/* ==========================================================================
   global.css — smsactivate.mx
   Reset, design tokens, typography, header, footer, shared utilities
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens (CSS Custom Properties)
   -------------------------------------------------------------------------- */
:root {
  /* Colors */
  --color-bg:       #0f1420;
  --color-surface:  #1a2438;
  --color-surface-alt: #151e30;
  --color-accent:   #f5c518;
  --color-accent-dark: #d4a800;
  --color-green:    #22c55e;
  --color-text:     #e8eaf0;
  --color-text-muted: #8a96b0;
  --color-heading:  #ffffff;
  --color-border:   #2a3a5c;
  --color-danger:   #ef4444;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'Cascadia Code', 'Fira Code', 'Consolas', 'Monaco', monospace;

  /* Spacing */
  --spacing-xs:  4px;
  --spacing-sm:  8px;
  --spacing-md:  16px;
  --spacing-lg:  24px;
  --spacing-xl:  40px;
  --spacing-2xl: 64px;
  --spacing-3xl: 80px;

  /* Layout */
  --container-max: 1200px;
  --border-radius: 8px;
  --border-radius-sm: 6px;
  --border-radius-lg: 12px;

  /* Header */
  --header-height: 64px;
}

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

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

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-family);
  line-height: 1.7;
  min-height: 100vh;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-heading);
  font-weight: 700;
  line-height: 1.3;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); }
h3 { font-size: clamp(1.15rem, 2.5vw, 1.4rem); }
h4 { font-size: 1.1rem; }

p {
  margin-bottom: 1em;
}

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

code, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

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

@media (min-width: 768px) {
  .container {
    padding-left: var(--spacing-xl);
    padding-right: var(--spacing-xl);
  }
}

.section {
  padding-top: var(--spacing-3xl);
  padding-bottom: var(--spacing-3xl);
}

@media (max-width: 768px) {
  .section {
    padding-top: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
  }
}

.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;
}

.text-center { text-align: center; }
.text-muted  { color: var(--color-text-muted); }

/* --------------------------------------------------------------------------
   4. Buttons
   -------------------------------------------------------------------------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 12px 28px;
  background-color: var(--color-accent);
  color: #0f1420;
  font-weight: 700;
  font-size: 1rem;
  border-radius: var(--border-radius-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.2s ease, transform 0.15s ease;
  white-space: nowrap;
}

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  color: #0f1420;
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 27px;
  background-color: transparent;
  color: var(--color-accent);
  font-weight: 700;
  font-size: 1rem;
  border-radius: var(--border-radius-sm);
  border: 2px solid var(--color-accent);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}

.btn-secondary:hover {
  background-color: var(--color-accent);
  color: #0f1420;
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   5. Tables (Shared Base)
   -------------------------------------------------------------------------- */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
  margin-top: var(--spacing-lg);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 500px;
}

.data-table thead tr {
  background-color: var(--color-surface-alt);
}

.data-table thead th {
  padding: 12px 16px;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.data-table tbody tr {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.15s ease;
}

.data-table tbody tr:nth-child(even) {
  background-color: var(--color-surface-alt);
}

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

.data-table tbody tr:hover {
  background-color: #1f2e4a;
}

.data-table td {
  padding: 14px 16px;
  vertical-align: middle;
  color: var(--color-text);
}

.data-table td strong {
  color: var(--color-heading);
}

/* Rating badges */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
}

.badge-green  { background-color: rgba(34,197,94,0.15); color: #22c55e; }
.badge-yellow { background-color: rgba(245,197,24,0.15); color: #f5c518; }
.badge-gray   { background-color: rgba(138,150,176,0.15); color: #8a96b0; }

/* --------------------------------------------------------------------------
   6. FAQ Accordion (details/summary)
   -------------------------------------------------------------------------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

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

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

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

.faq-item summary::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--color-accent);
  flex-shrink: 0;
  line-height: 1;
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item summary:hover {
  background-color: var(--color-surface-alt);
}

.faq-body {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--color-text);
  line-height: 1.7;
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-md);
}

/* --------------------------------------------------------------------------
   7. Header
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(15, 20, 32, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--spacing-lg);
}

/* Logo */
.site-logo {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-heading);
  text-decoration: none;
  flex-shrink: 0;
  letter-spacing: -0.02em;
}

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

.site-logo span {
  color: var(--color-accent);
}

/* Desktop Nav */
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.site-nav__links a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s ease;
  white-space: nowrap;
}

.site-nav__links a:hover {
  color: var(--color-heading);
  text-decoration: none;
}

.site-nav__cta {
  flex-shrink: 0;
}

/* Mobile menu — CSS-only checkbox hack */
.menu-toggle {
  display: none;
}

.menu-icon {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--border-radius-sm);
}

.menu-icon span {
  display: block;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

@media (max-width: 767px) {
  .menu-icon {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--spacing-lg);
    gap: var(--spacing-lg);
    transform: translateY(-110%);
    transition: transform 0.3s ease;
    z-index: 99;
  }

  .menu-toggle:checked ~ .site-header .site-nav,
  .menu-toggle:checked + label ~ .site-nav {
    transform: translateY(0);
  }

  .site-nav__links {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
    width: 100%;
  }

  .site-nav__links a {
    font-size: 1rem;
    padding: 8px 0;
    width: 100%;
    border-bottom: 1px solid var(--color-border);
  }

  .site-nav__cta {
    width: 100%;
  }

  .site-nav__cta .btn-primary {
    width: 100%;
    justify-content: center;
  }
}

/* Mobile menu toggle animation */
.menu-toggle:checked ~ label .menu-icon span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle:checked ~ label .menu-icon span:nth-child(2) {
  opacity: 0;
}
.menu-toggle:checked ~ label .menu-icon span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   8. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-surface-alt);
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-2xl);
}

/* Footer CTA Banner */
.footer-cta {
  background: linear-gradient(135deg, #1a2438 0%, #0f1a2e 100%);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

.footer-cta__title {
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: var(--spacing-lg);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Footer Grid */
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-2xl);
  padding: var(--spacing-2xl) 0;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
}

.footer-col__title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
}

.footer-col__desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-col ul a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* Footer Bottom Bar */
.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
}

.footer-bottom__inner {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  align-items: center;
  text-align: center;
}

.footer-bottom__copy {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.footer-bottom__disclaimer {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  opacity: 0.7;
  max-width: 700px;
}

/* --------------------------------------------------------------------------
   9. Section Heading Pattern
   -------------------------------------------------------------------------- */
.section-header {
  margin-bottom: var(--spacing-xl);
}

.section-header h2,
.section-header h3 {
  margin-bottom: var(--spacing-sm);
}

.section-header p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  max-width: 700px;
}

/* --------------------------------------------------------------------------
   10. CTA Block (centered, between sections)
   -------------------------------------------------------------------------- */
.cta-block {
  display: flex;
  justify-content: center;
  margin-top: var(--spacing-xl);
}

/* --------------------------------------------------------------------------
   11. SVG Icon helpers
   -------------------------------------------------------------------------- */

/* Flow diagram icons */
.flow-icon {
  width: 28px;
  height: 28px;
  color: var(--color-accent);
  display: block;
}

/* Star rating icons */
.rating-stars {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.star {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.star-filled { color: var(--color-accent); }
.star-empty  { color: var(--color-border); }

/* Do's & Don'ts heading icons */
.heading-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  display: inline-block;
  vertical-align: middle;
  margin-right: 4px;
  margin-bottom: 2px;
}

.heading-icon--check { color: var(--color-green); }
.heading-icon--cross  { color: var(--color-danger); }

/* --------------------------------------------------------------------------
   12. Card Surface
   -------------------------------------------------------------------------- */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
}