/* ============ RESET & BASE ============ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
:root{
  --bg-0:#0a0d12;
  --bg-1:#11151c;
  --bg-2:#171c25;
  --bg-3:#1f2631;
  --border:#2a323f;
  --text:#e6edf3;
  --text-dim:#8b95a7;
  --accent:#00ff66;
  --accent-dim:#00b347;
  --accent-glow:rgba(0,255,102,.35);
  --danger:#ff4757;
  --warn:#ffa502;
  --info:#3498db;
  --glass:rgba(23,28,37,.72);
  --glass-border:rgba(255,255,255,.08);
  --shadow:0 10px 30px rgba(0,0,0,.45);
  --radius:12px;
  --radius-sm:8px;
  --radius-lg:18px;
}
html,body{height:100%;overflow:hidden}
body{
  font-family:'Inter',system-ui,-apple-system,sans-serif;
  background:radial-gradient(1200px 600px at 20% -10%,rgba(0,255,102,.06),transparent 60%),var(--bg-0);
  color:var(--text);
  font-size:14px;
  line-height:1.4;
  overscroll-behavior:none;
}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,select,textarea{font-family:inherit;color:inherit}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--bg-3);border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:var(--accent-dim)}

/* ============ APP LAYOUT ============ */
.app{display:flex;flex-direction:column;height:100vh;height:100dvh;width:100vw}

/* HEADER */
.header{
  display:flex;align-items:center;gap:10px;
  padding:10px 14px;
  background:var(--bg-1);
  border-bottom:1px solid var(--border);
  flex-shrink:0;
  z-index:50;
}
.logo{
  display:flex;align-items:center;gap:8px;font-weight:700;
  font-family:'Orbitron',sans-serif;letter-spacing:1px;
}
.logo-mark{
  width:32px;height:32px;border-radius:8px;
  background:linear-gradient(135deg,var(--accent),var(--accent-dim));
  display:grid;place-items:center;color:#001a0b;font-weight:900;
  box-shadow:0 0 18px var(--accent-glow);
}
.logo-text{font-size:14px}
.logo-text small{display:block;font-size:9px;color:var(--text-dim);font-family:'Inter';letter-spacing:2px;font-weight:500}
.project-title{
  flex:1;min-width:0;
  background:var(--bg-2);border:1px solid var(--border);
  padding:7px 10px;border-radius:var(--radius-sm);
  font-size:13px;color:var(--text);outline:none;
  transition:border-color .2s;
}
.project-title:focus{border-color:var(--accent)}
.header-actions{display:flex;gap:6px;align-items:center}
.btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:8px 12px;border-radius:var(--radius-sm);
  background:var(--bg-2);border:1px solid var(--border);
  font-size:12px;font-weight:500;
  transition:all .15s ease;white-space:nowrap;
}
.btn:hover{background:var(--bg-3);border-color:var(--accent-dim)}
.btn.primary{background:var(--accent);color:#001a0b;border-color:var(--accent);font-weight:600}
.btn.primary:hover{background:#33ff85;box-shadow:0 0 16px var(--accent-glow)}
.btn.ghost{background:transparent}
.btn.danger:hover{background:var(--danger);color:#fff;border-color:var(--danger)}
.btn-icon{padding:8px;width:34px;height:34px;justify-content:center}
.btn svg{width:14px;height:14px}

/* SPLIT SAVE BUTTON */
.save-split{position:relative;display:inline-flex;}
.save-split .save-main{
  border-top-right-radius:0;border-bottom-right-radius:0;
  border-right:none;
}
.save-split .save-arrow{
  display:inline-flex;align-items:center;justify-content:center;
  padding:0 8px;
  background:var(--bg-2);border:1px solid var(--border);
  border-top-right-radius:var(--radius-sm);border-bottom-right-radius:var(--radius-sm);
  cursor:pointer;transition:all .15s ease;
  font-size:10px;
}
.save-split .save-arrow:hover{background:var(--bg-3);border-color:var(--accent-dim);}
.save-split .save-dropdown{
  position:absolute;top:calc(100% + 4px);left:0;min-width:180px;
  background:var(--bg-2);border:1px solid var(--border);
  border-radius:var(--radius-sm);box-shadow:0 8px 24px rgba(0,0,0,.5);
  z-index:9999;display:none;flex-direction:column;overflow:hidden;
}
.save-split .save-dropdown.open{display:flex;}
.save-dropdown-item{
  display:flex;align-items:center;gap:8px;
  padding:10px 14px;font-size:12px;font-weight:500;
  cursor:pointer;transition:background .12s;
  border:none;background:transparent;color:var(--text);text-align:left;width:100%;
}
.save-dropdown-item:hover{background:var(--bg-3);}
.save-dropdown-item .badge{
  font-size:10px;font-weight:700;padding:2px 6px;border-radius:4px;
  margin-left:auto;
}
.badge-hd{background:#1a3cff22;color:#6699ff;border:1px solid #6699ff44;}
.badge-sd{background:#ff6a0022;color:#ff9966;border:1px solid #ff996644;}
.save-dropdown-sep{height:1px;background:var(--border);margin:0;}

/* MAIN GRID */
.main{
  flex:1;min-height:0;
  display:grid;
  grid-template-columns:56px 1fr 320px;
  grid-template-rows:1fr auto;
  grid-template-areas:
    "left canvas right"
    "timeline timeline timeline";
  gap:0;
  background:var(--bg-0);
}

/* LEFT TOOLBAR */
.toolbar{
  grid-area:left;
  background:var(--bg-1);
  border-right:1px solid var(--border);
  display:flex;flex-direction:column;align-items:center;
  padding:10px 0;gap:4px;
  overflow-y:auto;
}
.tool-btn{
  width:40px;height:40px;border-radius:var(--radius-sm);
  display:grid;place-items:center;color:var(--text-dim);
  transition:all .15s;position:relative;
}
.tool-btn:hover{background:var(--bg-3);color:var(--text)}
.tool-btn.active{background:var(--accent);color:#001a0b;box-shadow:0 0 12px var(--accent-glow)}
.tool-btn svg{width:18px;height:18px}
.tool-sep{width:24px;height:1px;background:var(--border);margin:6px 0}

/* CANVAS AREA */
.canvas-area{
  grid-area:canvas;
  display:flex;align-items:center;justify-content:center;
  padding:16px;
  background:
    linear-gradient(45deg,#0d1117 25%,transparent 25%),
    linear-gradient(-45deg,#0d1117 25%,transparent 25%),
    linear-gradient(45deg,transparent 75%,#0d1117 75%),
    linear-gradient(-45deg,transparent 75%,#0d1117 75%);
  background-size:20px 20px;
  background-position:0 0,0 10px,10px -10px,10px 0;
  background-color:#0a0d12;
  overflow:hidden;
  position:relative;
}
.canvas-wrap{
  position:relative;
  box-shadow:var(--shadow),0 0 0 1px var(--border);
  border-radius:4px;
  max-width:100%;max-height:100%;
  background:#000;
}
#preview{display:block;max-width:100%;max-height:100%;border-radius:4px;touch-action:none}
.canvas-info{
  position:absolute;top:24px;left:24px;
  background:var(--glass);backdrop-filter:blur(10px);
  border:1px solid var(--glass-border);
  padding:6px 10px;border-radius:6px;font-size:11px;
  color:var(--text-dim);pointer-events:none;
}
.canvas-overlay{
  position:absolute;inset:0;pointer-events:none;
}

/* RIGHT PANEL */
.panel{
  grid-area:right;
  background:var(--bg-1);
  border-left:1px solid var(--border);
  display:flex;flex-direction:column;
  min-height:0;
  overflow:hidden;
}
.panel-tabs{
  display:flex;border-bottom:1px solid var(--border);
  overflow-x:auto;flex-shrink:0;
  scrollbar-width:none;
}
.panel-tabs::-webkit-scrollbar{display:none}
.tab{
  padding:10px 12px;font-size:12px;font-weight:500;
  color:var(--text-dim);white-space:nowrap;
  border-bottom:2px solid transparent;
  transition:all .15s;
}
.tab:hover{color:var(--text)}
.tab.active{color:var(--accent);border-bottom-color:var(--accent)}
.panel-body{
  flex:1;overflow-y:auto;padding:14px;
}
.panel-section{display:none}
.panel-section.active{display:block;animation:fadeIn .2s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

.section-title{
  font-size:11px;text-transform:uppercase;letter-spacing:1.5px;
  color:var(--text-dim);margin:12px 0 8px;font-weight:600;
  display:flex;align-items:center;gap:6px;
}
.section-title:first-child{margin-top:0}

.field{margin-bottom:12px}
.field-label{
  display:flex;justify-content:space-between;align-items:center;
  font-size:11px;color:var(--text-dim);margin-bottom:6px;
  text-transform:uppercase;letter-spacing:.5px;
}
.field-label .val{color:var(--accent);font-weight:600}

.input,.select,.textarea{
  width:100%;background:var(--bg-2);
  border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:8px 10px;font-size:13px;outline:none;
  transition:border-color .15s;
}
.input:focus,.select:focus,.textarea:focus{border-color:var(--accent)}
.textarea{resize:vertical;min-height:60px;font-family:inherit}

.row{display:flex;gap:8px;align-items:center}
.row > *{flex:1}

/* RANGE SLIDER */
.slider-wrap{display:flex;align-items:center;gap:8px}
input[type=range]{
  -webkit-appearance:none;appearance:none;
  flex:1;height:4px;border-radius:2px;
  background:var(--bg-3);outline:none;
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;appearance:none;
  width:14px;height:14px;border-radius:50%;
  background:var(--accent);cursor:pointer;
  box-shadow:0 0 8px var(--accent-glow);
  transition:transform .1s;
}
input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.2)}
input[type=range]::-moz-range-thumb{
  width:14px;height:14px;border-radius:50%;
  background:var(--accent);cursor:pointer;border:none;
  box-shadow:0 0 8px var(--accent-glow);
}
.slider-val{
  min-width:36px;text-align:right;font-size:11px;
  color:var(--accent);font-weight:600;
}

/* COLOR PICKER */
.color-row{display:flex;gap:8px;align-items:center}
.color-input{
  width:36px;height:36px;border-radius:var(--radius-sm);
  border:1px solid var(--border);background:var(--bg-2);
  cursor:pointer;padding:2px;
}
.color-input::-webkit-color-swatch-wrapper{padding:0}
.color-input::-webkit-color-swatch{border:none;border-radius:4px}

/* BUTTON GROUP */
.btn-group{display:flex;gap:4px;flex-wrap:wrap}
.btn-group .btn{flex:1;min-width:0;padding:7px 8px;font-size:11px}
.btn-group .btn.active{background:var(--accent);color:#001a0b;border-color:var(--accent)}

/* TEMPLATES GRID */
.templates-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
.tpl-card{
  background:var(--bg-2);border:1px solid var(--border);
  border-radius:var(--radius-sm);padding:10px 8px;
  text-align:center;font-size:11px;font-weight:600;
  cursor:pointer;transition:all .15s;
  min-height:56px;display:flex;align-items:center;justify-content:center;
}
.tpl-card:hover{border-color:var(--accent);transform:translateY(-1px)}
.tpl-card.active{background:var(--accent);color:#001a0b;border-color:var(--accent)}

/* LAYERS LIST */
.layer-item{
  display:flex;align-items:center;gap:8px;
  background:var(--bg-2);border:1px solid var(--border);
  border-radius:var(--radius-sm);padding:8px;margin-bottom:6px;
  cursor:pointer;transition:all .15s;
}
.layer-item:hover{border-color:var(--accent-dim)}
.layer-item.active{border-color:var(--accent);background:rgba(0,255,102,.08)}
.layer-icon{
  width:28px;height:28px;border-radius:6px;
  background:var(--bg-3);display:grid;place-items:center;
  font-size:12px;font-weight:700;color:var(--accent);
}
.layer-info{flex:1;min-width:0}
.layer-name{font-size:12px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.layer-meta{font-size:10px;color:var(--text-dim)}
.layer-actions{display:flex;gap:2px}
.layer-actions button{
  width:24px;height:24px;border-radius:4px;
  display:grid;place-items:center;color:var(--text-dim);
  transition:all .15s;
}
.layer-actions button:hover{background:var(--bg-3);color:var(--text)}
.layer-actions button.danger:hover{color:var(--danger)}

/* TIMELINE */
.timeline{
  grid-area:timeline;
  background:var(--bg-1);
  border-top:1px solid var(--border);
  display:flex;flex-direction:column;
  min-height:160px;max-height:240px;
}
.timeline-toolbar{
  display:flex;align-items:center;gap:8px;
  padding:8px 12px;border-bottom:1px solid var(--border);
  flex-shrink:0;
}
.play-controls{display:flex;gap:4px;align-items:center}
.play-controls .btn-icon{width:30px;height:30px}
.time-display{
  font-family:'Orbitron',monospace;font-size:12px;
  color:var(--accent);background:var(--bg-2);
  padding:4px 10px;border-radius:4px;
  border:1px solid var(--border);
  min-width:110px;text-align:center;
}
.timeline-right{margin-left:auto;display:flex;gap:8px;align-items:center}
.timeline-right label{font-size:11px;color:var(--text-dim)}
.timeline-right select{
  background:var(--bg-2);border:1px solid var(--border);
  border-radius:4px;padding:4px 6px;font-size:11px;
}

.timeline-body{
  flex:1;min-height:0;display:flex;overflow:hidden;
}
.timeline-labels{
  width:140px;flex-shrink:0;
  background:var(--bg-2);border-right:1px solid var(--border);
  overflow-y:auto;
}
.tl-label{
  height:32px;display:flex;align-items:center;gap:6px;
  padding:0 10px;font-size:11px;border-bottom:1px solid var(--border);
}
.tl-label .dot{width:8px;height:8px;border-radius:50%;background:var(--accent)}
.timeline-tracks-wrap{
  flex:1;overflow:auto;position:relative;
}
.timeline-ruler{
  height:20px;position:sticky;top:0;z-index:2;
  background:var(--bg-2);border-bottom:1px solid var(--border);
}
.timeline-tracks{position:relative;min-width:100%}
.tl-track{
  height:32px;position:relative;
  border-bottom:1px solid var(--border);
  background:
    linear-gradient(90deg,transparent 0,transparent calc(100% - 1px),var(--border) calc(100% - 1px));
  background-size:40px 100%;
}
.tl-clip{
  position:absolute;top:4px;height:24px;
  background:linear-gradient(135deg,var(--accent),var(--accent-dim));
  border-radius:4px;cursor:grab;
  display:flex;align-items:center;padding:0 8px;
  font-size:10px;font-weight:600;color:#001a0b;
  overflow:hidden;white-space:nowrap;
  box-shadow:0 2px 6px rgba(0,0,0,.3);
  min-width:20px;
}
.tl-clip:active{cursor:grabbing}
.tl-clip .handle{
  position:absolute;top:0;bottom:0;width:6px;
  background:rgba(0,0,0,.3);cursor:ew-resize;
}
.tl-clip .handle.l{left:0;border-radius:4px 0 0 4px}
.tl-clip .handle.r{right:0;border-radius:0 4px 4px 0}
.tl-playhead{
  position:absolute;top:0;bottom:0;width:2px;
  background:var(--danger);pointer-events:none;z-index:3;
  box-shadow:0 0 8px rgba(255,71,87,.6);
}
.tl-playhead::before{
  content:'';position:absolute;top:-2px;left:-5px;
  width:12px;height:12px;background:var(--danger);
  border-radius:50%;box-shadow:0 0 8px rgba(255,71,87,.8);
}

/* MODAL */
.modal-backdrop{
  position:fixed;inset:0;background:rgba(0,0,0,.7);
  backdrop-filter:blur(6px);
  display:none;align-items:center;justify-content:center;
  z-index:100;padding:20px;
  animation:fadeIn .2s ease;
}
.modal-backdrop.open{display:flex}
.modal{
  background:var(--bg-1);border:1px solid var(--border);
  border-radius:var(--radius-lg);
  max-width:500px;width:100%;max-height:80vh;
  display:flex;flex-direction:column;
  box-shadow:var(--shadow);
  animation:slideUp .25s ease;
}
@keyframes slideUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}
.modal-header{
  padding:14px 18px;border-bottom:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;
}
.modal-title{font-size:15px;font-weight:600}
.modal-body{padding:18px;overflow-y:auto}
.modal-footer{
  padding:12px 18px;border-top:1px solid var(--border);
  display:flex;gap:8px;justify-content:flex-end;
}

/* TOAST */
.toast-wrap{
  position:fixed;bottom:20px;left:50%;transform:translateX(-50%);
  z-index:200;display:flex;flex-direction:column;gap:8px;
  pointer-events:none;
}
.toast{
  background:var(--glass);backdrop-filter:blur(12px);
  border:1px solid var(--glass-border);
  padding:10px 16px;border-radius:var(--radius);
  font-size:13px;box-shadow:var(--shadow);
  animation:toastIn .3s ease;
  display:flex;align-items:center;gap:8px;
}
.toast.success{border-left:3px solid var(--accent)}
.toast.error{border-left:3px solid var(--danger)}
.toast.info{border-left:3px solid var(--info)}
@keyframes toastIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* MOBILE BOTTOM SHEET */
.mobile-toggle{display:none}

/* RESPONSIVE */
@media (max-width:1024px){
  .main{grid-template-columns:56px 1fr 280px}
}
@media (max-width:768px){
  .header{padding:8px 10px;gap:6px;flex-wrap:wrap}
  .logo-text{display:none}
  .project-title{order:3;flex-basis:100%}
  .btn span{display:none}
  .btn{padding:8px}
  .main{
    grid-template-columns:1fr;
    grid-template-rows:auto 1fr auto;
    grid-template-areas:
      "canvas"
      "canvas"
      "timeline";
  }
  .toolbar{
    grid-area:unset;position:fixed;bottom:0;left:0;right:0;
    flex-direction:row;justify-content:space-around;
    height:56px;padding:0 8px;
    border-right:none;border-top:1px solid var(--border);
    z-index:40;
  }
  .tool-sep{display:none}
  .canvas-area{padding:8px;padding-bottom:64px}
  .panel{
    position:fixed;inset:auto 0 56px 0;
    height:60vh;z-index:45;
    transform:translateY(100%);
    transition:transform .3s ease;
    border-left:none;border-top:1px solid var(--border);
    border-radius:var(--radius-lg) var(--radius-lg) 0 0;
  }
  .panel.open{transform:translateY(0)}
  .mobile-toggle{
    display:flex;position:fixed;bottom:64px;right:12px;
    width:50px;height:50px;border-radius:50%;
    background:var(--accent);color:#001a0b;
    place-items:center;z-index:46;
    box-shadow:0 4px 16px var(--accent-glow);
  }
  .mobile-toggle svg{width:22px;height:22px}
  .timeline{min-height:120px;max-height:180px;margin-bottom:56px}
  .timeline-labels{width:90px}
  .tl-label{font-size:10px;padding:0 6px}
}
@media (max-width:480px){
  .templates-grid{grid-template-columns:repeat(3,1fr)}
  .tpl-card{font-size:10px;padding:8px 4px;min-height:48px}
}

/* UTILS */
.hidden{display:none !important}
.flex{display:flex}
.gap-8{gap:8px}
.mt-8{margin-top:8px}
.mb-8{margin-bottom:8px}
.text-center{text-align:center}
.text-accent{color:var(--accent)}
.divider{height:1px;background:var(--border);margin:12px 0}

/* Empty state */
.empty{
  text-align:center;padding:20px;color:var(--text-dim);
  font-size:12px;
}
.empty svg{width:32px;height:32px;margin-bottom:8px;opacity:.4}