:root{
  --brand:#0b6b3a;
  --brand-2:#0f8a4a;
  --bg:#f4f7f5;
  --ink:#15221c;
  --muted:#5a6b62;
  --err:#b00020;
  --radius:14px;
  --shadow:0 8px 24px rgba(11,107,58,.10);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}

.wrap{max-width:520px;margin:0 auto;padding:28px 18px 60px}

.hero{text-align:center;margin-bottom:22px}
.hero .brand{
  margin:0 0 8px;
  font-size:.9rem;
  font-weight:600;
  letter-spacing:.02em;
  color:var(--muted);
}
.hero h1{margin:0 0 6px;font-size:clamp(1.5rem,4.5vw,2rem);color:var(--brand)}
.hero .sub{margin:0;color:var(--muted);font-size:.98rem}

.card{
  background:#fff;
  border-radius:var(--radius);
  padding:22px;
  box-shadow:var(--shadow);
}

.field{display:flex;flex-direction:column;gap:6px;margin-bottom:18px}
.field label{font-weight:600;font-size:.95rem}
.field input[type=text]{
  padding:12px 14px;border:1.5px solid #d5ded9;border-radius:10px;
  font:inherit;font-size:1rem;background:#fbfdfc;color:var(--ink);
  transition:border-color .15s,box-shadow .15s;
}
.field input[type=text]:focus{
  outline:none;border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(11,107,58,.14);
}
.field input[type=file]{
  font:inherit;padding:10px;border:1.5px dashed #cbd7d0;border-radius:10px;
  background:#fbfdfc;cursor:pointer;
}
.hint{color:var(--muted);font-size:.82rem}

/* Sample/reference photo shown under the upload instructions. */
.photo-example{
  display:block;
  width:100%;
  max-width:140px;
  height:auto;
  margin:10px auto 0;
  border:1px solid #d5ded9;
  border-radius:10px;
  background:#fbfdfc;
}

.btn{
  width:100%;border:0;border-radius:10px;cursor:pointer;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;font-weight:700;font-size:1rem;padding:14px 18px;
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  transition:transform .06s,filter .15s;
  text-decoration:none;
}
.btn:hover{filter:brightness(1.06)}
.btn:active{transform:translateY(1px)}
.btn[disabled]{opacity:.75;cursor:not-allowed}

.btn-spinner{
  width:16px;height:16px;border-radius:50%;
  border:2.5px solid rgba(255,255,255,.45);border-top-color:#fff;
  animation:spin .8s linear infinite;display:none;
}
.btn.loading .btn-spinner{display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}

.error{
  margin:14px 0 0;padding:10px 12px;border-radius:8px;
  background:#ffecef;color:var(--err);font-size:.9rem;font-weight:500;
}

.preview{margin-top:26px;text-align:center}
.preview h2{margin:0 0 14px;font-size:1.15rem;color:var(--brand)}
.preview img{
  width:100%;max-width:100%;height:auto;border-radius:var(--radius);
  box-shadow:var(--shadow);display:block;margin:0 auto 16px;
}
.btn-download{display:inline-flex;width:auto;padding:12px 22px}

.foot{margin-top:30px;text-align:center;color:var(--muted);font-size:.82rem}

@media (max-width:420px){
  .wrap{padding:20px 14px 50px}
  .card{padding:18px}
}

/* ==========================================================================
   Sticky header navigation
   ========================================================================== */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 2px 10px rgba(11,107,58,.18);
}
.site-header__inner{
  position:relative;
  max-width:1100px;
  margin:0 auto;
  padding:0 18px;
  height:56px;
  display:flex;
  align-items:center;
  justify-content:center;
}

/* Logo pinned to the left of the header bar. Absolutely positioned so it
   does not push the centered navigation and does not affect header height. */
.site-logo{
  position:absolute;
  left:14px;
  top:50%;
  transform:translateY(-50%);
  height:34px;
  width:auto;
  max-width:120px;
  display:block;
  object-fit:contain;
  filter:drop-shadow(0 1px 2px rgba(0,0,0,.15));
}

.site-nav{
  display:flex;
  align-items:center;
  gap:6px;
}
.site-nav__link{
  color:#fff;
  text-decoration:none;
  font-weight:600;
  font-size:.95rem;
  padding:9px 16px;
  border-radius:8px;
  transition:background-color .15s;
}
.site-nav__link:hover,
.site-nav__link:focus-visible{
  background:rgba(255,255,255,.14);
  outline:none;
}

/* Hamburger toggle — hidden on desktop, shown on mobile */
.site-nav__toggle{
  display:none;
  position:absolute;
  right:14px;
  top:50%;
  transform:translateY(-50%);
  width:42px;
  height:42px;
  border:0;
  background:transparent;
  border-radius:8px;
  cursor:pointer;
  padding:0;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
}
.site-nav__toggle:focus-visible{
  outline:2px solid rgba(255,255,255,.75);
  outline-offset:2px;
}
.site-nav__toggle span{
  display:block;
  width:22px;
  height:2.5px;
  background:#fff;
  border-radius:2px;
  transition:transform .2s ease, opacity .2s ease;
}
.site-header.open .site-nav__toggle span:nth-child(1){
  transform:translateY(7.5px) rotate(45deg);
}
.site-header.open .site-nav__toggle span:nth-child(2){
  opacity:0;
}
.site-header.open .site-nav__toggle span:nth-child(3){
  transform:translateY(-7.5px) rotate(-45deg);
}

@media (max-width:640px){
  .site-header__inner{height:52px}

  /* Logo shrinks slightly on small screens to keep the bar balanced. */
  .site-logo{
    left:12px;
    height:28px;
    max-width:80px;
  }

  .site-nav{
    display:none;
    position:absolute;
    top:calc(100% + 8px);
    left:12px;
    right:12px;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    background:#fff;
    padding:8px;
    border-radius:12px;
    box-shadow:0 12px 28px rgba(0,0,0,.18);
  }
  .site-nav.is-open{
    display:flex;
  }
  .site-nav__link{
    color:var(--ink);
    padding:12px 14px;
    font-size:1rem;
    text-align:left;
    border-radius:8px;
  }
  .site-nav__link:hover,
  .site-nav__link:focus-visible{
    background:#f0f5f2;
  }

  .site-nav__toggle{display:flex}
}