/* ==========================================================================
   global.css — Shared styles for sms-activator.biz
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
  --color-primary: #2563EB;
  --color-primary-dark: #1D4ED8;
  --color-primary-light: #DBEAFE;
  --color-bg: #EEF2FF;
  --color-bg-alt: #F0F4FF;
  --color-dark: #0F172A;
  --color-text: #111827;
  --color-muted: #6B7280;
  --color-white: #FFFFFF;
  --color-border: #E2E8F0;
  --color-success: #16A34A;
  --color-danger: #DC2626;
  --color-warning: #D97706;

  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-sm: 6px;
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.12);
  --shadow-nav: 0 1px 8px rgba(0, 0, 0, 0.08);

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;

  --container-max: 1200px;
  --container-pad: 24px;

  --transition: 0.2s ease;
}

/* --------------------------------------------------------------------------
   2. CSS Reset / Normalize
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font: inherit;
  border: none;
  background: none;
}

button {
  cursor: pointer;
}

table {
  border-collapse: collapse;
  width: 100%;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--color-text);
}

p {
  margin-bottom: 1em;
}

p:last-child {
  margin-bottom: 0;
}

strong {
  font-weight: 600;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-bg);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

pre {
  font-family: var(--font-mono);
  overflow-x: auto;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2rem 0;
}

/* --------------------------------------------------------------------------
   3. Layout Utilities
   -------------------------------------------------------------------------- */
.container {
  max-width: var(--container-max);
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   4. Buttons
   -------------------------------------------------------------------------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1;
  padding: 12px 24px;
  border-radius: var(--radius-btn);
  border: 2px solid var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--transition), border-color var(--transition), transform var(--transition);
  min-height: 44px;
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background-color: transparent;
  color: var(--color-white);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1;
  padding: 12px 24px;
  border-radius: var(--radius-btn);
  border: 2px solid var(--color-white);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
  min-height: 44px;
}

.btn-outline:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
  min-height: 36px;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.125rem;
  min-height: 52px;
}

/* --------------------------------------------------------------------------
   5. Header / Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-nav);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-text);
  font-size: 1.25rem;
  font-weight: 700;
  white-space: nowrap;
  flex-shrink: 0;
}

.site-logo:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.site-logo .logo-icon {
  width: 32px;
  height: 32px;
  background-color: var(--color-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1rem;
  flex-shrink: 0;
}

/* Desktop nav */
.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  justify-content: flex-end;
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__links li a {
  display: block;
  padding: 8px 14px;
  color: var(--color-text);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background-color var(--transition), color var(--transition);
  min-height: 44px;
  display: flex;
  align-items: center;
}

.site-nav__links li a:hover {
  background-color: var(--color-bg);
  color: var(--color-primary);
  text-decoration: none;
}

.site-nav__cta {
  margin-left: 12px;
}

/* --------------------------------------------------------------------------
   6. Mobile Hamburger (CSS-only checkbox hack)
   -------------------------------------------------------------------------- */
#mobile-menu-toggle {
  display: none;
}

.hamburger-label {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  cursor: pointer;
  padding: 10px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition);
  flex-shrink: 0;
}

.hamburger-label:hover {
  background-color: var(--color-bg);
}

.hamburger-label span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}

/* Animate hamburger to X when checked */
#mobile-menu-toggle:checked ~ .site-header .hamburger-label span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

#mobile-menu-toggle:checked ~ .site-header .hamburger-label span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

#mobile-menu-toggle:checked ~ .site-header .hamburger-label span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav panel */
.mobile-nav {
  display: none;
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  padding: 16px var(--container-pad) 24px;
  z-index: 999;
}

#mobile-menu-toggle:checked ~ .site-header .mobile-nav {
  display: block;
}

.mobile-nav__links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-nav__links li a {
  display: block;
  padding: 12px 0;
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 500;
  border-bottom: 1px solid var(--color-border);
  text-decoration: none;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.mobile-nav__links li:last-child a {
  border-bottom: none;
}

.mobile-nav__links li a:hover {
  color: var(--color-primary);
}

.mobile-nav__cta {
  display: block;
  margin-top: 16px;
  width: 100%;
  text-align: center;
}

/* --------------------------------------------------------------------------
   7. Footer CTA Banner
   -------------------------------------------------------------------------- */
.footer-cta {
  background-color: var(--color-primary);
  padding: 64px var(--container-pad);
  text-align: center;
}

.footer-cta__heading {
  color: var(--color-white);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.2;
}

.footer-cta__sub {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.0625rem;
  margin-bottom: 28px;
}

/* --------------------------------------------------------------------------
   8. Footer Grid
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-dark);
  color: rgba(255, 255, 255, 0.75);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding: 56px 0 48px;
}

.footer-col__heading {
  color: var(--color-white);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.footer-col p {
  font-size: 0.9rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 0;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color var(--transition);
  display: inline-block;
  min-height: 24px;
  line-height: 24px;
}

.footer-col ul li a:hover {
  color: var(--color-white);
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-copyright {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-disclaimer {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.4);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   9. Table Styles
   -------------------------------------------------------------------------- */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  margin: 1.5rem 0;
}

.table-wrap table {
  min-width: 480px;
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-white);
}

.table-wrap table thead {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.table-wrap table thead th {
  padding: 14px 18px;
  text-align: left;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-white);
}

.table-wrap table tbody tr {
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition);
}

.table-wrap table tbody tr:last-child {
  border-bottom: none;
}

.table-wrap table tbody tr:nth-child(even) {
  background-color: #F8FAFF;
}

.table-wrap table tbody tr:hover {
  background-color: var(--color-primary-light);
}

.table-wrap table tbody td {
  padding: 13px 18px;
  font-size: 0.9375rem;
  color: var(--color-text);
  vertical-align: top;
}

/* --------------------------------------------------------------------------
   10. FAQ Accordion (details/summary)
   -------------------------------------------------------------------------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 1.5rem;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background-color: var(--color-white);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  min-height: 44px;
  user-select: none;
  transition: background-color var(--transition), color var(--transition);
  gap: 16px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '▾';
  font-size: 1.25rem;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform var(--transition);
  display: inline-block;
}

.faq-item[open] summary::after {
  transform: rotate(180deg);
}

.faq-item summary:hover {
  background-color: var(--color-bg);
  color: var(--color-primary);
}

.faq-item[open] summary {
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg);
}

.faq-answer {
  padding: 18px 22px;
  font-size: 0.9375rem;
  color: var(--color-muted);
  line-height: 1.7;
}

.faq-answer p {
  margin-bottom: 0.75em;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   11. Section Base
   -------------------------------------------------------------------------- */
section {
  padding: 64px 0;
}

.section-label {
  display: inline-block;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 12px;
}

.section-heading {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.section-heading span {
  color: var(--color-primary);
}

.section-sub {
  font-size: 1.0625rem;
  color: var(--color-muted);
  max-width: 640px;
}

.section-sub--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

/* --------------------------------------------------------------------------
   12. Card
   -------------------------------------------------------------------------- */
.card {
  background-color: var(--color-white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 28px;
}

/* --------------------------------------------------------------------------
   13. Inline CTA blocks
   -------------------------------------------------------------------------- */
.inline-cta {
  text-align: center;
  margin-top: 40px;
  padding: 32px;
  background-color: var(--color-bg);
  border-radius: var(--radius-card);
}

.inline-cta p {
  color: var(--color-muted);
  margin-bottom: 16px;
  font-size: 0.9375rem;
}

/* --------------------------------------------------------------------------
   14. Responsive Breakpoints
   -------------------------------------------------------------------------- */

/* ---- Tablet (≤ 1024px) ---- */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

/* ---- Mobile (≤ 768px) ---- */
@media (max-width: 768px) {
  :root {
    --container-pad: 16px;
  }

  .site-nav__links,
  .site-nav__cta {
    display: none;
  }

  .hamburger-label {
    display: flex;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  section {
    padding: 48px 0;
  }

  .section-heading {
    font-size: 1.625rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 0 32px;
  }

  .footer-cta__heading {
    font-size: 1.5rem;
  }

  .footer-cta {
    padding: 48px var(--container-pad);
  }

  .faq-item summary {
    font-size: 0.9375rem;
    padding: 14px 16px;
  }

  .faq-answer {
    padding: 14px 16px;
  }
}

/* ---- Small Mobile (≤ 480px) ---- */
@media (max-width: 480px) {
  .section-heading {
    font-size: 1.375rem;
  }

  .btn-primary,
  .btn-outline {
    width: 100%;
    justify-content: center;
  }

  .table-wrap table thead th,
  .table-wrap table tbody td {
    padding: 10px 12px;
    font-size: 0.875rem;
  }
}