/* =========================================
   InternetTool – style.css
   Responsive, dark-mode, print-ready
   ========================================= */

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

:root {
  --primary:       #1565c0;
  --primary-light: #1e88e5;
  --primary-bg:    #e3f2fd;
  --success:       #2e7d32;
  --success-bg:    #e8f5e9;
  --warning:       #e65100;
  --warning-bg:    #fff3e0;
  --danger:        #c62828;
  --danger-bg:     #ffebee;
  --bg:            #f0f4f8;
  --card-bg:       #ffffff;
  --text:          #212121;
  --text-light:    #616161;
  --border:        #e0e0e0;
  --shadow:        0 2px 8px rgba(0,0,0,0.10);
  --radius:        10px;
  --header-h:      54px;
  --tab-h:         46px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary-bg:  #1a237e;
    --bg:          #121212;
    --card-bg:     #1e1e1e;
    --text:        #e0e0e0;
    --text-light:  #9e9e9e;
    --border:      #333333;
    --shadow:      0 2px 8px rgba(0,0,0,0.40);
  }
}

/* ---- BASE ---- */
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-size: 14px;
  min-height: 100vh;
}

/* ---- HEADER ---- */
header {
  background: var(--primary);
  color: #fff;
  height: var(--header-h);
  display: flex;
  align-items: center;
  padding: 0 16px;
  position: sticky;
  top: 0;
  z-index: 200;
  box-shadow: 0 2px 6px rgba(0,0,0,0.25);
}
.header-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
header h1 { font-size: 1.2rem; font-weight: 700; white-space: nowrap; }
.status-bar { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.status-badge {
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(255,255,255,0.20);
  white-space: nowrap;
}
.status-badge.online  { background: #388e3c; }
.status-badge.offline { background: #d32f2f; }

/* ---- TABS ---- */
.tabs {
  background: var(--card-bg);
  border-bottom: 2px solid var(--border);
  display: flex;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  position: sticky;
  top: var(--header-h);
  z-index: 190;
}
.tabs::-webkit-scrollbar { display: none; }
.tab {
  flex-shrink: 0;
  padding: 0 16px;
  height: var(--tab-h);
  border: none;
  background: transparent;
  color: var(--text-light);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  border-bottom: 3px solid transparent;
  transition: color .15s, border-color .15s;
  white-space: nowrap;
}
.tab:hover { color: var(--primary); }
.tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 700;
}

/* ---- MAIN ---- */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 14px 40px;
}
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ---- SECTION HEADER ---- */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}
.section-header h2 { font-size: 1.25rem; font-weight: 700; }

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: opacity .15s, transform .1s;
  white-space: nowrap;
}
.btn:hover:not(:disabled) { opacity: .88; }
.btn:active:not(:disabled) { transform: scale(.97); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-warning { background: #e65100; color: #fff; }

/* ---- CARDS ---- */
.card, .info-card, .speed-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

/* ---- DASHBOARD GRID ---- */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(155px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.card {
  padding: 18px 12px;
  text-align: center;
  transition: transform .15s;
  cursor: default;
}
.card:hover { transform: translateY(-3px); }
.card-icon  { font-size: 2rem; margin-bottom: 8px; }
.card-title { font-size: 12px; color: var(--text-light); margin-bottom: 6px; }
.card-value { font-size: 1.55rem; font-weight: 700; color: var(--primary); word-break: break-all; }
.card-value.small { font-size: .9rem; }
.card-sub   { font-size: 11px; color: var(--text-light); margin-top: 4px; }

/* ---- EXPORT BAR ---- */
.export-bar {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}
.export-bar h3 { font-size: 1rem; color: var(--primary); margin-bottom: 6px; }
.export-note { font-size: 12px; color: var(--text-light); margin-bottom: 10px; }
.export-bar .btn { margin: 0 6px 6px 0; }

/* ---- INFO GRID ---- */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}
.info-card { padding: 14px 16px; }
.info-card h3 {
  font-size: .95rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.info-card.full-width { grid-column: 1 / -1; }
.info-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  gap: 8px;
}
.info-row:last-child { border-bottom: none; }
.info-label { font-size: 13px; color: var(--text-light); font-weight: 500; flex-shrink: 0; }
.info-val   { font-size: 13px; font-weight: 600; text-align: right; word-break: break-all; }
.info-val.small { font-size: 11px; }
.info-limited { color: var(--warning); font-size: 12px; font-weight: 500; }

/* ---- SPEED TEST ---- */
.speed-results {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(145px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.speed-card { padding: 16px 12px; text-align: center; }
.speed-icon  { font-size: 1.5rem; margin-bottom: 6px; }
.speed-label { font-size: 12px; color: var(--text-light); margin-bottom: 4px; }
.speed-val   { font-size: 1.7rem; font-weight: 700; color: var(--primary); min-height: 2rem; }
.speed-unit  { font-size: 11px; color: var(--text-light); }
.speed-bar {
  height: 5px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 10px;
}
.speed-bar-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 3px;
  width: 0;
  transition: width .5s ease;
}

/* Progress bar */
.speed-progress { margin: 10px 0 16px; }
.progress-bar {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 4px;
  width: 0;
  transition: width .3s ease;
}
.progress-label { font-size: 12px; color: var(--text-light); margin-top: 4px; }

/* Assessment */
.speed-assessment {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}
.speed-assessment h3 { font-size: .95rem; color: var(--primary); margin-bottom: 10px; }
.assessment-item {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.assessment-item:last-child { border-bottom: none; }
.assessment-grade {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 12px;
  font-weight: 700;
  margin-right: 6px;
}
.grade-A { background: #c8e6c9; color: #1b5e20; }
.grade-B { background: #dcedc8; color: #33691e; }
.grade-C { background: #ffe0b2; color: #e65100; }
.grade-D { background: #ffcdd2; color: #b71c1c; }

/* History */
.speed-history { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.speed-history h3 { font-size: .95rem; color: var(--primary); margin-bottom: 10px; }
.history-list { display: grid; gap: 6px; }
.history-item {
  background: var(--bg);
  border-radius: 6px;
  padding: 8px 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  align-items: center;
}
.history-time { color: var(--text-light); flex-shrink: 0; }
.history-dl   { color: var(--primary); font-weight: 600; }

/* ---- SECURITY ---- */
.security-score-wrap { text-align: center; margin: 10px 0 20px; }
.score-circle {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  border: 6px solid var(--border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 8px;
  transition: border-color .3s, color .3s;
}
.score-circle.good   { border-color: #43a047; color: #43a047; }
.score-circle.medium { border-color: #fb8c00; color: #fb8c00; }
.score-circle.bad    { border-color: #e53935; color: #e53935; }
.score-label { font-size: 13px; color: var(--text-light); }

.security-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.security-item:last-child { border-bottom: none; }
.sec-icon   { width: 22px; text-align: center; font-size: 1.1rem; }
.sec-label  { flex: 1; font-size: 13px; }
.sec-status { font-size: 12px; font-weight: 600; }
.sec-ok   .sec-status { color: #43a047; }
.sec-warn .sec-status { color: #fb8c00; }
.sec-bad  .sec-status { color: #e53935; }

/* Risks */
.risk-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.risk-item:last-child { border-bottom: none; }
.risk-icon  { font-size: 1.2rem; }
.risk-text  { flex: 1; }
.risk-title { font-weight: 600; font-size: 13px; margin-bottom: 2px; }
.risk-desc  { font-size: 12px; color: var(--text-light); }
.risk-level {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 8px;
  flex-shrink: 0;
  align-self: flex-start;
}
.risk-high   { background: #ffcdd2; color: #b71c1c; }
.risk-medium { background: #ffe0b2; color: #e65100; }
.risk-low    { background: #fff9c4; color: #f9a825; }
.risk-info   { background: #e3f2fd; color: #1565c0; }

/* ---- SITES ---- */
.sites-list { display: grid; gap: 8px; }
.site-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow);
}
.site-favicon { width: 16px; height: 16px; flex-shrink: 0; }
.site-name    { flex: 1; font-weight: 600; font-size: 13px; }
.site-time    { font-size: 13px; color: var(--text-light); width: 75px; text-align: right; flex-shrink: 0; }
.site-bar-wrap { width: 100px; height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; flex-shrink: 0; }
.site-bar      { height: 100%; border-radius: 3px; width: 0; transition: width .5s; }
.site-status   { font-size: 12px; font-weight: 700; width: 60px; text-align: right; flex-shrink: 0; }
.status-fast   { color: #43a047; }
.status-medium { color: #fb8c00; }
.status-slow   { color: #e53935; }
.status-error  { color: #9e9e9e; }

.sites-summary {
  margin-top: 14px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 13px;
}

/* ---- DIAGNOSTICS ---- */
.diag-status {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  color: var(--text-light);
  margin-bottom: 14px;
  box-shadow: var(--shadow);
}
.diag-results  { display: grid; gap: 8px; margin-bottom: 16px; }
.diag-item {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 12px 14px;
  border-left: 4px solid var(--border);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  box-shadow: var(--shadow);
}
.diag-item.pass { border-left-color: #43a047; }
.diag-item.warn { border-left-color: #fb8c00; }
.diag-item.fail { border-left-color: #e53935; }
.diag-icon  { font-size: 1.1rem; flex-shrink: 0; }
.diag-text  { flex: 1; }
.diag-title { font-weight: 600; font-size: 13px; margin-bottom: 2px; }
.diag-desc  { font-size: 12px; color: var(--text-light); }

.diag-suggestions { margin-bottom: 14px; }
.diag-suggestions h3 { font-size: 1rem; color: var(--primary); margin-bottom: 10px; }
#suggestions-list { display: grid; gap: 8px; }
.suggestion-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  padding: 12px 14px;
  box-shadow: var(--shadow);
}
.suggestion-title { font-weight: 600; font-size: 13px; margin-bottom: 4px; }
.suggestion-desc  { font-size: 12px; color: var(--text-light); }

/* ---- BATTERY BAR ---- */
.battery-bar-wrap {
  height: 12px;
  background: var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin-top: 10px;
}
.battery-bar {
  height: 100%;
  background: #43a047;
  border-radius: 6px;
  width: 0;
  transition: width .5s, background .3s;
}

/* ---- MISC ---- */
.note {
  background: #fff8e1;
  border: 1px solid #ffe082;
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 12px;
  color: #5d4037;
  margin-bottom: 12px;
}
@media (prefers-color-scheme: dark) {
  .note { background: #3e2723; border-color: #6d4c41; color: #ffccbc; }
}
.muted { color: var(--text-light); font-size: 13px; padding: 8px 0; }

/* ---- FOOTER ---- */
footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 14px;
  text-align: center;
  color: var(--text-light);
  font-size: 12px;
  border-top: 1px solid var(--border);
}

/* ---- PRINT / PDF ---- */
@media print {
  header, nav.tabs, .btn, .export-bar, .export-note, footer,
  #speed-progress, #diag-suggestions, #export-report-json, #export-report-pdf,
  #run-diagnostics, #run-security, #run-sites, #start-speedtest, #refresh-all,
  #refresh-network, #refresh-device { display: none !important; }

  body { background: #fff; color: #000; font-size: 11pt; }
  .tab-content { display: block !important; page-break-after: always; }
  .tab-content:last-child { page-break-after: auto; }
  .tab-content::before {
    content: attr(data-title);
    display: block;
    font-size: 16pt;
    font-weight: bold;
    margin-bottom: 14px;
    color: #1565c0;
  }
  main { padding: 0; }
  .card, .info-card, .speed-card, .diag-item, .site-item, .suggestion-item {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ccc;
  }
  .info-grid, .dashboard-grid, .speed-results {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---- RESPONSIVE ---- */
@media (max-width: 600px) {
  .header-inner { gap: 8px; }
  .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
  .info-grid { grid-template-columns: 1fr; }
  .speed-results { grid-template-columns: repeat(2, 1fr); }
  .site-bar-wrap { display: none; }
  .card-value { font-size: 1.2rem; }
  .speed-val  { font-size: 1.4rem; }
}
@media (max-width: 360px) {
  .dashboard-grid { grid-template-columns: 1fr 1fr; }
  .tab { padding: 0 10px; font-size: 12px; }
}