/* ─── Reset & Variables ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:         #0f172a;
  --surface:    #1e293b;
  --surface2:   #263347;
  --border:     #334155;
  --text:       #f1f5f9;
  --text-muted: #94a3b8;
  --accent:     #2563eb;
  --accent-h:   #1d4ed8;
  --green:      #22c55e;
  --amber:      #f59e0b;
  --purple:     #8b5cf6;
  --red:        #ef4444;
  --radius:     12px;
  --shadow:     0 4px 24px rgba(0,0,0,.4);
}

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

/* ─── Header ─────────────────────────────────────────────────── */
header {
  background: linear-gradient(135deg, #0f2044 0%, #1e3a6e 100%);
  padding: 28px 24px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
header h1 { font-size: clamp(1.4rem, 4vw, 2rem); font-weight: 800; }
header p  { color: var(--text-muted); margin-top: 6px; font-size: .95rem; }
.pill {
  display: inline-block;
  background: rgba(34,197,94,.15);
  color: var(--green);
  border: 1px solid rgba(34,197,94,.3);
  border-radius: 20px;
  padding: 3px 14px;
  font-size: .78rem;
  font-weight: 600;
  margin-top: 10px;
  letter-spacing: .5px;
}

/* ─── Layout ─────────────────────────────────────────────────── */
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 20px 60px;
  display: grid;
  gap: 32px;
}

section h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}
section h2 span { font-size: 1.2em; }

/* ─── Printer Grid ───────────────────────────────────────────── */
.printer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
}

.printer-card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 14px;
  cursor: pointer;
  transition: all .2s ease;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.printer-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--card-accent, var(--accent));
}
.printer-card:hover:not(.soon):not(.selected) {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.printer-card.selected {
  border-color: var(--accent);
  background: rgba(37,99,235,.12);
  box-shadow: 0 0 0 3px rgba(37,99,235,.25);
}
.printer-card.soon {
  opacity: .55;
  cursor: not-allowed;
}
.printer-card .icon { font-size: 2rem; margin-bottom: 8px; }
.printer-card .name { font-size: .88rem; font-weight: 700; line-height: 1.3; }
.printer-card .model { font-size: .75rem; color: var(--text-muted); margin-top: 4px; }
.printer-card .badge {
  display: inline-block;
  margin-top: 10px;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .4px;
}
.badge-available { background: rgba(34,197,94,.15); color: var(--green); }
.badge-soon      { background: rgba(245,158,11,.15); color: var(--amber); }

/* ─── Form ───────────────────────────────────────────────────── */
.form-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
@media (max-width: 600px) { .form-grid { grid-template-columns: 1fr; } }

.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }

label { font-size: .83rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .5px; }

input, select {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 10px 14px;
  font-size: .95rem;
  transition: border-color .2s;
  outline: none;
  width: 100%;
}
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(37,99,235,.2); }
input::placeholder { color: var(--text-muted); }

select option { background: var(--surface); }

/* ─── Printer selector inside form ──────────────────────────── */
#selected-printer-info {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: .9rem;
  color: var(--text-muted);
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 8px;
}
#selected-printer-info.chosen { color: var(--text); border-color: var(--accent); }

/* ─── Submit button ──────────────────────────────────────────── */
.btn-submit {
  grid-column: 1 / -1;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 14px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background .2s, transform .1s;
  letter-spacing: .3px;
  margin-top: 6px;
}
.btn-submit:hover:not(:disabled) { background: var(--accent-h); transform: translateY(-1px); }
.btn-submit:disabled { opacity: .5; cursor: not-allowed; }

/* ─── Alert messages ─────────────────────────────────────────── */
.alert {
  border-radius: 8px;
  padding: 14px 18px;
  font-size: .92rem;
  display: none;
  align-items: flex-start;
  gap: 10px;
  margin-top: 16px;
  grid-column: 1 / -1;
}
.alert.show { display: flex; }
.alert-success { background: rgba(34,197,94,.12); border: 1px solid rgba(34,197,94,.3); color: #86efac; }
.alert-error   { background: rgba(239,68,68,.12);  border: 1px solid rgba(239,68,68,.3);  color: #fca5a5; }
.alert-icon { font-size: 1.2rem; flex-shrink: 0; }

/* ─── Confirmation card ──────────────────────────────────────── */
#confirmation-box {
  display: none;
  background: var(--surface);
  border: 1px solid var(--green);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  box-shadow: 0 0 30px rgba(34,197,94,.1);
}
#confirmation-box.show { display: block; }
.code-display {
  background: linear-gradient(135deg, #0f2044, #1e3a6e);
  border-radius: 10px;
  padding: 20px;
  margin: 20px 0;
}
.code-display .label { font-size: .78rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.code-display .code  { font-size: 2.2rem; font-weight: 900; letter-spacing: 6px; color: #60a5fa; margin-top: 4px; }
.detail-row { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--border); font-size: .9rem; }
.detail-row:last-child { border: none; }
.detail-label { color: var(--text-muted); }

/* ─── Cancel section ─────────────────────────────────────────── */
.cancel-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 12px;
  align-items: end;
}
@media (max-width: 600px) { .cancel-row { grid-template-columns: 1fr; } }
.btn-danger {
  background: transparent;
  border: 1px solid var(--red);
  color: var(--red);
  border-radius: 8px;
  padding: 10px 18px;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s;
  white-space: nowrap;
}
.btn-danger:hover { background: var(--red); color: white; }

/* ─── Loader ─────────────────────────────────────────────────── */
.spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,.3);
  border-top-color: white;
  border-radius: 50%;
  display: inline-block;
  animation: spin .7s linear infinite;
  vertical-align: middle;
  margin-right: 8px;
}
@keyframes spin { to { transform: rotate(360deg); } }