-size:16px; }
  .signature{ font-size:18px; }
}
@media (max-width: 360px){
  .q-title{ font-size:17px; }
  .letter-title{ font-size:18px; }
}
