:root {
  --teal: #0097b2;
  --teal-dark: #007d94;
  --ink: #111111;
  --green: #7ed957;
  --bg: #f6f8f9;
  --card: #ffffff;
  --border: #e2e8ea;
  --muted: #6b7780;
  --warn-bg: #fff3b0;
  --warn-ink: #6b5400;
  --err-bg: #fdecec;
  --err-ink: #a3261f;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  background: var(--ink);
  color: #fff;
  padding: 14px 28px;
  display: flex;
  align-items: baseline;
  gap: 16px;
}
.brand { display: flex; align-items: center; gap: 8px; }
.brand-mark { color: var(--green); font-size: 14px; }
.brand-name { font-weight: 700; letter-spacing: .3px; }
.brand-sub { color: #b9c2c6; font-size: 14px; }

.container {
  flex: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px;
}

.vista { text-align: center; }

h1 { font-size: 28px; margin-bottom: 10px; }
h2 { font-size: 22px; margin-bottom: 16px; }
.sub { color: var(--muted); margin-bottom: 28px; line-height: 1.5; }
.nota { color: var(--muted); font-size: 13px; margin-top: 14px; }

.dropzone {
  border: 2px dashed var(--teal);
  border-radius: 14px;
  background: var(--card);
  padding: 54px 24px;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.dropzone:hover { background: #f0fbfd; }
.dropzone.dragover { background: #e3f7fb; border-color: var(--teal-dark); }
.dropzone-icon { font-size: 40px; color: var(--teal); }
.dropzone-title { font-weight: 600; margin-top: 12px; }
.dropzone-hint { color: var(--muted); font-size: 14px; margin-top: 4px; }

.btn {
  display: inline-block;
  border: none;
  border-radius: 9px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
.btn-primary { background: var(--teal); color: #fff; }
.btn-primary:hover { background: var(--teal-dark); }
.btn-ghost { background: transparent; color: var(--muted); }
.btn-ghost:hover { color: var(--ink); }
.azioni { margin-top: 26px; display: flex; gap: 12px; justify-content: center; }

.spinner {
  width: 46px; height: 46px;
  border: 4px solid var(--border);
  border-top-color: var(--teal);
  border-radius: 50%;
  margin: 0 auto 22px;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.progress-wrap {
  background: var(--border);
  border-radius: 6px;
  height: 10px;
  margin: 22px auto 8px;
  max-width: 380px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  width: 0;
  background: var(--teal);
  transition: width .3s ease;
}
.progress-bar.indeterminate {
  width: 100% !important;
  background: linear-gradient(90deg, var(--border) 0%, var(--teal) 50%, var(--border) 100%);
  background-size: 220% 100%;
  animation: shimmer 1.3s linear infinite;
  transition: none;
}
@keyframes shimmer {
  0% { background-position: 220% 0; }
  100% { background-position: -220% 0; }
}

.esito-ok, .esito-ko {
  width: 58px; height: 58px;
  border-radius: 50%;
  margin: 0 auto 18px;
  font-size: 30px; line-height: 58px;
  color: #fff;
}
.esito-ok { background: var(--green); }
.esito-ko { background: var(--err-ink); }

.riepilogo {
  display: flex;
  gap: 14px;
  justify-content: center;
  margin: 8px 0 12px;
  flex-wrap: wrap;
}
.riep-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 22px;
  min-width: 150px;
}
.riep-val { display: block; font-size: 26px; font-weight: 700; color: var(--teal); }
.riep-lab { display: block; font-size: 13px; color: var(--muted); margin-top: 4px; }

.avviso {
  background: var(--warn-bg);
  color: var(--warn-ink);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13px;
  margin-top: 12px;
}
.errore-inline { color: var(--err-ink); font-size: 14px; margin-top: 14px; }
.errore-box {
  background: var(--err-bg);
  color: var(--err-ink);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 22px;
  line-height: 1.5;
}

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  padding: 18px;
}