/* =============================================================================
   Viralink IoT Theme – Main CSS
   Generated from SCSS. Edit source files in assets/scss/
   ============================================================================= */

/* ── CSS Custom Properties ──────────────────────────────────────────────────── */
:root {
  /* Brand Colors */
  --color-primary: #0066FF;
  --color-primary-dark: #0052CC;
  --color-primary-light: #3385FF;
  --color-primary-xlight: #E6F0FF;
  --color-accent: #00E5FF;
  --color-accent-dark: #00BCD4;

  /* Semantic */
  --color-success: #00C896;
  --color-warning: #FF9B00;
  --color-error: #FF3D3D;

  /* Neutral */
  --gray-50: #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;
  --gray-950: #070B14;

  /* Dark Theme (default - IoT platforms are dark) */
  --bg-base: #070B14;
  --bg-surface: #0D1120;
  --bg-surface-2: #111827;
  --bg-surface-3: #1a2235;
  --bg-card: #0D1120;
  --border: rgba(255,255,255,0.08);
  --border-2: rgba(255,255,255,0.12);
  --border-hover: rgba(255,255,255,0.2);

  /* Text */
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-tertiary: #64748B;
  --text-accent: #00E5FF;
  --text-link: #0066FF;

  /* Typography - Language Adaptive */
  --font-primary: 'Manrope', sans-serif;
  --font-secondary: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Layout */
  --container-max: 1280px;
  --container-padding: 1.5rem;
  --header-height: 72px;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.3), 0 2px 4px -1px rgba(0,0,0,0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4), 0 4px 6px -2px rgba(0,0,0,0.25);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.5);
  --glow-primary: 0 0 24px rgba(0,102,255,0.35);
  --glow-accent: 0 0 24px rgba(0,229,255,0.25);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

/* RTL font override */
html[dir="rtl"],
.is-rtl {
  --font-primary: 'Vazirmatn', 'Yekan Bakh', sans-serif;
  --font-secondary: 'Vazirmatn', sans-serif;
}

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

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

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

button { cursor: pointer; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.is-rtl h1, .is-rtl h2, .is-rtl h3, .is-rtl h4, .is-rtl h5, .is-rtl h6 {
  letter-spacing: 0;
}

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

ul, ol { padding-inline-start: 1.5rem; }
li { margin-bottom: 0.25rem; }

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

/* ── Utility Classes ─────────────────────────────────────────────────────────── */
.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;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

@media (min-width: 768px)  { .container { padding-inline: 2rem; } }
@media (min-width: 1024px) { .container { padding-inline: 3rem; } }

.container--wide    { max-width: 1440px; }
.container--narrow  { max-width: 960px; }
.container--tight   { max-width: 720px; }

/* Section spacing */
.section { padding-block: 5rem; }
.section--sm { padding-block: 3rem; }
.section--lg { padding-block: 7rem; }
.section--xl { padding-block: 9rem; }

@media (max-width: 767px) {
  .section { padding-block: 3rem; }
  .section--lg { padding-block: 4rem; }
  .section--xl { padding-block: 5rem; }
}

/* Text utilities */
.text-primary   { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-accent    { color: var(--text-accent); }
.text-center    { text-align: center; }
.text-start     { text-align: start; }
.text-end       { text-align: end; }

/* Gradient text */
.text-gradient {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient--warm {
  background: linear-gradient(135deg, #FF9B00 0%, #FF6B6B 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Typography Scale ────────────────────────────────────────────────────────── */
.display-1 { font-size: clamp(2.5rem, 5vw, 4.5rem); font-weight: 800; line-height: 1.1; }
.display-2 { font-size: clamp(2rem, 4vw, 3.75rem);  font-weight: 800; line-height: 1.15; }
.display-3 { font-size: clamp(1.75rem, 3vw, 3rem);  font-weight: 700; line-height: 1.2; }

.heading-1 { font-size: clamp(1.5rem, 2.5vw, 2.5rem); font-weight: 700; }
.heading-2 { font-size: clamp(1.25rem, 2vw, 2rem);    font-weight: 700; }
.heading-3 { font-size: clamp(1.125rem, 1.5vw, 1.5rem); font-weight: 600; }

.lead { font-size: 1.25rem; line-height: 1.6; color: var(--text-secondary); }
.body-lg { font-size: 1.125rem; }
.body-sm { font-size: 0.875rem; }
.caption { font-size: 0.75rem; color: var(--text-tertiary); }

/* ── Section Labels / Eyebrows ───────────────────────────────────────────────── */
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.is-rtl .section-eyebrow {
  letter-spacing: 0;
  font-size: 0.875rem;
}

.section-eyebrow::before {
  content: '';
  display: block;
  width: 2rem;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
}

/* ── Buttons ─────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 0 0 0 rgba(0,102,255,0);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,102,255,0.35);
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn--outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-2);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-light);
  background: rgba(0,102,255,0.08);
}

.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
  padding-inline: 1rem;
}

.btn--ghost:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
}

.btn--accent {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-dark) 100%);
  color: #fff;
}

.btn--accent:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,229,255,0.25);
}

.btn--sm { padding: 0.5rem 1.25rem; font-size: 0.875rem; }
.btn--lg { padding: 1rem 2.25rem; font-size: 1.0625rem; }
.btn--xl { padding: 1.125rem 2.75rem; font-size: 1.125rem; }

.btn--icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 50%;
}

/* Arrow CTA */
.btn-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-primary-light);
  transition: gap var(--transition-base);
}

.btn-arrow:hover { gap: 0.625rem; color: var(--color-primary-light); }

.btn-arrow svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-base);
}

.btn-arrow:hover svg { transform: translateX(4px); }
.is-rtl .btn-arrow:hover svg { transform: translateX(-4px); }

/* ── Cards ───────────────────────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card__media {
  aspect-ratio: 16/9;
  overflow: hidden;
}

.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card:hover .card__media img {
  transform: scale(1.05);
}

.card__body {
  padding: 1.5rem;
}

.card__label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.card__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  line-height: 1.35;
}

.card__excerpt {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

/* Glow card variant */
.card--glow:hover {
  box-shadow: var(--glow-primary), var(--shadow-xl);
  border-color: rgba(0,102,255,0.3);
}

/* Feature card */
.card--feature {
  padding: 2rem;
  background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-surface-2) 100%);
}

.card--feature .card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: rgba(0,102,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--color-accent);
}

/* ── Badges / Tags ───────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: rgba(0,102,255,0.15);
  color: var(--color-primary-light);
  border: 1px solid rgba(0,102,255,0.25);
}

.badge--accent  { background: rgba(0,229,255,0.12); color: var(--color-accent); border-color: rgba(0,229,255,0.25); }
.badge--success { background: rgba(0,200,150,0.12); color: var(--color-success); border-color: rgba(0,200,150,0.25); }
.badge--warning { background: rgba(255,155,0,0.12); color: var(--color-warning); border-color: rgba(255,155,0,0.25); }
.badge--gray    { background: rgba(255,255,255,0.06); color: var(--text-secondary); border-color: var(--border); }

/* Protocol badges */
.badge--wifi  { background: rgba(37,211,102,0.12); color: #25D366; border-color: rgba(37,211,102,0.25); }
.badge--ble   { background: rgba(0,120,212,0.12); color: #0078D4; border-color: rgba(0,120,212,0.25); }
.badge--lora  { background: rgba(255,155,0,0.12); color: var(--color-warning); border-color: rgba(255,155,0,0.25); }
.badge--mqtt  { background: rgba(148,0,211,0.12); color: #9400D3; border-color: rgba(148,0,211,0.25); }

/* ── Header ──────────────────────────────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  inset-inline: 0;
  z-index: 200;
  height: var(--header-height);
  transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.site-header.is-transparent {
  background: transparent;
  border-bottom: 1px solid transparent;
}

.site-header.is-solid {
  background: rgba(7,11,20,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 20px rgba(0,0,0,0.3);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  height: var(--header-height);
}

/* Logo */
.header__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.header__logo img,
.header__logo svg {
  height: 36px;
  width: auto;
}

/* Navigation */
.header__nav { display: flex; align-items: center; gap: 0; }

.nav__list {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.25rem;
}

.nav__item { position: relative; }

.nav__link {
  display: flex;
  align-items: center;
  gap: 0.3125rem;
  padding: 0.5rem 0.875rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}

.nav__link:hover,
.nav__item.is-active > .nav__link {
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
}

.nav__link--has-children .nav__arrow {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.nav__item:hover > .nav__link--has-children .nav__arrow {
  transform: rotate(180deg);
}

/* Header actions */
.header__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

/* ── Mega Menu ───────────────────────────────────────────────────────────────── */
.mega-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  inset-inline-start: 50%;
  transform: translateX(-50%);
  width: 640px;
  background: var(--bg-surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base);
  transform: translateX(-50%) translateY(-8px);
}

.is-rtl .mega-menu {
  transform: translateX(50%) translateY(-8px);
}

.nav__item:hover > .mega-menu,
.mega-menu:hover {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.is-rtl .nav__item:hover > .mega-menu,
.is-rtl .mega-menu:hover {
  transform: translateX(50%) translateY(0);
}

.mega-menu__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

.mega-menu__item {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  padding: 0.875rem;
  border-radius: var(--radius-lg);
  transition: background var(--transition-fast);
  text-decoration: none;
}

.mega-menu__item:hover {
  background: rgba(255,255,255,0.04);
}

.mega-menu__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: rgba(0,102,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-accent);
}

.mega-menu__title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.mega-menu__desc {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  line-height: 1.5;
}

/* ── Mobile Menu ─────────────────────────────────────────────────────────────── */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  padding: 6px;
}

.mobile-menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: all var(--transition-base);
}

.mobile-menu-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-toggle.is-open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.mobile-menu-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  position: fixed;
  inset: 0;
  top: var(--header-height);
  background: var(--bg-base);
  z-index: 199;
  padding: 2rem 1.5rem;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
}

.is-rtl .mobile-menu {
  transform: translateX(-100%);
}

.mobile-menu.is-open,
.is-rtl .mobile-menu.is-open {
  transform: translateX(0);
}

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

.mobile-nav__item {
  border-bottom: 1px solid var(--border);
}

.mobile-nav__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.mobile-nav__submenu {
  list-style: none;
  padding: 0 0 1rem 1rem;
}

.mobile-nav__submenu a {
  display: block;
  padding: 0.625rem 0;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

@media (max-width: 1023px) {
  .header__nav { display: none; }
  .mobile-menu-toggle { display: flex; }
}

/* ── Hero Section ────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-block: calc(var(--header-height) + 4rem) 5rem;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,102,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,102,255,0.05) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero__bg-gradient {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(0,102,255,0.2) 0%, transparent 60%);
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(0,102,255,0.15);
  border: 1px solid rgba(0,102,255,0.3);
  border-radius: var(--radius-full);
  padding: 0.375rem 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 1.5rem;
  letter-spacing: 0.04em;
}

.hero__title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.is-rtl .hero__title { letter-spacing: 0; }

.hero__lead {
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  line-height: 1.65;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 540px;
}

.hero__actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

.hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.hero__stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  display: block;
}

.hero__stat-label {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

/* Hero visual (right side) */
.hero__visual {
  position: relative;
  z-index: 1;
}

/* ── Stats Section ───────────────────────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

@media (min-width: 768px) {
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
}

.stat-item {
  background: var(--bg-surface);
  padding: 2rem 1.5rem;
  text-align: center;
}

.stat-item__number {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--text-primary);
  display: block;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, #fff 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item__label {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

/* ── Feature Grid ────────────────────────────────────────────────────────────── */
.features-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .features-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1280px) { .features-grid--4 { grid-template-columns: repeat(4, 1fr); } }

/* ── Tabs ────────────────────────────────────────────────────────────────────── */
.tabs__nav {
  display: flex;
  gap: 0.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.25rem;
  width: fit-content;
  flex-wrap: wrap;
}

.tab__btn {
  padding: 0.5625rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.tab__btn.is-active {
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
}

.tab__btn:hover:not(.is-active) {
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
}

.tab__panel { display: none; }
.tab__panel.is-active { display: block; }

/* ── Devices Grid ────────────────────────────────────────────────────────────── */
.devices-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.device-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
}

.device-card:hover {
  border-color: rgba(0,102,255,0.3);
  box-shadow: var(--glow-primary), var(--shadow-xl);
  transform: translateY(-6px);
}

.device-card__image {
  position: relative;
  aspect-ratio: 1;
  background: var(--bg-surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.device-card__image img {
  max-height: 200px;
  object-fit: contain;
  transition: transform var(--transition-slow);
}

.device-card:hover .device-card__image img {
  transform: scale(1.08);
}

.device-card__badges {
  position: absolute;
  top: 1rem;
  inset-inline-start: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.device-card__body { padding: 1.5rem; }

.device-card__sku {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  margin-bottom: 0.375rem;
}

.device-card__title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.device-card__protocols {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-bottom: 1rem;
}

.device-card__actions {
  display: flex;
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

/* ── Blog Cards ──────────────────────────────────────────────────────────────── */
.blog-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) { .blog-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .blog-grid { grid-template-columns: repeat(3, 1fr); } }

.blog-card__meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  margin-bottom: 0.75rem;
}

.blog-card__category {
  color: var(--color-accent);
  font-weight: 600;
}

/* ── Footer ──────────────────────────────────────────────────────────────────── */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding-top: 4rem;
}

.footer__grid {
  display: grid;
  gap: 3rem;
  grid-template-columns: 1fr;
  margin-bottom: 3rem;
}

@media (min-width: 640px)  { .footer__grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .footer__grid { grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr; } }

.footer__brand-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-block: 1rem;
}

.footer__col-title {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.is-rtl .footer__col-title { letter-spacing: 0; }

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

.footer__links li { margin-bottom: 0.75rem; }

.footer__links a {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer__links a:hover { color: var(--text-primary); }

.footer__social {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.footer__social-link {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.footer__social-link:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* Newsletter */
.newsletter-form {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.newsletter-form input {
  flex: 1;
  min-width: 200px;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-size: 0.9375rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.newsletter-form input:focus {
  border-color: var(--color-primary);
  background: rgba(0,102,255,0.08);
}

.newsletter-form input::placeholder { color: var(--text-tertiary); }

/* Footer Bottom */
.footer__bottom {
  border-top: 1px solid var(--border);
  padding-block: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer__copyright {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

.footer__legal {
  display: flex;
  gap: 1.5rem;
}

.footer__legal a {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

.footer__legal a:hover { color: var(--text-secondary); }

/* Trust badges */
.trust-badges {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}

/* ── Animations ──────────────────────────────────────────────────────────────── */
@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0,102,255,0.4); }
  50%       { box-shadow: 0 0 0 12px rgba(0,102,255,0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}

@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes counter-up {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Animate on scroll */
.aos-animate {
  animation: fade-in-up 0.6s ease both;
}

[data-aos] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].is-visible {
  opacity: 1;
  transform: translateY(0);
}

[data-aos-delay="100"] { transition-delay: 100ms; }
[data-aos-delay="200"] { transition-delay: 200ms; }
[data-aos-delay="300"] { transition-delay: 300ms; }
[data-aos-delay="400"] { transition-delay: 400ms; }
[data-aos-delay="500"] { transition-delay: 500ms; }

/* Floating animation */
.float-animation {
  animation: float 4s ease-in-out infinite;
}

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg, var(--bg-surface) 25%, var(--bg-surface-2) 50%, var(--bg-surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

/* ── IoT Platform Specific ───────────────────────────────────────────────────── */
/* Connection lines visual */
.connection-node {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 12px var(--color-accent);
  animation: pulse-glow 2s infinite;
}

/* Dashboard mockup */
.dashboard-preview {
  background: var(--bg-surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-xl);
  overflow: hidden;
  position: relative;
}

.dashboard-preview__bar {
  height: 40px;
  background: var(--bg-surface-2);
  display: flex;
  align-items: center;
  padding: 0 1rem;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.dashboard-preview__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dashboard-preview__content {
  padding: 1.5rem;
}

/* Metric card */
.metric-card {
  background: var(--bg-surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
}

.metric-card__label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-bottom: 0.375rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.metric-card__value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.metric-card__change {
  font-size: 0.8125rem;
  color: var(--color-success);
  margin-top: 0.25rem;
}

/* Protocol chip */
.protocol-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  background: var(--bg-surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.protocol-chip__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
}

/* ── Architecture Diagram ────────────────────────────────────────────────────── */
.arch-diagram {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.arch-layer {
  border: 1px solid var(--border-2);
  border-radius: var(--radius-xl);
  padding: 1.5rem 2rem;
  margin-bottom: -1px;
  position: relative;
  transition: all var(--transition-base);
}

.arch-layer:hover {
  z-index: 1;
  border-color: rgba(0,102,255,0.4);
  background: rgba(0,102,255,0.05);
}

.arch-layer__label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.arch-layer__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.arch-layer__items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ── Testimonials ────────────────────────────────────────────────────────────── */
.testimonial-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  position: relative;
}

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: 1.25rem;
  inset-inline-end: 1.5rem;
  font-size: 4rem;
  font-weight: 800;
  color: rgba(0,102,255,0.15);
  line-height: 1;
  font-family: Georgia, serif;
}

.is-rtl .testimonial-card::before { content: '„'; }

.testimonial-card__quote {
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.testimonial-card__avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.testimonial-card__name {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-primary);
}

.testimonial-card__role {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}

.rating-stars {
  display: flex;
  gap: 2px;
  margin-bottom: 1rem;
}

.rating-stars svg {
  width: 16px;
  height: 16px;
  color: var(--color-warning);
  fill: currentColor;
}

/* ── Forms ───────────────────────────────────────────────────────────────────── */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 0.9375rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0,102,255,0.15);
}

.form-control::placeholder { color: var(--text-tertiary); }

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='%2364748B' d='M2 5l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 12px;
  padding-inline-end: 2.5rem;
}

.is-rtl .form-select {
  background-position: left 1rem center;
}

/* ── Breadcrumbs ─────────────────────────────────────────────────────────────── */
.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

.breadcrumbs a { color: var(--text-tertiary); }
.breadcrumbs a:hover { color: var(--text-secondary); }

.breadcrumbs__sep {
  color: var(--text-tertiary);
  opacity: 0.5;
}

/* ── Reading Progress ────────────────────────────────────────────────────────── */
.reading-progress {
  position: fixed;
  top: 0;
  inset-inline-start: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  z-index: 300;
  transition: width 0.1s linear;
}

/* ── Table of Contents ───────────────────────────────────────────────────────── */
.toc {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  position: sticky;
  top: calc(var(--header-height) + 1.5rem);
}

.toc__title {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 1rem;
}

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

.toc__item { margin-bottom: 0.375rem; }

.toc__link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding-inline-start: 0;
  transition: all var(--transition-fast);
  display: block;
}

.toc__link:hover,
.toc__link.is-active {
  color: var(--color-accent);
  padding-inline-start: 0.5rem;
}

/* ── Lang Switcher ───────────────────────────────────────────────────────────── */
.lang-switcher { position: relative; }

.lang-switcher__trigger {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 0.75rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-switcher__trigger:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.lang-switcher__dropdown {
  position: absolute;
  top: calc(100% + 8px);
  inset-inline-start: 0;
  min-width: 140px;
  background: var(--bg-surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  padding: 0.5rem;
  list-style: none;
  margin: 0;
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 201;
}

.lang-switcher:hover .lang-switcher__dropdown,
.lang-switcher__dropdown:hover {
  opacity: 1;
  visibility: visible;
}

.lang-switcher__dropdown a {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.lang-switcher__dropdown a:hover,
.lang-switcher__dropdown a.is-active {
  background: rgba(0,102,255,0.1);
  color: var(--text-primary);
}

/* ── CTA Section ─────────────────────────────────────────────────────────────── */
.cta-section {
  position: relative;
  background: linear-gradient(135deg, rgba(0,102,255,0.15) 0%, rgba(0,229,255,0.08) 100%);
  border: 1px solid rgba(0,102,255,0.2);
  border-radius: var(--radius-2xl);
  padding: 4rem 3rem;
  text-align: center;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -60%;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(0,102,255,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section__title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 1rem;
}

.cta-section__lead {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 540px;
  margin-inline: auto;
}

.cta-section__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ── Integrations grid ───────────────────────────────────────────────────────── */
.integrations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 1rem;
}

.integration-logo {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1;
  transition: all var(--transition-fast);
  filter: grayscale(0.5) opacity(0.7);
}

.integration-logo:hover {
  filter: none;
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.integration-logo img {
  max-height: 36px;
  max-width: 100%;
  object-fit: contain;
}

/* ── Accessibility ───────────────────────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.skip-to-content {
  position: absolute;
  top: -100%;
  inset-inline-start: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  z-index: 999;
  font-weight: 600;
}

.skip-to-content:focus { top: 0; }

/* ── Print Styles ────────────────────────────────────────────────────────────── */
@media print {
  .site-header, .site-footer, .mega-menu, .mobile-menu { display: none !important; }
  body { color: #000; background: #fff; }
  a[href]::after { content: ' (' attr(href) ')'; }
}

/* ── Reduced Motion ──────────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}