/* =========================================================
   PVZ FUSION DEFENSE BUILDER — STYLE
   Bảng màu: "Nhà kính bản vẽ" — nền kem sáng, mực forest green,
   điểm nhấn mặt trời vàng và cảnh báo san hô. Dark mode chuyển
   sang "vườn đêm" xanh than với neon lime.
   ========================================================= */

:root{
  --cream:#FAF7EE;
  --panel:#FFFFFF;
  --forest:#1F3D2B;
  --forest-soft:#2E5940;
  --leaf:#4C8C4A;
  --leaf-light:#7FBF7A;
  --sun:#F2B705;
  --sun-soft:#FCE4A0;
  --coral:#E8543E;
  --line:#DCE7DA;
  --line-strong:#B9CDB7;
  --ink:#1B2A20;
  --ink-soft:#5B6B60;
  --radius-sm:8px;
  --radius-md:14px;
  --radius-lg:22px;
  --shadow-sm:0 1px 3px rgba(31,61,43,.08);
  --shadow-md:0 8px 24px rgba(31,61,43,.12);
  --font-display:"Be Vietnam Pro", system-ui, sans-serif;
  --font-mono:"JetBrains Mono", ui-monospace, monospace;
  --anim-speed:1;
}

html[data-theme="dark"]{
  --cream:#0E1912;
  --panel:#16261C;
  --forest:#EAF5EA;
  --forest-soft:#CFEBD1;
  --leaf:#9FE870;
  --leaf-light:#C4F5A6;
  --sun:#F2C230;
  --sun-soft:#4A3E12;
  --coral:#FF6B52;
  --line:#233A29;
  --line-strong:#31502F;
  --ink:#E9F3EA;
  --ink-soft:#9FB6A6;
  --shadow-sm:0 1px 3px rgba(0,0,0,.35);
  --shadow-md:0 10px 28px rgba(0,0,0,.45);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--cream);
  color:var(--ink);
  font-family:var(--font-display);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{font-family:var(--font-display);color:var(--forest);margin:0 0 .4em}
h1{font-size:clamp(1.6rem,4vw,2.4rem);font-weight:800;letter-spacing:-.01em}
h2{font-size:1.05rem;font-weight:700}
p{margin:0 0 .8em;color:var(--ink-soft)}
button{font-family:inherit}
input,select{font-family:inherit;color:var(--ink)}
::selection{background:var(--leaf-light);color:var(--forest)}
:focus-visible{outline:3px solid var(--sun);outline-offset:2px;border-radius:4px}

.skip-link{position:absolute;left:-9999px;top:0;background:var(--forest);color:#fff;padding:.6em 1em;z-index:200;border-radius:0 0 8px 0}
.skip-link:focus{left:0}

/* ---------- Shell / Layout ---------- */
.app-shell{min-height:100vh;display:flex;flex-direction:column}
.topbar{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;gap:.75rem;
  padding:.6rem .9rem;
  background:var(--panel);
  border-bottom:1px solid var(--line);
}
.icon-btn{
  width:40px;height:40px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:var(--panel);color:var(--forest);
  display:grid;place-items:center;cursor:pointer;flex:none;
  transition:transform .15s ease,background .15s ease;
}
.icon-btn svg{width:20px;height:20px}
.icon-btn:hover{background:var(--sun-soft);transform:translateY(-1px)}
.icon-btn.sm{width:32px;height:32px;font-size:.9rem}

.nav-toggle{display:none}

.brand{display:flex;align-items:center;gap:.5rem;margin-right:auto}
.brand-mark svg{width:30px;height:30px;display:block}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text strong{font-weight:800;color:var(--forest);font-size:.95rem}
.brand-text em{font-style:normal;color:var(--ink-soft);font-size:.72rem;letter-spacing:.04em;text-transform:uppercase}

.topbar-stats{display:flex;gap:.5rem}
.chip{
  display:flex;align-items:center;gap:.35rem;
  background:var(--cream);border:1px solid var(--line);
  padding:.35rem .7rem;border-radius:999px;
  font-family:var(--font-mono);font-size:.82rem;font-weight:600;color:var(--forest);
}
.chip-icon{font-size:.9rem}
.chip-sun{border-color:var(--sun)}
.chip-dps{border-color:var(--coral);display:none}
@media(min-width:640px){.chip-dps{display:flex}}

.body-row{display:flex;flex:1;min-height:0}

/* ---------- Side nav ---------- */
.sidenav{
  width:230px;flex:none;background:var(--panel);
  border-right:1px solid var(--line);
  padding:1rem .75rem;display:flex;flex-direction:column;gap:1rem;
}
.sidenav ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.2rem}
.nav-link{
  display:flex;align-items:center;gap:.6rem;
  width:100%;text-align:left;padding:.6rem .7rem;border-radius:var(--radius-sm);
  border:1px solid transparent;background:transparent;color:var(--ink);
  font-weight:600;font-size:.92rem;cursor:pointer;
}
.nav-link:hover{background:var(--cream)}
.nav-link.active{background:var(--forest);color:#fff}
html[data-theme="dark"] .nav-link.active{color:var(--forest)}
.nav-ico{font-size:1.05rem}
.sidenav-foot p{font-size:.75rem;color:var(--ink-soft);margin:0}
.nav-scrim{display:none}

/* ---------- Main ---------- */
main{flex:1;min-width:0;padding:1.1rem 1.1rem 5rem}
@media(min-width:900px){main{padding:1.6rem 2rem 2rem}}
.view[hidden]{display:none}

/* ---------- Bottom nav (mobile) ---------- */
.bottom-nav{
  position:fixed;bottom:0;left:0;right:0;z-index:60;
  display:flex;background:var(--panel);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.bn-link{
  flex:1;display:flex;flex-direction:column;align-items:center;gap:.15rem;
  padding:.5rem 0;border:0;background:transparent;color:var(--ink-soft);font-size:.65rem;font-weight:600;
}
.bn-link span{font-size:1.15rem}
.bn-link.active{color:var(--forest)}
@media(min-width:900px){.bottom-nav{display:none}}

/* ---------- Hero / Home ---------- */
.hero{
  display:grid;gap:1.5rem;
  background:linear-gradient(160deg,var(--panel),var(--cream));
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:1.6rem;margin-bottom:1.5rem;box-shadow:var(--shadow-sm);
}
@media(min-width:860px){.hero{grid-template-columns:1.2fr .8fr;align-items:center;padding:2.4rem}}
.eyebrow{
  text-transform:uppercase;letter-spacing:.12em;font-size:.72rem;font-weight:700;
  color:var(--leaf);margin-bottom:.5rem;
}
.hero-copy h1{margin-bottom:.5rem}
.lede{max-width:52ch}
.hero-actions{display:flex;gap:.7rem;flex-wrap:wrap;margin-top:1rem}

.hero-plot{display:flex;justify-content:center}
.plot-grid{
  display:grid;grid-template-columns:repeat(5,1fr);gap:6px;
  background:var(--forest);padding:10px;border-radius:var(--radius-md);
  box-shadow:var(--shadow-md);
}
.plot-grid span{
  width:38px;height:38px;background:rgba(255,255,255,.08);
  border-radius:6px;display:grid;place-items:center;font-size:1.1rem;
}
.plot-grid .seed{background:rgba(255,255,255,.18)}
.plot-grid .pulse{animation:pulse 1.6s ease-in-out infinite}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.15)}}

.feature-grid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.feature-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:1.1rem;box-shadow:var(--shadow-sm);
}
.feature-num{
  display:inline-block;font-family:var(--font-mono);font-weight:700;color:var(--leaf);
  background:var(--cream);border-radius:6px;padding:.1rem .5rem;font-size:.78rem;margin-bottom:.5rem;
}
.feature-card h3{font-size:1rem;margin-bottom:.3rem}
.feature-card p{font-size:.86rem;margin:0}

/* ---------- Buttons ---------- */
.btn{
  border:1px solid var(--forest);background:var(--forest);color:#fff;
  padding:.65rem 1.1rem;border-radius:999px;font-weight:700;font-size:.88rem;
  cursor:pointer;transition:transform .12s ease, box-shadow .12s ease;
}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.btn-ghost{background:transparent;color:var(--forest);border-color:var(--line-strong)}
.btn-accent{background:var(--sun);border-color:var(--sun);color:var(--forest)}
.btn-sm{padding:.42rem .8rem;font-size:.8rem;border-radius:999px}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}

/* ---------- Builder toolbar ---------- */
.builder-toolbar{
  display:flex;flex-wrap:wrap;gap:.8rem;align-items:end;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:.8rem;margin-bottom:1rem;
}
.tool-group{display:flex;flex-direction:column;gap:.25rem}
.tool-group-grow{flex:1;min-width:180px}
.field-label{font-size:.72rem;font-weight:700;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.05em}
.select{
  border:1px solid var(--line-strong);background:var(--cream);color:var(--ink);
  border-radius:var(--radius-sm);padding:.5rem .6rem;font-size:.85rem;
}
.tool-actions{flex-direction:row;align-items:center;gap:.35rem;margin-left:auto}
.zoom-value{font-family:var(--font-mono);font-size:.78rem;color:var(--ink-soft);min-width:3.2em;text-align:center}

/* ---------- Builder layout ---------- */
.builder-layout{display:grid;gap:1rem;grid-template-columns:1fr}
@media(min-width:980px){.builder-layout{grid-template-columns:230px minmax(0,1fr) 300px}}

.library-rail{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-md);
  display:flex;flex-direction:column;max-height:520px;overflow:hidden;
}
.rail-tabs{display:flex}
.rail-tab{flex:1;padding:.65rem;border:0;background:var(--cream);color:var(--ink-soft);font-weight:700;cursor:pointer;font-size:.82rem}
.rail-tab.active{background:var(--panel);color:var(--forest);box-shadow:inset 0 -2px 0 var(--leaf)}
.rail-search{padding:.5rem}
.rail-search input{width:100%;padding:.5rem .6rem;border-radius:var(--radius-sm);border:1px solid var(--line-strong);background:var(--cream)}
.rail-filters{display:flex;flex-wrap:wrap;gap:.3rem;padding:0 .5rem .5rem}
.filter-chip{
  border:1px solid var(--line-strong);background:var(--cream);color:var(--ink-soft);
  border-radius:999px;padding:.22rem .6rem;font-size:.7rem;font-weight:700;cursor:pointer;
}
.filter-chip.active{background:var(--leaf);border-color:var(--leaf);color:#fff}
.rail-list{overflow-y:auto;padding:.4rem;display:flex;flex-direction:column;gap:.4rem}
.rail-item{
  display:flex;align-items:center;gap:.5rem;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:.4rem .5rem;background:var(--cream);cursor:grab;font-size:.8rem;
}
.rail-item:active{cursor:grabbing}
.rail-item .ri-icon{font-size:1.3rem;flex:none}
.rail-item .ri-body{min-width:0}
.rail-item .ri-name{font-weight:700;color:var(--forest);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rail-item .ri-meta{font-family:var(--font-mono);font-size:.7rem;color:var(--ink-soft)}

/* ---------- Stage / Grid ---------- */
.stage{position:relative;display:flex;flex-direction:column;gap:.6rem;min-width:0}
.stage-scroll{overflow:auto;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--panel);padding:.8rem}
.grid-zoom-wrap{display:inline-block;transform-origin:top left;transition:transform .15s ease}

.battle-grid{
  display:grid;gap:4px;
  background:var(--forest);padding:8px;border-radius:var(--radius-sm);
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
}
.battle-grid.map-day{background-color:#3E7A3F}
.battle-grid.map-night{background-color:#1A2333}
.battle-grid.map-pool{background-color:#2678A6}
.battle-grid.map-fog{background-color:#4B5A63}
.battle-grid.map-roof{background-color:#7A4B33}
.battle-grid.map-fusion{background-color:#3B2A63}
.battle-grid.no-grid-lines{background-image:none}

.cell{
  position:relative;width:56px;height:56px;background:rgba(255,255,255,.08);
  border-radius:6px;display:grid;place-items:center;cursor:pointer;
  font-size:1.5rem;user-select:none;transition:background .12s ease;
}
.cell:hover{background:rgba(255,255,255,.2)}
.cell.locked{outline:2px dashed var(--sun)}
.cell.fusion-eligible{box-shadow:0 0 0 3px var(--sun) inset}
.cell.heat-cell::after{
  content:"";position:absolute;inset:0;border-radius:6px;pointer-events:none;
  background:var(--heat-color, transparent);opacity:.55;
}
.cell .coord{position:absolute;top:2px;left:3px;font-size:.55rem;font-family:var(--font-mono);color:rgba(255,255,255,.55)}
.cell .stars{position:absolute;bottom:1px;font-size:.5rem;letter-spacing:-1px;color:var(--sun)}
.cell .lock-ico{position:absolute;top:2px;right:3px;font-size:.6rem}
.cell.marquee-selected{outline:2px solid var(--coral)}

.fusion-banner{
  display:flex;align-items:center;gap:.6rem;flex-wrap:wrap;
  background:var(--sun-soft);border:1px solid var(--sun);border-radius:var(--radius-sm);
  padding:.6rem .8rem;font-size:.85rem;font-weight:600;color:var(--forest);
}
.fusion-banner button{margin-left:auto}

.minimap{
  display:none;position:absolute;bottom:.6rem;right:.6rem;
  background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:4px;
  grid-template-columns:repeat(var(--mm-cols,9),6px);gap:2px;
}
.minimap span{width:6px;height:6px;border-radius:1px;background:var(--line)}
.minimap span.filled{background:var(--leaf)}
@media(min-width:980px){.minimap{display:grid}}

/* ---------- Info column / panels ---------- */
.info-col{display:flex;flex-direction:column;gap:1rem}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-md);padding:1rem;box-shadow:var(--shadow-sm)}
.rating-badge{
  width:46px;height:46px;border-radius:50%;background:var(--forest);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:1.2rem;margin-bottom:.6rem;
}
.stat-list{margin:0;display:grid;grid-template-columns:1fr 1fr;gap:.5rem .8rem}
.stat-list div{background:var(--cream);border-radius:8px;padding:.4rem .55rem}
.stat-list dt{font-size:.66rem;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.03em}
.stat-list dd{margin:0;font-family:var(--font-mono);font-weight:700;color:var(--forest);font-size:1rem}

.check-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.4rem;font-size:.82rem}
.check-list li{display:flex;gap:.4rem;align-items:flex-start}
.check-list li.ok{color:var(--leaf)}
.check-list li.warn{color:var(--coral)}

.sim-controls{display:flex;gap:.4rem;flex-wrap:wrap;margin-bottom:.6rem}
.sim-track{position:relative;height:46px;background:var(--cream);border-radius:8px;overflow:hidden;border:1px solid var(--line)}
.sim-zombie{position:absolute;right:6px;top:50%;transform:translateY(-50%);font-size:1.4rem;transition:right linear}
.sim-verdict{font-weight:700;margin:.5rem 0 0}

.ai-result{margin-top:.7rem;font-size:.85rem;display:flex;flex-direction:column;gap:.5rem}
.ai-result h4{margin:.2rem 0 0;font-size:.8rem;color:var(--forest)}
.ai-result ul{margin:.2rem 0;padding-left:1.1rem}

.save-row{display:flex;gap:.4rem;margin-bottom:.6rem}
.save-row input{flex:1;padding:.5rem .6rem;border-radius:8px;border:1px solid var(--line-strong);background:var(--cream)}
.save-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.4rem;max-height:200px;overflow-y:auto}
.save-list li{display:flex;align-items:center;gap:.4rem;background:var(--cream);border-radius:8px;padding:.4rem .55rem;font-size:.8rem}
.save-list .sv-name{flex:1;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.save-list button{border:0;background:transparent;cursor:pointer;font-size:.9rem;color:var(--ink-soft)}
.save-list button:hover{color:var(--forest)}

/* ---------- Library pages ---------- */
.view-head{margin-bottom:1rem}
.library-toolbar{display:flex;flex-direction:column;gap:.6rem;margin-bottom:1rem}
.library-toolbar input[type=search]{padding:.6rem .8rem;border-radius:999px;border:1px solid var(--line-strong);background:var(--panel);max-width:360px}
.filter-row{display:flex;flex-wrap:wrap;gap:.4rem}

.card-grid{display:grid;gap:.9rem;grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
.entity-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:1rem;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:.4rem;
}
.entity-card .ec-top{display:flex;align-items:center;gap:.6rem}
.entity-card .ec-icon{font-size:2rem}
.entity-card h3{margin:0;font-size:1rem}
.entity-card .ec-tag{
  font-size:.65rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;
  color:var(--leaf);background:var(--cream);border-radius:6px;padding:.1rem .4rem;align-self:flex-start;
}
.entity-card .ec-stats{display:flex;flex-wrap:wrap;gap:.4rem;font-family:var(--font-mono);font-size:.72rem;color:var(--ink-soft)}
.entity-card p{font-size:.8rem;margin:0}

/* ---------- Map view ---------- */
.map-choice-grid{display:grid;gap:.8rem;grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}
.map-choice{
  border:2px solid var(--line);border-radius:var(--radius-md);padding:1rem;text-align:center;cursor:pointer;
  background:var(--panel);font-weight:700;color:var(--forest);
}
.map-choice.active{border-color:var(--leaf);box-shadow:var(--shadow-sm)}
.map-swatch{height:50px;border-radius:8px;margin-bottom:.5rem}
.grid-size-grid{display:flex;gap:.7rem;flex-wrap:wrap}
.grid-size-choice{
  border:2px solid var(--line);border-radius:var(--radius-md);padding:.9rem 1.2rem;cursor:pointer;
  background:var(--panel);font-weight:700;color:var(--forest);
}
.grid-size-choice.active{border-color:var(--leaf)}

/* ---------- IO view ---------- */
.io-grid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.io-btn-row{display:flex;flex-wrap:wrap;gap:.5rem}
.hint{font-size:.78rem;margin-top:.5rem}
.qr-holder{margin-top:.8rem}
.qr-holder img,.qr-holder canvas{max-width:180px;border-radius:8px;border:1px solid var(--line)}

/* ---------- Settings ---------- */
.settings-list{display:flex;flex-direction:column;gap:.6rem}
.switch-row{
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);padding:.7rem .9rem;font-weight:600;font-size:.88rem;
}
.switch-row input[type=checkbox]{position:absolute;opacity:0;width:0;height:0}
.switch{
  width:42px;height:24px;border-radius:999px;background:var(--line-strong);position:relative;flex:none;transition:background .15s ease;
}
.switch::after{content:"";position:absolute;top:2px;left:2px;width:20px;height:20px;border-radius:50%;background:#fff;transition:transform .15s ease}
input:checked + .switch{background:var(--leaf)}
input:checked + .switch::after{transform:translateX(18px)}

/* ---------- Toasts ---------- */
.toast-stack{position:fixed;bottom:70px;left:50%;transform:translateX(-50%);z-index:300;display:flex;flex-direction:column;gap:.5rem;align-items:center}
@media(min-width:900px){.toast-stack{bottom:20px}}
.toast{
  background:var(--forest);color:#fff;padding:.6rem 1rem;border-radius:999px;font-size:.82rem;font-weight:600;
  box-shadow:var(--shadow-md);animation:toastIn .2s ease;
}
@keyframes toastIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* ---------- Context menu ---------- */
.context-menu{
  position:fixed;z-index:400;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);
  box-shadow:var(--shadow-md);padding:.3rem;display:flex;flex-direction:column;min-width:160px;
}
.context-menu button{border:0;background:transparent;text-align:left;padding:.45rem .6rem;border-radius:6px;font-size:.82rem;cursor:pointer;color:var(--ink)}
.context-menu button:hover{background:var(--cream)}

/* ---------- Responsive nav ---------- */
@media(max-width:899px){
  .nav-toggle{display:grid}
  .sidenav{
    position:fixed;top:0;left:0;bottom:0;z-index:120;
    transform:translateX(-100%);transition:transform .2s ease;box-shadow:var(--shadow-md);
  }
  .sidenav.open{transform:translateX(0)}
  .nav-scrim{
    display:none;position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:110;
  }
  .nav-scrim.open{display:block}
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
}
body.no-animation *{animation:none !important;transition:none !important}