/* ════════════════════════════════════════════════════════════
   ioFast.net — Design System
   ════════════════════════════════════════════════════════════ */
:root {
  --bg:          #060d1a;
  --bg2:         #0b1628;
  --panel:       rgba(11, 22, 44, 0.85);
  --border:      rgba(255,255,255,0.07);
  --text:        #e8f0fb;
  --muted:       #6a89b0;
  --accent:      #6c7cff;
  --accent2:     #27d1b2;
  --accent3:     #4fd6ff;
  --danger:      rgba(255,100,120,0.13);
  --danger-text: #ff9faa;
  --radius-lg:   20px;
  --radius-md:   14px;
  --radius-sm:   10px;
  color-scheme: dark;
}

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

body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 13px;
  line-height: 1.5;
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(39,209,178,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(108,124,255,0.08) 0%, transparent 60%);
  color: var(--text);
  min-height: 100vh;
}

/* ── Visually hidden (a11y) ─────────────────────────────────── */
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ════════════════════════════════════════════════════════════
   OUTER 3-COLUMN WRAPPER
   left-ad | main-col | right-ad
   ════════════════════════════════════════════════════════════ */
.site-wrapper {
  display: grid;
  grid-template-columns: 160px 1fr 300px;
  grid-template-areas: "left main right";
  gap: 0;
  min-height: 100vh;
  max-width: 1440px;
  margin: 0 auto;
}

/* ── Sidebar ad columns ──────────────────────────────────────── */
.sidebar-ad {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 80px 8px 24px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.sidebar-ad--left  { grid-area: left; }
.sidebar-ad--right { grid-area: right; }

/* ── Main content column ─────────────────────────────────────── */
.main-col {
  grid-area: main;
  display: flex;
  flex-direction: column;
  padding: 0 24px 40px;
  min-width: 0;
}

/* ════════════════════════════════════════════════════════════
   AD SLOTS (placeholder styling – replace contents with AdSense)
   ════════════════════════════════════════════════════════════ */
.ad-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px dashed rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.02);
  color: var(--muted);
}
.ad-slot--skyscraper  { width: 160px; height: 600px; }
.ad-slot--halfpage    { width: 300px; height: 600px; }
.ad-slot--leaderboard { width: 100%; max-width: 728px; height: 90px; margin: 0 auto; }

.ad-label { font-size: 10px; font-weight: 600; letter-spacing: 0.15em; text-transform: uppercase; opacity: 0.5; }
.ad-size  { font-size: 11px; opacity: 0.4; }

.leaderboard-ad {
  padding: 10px 0 6px;
}

/* ════════════════════════════════════════════════════════════
   HEADER
   ════════════════════════════════════════════════════════════ */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0 16px;
  border-bottom: 1px solid var(--border);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}
.brand-icon { width: 20px; height: 20px; color: var(--accent2); }
.brand-name { background: linear-gradient(90deg, var(--accent2), var(--accent3)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.header-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}
.lang-select {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
}
.lang-select:focus { outline: 2px solid rgba(108,124,255,0.3); }
.lang-select option { background: #0b1628; color: var(--text); }

.nav-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 12px;
  font-weight: 500;
  transition: color 0.15s;
}
.nav-link:hover { color: var(--text); }

/* ════════════════════════════════════════════════════════════
   HERO — IP + Ring
   ════════════════════════════════════════════════════════════ */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 22px 0 16px;
}

/* IP display */
.hero-ip {
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.hero-ip__label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
}
.hero-ip__value {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent2);
  font-variant-numeric: tabular-nums;
}

/* Ring */
.ring-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
}

.progress-ring {
  position: relative;
  width: 180px;
  height: 180px;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: filter 0.3s;
}
.progress-ring:hover { filter: brightness(1.1); }
.progress-ring:focus { outline: 3px solid rgba(108,124,255,0.25); border-radius: 50%; }
.progress-ring svg {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  transform: rotate(-90deg);
  transform-origin: center;
}
.progress-ring.running svg #go-ring-circle {
  filter: drop-shadow(0 0 8px rgba(39,209,178,0.5));
}

.ring-label {
  position: relative;
  z-index: 1;
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--text);
  pointer-events: none;
  user-select: none;
  text-shadow: 0 2px 12px rgba(0,0,0,0.5);
}

/* Ring pulse when running */
@keyframes ring-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.7; }
}
.progress-ring.running .ring-label { animation: ring-pulse 1.2s ease-in-out infinite; }

/* ════════════════════════════════════════════════════════════
   RESULTS PANEL
   ════════════════════════════════════════════════════════════ */
.results-panel {
  background: var(--panel);
  backdrop-filter: blur(24px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.3);
  margin-top: 6px;
}

.results-header { margin-bottom: 16px; }
.results-title  { font-size: 15px; font-weight: 700; letter-spacing: -0.01em; }
.results-sub    { font-size: 12px; color: var(--muted); margin-top: 3px; }

/* ── Metrics grid ────────────────────────────────────────────── */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}

.metric-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  transition: border-color 0.2s, background 0.2s;
}
.metric-card:hover { border-color: rgba(255,255,255,0.14); background: rgba(255,255,255,0.06); }

.metric-icon {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 2px;
}
.metric-icon--dl   { color: var(--accent3); }
.metric-icon--ul   { color: var(--accent2); }
.metric-icon--ping { color: var(--accent); }

.metric-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.metric-value {
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
  color: var(--text);
}
.metric-unit {
  font-size: 11px;
  color: var(--muted);
  font-weight: 500;
}
.metric-sublabel {
  font-size: 10px;
  color: var(--muted);
  opacity: 0.65;
  font-style: italic;
  letter-spacing: 0.01em;
  line-height: 1.3;
  margin-bottom: 2px;
}

/* ── Info row ────────────────────────────────────────────────── */
.info-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 12px;
}
.info-cell {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.info-title {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.info-value {
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Error message ───────────────────────────────────────────── */
.error-message {
  font-size: 12px;
  color: var(--danger-text);
  background: var(--danger);
  border: 1px solid rgba(255,100,120,0.18);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-bottom: 10px;
  display: none;
}
.error-message:not(:empty) { display: block; }

/* ════════════════════════════════════════════════════════════
   FOOTER
   ════════════════════════════════════════════════════════════ */
.site-footer {
  text-align: center;
  padding: 20px 0 10px;
  font-size: 11px;
  color: var(--muted);
  opacity: 0.6;
}

.footer-nav {
  text-align: center;
  padding: 0px 0 8px;
  font-size: 11px;
  color: var(--muted);
  opacity: 1;

  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin: 0 auto;
}

/* ════════════════════════════════════════════════════════════
   CONTENT PAGES (about.php, term.php)
   ════════════════════════════════════════════════════════════ */
.content-page {
  padding: 28px 0 40px;
  flex: 1;
}

.content-card {
  background: var(--panel);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.3), 0 0 0 1px rgba(255,255,255,0.03);
  max-width: 780px;
  margin: 0 auto;
  animation: fadeUp 0.45s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0);    }
}

/* Kicker / eyebrow label */
.content-kicker {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent2);
  margin-bottom: 10px;
}
.content-kicker::before {
  content: '';
  display: inline-block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent2);
}

/* Page title */
.content-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text) 40%, var(--accent3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Intro paragraph */
.content-intro {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 32px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

/* Divider between kicker area and sections */
.content-divider {
  height: 1px;
  background: var(--border);
  margin: 28px 0;
}

/* Sections */
.content-section {
  margin-bottom: 28px;
  padding: 22px 24px;
  background: rgba(255,255,255,0.025);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color 0.2s, background 0.2s;
}
.content-section:last-child { margin-bottom: 0; }
.content-section:hover {
  border-color: rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
}

.content-section h2 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--accent3);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.content-section h2::before {
  content: '';
  display: inline-block;
  width: 3px;
  height: 14px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--accent2), var(--accent));
  flex-shrink: 0;
}

.content-section p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.75;
}

/* Styled list */
.content-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.content-list li {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.65;
  display: flex;
  gap: 10px;
}
.content-list li::before {
  content: '▸';
  color: var(--accent2);
  font-size: 11px;
  flex-shrink: 0;
  margin-top: 3px;
}
.content-list li strong {
  color: var(--text);
  font-weight: 600;
}

/* Active nav link highlight */
.nav-link.active {
  color: var(--accent2);
}

/* ════════════════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════════════════ */

/* Hide left sidebar below 1100px */
@media (max-width: 1100px) {
  .site-wrapper {
    grid-template-columns: 1fr 300px;
    grid-template-areas: "main right";
  }
  .sidebar-ad--left { display: none; }
}

/* Hide right sidebar below 800px, go single column */
@media (max-width: 800px) {
  .site-wrapper {
    grid-template-columns: 1fr;
    grid-template-areas: "main";
  }
  .sidebar-ad { display: none; }
  .main-col { padding: 0 14px 32px; }
  .info-row { grid-template-columns: repeat(2, 1fr); }
  .ad-slot--leaderboard { height: 60px; }

  /* Smaller ring on mobile */
  .progress-ring { width: 150px; height: 150px; }
  .ring-label { font-size: 1.3rem; }
}

@media (max-width: 520px) {
  .metrics-grid { grid-template-columns: 1fr; }
  .info-row { grid-template-columns: 1fr 1fr; }
  .hero-ip { flex-direction: column; align-items: center; gap: 4px; }
}

/* ════════════════════════════════════════════════════════════
   CONTACT FORM
   ════════════════════════════════════════════════════════════ */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent3);
}
.form-label svg { opacity: 0.75; flex-shrink: 0; }

/* Shared base for input / select / textarea */
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
  padding: 11px 14px;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}
.form-input::placeholder,
.form-textarea::placeholder { color: var(--muted); opacity: 0.7; }

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
  border-color: rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.06);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: rgba(108,124,255,0.55);
  background: rgba(108,124,255,0.06);
  box-shadow: 0 0 0 3px rgba(108,124,255,0.12);
}

/* Select arrow */
.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236a89b0' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  cursor: pointer;
}
.form-select option { background: #0b1628; color: var(--text); }

.form-textarea {
  resize: vertical;
  min-height: 130px;
  line-height: 1.65;
}

/* Two-column row for name + email */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
@media (max-width: 520px) {
  .form-row { grid-template-columns: 1fr; }
}

/* Footer row: privacy note + submit */
.form-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.form-note {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--muted);
  opacity: 0.7;
}
.form-note svg { flex-shrink: 0; opacity: 0.6; }

/* Submit button */
.btn-submit {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  background: linear-gradient(135deg, var(--accent2) 0%, var(--accent) 100%);
  border: none;
  border-radius: var(--radius-md);
  color: #fff;
  font-family: inherit;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: filter 0.2s, transform 0.1s, box-shadow 0.2s;
  box-shadow: 0 4px 20px rgba(108,124,255,0.25);
  white-space: nowrap;
}
.btn-submit:hover:not(:disabled) {
  filter: brightness(1.12);
  box-shadow: 0 6px 28px rgba(108,124,255,0.38);
}
.btn-submit:active:not(:disabled) { transform: translateY(1px); filter: brightness(0.97); }
.btn-submit:disabled { opacity: 0.55; cursor: not-allowed; }
.btn-submit__icon { transition: transform 0.2s; }
.btn-submit:hover:not(:disabled) .btn-submit__icon { transform: translateX(3px) translateY(-2px); }

/* Alert messages */
.form-alert {
  font-size: 13px;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  display: none;
  animation: fadeUp 0.25s ease both;
}
.form-alert--success {
  display: block;
  color: #5cf0c6;
  background: rgba(39,209,178,0.08);
  border: 1px solid rgba(39,209,178,0.25);
}
.form-alert--error {
  display: block;
  color: var(--danger-text);
  background: var(--danger);
  border: 1px solid rgba(255,100,120,0.22);
}

/* ── Message character counter ─────────────────────────── */
.form-char-counter {
  margin: 6px 0 0;
  font-size: 12px;
  color: var(--muted);
  text-align: right;
  transition: color 0.2s ease;
}
.form-char-counter--over {
  color: var(--danger-text);
  font-weight: 600;
}