/* ═══════════════════════════════════════════════════════════════
   imifactory.ch – IP-Subnetz-Rechner
   style.css  |  Version 2.0  |  2026
   EBENE 1: imifactory Rahmen (FROZEN)
   EBENE 2: Tool-spezifische Styles
═══════════════════════════════════════════════════════════════ */

/* ─── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

/* ─── Base ──────────────────────────────────────────────────── */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #f8fafc;
  margin: 0;
  color: #333;
  line-height: 1.6;
}

/* ─── Header (FROZEN) ───────────────────────────────────────── */
header {
  background: linear-gradient(90deg, #05263d 0%, #0b3c5d 100%);
  padding: 15px 25px;
  color: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,.3);
}

.sitename {
  font-size: 24px;
  font-weight: 700;
  text-decoration: none;
  color: #fff;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.sitename img {
  height: 32px;
  width: auto;
}
/* Bild ausblenden wenn es nicht geladen werden kann */
#sitelogo[src=""] { display: none; }

/* ─── Breadcrumb (FROZEN) ───────────────────────────────────── */
.breadcrumb {
  margin-top: 8px;
  font-size: 12px;
  color: #cbd5e1;
}
.breadcrumb a {
  color: #fff;
  text-decoration: none;
}
.breadcrumb a:hover { color: #00bfae; }

/* ─── Container (FROZEN) ────────────────────────────────────── */
.container {
  max-width: 1000px;
  margin: 30px auto;
  padding: 0 20px;
}

/* ─── Back-Link (FROZEN) ────────────────────────────────────── */
.back-link {
  display: inline-block;
  margin-bottom: 15px;
  text-decoration: none;
  color: #0b3c5d;
  font-size: 14px;
  font-weight: 700;
}
.back-link:hover { color: #00897b; }

/* ─── Introbox (FROZEN) ─────────────────────────────────────── */
.imi-intro {
  background: linear-gradient(90deg, #e7f3fd, #f4faff);
  border-left: 5px solid #0b3c5d;
  padding: 24px 28px;
  border-radius: 4px;
  margin-bottom: 22px;
}
.imi-intro h2 {
  margin: 0 0 10px;
  color: #0b3c5d;
  font-size: 20px;
}
.imi-intro p {
  font-size: 15px;
  color: #444;
  margin: 0;
}

/* ─── Content Box (FROZEN) ──────────────────────────────────── */
.content-box {
  background: #fff;
  border: 1px solid #d1dce6;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,.05);
  margin-bottom: 22px;
}
.box-header {
  background: #0b3c5d;
  color: #fff;
  padding: 12px 20px;
  font-size: 15px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.box-body { padding: 24px 28px; }
.box-text p { margin: 0 0 12px; font-size: 14px; }
.box-text p:last-child { margin-bottom: 0; }
.box-text ul { margin: 4px 0 12px; padding-left: 20px; font-size: 14px; }

/* ─── Forms (FROZEN) ────────────────────────────────────────── */
label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: #5a7080;
  margin-bottom: 4px;
  margin-top: 14px;
}
label:first-child { margin-top: 0; }

input[type="text"],
input[type="number"],
select {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid #d1dce6;
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: #333;
  transition: border-color .2s;
}
input:focus,
select:focus {
  outline: none;
  border-color: #0b3c5d;
  box-shadow: 0 0 0 3px rgba(11,60,93,.1);
}

/* ─── Buttons (FROZEN) ──────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  transition: all .2s;
  font-family: inherit;
  min-height: 44px; /* WCAG 2.5.5 touch target */
}
.btn-primary { background: #0b3c5d; color: #fff; }
.btn-primary:hover { background: #1565a0; }
.btn-accent  { background: #00bfae; color: #fff; }
.btn-accent:hover  { background: #00897b; }
.btn-outline { background: #fff; color: #0b3c5d; border: 2px solid #0b3c5d; }
.btn-outline:hover { background: #0b3c5d; color: #fff; }
.btn-danger  { background: #ef5350; color: #fff; border: none; }
.btn-danger:hover  { background: #c62828; }
.btn-sm      { padding: 6px 12px; min-height: 36px; font-size: 13px; }

.btn-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
}

/* ─── Grid (FROZEN) ─────────────────────────────────────────── */
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }

/* ─── Footer (FROZEN) ───────────────────────────────────────── */
footer {
  text-align: center;
  font-size: 13px;
  color: #64748b;
  margin-top: 40px;
  padding-bottom: 30px;
}
footer a { color: #0b3c5d; text-decoration: none; margin: 0 10px; }
footer a:hover { color: #00897b; }

/* ═══════════════════════════════════════════════════════════════
   EBENE 2: Tool-spezifische Styles
═══════════════════════════════════════════════════════════════ */

/* ─── Tabs ──────────────────────────────────────────────────── */
.tabs {
  display: flex;
  border-bottom: 2px solid #d1dce6;
  margin-bottom: 20px;
}
.tab {
  padding: 10px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  color: #5a7080;
  border: none;
  background: none;
  font-family: inherit;
  transition: all .2s;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  min-height: 44px; /* WCAG touch target */
}
.tab:hover  { color: #0b3c5d; }
.tab.active { color: #0b3c5d; border-bottom-color: #0b3c5d; }
.tab:focus-visible {
  outline: 2px solid #0b3c5d;
  outline-offset: 2px;
}

.tab-panel        { display: none; }
.tab-panel.active { display: block; }

.tab-desc {
  font-size: 14px;
  color: #5a7080;
  margin-top: 0;
}

/* ─── Ergebnis-Grid ─────────────────────────────────────────── */
.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid #d1dce6;
  border-radius: 8px;
  overflow: hidden;
  margin-top: 16px;
}
.result-row { display: contents; }
.result-row:nth-child(odd) .rk,
.result-row:nth-child(odd) .rv { background: #f7fafd; }
.rk {
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 700;
  color: #0b3c5d;
  border-bottom: 1px solid #e8ecf0;
}
.rv {
  padding: 10px 16px;
  font-size: 13px;
  font-family: monospace;
  color: #1e2d3d;
  border-bottom: 1px solid #e8ecf0;
  word-break: break-all;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.result-row:last-child .rk,
.result-row:last-child .rv { border-bottom: none; }

/* ─── Bit-Darstellung ───────────────────────────────────────── */
.bit-section {
  margin-top: 18px;
}
.bit-label {
  font-size: 13px;
  font-weight: 700;
  color: #0b3c5d;
  margin-bottom: 6px;
}
.bit-visual {
  font-family: monospace;
  font-size: 12px;
  letter-spacing: 1px;
  line-height: 2;
}
.bit-net  { color: #0b3c5d; font-weight: 700; }
.bit-host { color: #00897b; font-weight: 700; }

/* ─── Info-Box & Error ──────────────────────────────────────── */
.info-box {
  background: #fffbea;
  border-left: 4px solid #ffc107;
  padding: 12px 16px;
  border-radius: 4px;
  font-size: 13px;
  color: #555;
  margin-top: 12px;
}
.error-msg {
  color: #ef5350;
  font-size: 13px;
  margin-top: 8px;
  min-height: 20px; /* verhindert Layout-Sprung */
}

/* ─── Badges ────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 700;
  margin-left: 6px;
}
.badge-private { background: #c8e6c9; color: #1b5e20; }
.badge-public  { background: #fff9c4; color: #f57f17; }
.badge-special { background: #ffcdd2; color: #b71c1c; }

/* ─── CIDR-Referenztabelle ──────────────────────────────────── */
.cidr-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-top: 10px;
}
.cidr-table th {
  background: #0b3c5d;
  color: #fff;
  padding: 8px 12px;
  text-align: left;
}
.cidr-table td {
  padding: 7px 12px;
  border-bottom: 1px solid #e8ecf0;
}
.cidr-table tr:nth-child(even) td { background: #f7fafd; }
.cidr-table tr:hover td { background: #e0f0fb; }

/* ─── Copy-Button ───────────────────────────────────────────── */
.copy-val {
  cursor: pointer;
  font-size: 11px;
  background: #e7f3fd;
  color: #0b3c5d;
  border: none;
  border-radius: 4px;
  padding: 3px 7px;
  font-family: inherit;
  font-weight: 600;
  white-space: nowrap;
  min-height: 24px;
  transition: all .15s;
}
.copy-val:hover { background: #0b3c5d; color: #fff; }
.copy-val:focus-visible {
  outline: 2px solid #0b3c5d;
  outline-offset: 2px;
}

/* ─── VLSM ──────────────────────────────────────────────────── */
.vlsm-heading {
  font-size: 13px;
  font-weight: 700;
  color: #0b3c5d;
  margin: 12px 0 10px;
}
.vlsm-row {
  display: grid;
  grid-template-columns: 1fr 90px 44px;
  gap: 10px;
  align-items: end;
  margin-bottom: 10px;
}
.vlsm-result {
  background: #f7fafd;
  border: 1px solid #d1dce6;
  border-radius: 6px;
  padding: 12px 16px;
  margin-top: 8px;
  font-family: monospace;
  font-size: 13px;
  line-height: 1.8;
}

/* ─── Netzwerk aufteilen ────────────────────────────────────── */
.split-btn-wrap {
  display: flex;
  align-items: flex-end;
}

/* ─── Fokus-Sichtbarkeit (WCAG) ─────────────────────────────── */
:focus-visible {
  outline: 2px solid #0b3c5d;
  outline-offset: 2px;
}

/* ─── Responsive ────────────────────────────────────────────── */
@media (max-width: 680px) {
  .grid2, .grid3 { grid-template-columns: 1fr; }

  .result-grid {
    grid-template-columns: 1fr;
  }
  .result-row { display: block; }
  .rk { border-bottom: none; }
  .rv { border-bottom: 1px solid #e8ecf0; padding-top: 0; }
  .result-row:last-child .rv { border-bottom: none; }

  .vlsm-row { grid-template-columns: 1fr 80px 44px; }

  .tabs { flex-wrap: wrap; }
  .tab  { flex: 1 0 auto; text-align: center; }
}