/* PH SIM Registration — design tokens + components (MASTER-PLAN §5) */
:root {
  --c-text: #0f172a;
  --c-text-2: #334155;
  --c-text-3: #64748b;
  --c-bg: #ffffff;
  --c-bg-alt: #f8fafc;
  --c-border: #e2e8f0;
  --c-primary: #0369a1;
  --c-primary-dk: #075985;
  --c-primary-bg: #f0f9ff;
  --c-go: #047857;
  --c-go-dk: #065f46;
  --c-warn-bg: #fffbeb;
  --c-warn-bd: #f59e0b;
  --c-warn-tx: #92400e;
  --c-err-bg: #fef2f2;
  --c-err-bd: #dc2626;
  --c-err-tx: #991b1b;
  --c-ok-bg: #ecfdf5;
  --c-ok-bd: #059669;
  --c-ok-tx: #065f46;
  --c-globe: #0059b3;
  --c-smart: #c2410c;
  --c-dito: #c0002b;
  --c-tm: #6a1b9a;
  --c-tnt: #7c2d12;
  --c-sun: #a16207;
  --c-gomo: #0f766e;
  --radius: 8px;
  --radius-lg: 12px;
  --content-max: 760px;
  --wide-max: 1080px;
  /* Self-hosted Inter arrives with Kadence on WP; static preview uses system stack (no CDN). */
  --font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-display: Georgia, "Iowan Old Style", "Times New Roman", serif;
  --shadow: 0 1px 2px rgb(15 23 42 / 6%), 0 4px 12px rgb(15 23 42 / 4%);
  --transition: 200ms ease;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--c-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--c-primary-dk);
}

:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--c-primary);
  color: #fff;
  padding: 8px 16px;
  z-index: 1000;
}
.skip-link:focus {
  left: 8px;
  top: 8px;
}

/* Trust bar */
.trust-bar {
  background: var(--c-bg-alt);
  border-bottom: 1px solid var(--c-border);
  font-size: 14px;
  color: var(--c-text-2);
  padding: 8px 16px;
  text-align: center;
}
.trust-bar strong {
  color: var(--c-text);
  font-weight: 600;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--c-border);
  background: var(--c-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: var(--wide-max);
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--c-text);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
}
.logo-chip {
  background: var(--c-primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 7px;
  border-radius: 4px;
  letter-spacing: 0.04em;
}
.nav-desktop {
  display: none;
  align-items: center;
  gap: 4px;
}
.nav-desktop a {
  text-decoration: none;
  color: var(--c-text-2);
  font-size: 15px;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}
.nav-desktop a:hover {
  background: var(--c-bg-alt);
  color: var(--c-text);
}
.nav-dropdown {
  position: relative;
}
.nav-dropdown summary {
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text-2);
  padding: 8px 12px;
  border-radius: var(--radius);
}
.nav-dropdown summary::-webkit-details-marker {
  display: none;
}
.nav-dropdown[open] summary,
.nav-dropdown summary:hover {
  background: var(--c-bg-alt);
  color: var(--c-text);
}
.nav-dropdown-panel {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 8px;
  display: flex;
  flex-direction: column;
}
.nav-dropdown-panel a {
  padding: 10px 12px;
}
.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  border: 1px solid var(--c-border);
  background: #fff;
  border-radius: var(--radius);
  cursor: pointer;
}
.mobile-nav {
  display: none;
  border-top: 1px solid var(--c-border);
  padding: 12px 16px 20px;
  background: #fff;
}
.mobile-nav.is-open {
  display: block;
}
.mobile-nav a {
  display: block;
  padding: 12px 8px;
  text-decoration: none;
  color: var(--c-text);
  font-weight: 600;
  border-bottom: 1px solid var(--c-border);
}
.mobile-nav-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 16px;
}

@media (min-width: 900px) {
  .nav-desktop {
    display: flex;
  }
  .menu-toggle {
    display: none;
  }
}

/* Layout */
.wrap {
  max-width: var(--wide-max);
  margin: 0 auto;
  padding: 0 16px;
}
.wrap-narrow {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 16px;
}
main {
  padding: 24px 0 64px;
}

/* Typography */
h1,
h2,
h3,
h4 {
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--c-text);
  font-family: var(--font-display);
  font-weight: 700;
}
h1 {
  font-size: clamp(26px, 4vw, 36px);
  margin: 0 0 12px;
}
h2 {
  font-size: clamp(21px, 3vw, 27px);
  margin: 40px 0 12px;
}
h3 {
  font-size: clamp(18px, 2.5vw, 21px);
  margin: 28px 0 8px;
  font-family: var(--font);
}
.dek {
  font-size: 18px;
  color: var(--c-text-2);
  margin: 0 0 16px;
  max-width: 62ch;
}
.meta-line {
  font-size: 14px;
  color: var(--c-text-3);
  margin-bottom: 20px;
}
.lead {
  font-size: 18px;
  color: var(--c-text);
  margin: 0 0 24px;
}
.lead strong {
  font-weight: 700;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 20px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 16px;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition),
    box-shadow var(--transition);
}
.btn-go {
  background: var(--c-go);
  color: #fff;
}
.btn-go:hover {
  background: var(--c-go-dk);
  color: #fff;
}
.btn-primary {
  background: var(--c-primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--c-primary-dk);
  color: #fff;
}
.btn-outline {
  background: transparent;
  border-color: var(--c-border);
  color: var(--c-text);
}
.btn-outline:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
}
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 16px 0 24px;
}
.btn-block {
  width: 100%;
}

/* Cards / grids */
.network-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 24px 0;
}
@media (min-width: 768px) {
  .network-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}
.network-card {
  display: block;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 16px;
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.network-card:hover {
  border-color: var(--c-primary);
  box-shadow: var(--shadow);
}
.network-card .chip {
  display: inline-flex;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-weight: 800;
  font-size: 14px;
  margin-bottom: 10px;
}
.network-card h3 {
  margin: 0 0 4px;
  font-size: 16px;
}
.network-card p {
  margin: 0;
  font-size: 14px;
  color: var(--c-text-3);
}
.chip {
  display: inline-flex;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-weight: 800;
  font-size: 12px;
  margin-bottom: 10px;
}
.chip-globe,
.chip.globe {
  background: color-mix(in srgb, var(--c-globe) 12%, white);
  color: var(--c-globe);
}
.chip-tm,
.chip.tm {
  background: color-mix(in srgb, var(--c-tm) 12%, white);
  color: var(--c-tm);
}
.chip-gomo,
.chip.gomo {
  background: color-mix(in srgb, var(--c-gomo) 12%, white);
  color: var(--c-gomo);
}
.chip-smart,
.chip.smart {
  background: color-mix(in srgb, var(--c-smart) 12%, white);
  color: var(--c-smart);
}
.chip-tnt,
.chip.tnt {
  background: color-mix(in srgb, var(--c-tnt) 12%, white);
  color: var(--c-tnt);
}
.chip-dito,
.chip.dito {
  background: color-mix(in srgb, var(--c-dito) 12%, white);
  color: var(--c-dito);
}
.chip-sun,
.chip.sun {
  background: color-mix(in srgb, var(--c-sun) 12%, white);
  color: var(--c-sun);
}
.network-card strong {
  display: block;
  font-size: 16px;
  margin-bottom: 4px;
}
.network-card > span:last-child {
  display: block;
  font-size: 13px;
  color: var(--c-text-3);
}
.home-hero {
  padding: 8px 0 8px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 16px 0 28px;
}

.quick-grid {
  display: grid;
  gap: 12px;
  margin: 24px 0;
}
@media (min-width: 640px) {
  .quick-grid {
    grid-template-columns: 1fr 1fr;
  }
}
.quick-card {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  text-decoration: none;
  color: inherit;
  background: var(--c-bg-alt);
  transition: border-color var(--transition), background var(--transition);
}
.quick-card:hover {
  border-color: var(--c-primary);
  background: #fff;
}
.quick-card h3 {
  margin: 0 0 6px;
  font-size: 16px;
}
.quick-card p {
  margin: 0;
  font-size: 14px;
  color: var(--c-text-3);
}

/* Taglish box */
.taglish {
  background: var(--c-primary-bg);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  margin: 20px 0 24px;
  border: 1px solid color-mix(in srgb, var(--c-primary) 18%, white);
}
.taglish-label {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-primary-dk);
  margin: 0 0 6px;
}
.taglish p {
  margin: 0;
  color: var(--c-text);
}

/* Info boxes */
.info {
  border-radius: var(--radius);
  padding: 14px 16px;
  margin: 16px 0;
  border-left: 4px solid;
  background: var(--c-bg-alt);
}
.info-ok {
  background: var(--c-ok-bg);
  border-color: var(--c-ok-bd);
  color: var(--c-ok-tx);
}
.info-warn {
  background: var(--c-warn-bg);
  border-color: var(--c-warn-bd);
  color: var(--c-warn-tx);
}
.info-err {
  background: var(--c-err-bg);
  border-color: var(--c-err-bd);
  color: var(--c-err-tx);
}
.info-note {
  border-color: var(--c-primary);
  background: var(--c-primary-bg);
}

/* Steps */
.steps {
  list-style: none;
  padding: 0;
  margin: 24px 0;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 0 0 28px 52px;
  border-left: 2px solid var(--c-border);
  margin-left: 14px;
}
.step:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: -15px;
  top: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--c-primary-dk);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step h3 {
  margin-top: 0;
}
.step-figure {
  margin: 12px 0;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-bg-alt);
}
.step-figure .placeholder {
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-text-3);
  font-size: 14px;
  padding: 24px;
  text-align: center;
}
.step-figure figcaption {
  font-size: 13px;
  color: var(--c-text-3);
  padding: 8px 12px;
  border-top: 1px solid var(--c-border);
}

/* Portal CTA */
.portal-cta {
  background: var(--c-ok-bg);
  border: 1px solid var(--c-ok-bd);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin: 24px 0;
}
.portal-cta .btn {
  margin-bottom: 10px;
}
.portal-meta {
  font-size: 13px;
  color: var(--c-ok-tx);
  margin: 0;
}

/* Badge */
.carrier-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid currentColor;
  margin-bottom: 12px;
}

/* Accordion FAQ */
.faq details {
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  background: #fff;
}
.faq summary {
  cursor: pointer;
  padding: 14px 16px;
  font-weight: 700;
  list-style: none;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::after {
  content: "+";
  float: right;
  color: var(--c-text-3);
  font-weight: 400;
}
.faq details[open] summary::after {
  content: "–";
}
.faq .faq-body {
  padding: 0 16px 16px;
  color: var(--c-text-2);
}
.error-chip {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
  background: var(--c-bg-alt);
  border: 1px solid var(--c-border);
  border-radius: 4px;
  padding: 2px 6px;
}

/* Tables */
.table-wrap {
  overflow-x: auto;
  margin: 20px 0;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}
table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
  font-size: 15px;
}
th,
td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--c-border);
  text-align: left;
  vertical-align: top;
}
th {
  background: var(--c-bg-alt);
  font-weight: 700;
}
th:first-child,
td:first-child {
  position: sticky;
  left: 0;
  background: #fff;
  box-shadow: 1px 0 0 var(--c-border);
}
th:first-child {
  background: var(--c-bg-alt);
}

/* Tools */
.tool-card {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  background: #fff;
  box-shadow: var(--shadow);
  margin: 20px 0 28px;
}
.tool-card h2 {
  margin-top: 0;
  font-size: 20px;
}
.tool-options {
  display: grid;
  gap: 10px;
  margin: 16px 0;
}
.tool-option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 14px 16px;
  cursor: pointer;
  min-height: 48px;
  transition: border-color var(--transition), background var(--transition);
}
.tool-option:hover,
.tool-option:has(input:checked) {
  border-color: var(--c-primary);
  background: var(--c-primary-bg);
}
.tool-option input {
  margin-top: 4px;
  width: 18px;
  height: 18px;
}
.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}
.tool-result {
  margin-top: 16px;
}
.tool-hidden {
  display: none !important;
}

/* ID checklist */
.id-grid {
  display: grid;
  gap: 10px;
  margin: 16px 0;
}
@media (min-width: 640px) {
  .id-grid {
    grid-template-columns: 1fr 1fr;
  }
}
.id-item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 12px;
  background: #fff;
}
.id-item svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--c-go);
}
.id-tag {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--c-text-3);
}

/* Author / related / sources */
.author-box {
  display: flex;
  gap: 16px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 16px;
  margin: 40px 0 24px;
  background: var(--c-bg-alt);
}
.author-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--c-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  flex-shrink: 0;
}
.author-box h3 {
  margin: 0 0 4px;
  font-size: 16px;
}
.author-box p {
  margin: 0;
  font-size: 14px;
  color: var(--c-text-2);
}
.sources {
  font-size: 14px;
  color: var(--c-text-2);
}
.sources ul {
  padding-left: 18px;
}
.related-grid {
  display: grid;
  gap: 12px;
}
@media (min-width: 640px) {
  .related-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}
.related-grid a {
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 14px;
  text-decoration: none;
  color: var(--c-text);
  font-weight: 600;
  font-size: 15px;
  transition: border-color var(--transition);
}
.related-grid a:hover {
  border-color: var(--c-primary);
}

/* Ad slots reserved but visually dormant until month 3 */
.ad-slot {
  display: none;
  min-height: 0;
  margin: 0;
  padding: 0;
  border: 0;
  overflow: hidden;
}
.ad-slot.is-active {
  display: flex;
  min-height: 90px;
  margin: 24px 0;
  border: 1px dashed var(--c-border);
  border-radius: var(--radius);
  align-items: center;
  justify-content: center;
  color: var(--c-text-3);
  font-size: 12px;
  background: var(--c-bg-alt);
}

/* Breadcrumbs */
.breadcrumbs {
  font-size: 13px;
  margin: 0 0 16px;
  color: var(--c-text-3);
}
.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0;
  margin: 0;
}
.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-left: 6px;
  color: var(--c-border);
}
.breadcrumbs a {
  color: var(--c-text-2);
  text-decoration: none;
}
.breadcrumbs a:hover {
  color: var(--c-primary);
  text-decoration: underline;
}

.id-checklist {
  padding-left: 1.2em;
  margin: 12px 0 20px;
}
.id-checklist.two-col {
  columns: 1;
}
@media (min-width: 640px) {
  .id-checklist.two-col {
    columns: 2;
    column-gap: 24px;
  }
}
.network-selector,
.id-preview,
.home-updates {
  margin: 32px 0;
}

/* How it works */
.how-steps {
  display: grid;
  gap: 16px;
  margin: 24px 0;
}
@media (min-width: 768px) {
  .how-steps {
    grid-template-columns: repeat(3, 1fr);
  }
}
.how-step {
  background: var(--c-bg-alt);
  border-radius: var(--radius-lg);
  padding: 18px;
  border: 1px solid var(--c-border);
}
.how-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--c-primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 13px;
  margin-bottom: 10px;
}

/* Comparison strip */
.compare-strip {
  display: grid;
  gap: 8px;
  margin: 24px 0;
}
@media (min-width: 768px) {
  .compare-strip {
    grid-template-columns: repeat(3, 1fr);
  }
}
.compare-item {
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 14px;
}
.compare-item h3 {
  margin: 0 0 6px;
  font-size: 15px;
}
.compare-item p {
  margin: 0;
  font-size: 14px;
  color: var(--c-text-2);
}

/* Footer */
.site-footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 48px 0 24px;
  margin-top: 48px;
}
.footer-grid {
  display: grid;
  gap: 28px;
  max-width: var(--wide-max);
  margin: 0 auto;
  padding: 0 16px 32px;
}
@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}
.site-footer a {
  color: #e2e8f0;
  text-decoration: none;
}
.site-footer a:hover {
  color: #fff;
  text-decoration: underline;
}
.site-footer h3 {
  color: #fff;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 12px;
  font-family: var(--font);
}
.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.site-footer li {
  margin-bottom: 8px;
  font-size: 14px;
}
.footer-brand {
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}
.footer-disclaimer {
  border-top: 1px solid #334155;
  max-width: var(--wide-max);
  margin: 0 auto;
  padding: 20px 16px 0;
  font-size: 13px;
  color: #94a3b8;
}
.footer-disclaimer a {
  color: #7dd3fc;
}

/* TOC */
.toc {
  background: var(--c-bg-alt);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin: 20px 0;
}
.toc summary {
  font-weight: 700;
  cursor: pointer;
}
.toc ol {
  margin: 10px 0 0;
  padding-left: 20px;
}
.toc a {
  text-decoration: none;
  color: var(--c-text-2);
  font-size: 14px;
}

/* Affiliate disclosure */
.affiliate-note {
  font-size: 13px;
  color: var(--c-text-3);
  border-left: 3px solid var(--c-border);
  padding-left: 12px;
  margin: 16px 0;
}

/* 404 */
.not-found {
  text-align: center;
  padding: 64px 16px;
}