/* ================================================================
   ANATOMIA QUIZ — style.css
   ================================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── THEME VARIABLES ────────────────────────────────────── */
:root {
  --bg:      #07071a;
  --bg2:     #0d0d26;
  --bg3:     #111133;
  --card:    rgba(255,255,255,0.055);
  --card2:   rgba(255,255,255,0.028);
  --border:  rgba(255,255,255,0.08);
  --border2: rgba(255,255,255,0.13);
  --text:    #eeeef6;
  --dim:     rgba(238,238,246,0.50);
  --dim2:    rgba(238,238,246,0.25);
  --shadow:  0 4px 24px rgba(0,0,0,.4);
  --correct: #22c55e;
  --wrong:   #ef4444;
  --radius:  20px;
  --r-md:    14px;
  --r-sm:    10px;
}

[data-theme="light"] {
  --bg:      #f0f2f8;
  --bg2:     #e4e8f4;
  --bg3:     #d8ddf0;
  --card:    rgba(255,255,255,0.80);
  --card2:   rgba(255,255,255,0.50);
  --border:  rgba(0,0,0,0.08);
  --border2: rgba(0,0,0,0.13);
  --text:    #111128;
  --dim:     rgba(17,17,40,0.50);
  --dim2:    rgba(17,17,40,0.28);
  --shadow:  0 4px 24px rgba(0,0,0,.10);
}

html { height: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI',
               Helvetica, Arial, sans-serif;
  min-height: 100vh;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  overscroll-behavior: none;
  user-select: none;
  -webkit-user-select: none;
  transition: background .25s;
}

/* ── SCREENS ─────────────────────────────────────────── */
.screen {
  position: fixed; inset: 0;
  display: flex; flex-direction: column;
  overflow: hidden;
  background: var(--bg);
}
.screen.hidden { display: none; }

/* ── HOME ─────────────────────────────────────────────── */
#screen-home { overflow: hidden; }
.home-scroll {
  overflow-y: auto; -webkit-overflow-scrolling: touch; flex: 1;
  padding-bottom: calc(28px + env(safe-area-inset-bottom, 16px));
}

.home-header {
  padding: calc(env(safe-area-inset-top, 0px) + 48px) 20px 24px;
  background: linear-gradient(180deg, #12124a 0%, var(--bg) 100%);
  text-align: center; position: relative; overflow: hidden; flex-shrink: 0;
}
[data-theme="light"] .home-header {
  background: linear-gradient(180deg, #c7d2fe 0%, var(--bg) 100%);
}
.home-header::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 90% 60% at 50% -5%, rgba(79,156,249,.18), transparent);
  pointer-events: none;
}
.home-icon  { font-size: 50px; display: block; margin-bottom: 10px; position: relative; }
.home-header h1 { font-size: 24px; font-weight: 800; letter-spacing: -.4px; position: relative; }
.home-header p  { font-size: 13px; color: var(--dim); margin-top: 5px; position: relative; }

/* Theme toggle */
.theme-toggle {
  position: absolute; top: calc(env(safe-area-inset-top,0px) + 14px); right: 16px;
  width: 38px; height: 38px; border-radius: 12px;
  background: var(--card); border: 1px solid var(--border2);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; cursor: pointer; z-index: 10;
  box-shadow: var(--shadow); transition: all .2s;
}
.theme-toggle:active { transform: scale(.9); }

.stats-row { display: flex; gap: 8px; padding: 14px 14px 4px; }
.stat-box {
  flex: 1; padding: 13px 8px; border-radius: var(--r-md);
  background: var(--card); border: 1px solid var(--border);
  text-align: center; box-shadow: var(--shadow);
}
.stat-num { font-size: 20px; font-weight: 800; color: #4f9cf9; }
.stat-lbl { font-size: 11px; color: var(--dim); margin-top: 3px; }

.section-title {
  font-size: 11px; font-weight: 800; letter-spacing: 1.2px;
  text-transform: uppercase; color: var(--dim);
  padding: 18px 16px 8px;
}

/* Mode buttons */
.mode-btns { display: flex; flex-direction: column; gap: 9px; padding: 0 14px 4px; }

.shuffle-btn {
  display: flex; align-items: center; gap: 14px;
  padding: 16px 18px; border-radius: var(--radius);
  background: linear-gradient(135deg, #4f9cf9, #7c3aed);
  border: none; cursor: pointer; font-family: inherit;
  box-shadow: 0 8px 28px -6px rgba(79,156,249,.45);
  transition: transform .15s, box-shadow .15s; width: 100%;
}
.shuffle-btn:active { transform: scale(.97); box-shadow: 0 4px 12px -4px rgba(79,156,249,.3); }
.shuffle-btn .ico { font-size: 26px; flex-shrink: 0; }
.shuffle-btn .txt { text-align: left; }
.shuffle-btn .txt strong { display: block; font-size: 16px; color: #fff; font-weight: 800; }
.shuffle-btn .txt span  { font-size: 12px; color: rgba(255,255,255,.7); }

.images-btn {
  display: flex; align-items: center; gap: 14px;
  padding: 16px 18px; border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(168,85,247,.2), rgba(236,72,153,.12));
  border: 1.5px solid rgba(168,85,247,.35);
  cursor: pointer; font-family: inherit; transition: all .15s; width: 100%;
}
.images-btn:active { transform: scale(.97); }
.images-btn .ico { font-size: 26px; flex-shrink: 0; }
.images-btn .txt { text-align: left; }
.images-btn .txt strong { display: block; font-size: 16px; color: var(--text); font-weight: 800; }
.images-btn .txt span  { font-size: 12px; color: var(--dim); }

/* Module list */
.module-list { padding: 0 14px; display: flex; flex-direction: column; gap: 9px; }
.mod-card {
  display: flex; align-items: center; gap: 13px;
  padding: 13px 15px; border-radius: var(--r-md);
  background: var(--card); border: 1.5px solid var(--border);
  cursor: pointer; transition: all .18s; position: relative; overflow: hidden;
  box-shadow: var(--shadow);
}
.mod-card:active { transform: scale(.98); }
.accent-line { position: absolute; left: 0; top: 0; bottom: 0; width: 3px; border-radius: 2px 0 0 2px; }
.mod-num {
  width: 42px; height: 42px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 900; color: #fff; flex-shrink: 0;
}
.mod-info { flex: 1; min-width: 0; }
.mod-info h3 { font-size: 14px; font-weight: 700; line-height: 1.3; }
.mod-info p  { font-size: 11px; color: var(--dim); margin-top: 3px; }
.mod-prog {
  width: 40px; height: 40px; flex-shrink: 0;
  position: relative; display: flex; align-items: center; justify-content: center;
}
.mod-prog svg { position: absolute; inset: 0; transform: rotate(-90deg); }
.mod-prog .pct { font-size: 10px; font-weight: 800; position: relative; }

/* ── MODAL ────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 500;
  background: rgba(7,7,26,.86); backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  display: flex; align-items: flex-end; justify-content: center;
  animation: fadeIn .2s ease;
}
[data-theme="light"] .modal-overlay { background: rgba(200,210,240,.7); }
.modal-sheet {
  width: 100%; max-width: 520px;
  background: var(--bg3); border: 1.5px solid var(--border2);
  border-radius: 26px 26px 0 0;
  padding: 0 18px calc(env(safe-area-inset-bottom,12px) + 14px);
  max-height: 90vh; overflow-y: auto; -webkit-overflow-scrolling: touch;
}
.modal-handle {
  width: 38px; height: 4px; background: var(--border2);
  border-radius: 2px; margin: 14px auto 18px;
}
.modal-head {
  display: flex; align-items: center; gap: 12px; margin-bottom: 18px;
}
.modal-badge {
  width: 48px; height: 48px; border-radius: 13px;
  display: flex; align-items: center; justify-content: center;
  font-size: 17px; font-weight: 900; color: #fff; flex-shrink: 0;
}
.modal-title { font-size: 15px; font-weight: 800; line-height: 1.3; }
.modal-sub   { font-size: 12px; color: var(--dim); margin-top: 3px; }

.modal-section-label {
  font-size: 10px; font-weight: 800; letter-spacing: 1px;
  text-transform: uppercase; color: var(--dim2);
  margin-bottom: 8px; margin-top: 4px;
}
.modal-btns { display: flex; flex-direction: column; gap: 8px; margin-bottom: 14px; }

.mbtn {
  display: flex; align-items: center; width: 100%;
  padding: 14px 16px; border-radius: 14px;
  border: 1.5px solid var(--border);
  background: var(--card);
  color: var(--text); font-size: 14px; font-weight: 700;
  cursor: pointer; font-family: inherit; transition: all .15s; text-align: left;
}
.mbtn:active { transform: scale(.97); }
.mbtn.primary {
  background: linear-gradient(135deg, #4f9cf9, #7c3aed);
  border-color: transparent; color: #fff;
  box-shadow: 0 6px 20px -6px rgba(79,156,249,.5);
}
.mbtn.teal {
  background: rgba(79,156,249,.1); border-color: rgba(79,156,249,.25); color: #7ec8f9;
}
.mbtn.range { font-size: 13px; padding: 11px 14px; }
.mbtn.danger {
  background: rgba(239,68,68,.07); border-color: rgba(239,68,68,.2); color: #fca5a5;
}
.mbtn.cancel {
  background: transparent; border-color: var(--border); color: var(--dim);
}
.range-count { font-size: 11px; color: var(--dim2); margin-left: auto; }

/* ── QUIZ SCREEN ──────────────────────────────────────── */
.quiz-topbar {
  padding: calc(env(safe-area-inset-top,0px) + 13px) 14px 11px;
  display: flex; align-items: center; gap: 10px;
  flex-shrink: 0; background: var(--bg); border-bottom: 1px solid var(--border);
}
.back-btn {
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--card); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; cursor: pointer; flex-shrink: 0; transition: all .15s;
  color: var(--text);
}
.back-btn:active { transform: scale(.88); }
.topbar-info { flex: 1; min-width: 0; }
.topbar-title { font-size: 13px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar-prog  { font-size: 11px; color: var(--dim); margin-top: 1px; }

.progress-track { height: 3px; background: var(--border); flex-shrink: 0; }
.progress-fill  { height: 100%; border-radius: 2px; background: #4f9cf9; transition: width .4s ease; width: 0%; }

.quiz-body {
  flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch;
  padding: 14px 14px calc(16px + env(safe-area-inset-bottom,12px));
  display: flex; flex-direction: column; gap: 12px;
}

/* Question card */
.q-card {
  background: var(--card); border: 1.5px solid var(--border2);
  border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow);
  animation: slideUp .28s ease both;
}
@keyframes slideUp { from { opacity:0; transform:translateY(14px); } to { opacity:1; transform:translateY(0); } }

.q-badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 10px; border-radius: 20px;
  font-size: 10px; font-weight: 800; letter-spacing: .8px; text-transform: uppercase;
  margin-bottom: 10px;
  background: rgba(79,156,249,.12); color: #7ec8f9; border: 1px solid rgba(79,156,249,.2);
}
.q-badge.img { background: rgba(168,85,247,.12); color: #d8b4fe; border-color: rgba(168,85,247,.25); }
.q-num-label { font-size: 11px; color: var(--dim); margin-bottom: 7px; }
.q-text { font-size: 17px; line-height: 1.65; font-weight: 500; color: var(--text); }

/* ── IMAGE DISPLAY ────────────────────────────────────── */
.q-image-wrap {
  margin-top: 12px; border-radius: var(--r-md); overflow: hidden;
  border: 1px solid var(--border); background: #111;
  position: relative;
  /* Constrain height so it fits on any screen */
  max-height: min(42vh, 320px);
  display: flex; align-items: center; justify-content: center;
}
[data-theme="light"] .q-image-wrap { background: #e8eaf6; }

.q-image-wrap img {
  width: 100%; height: 100%;
  object-fit: contain;
  display: block;
  /* Never taller than the wrap */
  max-height: min(42vh, 320px);
}
.img-loading {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg2); font-size: 13px; color: var(--dim);
}

/* ── OPTIONS ──────────────────────────────────────────── */
.options { display: flex; flex-direction: column; gap: 8px; }
.opt {
  display: flex; align-items: flex-start; gap: 11px;
  padding: 13px 14px; border-radius: var(--r-md);
  border: 1.5px solid var(--border); background: var(--card2);
  cursor: pointer; text-align: left; font-family: inherit; width: 100%;
  transition: border-color .15s, background .15s, transform .1s;
  animation: fadeOpt .25s ease both;
}
.opt:nth-child(1){animation-delay:.04s}.opt:nth-child(2){animation-delay:.08s}
.opt:nth-child(3){animation-delay:.12s}.opt:nth-child(4){animation-delay:.16s}
.opt:nth-child(5){animation-delay:.20s}.opt:nth-child(6){animation-delay:.24s}
@keyframes fadeOpt { from{opacity:0;transform:translateX(-8px)}to{opacity:1;transform:translateX(0)} }
.opt:active { transform: scale(.984); }
.opt-key {
  width: 28px; height: 28px; border-radius: 8px; flex-shrink: 0;
  background: var(--card); border: 1.5px solid var(--border2);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 800; color: var(--dim);
  transition: all .18s; margin-top: 1px;
}
.opt-text { font-size: 14.5px; line-height: 1.55; color: var(--text); }

.opt.correct { background: rgba(34,197,94,.1); border-color: rgba(34,197,94,.45); }
.opt.correct .opt-key { background: var(--correct); border-color: var(--correct); color: #fff; }
.opt.wrong   { background: rgba(239,68,68,.08); border-color: rgba(239,68,68,.4); }
.opt.wrong   .opt-key { background: var(--wrong); border-color: var(--wrong); color: #fff; }
.opt.disabled { cursor: default; }
.opt.disabled:active { transform: none; }
.opt.dimmed  { opacity: .4; }

/* ── EXPLANATION CARD ─────────────────────────────────── */
@keyframes popIn { from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)} }

.expl-card {
  border-radius: var(--radius); overflow: hidden;
  border: 1.5px solid var(--border2);
  background: var(--card); box-shadow: var(--shadow);
  animation: popIn .25s ease both;
}
.expl-card.ok  { border-color: rgba(34,197,94,.28); }
.expl-card.bad { border-color: rgba(239,68,68,.28); }

/* Compact header */
.expl-header {
  display: flex; align-items: flex-start; gap: 11px;
  padding: 13px 15px 12px;
}
.expl-card.ok  .expl-header { background: rgba(34,197,94,.07); }
.expl-card.bad .expl-header { background: rgba(239,68,68,.07); }
.expl-status-icon  { font-size: 24px; flex-shrink: 0; margin-top: 1px; }
.expl-status-text  { flex: 1; min-width: 0; }
.expl-status-title { font-size: 16px; font-weight: 800; }
.expl-card.ok  .expl-status-title { color: var(--correct); }
.expl-card.bad .expl-status-title { color: var(--wrong); }
.expl-status-sub   { font-size: 12px; color: var(--dim); margin-top: 2px; }
/* Wrong answer: show correct inline, compact */
.expl-inline-ans {
  font-size: 13px; color: var(--text); margin-top: 4px;
  line-height: 1.5; font-weight: 600;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.expl-score-badge {
  flex-shrink: 0; font-size: 14px; font-weight: 900;
  background: var(--correct); color: #fff;
  padding: 3px 10px; border-radius: 20px; margin-top: 2px;
  box-shadow: 0 3px 10px -3px rgba(34,197,94,.5);
}

/* Toggle button */
.expl-toggle-btn {
  width: 100%; display: flex; align-items: center; gap: 8px;
  padding: 10px 15px; border: none; border-top: 1px solid var(--border);
  background: var(--card2); cursor: pointer; font-family: inherit;
  color: #7ec8f9; font-size: 13px; font-weight: 700;
  transition: background .15s;
}
.expl-toggle-btn:active { background: var(--card); }
.expl-toggle-ico { font-size: 15px; }
.expl-toggle-lbl { flex: 1; text-align: left; }
.expl-chev { font-size: 11px; opacity: .7; transition: transform .25s; }

/* Collapsible detail */
.expl-detail-wrap {
  max-height: 0; overflow: hidden;
  transition: max-height .4s cubic-bezier(.4,0,.2,1);
}
.expl-detail-wrap.open { max-height: 1000px; }
.expl-detail-inner { padding: 14px 15px 16px; border-top: 1px solid var(--border); }

/* Hint shown before user opens */
.expl-hint {
  font-size: 13px; color: var(--dim2); text-align: center;
  padding: 4px 0; font-style: italic;
}

/* Topic tag */
.expl-topic-tag {
  display: inline-block; font-size: 10px; font-weight: 800;
  letter-spacing: .8px; text-transform: uppercase;
  background: rgba(79,156,249,.1); color: #7ec8f9;
  border: 1px solid rgba(79,156,249,.2);
  border-radius: 20px; padding: 3px 10px; margin-bottom: 10px;
}

/* Main Q→A block */
.expl-qa-main {
  border-radius: var(--r-sm); overflow: hidden;
  border: 1px solid var(--border); margin-bottom: 12px;
}
.expl-qa-row {
  display: flex; gap: 10px; padding: 10px 12px;
  background: var(--card2);
}
.expl-qa-row.ok { background: rgba(34,197,94,.06); }
.expl-qa-icon { font-size: 16px; flex-shrink: 0; margin-top: 2px; }
.expl-qa-lbl  { font-size: 10px; font-weight: 800; letter-spacing: .7px; text-transform: uppercase; color: var(--dim); margin-bottom: 3px; }
.expl-qa-txt  { font-size: 13.5px; line-height: 1.55; color: var(--text); }
.expl-qa-txt.bold { font-weight: 700; color: var(--correct); }
.expl-qa-divider {
  text-align: center; padding: 3px; font-size: 14px; color: #4f9cf9;
  background: rgba(79,156,249,.04); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}

/* Related questions */
.expl-rel-label {
  font-size: 11px; font-weight: 800; letter-spacing: .7px; text-transform: uppercase;
  color: var(--dim2); margin-bottom: 7px;
}
.expl-rel-item {
  padding: 8px 11px; border-radius: var(--r-sm);
  background: var(--card2); border: 1px solid var(--border);
  margin-bottom: 6px;
}
.expl-rel-item:last-child { margin-bottom: 0; }
.expl-rel-q { font-size: 12.5px; color: var(--dim); line-height: 1.5; margin-bottom: 3px; }
.expl-rel-a { font-size: 12.5px; color: #7ec8f9; font-weight: 600; }

/* Next / Quit buttons */
.next-btn {
  padding: 15px; border-radius: var(--r-md);
  background: #4f9cf9; border: none; color: #fff;
  font-size: 15px; font-weight: 700; cursor: pointer;
  font-family: inherit; width: 100%; transition: all .15s;
  box-shadow: 0 6px 20px -6px rgba(79,156,249,.5);
  animation: popIn .25s ease .08s both;
}
.next-btn:active { transform: scale(.97); }

.quit-btn {
  padding: 12px; border-radius: var(--r-md); width: 100%;
  border: 1.5px solid rgba(239,68,68,.18);
  background: rgba(239,68,68,.05);
  color: rgba(239,68,68,.65); font-size: 13px; font-weight: 600;
  cursor: pointer; font-family: inherit; transition: all .15s;
}
.quit-btn:active { background: rgba(239,68,68,.12); transform: scale(.97); }

/* ── RESULTS ──────────────────────────────────────────── */
#screen-results { overflow: hidden; }
.results-scroll {
  overflow-y: auto; -webkit-overflow-scrolling: touch; flex: 1;
  padding-bottom: calc(28px + env(safe-area-inset-bottom,16px));
}
.results-header {
  padding: calc(env(safe-area-inset-top,0px) + 46px) 20px 24px;
  text-align: center;
  background: linear-gradient(180deg,#121230 0%,var(--bg) 100%);
}
[data-theme="light"] .results-header { background: linear-gradient(180deg,#d0d8f8 0%,var(--bg) 100%); }
.results-icon  { font-size: 60px; display: block; margin-bottom: 12px; }
.results-title { font-size: 24px; font-weight: 800; letter-spacing: -.4px; }
.results-sub   { font-size: 13px; color: var(--dim); margin-top: 6px; }

.score-ring-wrap { display: flex; justify-content: center; padding: 24px 20px 8px; }
.score-ring {
  width: 140px; height: 140px; position: relative;
  display: flex; align-items: center; justify-content: center;
}
.score-ring svg { position: absolute; inset: 0; transform: rotate(-90deg); }
.score-ring circle { fill: none; stroke-width: 10; }
.ring-track { stroke: var(--border); }
.ring-fill  { stroke-dasharray: 377; stroke-dashoffset: 377; transition: stroke-dashoffset 1.2s cubic-bezier(.25,.46,.45,.94); }
.score-inner { position: relative; text-align: center; }
.score-pct { font-size: 32px; font-weight: 900; }
.score-of  { font-size: 12px; color: var(--dim); margin-top: 2px; }

.stars-row { display: flex; justify-content: center; gap: 8px; padding: 8px 20px 20px; }
.star { font-size: 32px; filter: grayscale(1) opacity(.25); transition: all .4s ease; }
.star.lit { filter: none; transform: scale(1.15); }

.res-stats { display: flex; gap: 8px; padding: 0 14px 14px; }
.res-stat {
  flex: 1; padding: 13px 8px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--r-md); text-align: center; box-shadow: var(--shadow);
}
.res-stat .val { font-size: 22px; font-weight: 800; }
.res-stat .lbl { font-size: 11px; color: var(--dim); margin-top: 3px; }
.res-stat.cs .val { color: var(--correct); }
.res-stat.ws .val { color: var(--wrong); }
.res-stat.ts .val { color: #4f9cf9; }

.res-actions { display: flex; flex-direction: column; gap: 8px; padding: 0 14px 20px; }
.res-btn {
  padding: 15px; border-radius: var(--r-md);
  border: 1.5px solid var(--border); background: var(--card);
  color: var(--text); font-size: 15px; font-weight: 700;
  cursor: pointer; font-family: inherit; transition: all .15s; width: 100%;
  box-shadow: var(--shadow);
}
.res-btn:active { transform: scale(.97); }
.res-btn.primary { background: #4f9cf9; border-color: #4f9cf9; color: #fff; box-shadow: 0 6px 20px -6px rgba(79,156,249,.5); }

.wrong-review { padding: 0 14px; }
.wrong-review h3 {
  font-size: 12px; font-weight: 800; letter-spacing: .8px; text-transform: uppercase;
  color: var(--dim); margin-bottom: 10px;
}
.wrong-item {
  padding: 12px 13px; border-radius: var(--r-sm);
  background: var(--card); border: 1px solid var(--border);
  border-left: 3px solid var(--wrong); margin-bottom: 8px;
  box-shadow: var(--shadow);
}
.wrong-q    { font-size: 13px; font-weight: 600; color: var(--dim); margin-bottom: 4px; }
.wrong-a    { font-size: 13px; color: var(--text); }
.wrong-your { font-size: 12px; color: var(--wrong); margin-top: 4px; }

/* ── ANIMATIONS ───────────────────────────────────────── */
@keyframes fadeIn { from{opacity:0}to{opacity:1} }