/* ===== Chuyện Chúng Mình - style chung ===== */
:root{
  --blush:#FFE3EC;
  --petal:#FFC2D4;
  --rose:#F58FB0;
  --deep:#C9476F;
  --ink:#5A3A47;
  --cream:#FFF8FA;
  --paper:#FFFDF7;
  --shadow:0 10px 30px rgba(201,71,111,.12);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Be Vietnam Pro',sans-serif;background:var(--blush);color:var(--ink);overflow-x:hidden}
body:not(.ready) .site{display:none}
::selection{background:var(--rose);color:#fff}

#petals{position:fixed;inset:0;z-index:0;pointer-events:none}
#progress{position:fixed;top:0;left:0;height:4px;width:0;z-index:200;
  background:linear-gradient(90deg,var(--rose),var(--deep));
  box-shadow:0 1px 8px rgba(201,71,111,.5);transition:width .1s linear;border-radius:0 4px 4px 0}

/* ===== Auth ===== */
.auth{position:fixed;inset:0;z-index:90;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(120% 120% at 20% 10%,#FFF0F5 0%,var(--blush) 45%,var(--petal) 100%);
  padding:20px;transition:opacity .6s,visibility .6s}
.auth.hide{opacity:0;visibility:hidden;pointer-events:none}
.auth-card{background:var(--cream);border-radius:28px;box-shadow:0 30px 80px rgba(201,71,111,.25);
  padding:40px 36px;width:100%;max-width:420px;text-align:center;animation:authPop .7s cubic-bezier(.2,1.3,.4,1)}
@keyframes authPop{from{transform:translateY(40px) scale(.92);opacity:0}to{transform:none;opacity:1}}
.auth-heart{font-size:52px;display:inline-block;animation:beat 1.3s ease-in-out infinite;
  filter:drop-shadow(0 8px 18px rgba(201,71,111,.35))}
.auth h1{font-family:'Playfair Display',serif;font-size:30px;margin:14px 0 4px;color:var(--deep)}
.auth .tag{font-family:'Dancing Script',cursive;font-size:21px;color:var(--rose);margin-bottom:24px}
.auth label{display:block;text-align:left;font-size:12px;font-weight:600;letter-spacing:1.5px;
  text-transform:uppercase;color:#a87b8d;margin:14px 0 6px}
.auth input{width:100%;border:2px solid var(--petal);border-radius:14px;padding:12px 14px;
  font-family:inherit;font-size:15px;color:var(--ink);background:#fff;outline:none;transition:.25s}
.auth input:focus{border-color:var(--deep);box-shadow:0 0 0 4px rgba(201,71,111,.12)}
.auth .btn{width:100%;justify-content:center;margin-top:24px}
.auth .err{color:#d23b6b;font-size:13.5px;margin-top:14px;min-height:18px}
.auth .setup-half{border:1.5px dashed var(--petal);border-radius:18px;padding:6px 16px 16px;margin-top:16px;text-align:left}
.auth .setup-half h4{font-family:'Dancing Script',cursive;font-size:21px;color:var(--deep);margin-top:10px}
.auth .note{font-size:12.5px;color:#b58da0;margin-top:14px;line-height:1.6}

/* ===== Chip & nav ===== */
.user-chip{position:fixed;top:14px;right:16px;z-index:60;background:var(--cream);
  border-radius:999px;box-shadow:var(--shadow);padding:8px 8px 8px 16px;display:flex;
  align-items:center;gap:10px;font-size:14px;font-weight:500}
.user-chip button{border:none;background:var(--blush);color:var(--deep);border-radius:999px;
  padding:7px 14px;font-family:inherit;font-size:13px;font-weight:600;cursor:pointer;transition:.25s}
.user-chip button:hover{background:var(--deep);color:#fff}
.back-link{position:fixed;top:14px;left:16px;z-index:60;background:var(--cream);color:var(--deep);
  border-radius:999px;box-shadow:var(--shadow);padding:10px 18px;font-size:14px;font-weight:600;
  text-decoration:none;display:inline-flex;align-items:center;gap:7px;transition:.25s}
.back-link:hover{background:var(--deep);color:#fff;transform:translateX(-3px)}

/* ===== Section & type ===== */
section{position:relative;z-index:1;padding:100px 24px;max-width:1060px;margin:0 auto}
.eyebrow{font-size:13px;letter-spacing:4px;text-transform:uppercase;color:var(--deep);font-weight:600;text-align:center}
h2{font-family:'Playfair Display',serif;font-size:clamp(30px,5vw,46px);text-align:center;margin:10px 0 14px;color:var(--ink)}
.sub{text-align:center;color:#9d7184;max-width:560px;margin:0 auto 50px;font-weight:300;line-height:1.7}
.page-head{padding-top:110px;padding-bottom:30px}

/* ===== Reveal ===== */
.reveal{opacity:0;transform:translateY(64px);filter:blur(8px);
  transition:opacity .9s ease var(--d,0s),transform 1s cubic-bezier(.16,.8,.26,1) var(--d,0s),filter .9s ease var(--d,0s);
  will-change:opacity,transform,filter}
.reveal.r-left{transform:translateX(-90px) rotate(-1.5deg)}
.reveal.r-right{transform:translateX(90px) rotate(1.5deg)}
.reveal.r-zoom{transform:scale(.72) translateY(40px)}
.reveal.in{opacity:1;transform:none;filter:none}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--deep);color:#fff;border:none;border-radius:999px;
  padding:13px 28px;font-family:inherit;font-size:15px;font-weight:500;cursor:pointer;
  box-shadow:0 8px 20px rgba(201,71,111,.3);transition:transform .25s,box-shadow .25s}
.btn:hover{transform:translateY(-3px);box-shadow:0 14px 28px rgba(201,71,111,.4)}
.btn.ghost{background:var(--cream);color:var(--deep)}
.btn.small{padding:9px 18px;font-size:13.5px}
.add-row{display:flex;justify-content:center;gap:14px;margin-top:44px;flex-wrap:wrap}

/* ===== Modal ===== */
.modal-bg{position:fixed;inset:0;background:rgba(90,58,71,.45);backdrop-filter:blur(6px);z-index:100;
  display:none;align-items:center;justify-content:center;padding:20px}
.modal-bg.show{display:flex;animation:fadeIn .3s}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal{background:var(--cream);border-radius:26px;padding:34px 32px;max-width:460px;width:100%;
  box-shadow:0 30px 80px rgba(90,30,55,.3);animation:pop .4s cubic-bezier(.2,1.4,.4,1);max-height:88vh;overflow:auto}
.modal.wide{max-width:680px}
@keyframes pop{from{transform:scale(.8);opacity:0}to{transform:scale(1);opacity:1}}
.modal h3{font-family:'Playfair Display',serif;font-size:24px;margin-bottom:20px;text-align:center;color:var(--deep)}
.modal label{display:block;font-size:13px;font-weight:600;letter-spacing:1px;color:#a87b8d;margin:14px 0 6px;text-transform:uppercase}
.modal input,.modal textarea{width:100%;border:2px solid var(--petal);border-radius:14px;padding:12px 14px;
  font-family:inherit;font-size:15px;color:var(--ink);background:#fff;outline:none;transition:.25s}
.modal input:focus,.modal textarea:focus{border-color:var(--deep);box-shadow:0 0 0 4px rgba(201,71,111,.12)}
.modal textarea{min-height:110px;resize:vertical}
.modal .actions{display:flex;gap:12px;justify-content:flex-end;margin-top:24px}
.modal .hint{font-size:13px;color:#b58da0;line-height:1.6;margin-top:10px}

/* ===== Lightbox ===== */
.lightbox{position:fixed;inset:0;background:rgba(40,15,26,.88);z-index:120;display:none;
  align-items:center;justify-content:center;padding:30px;flex-direction:column;gap:16px}
.lightbox.show{display:flex;animation:fadeIn .3s}
.lightbox img,.lightbox video{max-width:92vw;max-height:78vh;border-radius:18px;box-shadow:0 30px 80px rgba(0,0,0,.5)}
.lightbox .lb-cap{color:#ffd9e6;font-family:'Dancing Script',cursive;font-size:24px;text-align:center}

.empty{text-align:center;color:#b58da0;font-weight:300;padding:34px;border:2px dashed var(--petal);border-radius:22px;line-height:1.7}
.del{position:absolute;top:8px;right:10px;background:none;border:none;color:#c79aab;font-size:17px;cursor:pointer;opacity:0;transition:.25s;line-height:1}
.del:hover{color:var(--deep);transform:scale(1.2)}

footer{position:relative;z-index:1;text-align:center;padding:70px 20px 50px;
  font-family:'Dancing Script',cursive;font-size:clamp(22px,4vw,32px);color:var(--deep)}
footer .tiny{font-family:'Be Vietnam Pro',sans-serif;font-size:12px;color:#b58da0;margin-top:14px;letter-spacing:1px}

@keyframes beat{0%,100%{transform:scale(1)}14%{transform:scale(1.22)}28%{transform:scale(1)}42%{transform:scale(1.16)}}
.click-heart{position:fixed;pointer-events:none;z-index:99;font-size:20px;animation:floatUp 1.1s ease-out forwards}
@keyframes floatUp{from{opacity:1;transform:translateY(0) scale(.6) rotate(0)}to{opacity:0;transform:translateY(-110px) scale(1.4) rotate(20deg)}}
.trail-heart{position:fixed;pointer-events:none;z-index:98;font-size:11px;animation:trailFade .8s ease-out forwards}
@keyframes trailFade{from{opacity:.85;transform:scale(1)}to{opacity:0;transform:scale(.3) translateY(14px)}}

.spinner{display:inline-block;width:18px;height:18px;border:3px solid rgba(255,255,255,.4);
  border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite;vertical-align:middle}
@keyframes spin{to{transform:rotate(360deg)}}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;filter:none}
}