/* ── Fonts ────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500&family=JetBrains+Mono:wght@400;500&display=swap');

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

/* ── Base ─────────────────────────────────────────────────── */
html {
  scroll-behavior: smooth;
  background-color: var(--surface-canvas);
  color: var(--color-ink-black);
  font-family: var(--font-primary);
  font-size: var(--text-body-sm);
  line-height: var(--leading-body-sm);
  letter-spacing: var(--tracking-body-sm);
  font-weight: var(--font-weight-regular);
  -webkit-font-smoothing: antialiased;
}

body { overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
strong { font-weight: var(--font-weight-medium); }

/* ── Nav ──────────────────────────────────────────────────── */
.bmi-nav {
  background-color: var(--surface-canvas);
  border-bottom: 1px solid var(--color-ink-black);
  height: 64px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.bmi-nav-inner {
  max-width: var(--page-max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-24);
  display: flex;
  align-items: center;
  gap: var(--spacing-24);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
  color: var(--color-ink-black);
  flex-shrink: 0;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-nav);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.logo-text {
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--tracking-body-sm);
}

.bmi-nav-links {
  display: flex;
  gap: var(--spacing-24);
  flex: 1;
  justify-content: center;
}

.bmi-nav-link {
  font-size: var(--text-body-sm);
  letter-spacing: var(--tracking-body-sm);
  color: var(--color-ash-gray);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.bmi-nav-link:hover,
.bmi-nav-link.active {
  color: var(--color-ink-black);
  border-bottom-color: var(--color-ink-black);
}

.btn-back {
  flex-shrink: 0;
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-caption);
  color: var(--color-ink-black);
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-buttons);
  padding: 6px 14px;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.btn-back:hover {
  background-color: var(--color-ink-black);
  color: var(--color-paper-white);
}

/* ── Page Hero ────────────────────────────────────────────── */
.page-hero {
  background-color: var(--surface-fog-card);
  border-bottom: 1px solid var(--color-ink-black);
  padding: var(--spacing-96) var(--spacing-24);
}

.page-hero-inner {
  max-width: var(--page-max-width);
  margin: 0 auto;
}

.page-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-6);
  margin-bottom: var(--spacing-24);
}

.meta-tag {
  display: inline-block;
  font-size: var(--text-caption);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.06em;
  color: var(--color-ink-black);
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-buttons);
  padding: 4px 12px;
  text-transform: uppercase;
}

.page-hero-heading {
  font-size: var(--text-heading);
  font-weight: var(--font-weight-medium);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink-black);
  margin-bottom: var(--spacing-12);
}

.page-hero-sub {
  font-size: var(--text-body-sm);
  letter-spacing: var(--tracking-body-sm);
  color: var(--color-ash-gray);
  line-height: var(--leading-body-sm);
  max-width: 600px;
}

/* ── Main Layout ──────────────────────────────────────────── */
.calc-main {
  padding: var(--section-gap) var(--spacing-24);
  background-color: var(--surface-canvas);
  border-bottom: 1px solid var(--color-ink-black);
}

.ip-container {
  max-width: var(--page-max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-24);
}

/* Panel Card Container */
.calc-panel {
  background-color: var(--surface-canvas);
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-cards);
  padding: var(--spacing-24);
}

.panel-label {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--color-ash-gray);
  margin-bottom: var(--spacing-18);
  text-transform: uppercase;
}

/* ── IP Hero Box ──────────────────────────────────────────── */
.ip-hero-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--spacing-48) var(--spacing-24);
  background-color: var(--surface-fog-card);
}

.ip-eyebrow {
  font-family: var(--font-primary);
  font-size: var(--text-caption);
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-ash-gray);
  margin-bottom: var(--spacing-12);
}

.ip-loader {
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
  font-size: var(--text-body-sm);
  color: var(--color-ink-black);
}

.ip-pulse {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-ink-black);
  animation: ip-pulse 1.2s infinite;
}

@keyframes ip-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.4; }
}

.ip-err {
  font-size: var(--text-body-sm);
  color: var(--color-ink-black);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
  align-items: center;
}

.btn-link {
  background: none;
  border: none;
  font-family: var(--font-primary);
  font-size: var(--text-caption);
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--color-ink-black);
  text-decoration: underline;
  cursor: pointer;
}

.ip-display-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-16);
  flex-wrap: wrap;
}

.ip-val {
  font-family: var(--font-mono);
  font-size: clamp(28px, 6vw, 48px);
  font-weight: 500;
  color: var(--color-ink-black);
  letter-spacing: -0.02em;
  word-break: break-all;
}

.ip-actions {
  display: flex;
  gap: var(--spacing-6);
}

.ip-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-nav);
  background-color: var(--surface-canvas);
  color: var(--color-ink-black);
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.ip-action-btn:hover {
  background-color: var(--surface-fog-card);
}

.ip-pills-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-6);
  margin-top: var(--spacing-16);
}

.ip-pill {
  font-family: var(--font-primary);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: var(--radius-buttons);
  border: 1px solid var(--color-ink-black);
  text-transform: uppercase;
}

.pill-blue { background-color: var(--surface-canvas); color: var(--color-ink-black); }
.pill-green { background-color: var(--color-highlighter-yellow); color: var(--color-ink-black); }
.pill-gray { background-color: var(--surface-canvas); color: var(--color-ink-black); border-color: var(--color-ash-gray); }

/* ── Geolocation Banner ───────────────────────────────────── */
.ip-geo-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-24);
  flex-wrap: wrap;
  border-color: var(--color-ink-black);
}

.geo-banner-content {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-12);
  flex: 1;
  min-width: 280px;
}

.geo-banner-icon {
  font-size: 22px;
  margin-top: 2px;
}

.geo-banner-text h4 {
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-ink-black);
  margin-bottom: 2px;
}

.geo-banner-text p {
  font-size: var(--text-caption);
  color: var(--color-ash-gray);
  line-height: var(--leading-caption);
}

.btn-gps {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-6);
  height: 44px;
  background-color: var(--color-highlighter-yellow);
  color: var(--color-ink-black);
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-buttons);
  padding: 0 var(--spacing-18);
  font-family: var(--font-primary);
  font-size: var(--text-caption);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.04em;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.15s ease;
}

.btn-gps:hover:not(:disabled) {
  opacity: 0.88;
}

.btn-gps:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.gps-spin {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--color-ink-black);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── Precise GPS details ──────────────────────────────────── */
.gps-details-card {
  border-color: var(--color-ink-black);
}

.gps-full-address {
  font-size: var(--text-body-sm);
  color: var(--color-ink-black);
  padding-bottom: var(--spacing-12);
  border-bottom: 1px solid var(--color-ink-black);
  margin-bottom: var(--spacing-18);
}

/* ── Lookup Form ──────────────────────────────────────────── */
.ip-lookup-wrapper {
  padding: var(--spacing-18);
}

.lookup-input-row {
  display: flex;
  gap: var(--spacing-12);
}

#ip-lookup-input {
  flex: 1;
  min-width: 0;
  height: 48px;
  background-color: var(--surface-fog-card);
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-inputs);
  padding: 0 var(--spacing-18);
  font-family: var(--font-mono);
  font-size: var(--text-body-sm);
  color: var(--color-ink-black);
  outline: none;
  transition: background-color 0.15s ease;
}

#ip-lookup-input:focus {
  background-color: var(--surface-canvas);
}

#ip-lookup-input::placeholder {
  color: var(--color-ash-gray);
}

.btn-lookup {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-6);
  height: 48px;
  background-color: var(--color-ink-black);
  color: var(--color-paper-white);
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-buttons);
  padding: 0 var(--spacing-24);
  font-family: var(--font-primary);
  font-size: var(--text-caption);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: opacity 0.15s ease;
}

.btn-lookup:hover:not(:disabled) {
  opacity: 0.85;
}

.btn-lookup:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.lookup-spin {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--color-paper-white);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.lookup-error-msg {
  font-size: var(--text-caption);
  color: var(--color-ink-black);
  margin-top: var(--spacing-8);
  padding-left: var(--spacing-6);
}

/* ── Tabs ─────────────────────────────────────────────────── */
.ip-tabs {
  display: flex;
  gap: var(--spacing-6);
}

.ip-tab-btn {
  background-color: transparent;
  color: var(--color-ash-gray);
  border: 1px solid var(--color-ash-gray);
  border-radius: var(--radius-buttons);
  padding: 6px 16px;
  font-family: var(--font-primary);
  font-size: var(--text-caption);
  font-weight: 500;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: all 0.15s ease;
}

.ip-tab-btn:hover {
  color: var(--color-ink-black);
  border-color: var(--color-ink-black);
}

.ip-tab-btn.active {
  background-color: var(--color-ink-black);
  color: var(--color-paper-white);
  border-color: var(--color-ink-black);
}

/* ── Details Grid & Rows ──────────────────────────────────── */
.ip-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-24);
}

.details-grid {
  display: flex;
  flex-direction: column;
}

.detail-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-12);
  padding: var(--spacing-12) 0;
  border-bottom: 1px solid var(--surface-fog-card);
}

.detail-row:last-child {
  border-bottom: none;
}

.detail-label {
  font-size: var(--text-caption);
  color: var(--color-ash-gray);
  flex-shrink: 0;
}

.detail-value {
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-ink-black);
  text-align: right;
  word-break: break-all;
}

.val-mono {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
}

/* ── Map Wrapper ──────────────────────────────────────────── */
.ip-map-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
}

.map-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
  flex-wrap: wrap;
}

.map-title-icon {
  font-size: 18px;
}

.map-title {
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-ink-black);
}

.map-note {
  font-size: var(--text-caption);
  color: var(--color-ash-gray);
  margin-left: auto;
}

.map-frame-container {
  height: 320px;
  border-radius: var(--radius-cards);
  overflow: hidden;
  border: 1px solid var(--color-ink-black);
}

/* ── FAQ Section ──────────────────────────────────────────── */
.faq-section {
  background-color: var(--surface-fog-card);
  padding: var(--section-gap) var(--spacing-24);
  border-bottom: 1px solid var(--color-ink-black);
}

.faq-inner {
  max-width: 780px;
  margin: 0 auto;
}

.section-header-block {
  margin-bottom: var(--spacing-48);
}

.section-eyebrow {
  display: block;
  font-size: var(--text-caption);
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-ash-gray);
  margin-bottom: var(--spacing-12);
  text-transform: uppercase;
}

.section-h2 {
  font-size: var(--text-heading-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-heading-sm);
  color: var(--color-ink-black);
}

.accordion {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
}

.acc-item {
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-cards);
  background-color: var(--surface-canvas);
  overflow: hidden;
}

.acc-header {
  width: 100%;
  background: none;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-18) var(--spacing-24);
  font-family: var(--font-primary);
  font-size: var(--text-body-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-body-sm);
  color: var(--color-ink-black);
  cursor: pointer;
  text-align: left;
  transition: background-color 0.15s ease;
}

.acc-header:hover {
  background-color: var(--surface-fog-card);
}

.acc-icon {
  font-family: var(--font-mono);
  font-size: var(--text-body-sm);
  color: var(--color-ink-black);
}

.acc-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s cubic-bezier(0, 1, 0, 1);
  padding: 0 var(--spacing-24);
}

.acc-body p {
  padding-bottom: var(--spacing-18);
  font-size: var(--text-body-sm);
  line-height: var(--leading-body-sm);
  color: var(--color-ash-gray);
}

.acc-body p strong {
  color: var(--color-ink-black);
}

/* ── Footer ───────────────────────────────────────────────── */
.bmi-footer {
  background-color: var(--surface-canvas);
  padding: var(--spacing-48) var(--spacing-24);
}

.bmi-footer-inner {
  max-width: var(--page-max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
  align-items: flex-start;
}

.footer-note {
  font-size: var(--text-caption);
  color: var(--color-ash-gray);
  line-height: var(--leading-caption);
  max-width: 640px;
}

.footer-copy {
  font-size: var(--text-caption);
  color: var(--color-ash-gray);
  margin-top: var(--spacing-6);
}

@media (max-width: 1024px) {
  .ip-grid { grid-template-columns: 1fr; }
}

/* Checkbox Hack Toggle Styles */
.nav-toggle-cb {
  display: none !important;
}

.nav-toggle-btn {
  display: none;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-ink-black);
  border-radius: var(--radius-nav);
  color: var(--color-ink-black);
  z-index: 2001;
  transition: all 0.15s ease;
}

.nav-toggle-btn:hover {
  background-color: var(--surface-fog-card);
}

.nav-toggle-cb:checked ~ .nav-toggle-btn {
  background-color: var(--color-ink-black);
  color: var(--color-paper-white);
  border-color: var(--color-ink-black);
}

.nav-toggle-cb:checked ~ .nav-toggle-btn .menu-open-icon {
  display: none !important;
}

.nav-toggle-cb:checked ~ .nav-toggle-btn .menu-close-icon {
  display: block !important;
}

@media (max-width: 768px) {
  .nav-toggle-btn {
    display: flex;
    order: 3;
  }

  .bmi-nav {
    height: 64px !important;
  }

  .bmi-nav-inner {
    height: 100% !important;
    flex-direction: row !important;
    justify-content: space-between !important;
    align-items: center !important;
    padding: 0 var(--spacing-16) !important;
    gap: var(--spacing-12) !important;
    flex-wrap: nowrap !important;
  }

  .bmi-nav-links {
    position: fixed !important;
    top: 0 !important;
    right: -300px !important;
    width: 280px !important;
    height: 100vh !important;
    background-color: var(--surface-canvas) !important;
    border-left: 1px solid var(--color-ink-black) !important;
    flex-direction: column !important;
    justify-content: flex-start !important;
    align-items: stretch !important;
    padding: 80px 24px 24px 24px !important;
    gap: 8px !important;
    z-index: 2000 !important;
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1) !important;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.08) !important;
    margin: 0 !important;
  }

  .nav-toggle-cb:checked ~ .bmi-nav-links {
    transform: translateX(-300px) !important;
  }

  .bmi-nav-link {
    font-size: 15px !important;
    padding: 12px 16px !important;
    border-bottom: none !important;
    border-left: 3px solid transparent !important;
    width: 100% !important;
    display: block !important;
    color: var(--color-ash-gray) !important;
    transition: all 0.15s ease;
    text-align: left !important;
    white-space: normal !important;
  }

  .bmi-nav-link:hover,
  .bmi-nav-link.active {
    border-left-color: var(--color-ink-black) !important;
    background-color: var(--surface-fog-card) !important;
    color: var(--color-ink-black) !important;
  }

  .btn-back {
    font-size: 11px !important;
    padding: 4px 10px !important;
    white-space: nowrap;
    flex-shrink: 0;
  }
}

@media (max-width: 640px) {
  .page-hero { padding: var(--spacing-48) var(--spacing-24); }
  .calc-main { padding: var(--spacing-48) var(--spacing-24); }
  .ip-geo-banner { flex-direction: column; align-items: flex-start; }
  .btn-gps { width: 100%; justify-content: center; }
  .lookup-input-row { flex-direction: column; }
  .btn-lookup { width: 100%; }
  .map-frame-container { height: 240px; }
  .map-note { display: none; }
}