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

:root {
  --bg: #ffffff;
  --bg2: #f7f8fc;
  --surface: #ffffff;
  --surface2: #f1f4f9;
  --border: #e4e8f0;
  --border2: #d0d7e8;

  --grad: linear-gradient(135deg, #1a56f0 0%, #4f46e5 100%);
  --blue: #1a56f0;
  --indigo: #4f46e5;
  --blue-light: #eff3fe;
  --blue-mid: #c7d5fd;

  --text: #0f172a;
  --text2: #334155;
  --muted: #64748b;
  --muted2: #94a3b8;

  --green: #059669;
  --green-light: #ecfdf5;
  --green-mid: #a7f3d0;
  --red: #dc2626;
  --red-light: #fef2f2;
  --red-mid: #fecaca;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg2);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--blue); }

/* ── NAV ─────────────────────────────────────── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-logo {
  text-decoration: none;
  line-height: 1.2;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.nav-logo-main {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.4px;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav-logo-sub {
  font-family: 'Kalam', cursive;
  font-size: 13px;
  color: var(--muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
}
.nav-links a { color: var(--muted); text-decoration: none; font-weight: 600; }
.nav-links a:hover { color: var(--blue); }

/* ── LAYOUT ──────────────────────────────────── */
main {
  flex: 1;
  width: 100%;
  max-width: 820px;
  margin: 0 auto;
  padding: 48px 24px;
}
main.narrow { max-width: 480px; }
main.wide { max-width: 1000px; }

h1 {
  font-size: clamp(28px, 5vw, 38px);
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--text);
  margin-bottom: 8px;
}
h2 { font-size: 20px; font-weight: 700; color: var(--text); margin: 32px 0 14px; }
h3 { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 6px; }

.lede { color: var(--muted); font-size: 15px; margin-bottom: 28px; line-height: 1.65; }

.copyright-note {
  font-size: 12.5px;
  color: var(--muted2);
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  margin-bottom: 28px;
}

/* ── CARD ────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px 26px;
  box-shadow: 0 8px 30px rgba(15,23,42,0.05);
}
.card + .card { margin-top: 20px; }
@media (max-width: 480px) { .card { padding: 20px 18px; } }

.card-link {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 26px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 8px 30px rgba(15,23,42,0.05);
}
.card-link:hover {
  border-color: var(--blue-mid);
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(26,86,240,0.12);
}
.card-link h3 { font-size: 17px; margin-bottom: 6px; }
.card-link p { color: var(--muted); font-size: 14px; margin: 0; }
.card-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 640px) { .card-grid { grid-template-columns: 1fr 1fr; } }

.card-icon {
  width: 42px;
  height: 42px;
  background: var(--blue-light);
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  margin-bottom: 14px;
}

/* ── BADGE ───────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--blue-light);
  border: 1px solid var(--blue-mid);
  color: var(--blue);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 100px;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}
.badge-muted { background: var(--surface2); border-color: var(--border2); color: var(--muted); }

/* ── BUTTONS ─────────────────────────────────── */
.btn-primary, .btn-secondary, .btn-danger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: 15px;
  padding: 13px 28px;
  border-radius: 100px;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: opacity 0.2s, transform 0.15s, box-shadow 0.2s, background 0.2s, color 0.2s;
}
.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 4px 18px rgba(26,86,240,0.28);
}
.btn-primary:hover:not(:disabled) { opacity: 0.92; transform: translateY(-1px); box-shadow: 0 8px 24px rgba(26,86,240,0.32); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary:active:not(:disabled) { transform: translateY(0); }

.btn-secondary {
  background: var(--bg);
  color: var(--text2);
  border: 1.5px solid var(--border2);
}
.btn-secondary:hover { border-color: var(--blue); color: var(--blue); }

.btn-danger {
  background: var(--red-light);
  color: var(--red);
  border: 1.5px solid var(--red-mid);
  font-size: 13px;
  padding: 8px 16px;
}
.btn-danger:hover { background: var(--red); color: #fff; border-color: var(--red); }

.btn-small { font-size: 13px; padding: 8px 18px; }
.btn-block { width: 100%; }

/* ── FORMS ───────────────────────────────────── */
.form-group { margin-bottom: 18px; }

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text2);
  margin-bottom: 6px;
}

input[type="text"],
input[type="password"],
input[type="file"],
select {
  width: 100%;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  padding: 11px 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  -webkit-appearance: none;
}
input::placeholder { color: var(--muted2); }
input:focus, select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(26,86,240,0.1);
}
input[type="file"] { padding: 9px 12px; cursor: pointer; }
select { cursor: pointer; }

.pin-input {
  text-align: center;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: 20px;
  padding: 16px 14px 16px 28px;
}

/* ── ALERTS ──────────────────────────────────── */
.alert {
  border-radius: 12px;
  padding: 13px 16px;
  font-size: 14px;
  margin-bottom: 20px;
  border: 1px solid;
}
.alert-success { background: var(--green-light); border-color: var(--green-mid); color: var(--green); }
.alert-error { background: var(--red-light); border-color: var(--red-mid); color: var(--red); }

/* ── TABLE ───────────────────────────────────── */
.table-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(15,23,42,0.05);
}
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th {
  text-align: left;
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  background: var(--bg2);
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
td { padding: 12px 16px; border-bottom: 1px solid var(--border); color: var(--text2); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg2); }

/* ── CONSOLE / LOG ───────────────────────────── */
.console {
  background: #0f172a;
  color: #cbd5e1;
  border-radius: 14px;
  padding: 18px 20px;
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 13px;
  line-height: 1.7;
  white-space: pre-wrap;
  min-height: 40px;
  margin-top: 20px;
}

/* ── DROPZONE (file upload) ─────────────────── */
.dropzone {
  border: 2px dashed var(--border2);
  border-radius: 14px;
  padding: 24px 20px;
  text-align: center;
  background: var(--bg2);
}
.dropzone-icon { font-size: 26px; margin-bottom: 6px; }

/* ── FOOTER ──────────────────────────────────── */
footer {
  text-align: center;
  padding: 28px 24px;
  border-top: 1px solid var(--border);
  color: var(--muted2);
  font-size: 12.5px;
}

.print-btn-row { margin: 20px 0; }

@media print {
  nav, footer, .no-print { display: none !important; }
  body { background: #fff; }
  main { max-width: 100%; padding: 0; }
}