:root{
  --red:#ef1119;
  --black:#050505;
  --white:#f7f3ee;
  --line:rgba(0,0,0,.22);
}

*{box-sizing:border-box}

html,body{
  margin:0;
  min-height:100%;
  background:var(--red);
  color:var(--black);
  font-family:Inter,Arial,sans-serif;
}

body{
  min-height:100vh;
}

button,input{
  font:inherit;
}

button{
  color:inherit;
}

.page{
  width:min(1500px,100%);
  margin:0 auto;
  min-height:100vh;
  padding:22px 26px 28px;
}

.topbar{
  display:flex;
  align-items:flex-start;
  min-height:86px;
  border-bottom:1px solid var(--line);
}

.brand{
  color:var(--black);
  text-decoration:none;
  font-size:clamp(2.6rem,5.2vw,5rem);
  font-weight:900;
  line-height:.82;
  letter-spacing:.08em;
}

.app-shell{
  width:min(980px,100%);
  margin:42px auto 0;
}

.preview-card{
  position:relative;
  width:100%;
  aspect-ratio:4/3;
  padding:0;
  border:0;
  background:#111;
  overflow:hidden;
  cursor:pointer;
  display:block;
}

.preview-card:focus-visible{
  outline:3px solid var(--black);
  outline-offset:4px;
}

.preview-card::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  background:
    radial-gradient(circle at 75% 18%,rgba(255,255,255,.15),transparent 25%),
    linear-gradient(145deg,#ff272f 0%,#ea0b14 54%,#8a0008 100%);
}

.empty-state{
  position:absolute;
  inset:0;
  z-index:2;
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  justify-content:flex-end;
  padding:34px;
  text-align:left;
}

.upload-mark{
  margin-bottom:auto;
  font-size:clamp(3rem,7vw,6rem);
  font-weight:400;
  line-height:1;
}

.empty-title{
  font-size:clamp(2.3rem,6vw,5.6rem);
  line-height:.88;
  letter-spacing:-.055em;
  font-weight:900;
}

.empty-copy{
  margin-top:12px;
  font-weight:700;
}

.empty-meta{
  margin-top:22px;
  font-size:.72rem;
  font-weight:800;
  letter-spacing:.14em;
}

#previewCanvas{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  display:none;
  z-index:3;
}

.preview-overlay{
  position:absolute;
  inset:0;
  z-index:4;
  display:none;
  align-items:center;
  justify-content:center;
  background:rgba(0,0,0,.25);
  color:white;
  font-size:.8rem;
  font-weight:900;
  letter-spacing:.12em;
  opacity:0;
  transition:opacity .18s ease;
  pointer-events:none;
}

.preview-card.has-image:hover .preview-overlay{
  opacity:1;
}

.controls-panel{
  padding-top:22px;
}

.controls{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
}

.control{
  display:block;
  border-top:1px solid var(--line);
  padding-top:12px;
}

.control>span{
  display:flex;
  justify-content:space-between;
  gap:14px;
  margin-bottom:10px;
  font-size:.82rem;
}

.control output{
  font-weight:800;
}

input[type="range"]{
  width:100%;
  accent-color:var(--black);
}

.actions{
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:10px;
  margin-top:24px;
}

.primary-btn,
.secondary-btn{
  min-height:60px;
  border:1px solid var(--black);
  padding:0 18px;
  cursor:pointer;
  font-weight:900;
  letter-spacing:.08em;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:14px;
  transition:.18s ease;
}

.primary-btn{
  background:var(--black);
  color:var(--white);
}

.primary-btn:not(:disabled):hover{
  transform:translateY(-2px);
  background:var(--white);
  color:var(--black);
}

.secondary-btn{
  background:transparent;
}

.secondary-btn:not(:disabled):hover{
  background:rgba(255,255,255,.14);
}

button:disabled{
  opacity:.35;
  cursor:not-allowed;
}

.preview-card.dragging{
  outline:3px solid var(--black);
  outline-offset:4px;
}

@media (max-width: 900px){
  .page{
    padding:18px;
  }

  .topbar{
    min-height:72px;
  }

  .app-shell{
    margin-top:28px;
  }

  .controls{
    grid-template-columns:1fr;
    gap:16px;
  }
}

@media (max-width: 640px){
  .page{
    padding:14px 14px 22px;
  }

  .topbar{
    min-height:62px;
  }

  .brand{
    font-size:2.7rem;
  }

  .app-shell{
    margin-top:20px;
  }

  .preview-card{
    aspect-ratio:3/4;
  }

  .empty-state{
    padding:22px;
  }

  .empty-title{
    font-size:2.8rem;
  }

  .empty-copy{
    max-width:220px;
    line-height:1.35;
  }

  .controls-panel{
    padding-top:18px;
  }

  .actions{
    grid-template-columns:1fr;
    gap:10px;
  }

  .primary-btn,
  .secondary-btn{
    min-height:56px;
  }

  .preview-card.has-image .preview-overlay{
    display:none !important;
  }
}

@media (max-width: 380px){
  .page{
    padding-inline:10px;
  }

  .brand{
    font-size:2.35rem;
  }

  .empty-title{
    font-size:2.35rem;
  }
}