/* ===== Perú Blockchain · Attendee Card Generator =====
   Design system aligned with the "conferencia-kriss" project tokens. */
:root{
  /* palette (from tailwind.config.ts of conferencia-kriss) */
  --ink:#000714;
  --ink-900:#000917;
  --ink-800:#0A1120;
  --ink-700:#0E1626;
  --surface:#0F1626;
  --surface-light:#141C2E;
  --surface-border:#1E2A40;
  --brand:#1F5FFF;
  --brand-50:#E8F0FF;
  --brand-100:#C7DBFF;
  --brand-400:#4F8BFF;
  --brand-500:#2E78FF;
  --brand-700:#1A4FE0;
  --brand-800:#1546C7;
  --muted:#8A93A6;
  --white:#ffffff;
  --brand-gradient:linear-gradient(90deg,#1A4FE0 0%,#2E78FF 100%);
  --shadow-brand:0 10px 30px -8px rgba(31,95,255,.5);
  --radius:1rem;        /* rounded-2xl */
  --radius-sm:.75rem;   /* rounded-xl */
  color-scheme:dark;
}
*{box-sizing:border-box}
*{-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  color:var(--white);
  background:
    radial-gradient(95% 60% at 100% -10%, rgba(31,95,255,.07), transparent 55%),
    #060a14;
  min-height:100vh;min-height:100dvh;
  overflow-x:clip;line-height:1.5;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
*::-webkit-scrollbar{width:8px;height:8px}
*::-webkit-scrollbar-thumb{background:var(--surface-border);border-radius:8px}

/* ===== header (fixed while scrolling) ===== */
.site-header{
  position:sticky;top:0;z-index:30;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px clamp(16px,4vw,40px);
  border-bottom:1px solid var(--surface-border);
  background:rgba(6,10,20,.88);backdrop-filter:blur(12px);
}
.brand{display:flex;align-items:center}
.brand-logo{height:clamp(32px,4.5vw,42px);width:auto;display:block}

/* ===== layout ===== */
.layout{
  position:relative;z-index:1;
  max-width:1320px;margin:0 auto;padding:clamp(16px,3vw,32px);
  display:grid;grid-template-columns:minmax(0,400px) minmax(0,1fr);
  gap:clamp(16px,2.4vw,28px);align-items:start;
}
.panel{
  background:rgba(15,22,38,.5);              /* surface/50 */
  border:1px solid var(--surface-border);
  border-radius:var(--radius);
  box-shadow:0 8px 24px -16px rgba(0,0,0,.5);
}

/* ===== controls ===== */
.controls{padding:clamp(18px,2.5vw,26px);display:flex;flex-direction:column;gap:22px}
.panel-head h1{font-size:clamp(22px,3vw,28px);margin:0 0 6px;font-weight:800;letter-spacing:-.01em}
.panel-head h1 .hl{
  background:var(--brand-gradient);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:var(--brand-400);
}
.panel-head p{margin:0;color:var(--muted);font-size:14px}

.field-group{display:flex;flex-direction:column;gap:12px}
.group-title{
  display:flex;align-items:center;gap:10px;font-weight:700;font-size:14px;
  letter-spacing:.4px;color:var(--white);text-transform:uppercase;
}
.group-title em{color:var(--muted);font-style:normal;font-weight:500;text-transform:none;letter-spacing:0;font-size:12px}
.group-title em.req{color:var(--brand-400)}
.group-title .num{
  display:grid;place-items:center;width:22px;height:22px;border-radius:7px;font-size:12px;
  background:rgba(31,95,255,.14);color:var(--brand-400);font-weight:700;flex:none;
}

/* dropzones */
.dropzone{
  display:flex;align-items:center;gap:14px;cursor:pointer;
  padding:18px;border:1.5px dashed var(--surface-border);border-radius:var(--radius);
  background:rgba(15,22,38,.5);transition:.18s ease;color:var(--muted);
}
.dropzone.small{padding:14px}
.dropzone:hover,.dropzone.drag{border-color:var(--brand);background:rgba(31,95,255,.08);color:var(--white)}
.dz-icon{width:34px;height:34px;color:var(--brand-400);flex:none}
.dz-text{display:flex;flex-direction:column}
.dz-text strong{font-size:15px;color:var(--white);font-weight:600}
.dz-text small{font-size:12px;color:var(--muted)}

/* photo tools */
.photo-tools{display:flex;flex-direction:column;gap:10px;padding:12px;border:1px solid var(--surface-border);border-radius:var(--radius-sm);background:rgba(10,17,32,.6)}
.photo-tools .hint{font-size:12.5px;color:var(--muted)}
.slider-row{display:flex;align-items:center;gap:12px}
.slider-ico{color:var(--muted);font-size:18px;width:14px;text-align:center;user-select:none}
input[type=range]{-webkit-appearance:none;appearance:none;flex:1;height:5px;border-radius:5px;background:var(--brand-gradient);outline:none}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:#fff;border:3px solid var(--brand);cursor:pointer;box-shadow:0 2px 8px rgba(0,0,0,.5)}
input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:#fff;border:3px solid var(--brand);cursor:pointer}
.ghost-btn{background:transparent;border:1px solid rgba(31,95,255,.5);color:var(--brand-400);padding:6px 12px;border-radius:var(--radius-sm);cursor:pointer;font-size:12px;font-weight:600;transition:.15s}
.ghost-btn:hover{color:#fff;background:rgba(31,95,255,.1)}

/* fields */
.fld{display:flex;flex-direction:column;gap:6px}
.fld span{font-size:12.5px;color:var(--muted);font-weight:500}
.fld input{
  width:100%;padding:14px 16px;border-radius:var(--radius);
  border:1px solid var(--surface-border);background:rgba(15,22,38,.6);
  color:var(--white);font-size:15px;font-family:inherit;transition:.15s;
}
.fld input::placeholder{color:var(--muted)}
.fld input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 1px var(--brand)}

/* logo chip */
.file-chip{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:var(--radius-sm);border:1px solid var(--surface-border);background:rgba(10,17,32,.6)}
.file-chip img{width:38px;height:38px;object-fit:contain;border-radius:6px;flex:none}
.file-chip span{flex:1;font-size:13px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.chip-action{display:grid;place-items:center;flex:none;background:transparent;border:1px solid var(--surface-border);
  color:var(--muted);cursor:pointer;padding:8px;border-radius:9px;transition:.15s}
.chip-action svg{width:16px;height:16px;display:block}
.chip-action:hover{color:var(--brand-400);border-color:var(--brand);background:rgba(31,95,255,.1)}

/* CTA — btn-primary */
.cta{
  display:flex;align-items:center;justify-content:center;gap:10px;cursor:pointer;width:100%;
  margin-top:4px;padding:16px;border:none;border-radius:var(--radius);
  font-weight:600;font-size:17px;color:#fff;
  background:var(--brand-gradient);box-shadow:var(--shadow-brand);transition:.15s;
}
.cta:hover{filter:brightness(1.06)}
.cta:active{transform:scale(.98)}
.cta svg{width:20px;height:20px}
.cta:disabled{opacity:.5;cursor:wait}

/* ===== preview (pinned below header so it stays visible while editing) ===== */
.preview{padding:clamp(16px,2vw,24px);position:sticky;top:calc(var(--header-h, 80px) + 14px);display:flex;flex-direction:column;gap:14px}
.preview-stage{display:flex;align-items:center;justify-content:center}
.canvas-wrap{position:relative;width:100%;aspect-ratio:2160/1132;border-radius:var(--radius-sm);overflow:hidden;
  box-shadow:0 30px 70px -25px rgba(0,0,0,.85);border:1px solid var(--surface-border)}
#card{display:block;width:100%;height:100%;touch-action:none;cursor:grab}
#card.grabbing{cursor:grabbing}
/* "you can move the photo" signal, centered over the photo region */
.drag-hint{
  position:absolute;left:74.4%;top:34%;transform:translateX(-50%);
  display:flex;align-items:center;gap:7px;white-space:nowrap;pointer-events:none;
  padding:7px 13px;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.2px;color:#fff;
  background:rgba(5,9,20,.66);border:1px solid rgba(255,255,255,.2);backdrop-filter:blur(4px);
  opacity:0;transition:opacity .3s ease;
}
.drag-hint.show{opacity:1;animation:hint-bob 1.7s ease-in-out infinite}
.drag-hint svg{width:15px;height:15px;color:var(--brand-400)}
@keyframes hint-bob{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(-3px)}}
@media (prefers-reduced-motion:reduce){.drag-hint.show{animation:none}}
.loading{position:absolute;inset:0;display:grid;place-items:center;background:var(--surface);color:var(--muted);font-size:14px;letter-spacing:1px}
.preview-meta{display:flex;align-items:center;gap:8px;justify-content:center;font-size:12px;color:var(--muted);letter-spacing:.5px}
.live-dot{width:8px;height:8px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 0 rgba(31,95,255,.6);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(31,95,255,.55)}70%{box-shadow:0 0 0 8px rgba(31,95,255,0)}100%{box-shadow:0 0 0 0 rgba(31,95,255,0)}}

/* ===== footer ===== */
.site-footer{position:relative;z-index:1;text-align:center;padding:24px 16px 32px;color:var(--muted);font-size:12px}

/* toast */
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);z-index:50;
  background:var(--surface-light);border:1px solid rgba(31,95,255,.5);color:#fff;
  padding:12px 18px;border-radius:var(--radius-sm);font-size:13.5px;box-shadow:var(--shadow-brand);opacity:0;transition:.25s;pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ===== responsive ===== */
@media (max-width:900px){
  .layout{grid-template-columns:1fr;gap:18px;padding-top:14px}
  .preview{position:sticky;top:var(--header-h, 64px);order:-1;padding:12px;border-radius:var(--radius);
    background:rgba(7,11,22,.94);backdrop-filter:blur(16px);z-index:20;box-shadow:0 14px 30px -18px rgba(0,0,0,.9)}
  .canvas-wrap{max-width:520px;margin:0 auto;box-shadow:0 16px 40px -20px rgba(0,0,0,.8)}
  .preview-meta{display:none}
}
@media (max-width:560px){
  .site-header{padding:14px 16px}
  .controls{padding:16px;gap:18px}
  .dropzone{padding:14px}
  .dz-icon{width:28px;height:28px}
  .cta{padding:15px;font-size:16px}
  .preview{padding:10px}
}
@media (prefers-reduced-motion:reduce){
  .live-dot{animation:none}
  .cta{transition:none}
}