/* ============================================================
   Mia Zhou — Portfolio Styles
   ============================================================ */

/* === Global === */
body {
  font-family: 'Times New Roman', serif;
  font-size: 1rem;
  background: #fff;
  color: #333;
  margin: 0; padding: 0;
  overflow-x: hidden;
  cursor: none;
}
h1,h2,h3,h4 { font-family:'Times New Roman',serif; font-weight:600; color:#2c2c2c; }
p,li,a,button { font-family:'Times New Roman',serif; font-size:1rem; line-height:1.7; color:#333; }

/* === Custom Cursor === */
#cur  { position:fixed; width:10px; height:10px; background:#e8a598; border-radius:50%; pointer-events:none; z-index:9999; transform:translate(-50%,-50%); transition:transform .15s; }
#curR { position:fixed; width:28px; height:28px; border:1.5px solid #e8a598; border-radius:50%; pointer-events:none; z-index:9998; transform:translate(-50%,-50%); opacity:.55; transition:border-color .2s; }

/* === Particles ===
   CHANGE 1: 颜色只保留粉+紫，密度靠 JS 控制（每色1个）
   这里只改动画，让粒子更慢更淡，不那么抢眼 */
#ptcls { position:fixed; inset:0; pointer-events:none; z-index:0; overflow:hidden; }
.ptcl  { position:absolute; border-radius:50%; animation:floatUp linear infinite; opacity:0; }
@keyframes floatUp {
  0%   { transform:translateY(110vh) scale(0); opacity:0; }
  10%  { opacity:.18; }   /* 原版 .4，降低到 .18 */
  90%  { opacity:.08; }   /* 原版 .2，降低到 .08 */
  100% { transform:translateY(-10vh) scale(1); opacity:0; }
}

/* === Floaties & Sparkles === */
.fl  { position:fixed; pointer-events:none; font-size:1rem; z-index:9997; animation:flUp 1.1s ease-out forwards; }
@keyframes flUp { 0%{transform:translate(-50%,-50%) scale(.5);opacity:1} 100%{transform:translate(-50%,calc(-50% - 70px)) scale(1.1);opacity:0} }
.sp2 { position:fixed; border-radius:50%; pointer-events:none; z-index:9997; animation:spFade .75s ease-out forwards; }
@keyframes spFade { 0%{transform:scale(1);opacity:.8} 100%{transform:scale(0);opacity:0} }

/* === Easter Egg ===
   CHANGE 2: 彩虹色动画只用粉+紫，去掉绿/蓝/黄 */
#egg { display:none; position:fixed; top:50%; left:50%; transform:translate(-50%,-50%); z-index:9999; font-family:'Georgia',serif; font-size:1.4rem; font-style:italic; background:#fdf8f2; padding:1.6rem 2.5rem; border-radius:18px; box-shadow:0 20px 60px rgba(0,0,0,.15); text-align:center; pointer-events:none; }
@keyframes rb {
  0%   { color:#e8a598; }
  33%  { color:#c8b8d8; }
  66%  { color:#f5d6cb; }
  100% { color:#e8a598; }
}
.rb { animation:rb 1.2s linear infinite; }

/* === Nav === */
nav { position:fixed; top:0; left:0; right:0; z-index:200; display:flex; justify-content:space-between; align-items:center; padding:.9rem 3rem; background:rgba(10,8,6,.35); backdrop-filter:blur(12px); border-bottom:1px solid rgba(255,255,255,.1); }
.nav-logo { font-family:'Georgia',serif; font-size:1.05rem; font-style:italic; color:#fff; letter-spacing:.02em; }
.nav-links { display:flex; gap:1.6rem; list-style:none; margin:0; padding:0; }
.nav-links a { text-decoration:none; font-size:.72rem; font-weight:500; letter-spacing:.09em; text-transform:uppercase; color:rgba(255,255,255,.85); position:relative; transition:color .3s; }
.nav-links a::after { content:''; position:absolute; bottom:-3px; left:0; width:0; height:1.5px; background:#e8a598; transition:width .3s; }
.nav-links a:hover { color:#fff; }
.nav-links a:hover::after { width:100%; }

/* === Hero === */
.custom-header { min-height:100vh; position:relative; overflow:hidden; display:flex; align-items:center; background-image:url('singapore.jpg'); background-size:cover; background-position:center; color:white; }
#sgBg { position:absolute; inset:0; background:inherit; will-change:transform; z-index:0; }
.custom-header::before { content:""; position:absolute; inset:0; background:rgba(20,14,10,.42); z-index:1; }
.custom-header .container { position:relative; z-index:2; width:100%; max-width:1100px; margin:0 auto; padding:6rem 3rem 3rem; }
.split-header .container { display:flex; flex-direction:row; align-items:center; gap:1.5rem; flex-wrap:wrap; }
.split-header .intro-text { flex:1; min-width:220px; }

.split-header h1 { font-family:'Georgia',serif; font-size:clamp(2.4rem,4.5vw,3.6rem); font-weight:700; color:#fff; line-height:1.1; text-shadow:0 2px 20px rgba(0,0,0,.4); animation:slideUp .9s cubic-bezier(.16,1,.3,1) .2s both; margin-bottom:0; }
.subtitle { font-family:'Georgia',serif; font-size:clamp(1.5rem,3.5vw,2.5rem); font-weight:400; color:rgba(255,255,255,.92); line-height:1.25; margin-top:.4rem; text-shadow:0 2px 16px rgba(0,0,0,.35); animation:slideUp .9s cubic-bezier(.16,1,.3,1) .4s both; }
@keyframes slideUp { from{transform:translateY(35px);opacity:0} to{transform:translateY(0);opacity:1} }
@keyframes fadeIn  { from{opacity:0} to{opacity:1} }

.scroll-hint { margin-top:2rem; display:inline-flex; flex-direction:column; align-items:flex-start; gap:.3rem; font-size:.62rem; letter-spacing:.14em; text-transform:uppercase; color:rgba(255,255,255,.5); animation:fadeIn 2s 1.5s both; }
.scroll-dot { width:5px; height:5px; border-radius:50%; background:#e8a598; animation:bounce 1.5s ease-in-out infinite; }
@keyframes bounce { 0%,100%{transform:translateY(0)} 50%{transform:translateY(7px)} }

/* === Social Icons === */
.social-icons { display:flex; gap:1rem; margin-top:1.8rem; animation:slideUp .9s cubic-bezier(.16,1,.3,1) .6s both; }
.social-icon { display:flex; align-items:center; justify-content:center; width:44px; height:44px; border-radius:50%; background:rgba(255,255,255,.15); border:1.5px solid rgba(255,255,255,.4); color:white; text-decoration:none; backdrop-filter:blur(6px); transition:transform .3s cubic-bezier(.34,1.56,.64,1),background .25s,box-shadow .25s; }
.social-icon svg { width:20px; height:20px; fill:white; transition:transform .3s; }
.social-icon:hover { transform:translateY(-5px) scale(1.12); background:rgba(255,255,255,.28); box-shadow:0 8px 20px rgba(0,0,0,.25); }
.social-icon:hover svg { transform:scale(1.15); }
.social-insta:hover { background:linear-gradient(135deg,rgba(253,180,100,.5),rgba(232,90,120,.4),rgba(140,80,200,.4)); }

/* === Scroll Reveal === */
.title-row {
  display: flex;
  align-items: flex-start;
  gap: 1.2rem;
  justify-content: space-between;
}
.title-text { flex: 1; }

/* === Sun / Moon buttons === */
.theme-btns {
  display: flex;
  flex-direction: column;
  gap: .6rem;
  align-items: center;
  padding-top: .5rem;
  flex-shrink: 0;
}
.theme-btn {
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,.22);
  background: rgba(255,255,255,.1);
  backdrop-filter: blur(8px);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  padding: 0;
  transition: transform .3s cubic-bezier(.34,1.56,.64,1), box-shadow .3s, background .3s, border-color .3s;
}
.theme-btn:hover { transform: scale(1.15); }
.sun-btn .sun-svg  { width: 30px; height: 30px; }
.moon-btn .moon-svg { width: 26px; height: 26px; }
.sun-rays { animation: sunSpin 9s linear infinite; transform-origin: 30px 30px; }
@keyframes sunSpin { to { transform: rotate(360deg); } }
.sun-btn.active-btn {
  background: rgba(255,209,102,.25);
  border-color: rgba(255,209,102,.7);
  box-shadow: 0 0 14px rgba(255,209,102,.5), 0 0 28px rgba(255,209,102,.2);
}
.moon-btn.active-btn {
  background: rgba(200,184,216,.25);
  border-color: rgba(200,184,216,.8);
  box-shadow: 0 0 14px rgba(200,184,216,.5), 0 0 28px rgba(200,184,216,.2);
  animation: moonPulse 2.5s ease-in-out infinite;
}
@keyframes moonPulse {
  0%,100% { box-shadow: 0 0 14px rgba(200,184,216,.5), 0 0 28px rgba(200,184,216,.2); }
  50%      { box-shadow: 0 0 24px rgba(200,184,216,.8), 0 0 48px rgba(200,184,216,.4); }
}

/* === About Card ===
   CHANGE 3: 顶部渐变条只用粉+紫，去掉绿/蓝 */
.about-preview { flex-shrink:0; width:min(360px,42vw); background:rgba(255,255,255,.97); border-radius:20px; padding:2.2rem 1.8rem; text-align:center; box-shadow:0 24px 64px rgba(0,0,0,.22); animation:cardIn .95s cubic-bezier(.34,1.56,.64,1) .5s both; position:relative; overflow:hidden; }
.about-preview::before { content:''; position:absolute; top:0; left:0; right:0; height:3px; background:linear-gradient(90deg,#e8a598,#c8b8d8,#f5d6cb); }
@keyframes cardIn { from{transform:translateY(40px) scale(.95);opacity:0} to{transform:translateY(0) scale(1);opacity:1} }
.about-preview .photo-wrap { position:relative; width:110px; height:110px; margin:0 auto 1.1rem; }
.about-preview .photo-wrap::before { content:''; position:absolute; inset:-5px; border-radius:50%; background:conic-gradient(#e8a598,#f5d6cb,#c8b8d8,#f0b8a0,#e8a598); animation:spin 6s linear infinite; z-index:0; }
.about-preview .photo-wrap::after  { content:''; position:absolute; inset:-2px; border-radius:50%; background:#fff; z-index:1; }
@keyframes spin { to{transform:rotate(360deg)} }
.about-preview img { position:relative; z-index:2; width:110px; height:110px; border-radius:50%; object-fit:cover; display:block; transition:transform .3s; }
.about-preview img:hover { transform:scale(1.05); }
.about-preview h2 { font-family:'Georgia',serif; font-size:1.35rem; font-weight:400; color:#2c2c2c; margin-bottom:.8rem; }
.about-text { font-size:.88rem; line-height:1.72; color:#555; text-align:center; }
.btn { display:inline-block; margin-top:1.2rem; padding:.55rem 1.3rem; border-radius:8px; border:1.5px solid #ccc; font-size:.88rem; font-weight:600; color:#2c2c2c; text-decoration:none; background:#f5f5f5; transition:all .3s; cursor:pointer; }
.btn:hover { transform:scale(1.05) translateY(-2px); box-shadow:0 4px 12px rgba(0,0,0,.1); background:#e8a598; color:white; border-color:#e8a598; }

/* === Letter-by-letter name === */
.letter-h1 { display: flex; flex-wrap: wrap; align-items: baseline; }
.name-letter {
  display: inline-block;
  font-family: 'Georgia', serif;
  font-size: clamp(2.4rem, 4.5vw, 3.6rem);
  font-weight: 700; color: #fff; line-height: 1.1;
  text-shadow: 0 2px 20px rgba(0,0,0,.4);
  cursor: default;
  transition: color .2s, transform .25s cubic-bezier(.34,1.56,.64,1);
  animation: letterDrop .6s cubic-bezier(.34,1.56,.64,1) both;
}
@keyframes letterDrop {
  from { opacity:0; transform: translateY(-28px) rotate(-8deg); }
  to   { opacity:1; transform: translateY(0) rotate(0deg); }
}
.tw-cursor { display:inline-block; color:#e8a598; animation:blink .7s step-end infinite; font-weight:300; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

/* === Skill Bubbles === */
.skill-bubbles {
  display: flex; flex-wrap: wrap; gap: .45rem;
  margin-top: 1.4rem;
  animation: slideUp .9s cubic-bezier(.16,1,.3,1) .55s both;
}
.skill-bubble {
  padding: .28rem .82rem; border-radius: 50px;
  font-family: 'Times New Roman', serif; font-size: .72rem;
  font-weight: 600; letter-spacing: .04em;
  border: 1.5px solid rgba(255,255,255,.32);
  background: rgba(255,255,255,.13);
  color: rgba(255,255,255,.92);
  backdrop-filter: blur(6px);
  cursor: default;
  transition: transform .25s cubic-bezier(.34,1.56,.64,1), background .2s, border-color .2s, box-shadow .2s;
  position: relative; overflow: hidden;
}
.skill-bubble::before {
  content: ''; position: absolute; inset: 0; border-radius: 50px;
  background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,.18) 50%, transparent 70%);
  transform: translateX(-100%); transition: transform .45s;
}
.skill-bubble:hover::before { transform: translateX(100%); }
.skill-bubble:hover {
  transform: translateY(-3px) scale(1.07);
  background: rgba(255,255,255,.24);
  border-color: rgba(255,255,255,.6);
  box-shadow: 0 5px 14px rgba(0,0,0,.18);
}

/* === Scroll Reveal === */
.rev { opacity:0; transform:translateY(22px); transition:opacity .72s cubic-bezier(.16,1,.3,1), transform .72s cubic-bezier(.16,1,.3,1); }
.rev.vis { opacity:1; transform:translateY(0); }

/* === Projects Section === */
.proj-bg-section { position:relative; }
.proj-bg-section::before { content:''; position:absolute; inset:0; background:linear-gradient(180deg,rgba(253,248,242,.96) 0%,rgba(253,248,242,.88) 50%,rgba(253,248,242,.97) 100%), url('singapore.jpg') center 60%/cover no-repeat; z-index:0; }
.proj-bg-section > * { position:relative; z-index:1; }

.section-label { font-size:.63rem; letter-spacing:.18em; text-transform:uppercase; color:#e8a598; font-weight:500; margin-bottom:.45rem; }
.section-title  { font-family:'Georgia',serif; font-size:clamp(1.5rem,2.8vw,2.1rem); font-weight:300; color:#3d2c2c; line-height:1.2; }
.section-title em { font-style:italic; color:#8b5e52; }

/* === Category Tabs === */
.cat-tabs { display:flex; gap:.4rem; flex-wrap:wrap; margin-bottom:2rem; }
.cat-tab { padding:.36rem .95rem; border-radius:50px; font-size:.72rem; font-weight:500; letter-spacing:.05em; border:1.5px solid rgba(232,165,152,.3); background:white; color:#6b4c4c; cursor:pointer; position:relative; overflow:hidden; transition:color .25s, transform .2s, box-shadow .2s; }
.cat-tab .tab-fill { position:absolute; inset:0; border-radius:50px; transform:scaleX(0); transform-origin:left; transition:transform .3s; z-index:0; }
.cat-tab span { position:relative; z-index:1; }
.cat-tab.active, .cat-tab:hover { color:white; border-color:transparent; transform:translateY(-2px); box-shadow:0 5px 14px rgba(0,0,0,.1); }
.cat-tab.active .tab-fill, .cat-tab:hover .tab-fill { transform:scaleX(1); }
.tab-all  .tab-fill { background:linear-gradient(90deg,#e8a598,#c8b8d8); }
.tab-bio  .tab-fill { background:linear-gradient(90deg,#e8a598,#f5d6cb); }
.tab-fin  .tab-fill { background:linear-gradient(90deg,#c8b8d8,#e8a598); }
.tab-math .tab-fill { background:linear-gradient(90deg,#e8c87a,#f5d6cb); }
.tab-app  .tab-fill { background:linear-gradient(90deg,#f5d6cb,#c8b8d8); }

/* === Project Grid === */
.project-grid-css { display:grid; grid-template-columns:repeat(auto-fill,minmax(255px,1fr)); gap:1.2rem; }

/* === Project Card === */
.project-card {
  background: #ffffff;
  border-radius: 14px;
  border: 1px solid rgba(200,180,180,.2);
  box-shadow: 0 2px 12px rgba(100,70,70,.06);
  overflow: hidden;
  display: flex; flex-direction: column;
  position: relative;
  transition: transform .3s cubic-bezier(.34,1.56,.64,1), box-shadow .3s;
}
.project-card::before { content:''; position:absolute; top:0; left:0; right:0; height:3px; background:linear-gradient(90deg,var(--ca),var(--cb)); z-index:2; }
.card-bio  { --ca:#e8a598; --cb:#f5d6cb; }
.card-fin  { --ca:#c8b8d8; --cb:#e8a598; }
.card-math { --ca:#e8c87a; --cb:#f5d6cb; }
.card-app  { --ca:#f5d6cb; --cb:#c8b8d8; }
.project-card:not(.hidden):hover { box-shadow: 0 8px 28px rgba(100,70,70,.13); }
.project-card.hidden { display:none; }

/* card image */
.card-img-wrap.no-pdf { overflow:hidden; height:148px; flex-shrink:0; display:flex; align-items:center; justify-content:center; background:linear-gradient(135deg,rgba(240,230,225,.5),rgba(240,230,225,.2)); }
.card-img-wrap.no-pdf .card-img-placeholder { height:auto; font-size:3rem; background:none; }

/* PDF iframe preview */
.card-pdf-wrap {
  position: relative;
  height: 220px;
  flex-shrink: 0;
  overflow: hidden;
  background: #f8f6f4;
  border-bottom: 1px solid rgba(200,180,180,.15);
}
.card-pdf {
  width: 100%;
  height: 100%;
  border: none;
  pointer-events: none;
  transform-origin: top left;
  display: block;
}
.pdf-overlay-btn {
  position: absolute;
  bottom: 10px; left: 50%;
  transform: translateX(-50%) translateY(6px);
  opacity: 0;
  background: rgba(30,20,20,.82);
  color: #fff;
  font-family: 'Times New Roman', serif;
  font-size: .72rem; font-weight: 600;
  letter-spacing: .04em;
  padding: .38rem 1rem;
  border-radius: 50px;
  text-decoration: none;
  white-space: nowrap;
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,.2);
  transition: opacity .22s, transform .22s;
  pointer-events: none;
}
.project-card:hover .pdf-overlay-btn {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: all;
}

/* card image */
.card-img-wrap { overflow:hidden; height:148px; flex-shrink:0; }
.card-photo { width:100%; height:148px; object-fit:cover; display:block; transition:transform .4s; }
.project-card:hover .card-photo { transform:scale(1.05); }
.card-img-placeholder { height:148px; display:flex; align-items:center; justify-content:center; font-size:2.6rem; background:linear-gradient(135deg,rgba(240,230,225,.5),rgba(240,230,225,.2)); }

/* card body */
.card-body-inner { padding:1.1rem 1.2rem 1.2rem; flex:1; display:flex; flex-direction:column; }
.card-category-label { display:none; }

.project-card h3 { font-family:'Georgia',serif; font-size:.93rem; font-weight:600; color:#2a1e1e; text-align:left; margin-bottom:.35rem; line-height:1.35; }
.card-desc { font-size:.83rem; line-height:1.62; text-align:left; color:#6a5050; flex:1; }

.card-tags { display:none; }

.card-link-row { margin-top:auto; padding-top:.75rem; display:flex; gap:.5rem; flex-wrap:wrap; }
.card-link {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  text-decoration: none;
  padding: .32rem .85rem;
  border-radius: 50px;
  border: 1.5px solid currentColor;
  transition: background .2s, color .2s, transform .2s cubic-bezier(.34,1.56,.64,1);
}
.pdf-link    { color:#c8b8d8; }
.code-link   { color:#e8a598; }
.slides-link { color:#f5d6cb; }
.card-link:hover { transform:translateY(-2px); }
.pdf-link:hover    { background:#c8b8d8; color:#fff; }
.code-link:hover   { background:#e8a598; color:#fff; }
.slides-link:hover { background:#e8a598; color:#fff; }

/* coming soon ribbon */
.coming-banner { position:absolute; top:14px; right:-26px; background:linear-gradient(90deg,#e8a598,#c8b8d8); color:white; font-size:.56rem; font-weight:700; letter-spacing:.1em; text-transform:uppercase; padding:.2rem 2.4rem; transform:rotate(45deg); z-index:3; box-shadow:0 2px 6px rgba(0,0,0,.1); }

/* === Footer === */
footer.bg-dark { background-color:#674a4a !important; color:white; }
footer p { margin:0; text-align:center; color:#fff; font-size:.8rem; }
footer span.heart { color:#e8a598; }

/* === Responsive === */
@media (max-width:800px) {
  .split-header .container { flex-direction:column; padding:7rem 1.5rem 3rem; gap:2.5rem; }
  .about-preview { width:100%; }
  nav { padding:1rem 1.2rem; }
  .project-grid-css { grid-template-columns:1fr; }
  .cartoon-svg { width:160px; height:200px; }
}