/* ===== RESET & BASE ===== */
*{box-sizing:border-box;margin:0;padding:0}
body{background:#f0f4f8;color:#1e293b;font-family:'Segoe UI',system-ui,-apple-system,sans-serif;line-height:1.5;min-height:100vh}
::selection{background:#0ea5e9;color:#fff}
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:#7dd3fc;border-radius:99px}

/* ===== HEADER ===== */
.site-header{
  background:linear-gradient(135deg,#0f172a 0%,#1e293b 50%,#334155 100%);
  padding:12px 20px;
  position:sticky;top:0;z-index:10;
  box-shadow:0 4px 20px rgba(15,23,42,.3)
}
.brand{display:flex;align-items:center;gap:12px}
.logo{
  font-size:22px;font-weight:900;text-decoration:none;
  background:linear-gradient(135deg,#38bdf8 0%,#818cf8 50%,#f0abfc 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
  filter:drop-shadow(0 1px 2px rgba(0,0,0,.15))
}
.tagline{font-size:11.5px;color:rgba(255,255,255,.6)}
.home-link{
  margin-left:auto;
  color:#38bdf8;font-size:13px;font-weight:700;
  text-decoration:none;
  border:1px solid rgba(56,189,248,.3);border-radius:8px;
  padding:5px 12px;
  transition:all .2s
}
.home-link:hover{background:rgba(56,189,248,.1);border-color:#38bdf8}

/* ===== PAGE ===== */
.page{width:min(1360px,calc(100% - 20px));margin:0 auto;padding:12px 0 40px}

/* ===== HERO ===== */
.hero{
  background:linear-gradient(135deg,#0f172a 0%,#1e293b 50%,#334155 100%);
  border-radius:14px;padding:14px 22px;
  text-align:center;margin-bottom:12px;
  position:relative;overflow:hidden;
  box-shadow:0 4px 20px rgba(15,23,42,.3)
}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 15% 0%,rgba(99,102,241,.15),transparent 50%),radial-gradient(ellipse at 85% 100%,rgba(56,189,248,.1),transparent 40%);pointer-events:none}
.hero h1{font-size:20px;font-weight:800;color:#fff;margin:0 0 4px;position:relative;z-index:1}
.hero p{max-width:700px;margin:0 auto;color:rgba(255,255,255,.7);font-size:12px;line-height:1.4;position:relative;z-index:1}

/* ===== CARDS ===== */
.tool-card,
.tool-panel,
.seo-content{
  background:#fff;
  border:1px solid #e2e8f0;border-radius:14px;
  box-shadow:0 2px 10px rgba(0,0,0,.04);
  overflow:hidden
}
.tool-card{padding:14px;margin-bottom:12px}

/* ===== UPLOAD BOX ===== */
.upload-box{
  border:2px dashed #7dd3fc;border-radius:14px;
  min-height:140px;display:grid;place-items:center;
  text-align:center;padding:20px;
  background:linear-gradient(180deg,#f0f9ff,#f8fafc)
}
.upload-box.dragover{background:#e0f2fe;border-color:#0ea5e9}
.upload-box p{margin:8px 0 0;color:#64748b;font-size:12px}

/* ===== BUTTONS ===== */
.upload-btn,
.action-btn,
.favicon-btn,
.ico-btn,
.copy-btn,
.ico-size-btn{
  border:0;border-radius:10px;
  padding:9px 16px;font-weight:700;font-size:13px;
  cursor:pointer;
  transition:all .2s ease;
  position:relative;overflow:hidden
}
.upload-btn::before,
.action-btn::before,
.favicon-btn::before,
.ico-size-btn::before,
.copy-btn::before{
  content:"";position:absolute;top:0;left:0;right:0;height:50%;
  background:linear-gradient(180deg,rgba(255,255,255,.2) 0%,rgba(255,255,255,0) 100%);
  pointer-events:none;border-radius:10px 10px 0 0
}

.upload-btn,
.action-btn,
.favicon-btn{
  background:linear-gradient(180deg,#0ea5e9,#0284c7);
  color:#fff;
  border:1px solid rgba(14,165,233,.4);
  box-shadow:0 0 12px rgba(14,165,233,.15),0 3px 10px rgba(14,165,233,.2),inset 0 1px 0 rgba(255,255,255,.12)
}
.upload-btn:hover,
.action-btn:hover,
.favicon-btn:hover{
  background:linear-gradient(180deg,#38bdf8,#0ea5e9);
  box-shadow:0 0 20px rgba(14,165,233,.3),0 5px 14px rgba(14,165,233,.25);
  transform:translateY(-1px)
}
.upload-btn:active,
.action-btn:active,
.favicon-btn:active{transform:translateY(0)}

/* Red button (Choose Image) */
.btn-red{background:linear-gradient(180deg,#ef4444,#dc2626)!important;border:1px solid rgba(239,68,68,.4)!important;box-shadow:0 0 12px rgba(239,68,68,.15),0 3px 10px rgba(239,68,68,.2),inset 0 1px 0 rgba(255,255,255,.12)!important}
.btn-red:hover{background:linear-gradient(180deg,#f87171,#ef4444)!important;box-shadow:0 0 20px rgba(239,68,68,.3),0 5px 14px rgba(239,68,68,.25)!important}

/* Magenta button (Download) */
.btn-magenta{background:linear-gradient(180deg,#d946ef,#a21caf)!important;border:1px solid rgba(217,70,239,.4)!important;box-shadow:0 0 12px rgba(217,70,239,.15),0 3px 10px rgba(217,70,239,.2),inset 0 1px 0 rgba(255,255,255,.12)!important}
.btn-magenta:hover{background:linear-gradient(180deg,#e879f9,#d946ef)!important;box-shadow:0 0 20px rgba(217,70,239,.3),0 5px 14px rgba(217,70,239,.25)!important}

/* Active/selected button state (Convert buttons) */
.action-btn.btn-active{background:linear-gradient(180deg,#22c55e,#16a34a)!important;border:1px solid rgba(34,197,94,.4)!important;box-shadow:0 0 12px rgba(34,197,94,.15),0 3px 10px rgba(34,197,94,.2),inset 0 1px 0 rgba(255,255,255,.12)!important}
.action-btn.btn-active:hover{background:linear-gradient(180deg,#4ade80,#22c55e)!important}

.ico-size-btn{
  background:linear-gradient(180deg,#1e293b,#0f172a);
  color:#fff;
  border:1px solid rgba(30,41,59,.5);
  box-shadow:0 2px 8px rgba(0,0,0,.1)
}
.ico-size-btn:hover{
  background:linear-gradient(180deg,#334155,#1e293b);
  transform:translateY(-1px)
}

.ico-grid .ico-btn{
  background:linear-gradient(180deg,#0ea5e9,#0284c7);
  border:1px solid rgba(14,165,233,.4)
}
.ico-grid .ico-btn:hover{
  background:linear-gradient(180deg,#38bdf8,#0ea5e9)
}

.copy-btn{
  background:linear-gradient(180deg,#fff,#f0f9ff);
  color:#0284c7;
  border:1px solid #7dd3fc;
  box-shadow:0 1px 4px rgba(0,0,0,.06)
}
.copy-btn:hover{
  background:linear-gradient(180deg,#f0f9ff,#e0f2fe);
  border-color:#38bdf8;color:#0ea5e9;
  transform:translateY(-1px)
}

/* ===== FILE INFO ===== */
.file-info{
  margin-top:10px;
  background:linear-gradient(180deg,#f0f9ff,#e0f2fe);
  color:#0284c7;
  border:1px solid #7dd3fc;
  padding:8px 12px;border-radius:10px;
  font-weight:700;font-size:13px
}
.hidden{display:none !important}

/* ===== PREVIEW GRID ===== */
.preview-grid{
  display:grid;grid-template-columns:1fr;
  gap:12px;margin-top:12px
}
.preview-card{
  border:1px solid #e2e8f0;border-radius:14px;
  padding:14px;background:#fff
}
.preview-card h3{margin:0 0 8px;font-size:14px;font-weight:800;color:#1e293b}
.preview-card img{max-width:100%;max-height:320px;display:block;margin:0 auto;border-radius:10px;background:#f1f5f9}
.details{display:grid;gap:8px;color:#334155;font-size:13px}

/* ===== TOOLS GRID - FULL WIDTH ===== */
.tools-grid{
  display:grid;grid-template-columns:1fr;
  gap:12px
}
.tool-panel{padding:14px}
.tool-panel.full{grid-column:1 / -1}
.tool-panel h2{margin:0 0 6px;font-size:16px;font-weight:800;color:#1e293b;letter-spacing:-.3px}
.tool-panel p{margin:0 0 12px;color:#64748b;font-size:12px;line-height:1.4}

/* ===== FORM ===== */
.button-row{display:flex;flex-wrap:wrap;gap:8px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:10px}
.form-row label{font-weight:700;font-size:12px;color:#475569;letter-spacing:.2px}
.form-row input{
  width:100%;margin-top:5px;
  padding:8px 10px;border-radius:8px;
  border:1px solid #d4d9e3;
  font-size:13px;background:#fff;color:#1e293b;
  transition:border-color .15s,box-shadow .15s
}
.form-row input:focus{outline:none;border-color:#0ea5e9;box-shadow:0 0 0 3px rgba(14,165,233,.1)}
.check-line{
  display:flex;align-items:center;gap:8px;
  margin:6px 0 12px;color:#475569;
  font-weight:700;font-size:12px
}
.check-line input[type="checkbox"]{accent-color:#0ea5e9}

/* ===== FAVICON GRID ===== */
.favicon-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.ico-btn{grid-column:1 / -1}

/* ===== HTML CODE BOX ===== */
.html-code-box{margin-top:14px}
.html-code-box h3{margin:0 0 8px;font-size:14px;font-weight:800;color:#1e293b}
.html-code-box textarea{
  width:100%;min-height:100px;resize:vertical;
  border:1px solid #d4d9e3;border-radius:10px;
  padding:10px;font-family:'Cascadia Code',Consolas,monospace;
  font-size:12px;background:#fafbff;color:#1e293b
}

/* ===== SUB TITLE & NOTES ===== */
.sub-title{margin:14px 0 6px;font-size:15px;font-weight:800;color:#1e293b}
.small-note{margin:0 0 10px !important;font-size:12px;color:#64748b}

/* ===== SEO CONTENT ===== */
.seo-content{margin-top:14px;padding:16px}
.seo-content h2{margin:0 0 8px;font-size:16px;font-weight:800;color:#1e293b}
.seo-content p{color:#64748b;font-size:13px;line-height:1.6}

/* ===== FOOTER ===== */
.site-footer{
  text-align:center;padding:16px;
  color:#64748b;font-size:12px;
  border-top:1px solid #e2e8f0;background:#fff;
  margin-top:20px
}

/* ===== TOPBAR (DifferencePilot brand header) ===== */
.topbar{background:linear-gradient(135deg,#172554,#334155);color:white;border-radius:18px;padding:18px;box-shadow:0 14px 32px rgba(15,23,42,.22)}
.topbar h1{margin:0;font-size:27px}
.topbar p{margin:6px 0 0;color:#dbeafe}
.brand-topbar{position:relative;overflow:hidden;display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:144px;padding:18px;background:radial-gradient(circle at 16% 12%,rgba(34,211,238,.28),transparent 26%),linear-gradient(135deg,#8999eb 0%,#a9a9a5 48%,#0284c7 100%)}
.brand-topbar::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,.18),rgba(255,255,255,0) 46%);pointer-events:none}
.brand-topbar::after{content:"";position:absolute;right:-110px;top:-110px;width:280px;height:280px;border-radius:999px;background:rgba(255,255,255,.10);pointer-events:none}
.brand-logo{position:relative;z-index:1;flex:0 0 520px;width:520px;max-width:52%;height:108px;min-height:0!important;padding:0;overflow:hidden;display:flex;align-items:center;justify-content:center}
.brand-logo img{width:280px;max-width:none;height:auto;max-height:none;display:block;object-fit:contain;transform:scale(1.85);transform-origin:center center}
.brand-copy{position:relative;z-index:1;flex:1 1 auto;max-width:620px;text-align:right}
.brand-copy h1{margin:0;color:#fff;font-size:30px;line-height:1.1;letter-spacing:-.5px}
.brand-copy p{margin:8px 0 0;color:#dff7ff;font-size:14px;line-height:1.45}
.site-nav{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}
.site-nav a{background:#fff;border:1px solid #dbe3ef;color:#172554;text-decoration:none;padding:9px 12px;border-radius:999px;font-weight:900;font-size:13px}
.site-nav a:hover{background:#dbeafe}

/* ===== RESPONSIVE ===== */
@media(max-width:760px){
  .hero h1{font-size:16px}
  .preview-grid,.tools-grid,.form-row,.favicon-grid{grid-template-columns:1fr}
  .brand{flex-direction:column;align-items:flex-start;gap:2px}
}
@media(max-width:900px){.brand-topbar{align-items:flex-start;flex-direction:column;min-height:auto}.brand-logo{flex:none;width:100%;max-width:620px;height:96px;justify-content:flex-start}.brand-logo img{width:280px;transform:scale(1.55);transform-origin:left center}.brand-copy{text-align:left;max-width:100%}}
@media(max-width:520px){.brand-logo{width:100%;max-width:100%;height:58px}.brand-logo img{width:160px;transform:scale(1.42)}.brand-copy h1{font-size:24px}}