/* ========================================
   VPN IP Iran Landing Page Styles
   BEM Methodology + Semantic HTML5
   ======================================== */

/* ========================================
   CSS Variables (Design Tokens)
   ======================================== */
:root {
  /* Colors */
  --color-primary: #2563eb;
  --color-primary-dark: #1e40af;
  --color-primary-light: #3b82f6;
  --color-secondary: #0ea5e9;
  --color-accent: #f59e0b;

  --color-text-primary: #1e293b;
  --color-text-secondary: #475569;
  --color-text-light: #64748b;
  --color-text-white: #ffffff;

  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f8fafc;
  --color-bg-tertiary: #f1f5f9;
  --color-bg-dark: #0f172a;

  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;

  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Helvetica Neue", Arial, "Noto Sans",
    sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;

  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  --spacing-24: 6rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;

  /* Layout */
  --container-max-width: 1200px;
  --header-height: 80px;
}

/* ========================================
   Reset & Base Styles
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  direction: rtl;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

/* ========================================
   Utility Classes
   ======================================== */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--spacing-6);
}

@media (max-width: 768px) {
  .container {
    padding-inline: var(--spacing-4);
  }
}

/* ========================================
   Header Block
   ======================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  display: flex;
  align-items: center;
  backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.9);
}

.header__nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  transition: opacity var(--transition-fast);
}

.header__logo:hover {
  opacity: 0.8;
}

.header__logo-icon {
  font-size: var(--font-size-2xl);
}

.header__menu {
  display: flex;
  gap: var(--spacing-8);
}

.header__menu-link {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.header__menu-link:hover {
  color: var(--color-primary);
}

.header__menu-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  right: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-normal);
}

.header__menu-link:hover::after {
  width: 100%;
}

@media (max-width: 768px) {
  .header__menu {
    display: none;
  }
}

/* ========================================
   Main Content
   ======================================== */
.main {
  min-height: calc(100vh - var(--header-height));
}

/* ========================================
   Hero Section Block
   ======================================== */
.hero {
  padding-block: var(--spacing-20);
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-12);
  align-items: center;
}

.hero__content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.hero__title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
}

.hero__title-highlight {
  display: block;
  color: var(--color-primary);
  margin-top: var(--spacing-2);
}

.hero__description {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
}

.hero__cta {
  display: flex;
  gap: var(--spacing-4);
  margin-top: var(--spacing-4);
}

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

.hero__img {
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
}

@media (max-width: 968px) {
  .hero .container {
    grid-template-columns: 1fr;
  }

  .hero__title {
    font-size: var(--font-size-4xl);
  }

  .hero__cta {
    flex-direction: column;
  }

  .hero__image {
    order: -1;
  }
}

/* ========================================
   Button Component
   ======================================== */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.button--primary {
  background-color: var(--color-primary);
  color: var(--color-text-white);
  box-shadow: var(--shadow-md);
}

.button--primary:hover {
  background-color: var(--color-primary-dark);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.button--secondary {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.button--secondary:hover {
  background-color: var(--color-border);
}

.button--outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.button--outline:hover {
  background-color: var(--color-primary);
  color: var(--color-text-white);
}

.button--large {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--font-size-lg);
}

.button__icon {
  font-size: var(--font-size-xl);
}

@media (max-width: 768px) {
  .button {
    width: 100%;
  }
}

/* ========================================
   Section Header Component
   ======================================== */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-12);
}

.section-header--left {
  text-align: right;
  margin-bottom: var(--spacing-6);
}

.section-header__title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-4);
}

.section-header__description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin-inline: auto;
}

.section-header--left .section-header__description {
  margin-inline: 0;
}

@media (max-width: 768px) {
  .section-header__title {
    font-size: var(--font-size-3xl);
  }
}

/* ========================================
   Features Section Block
   ======================================== */
.features {
  padding-block: var(--spacing-20);
  background-color: var(--color-bg-primary);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-8);
}

@media (max-width: 968px) {
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .features__grid {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   Feature Card Component
   ======================================== */
.feature-card {
  padding: var(--spacing-8);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.feature-card__icon {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-4);
}

.feature-card__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-3);
}

.feature-card__description {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ========================================
   About Section Block
   ======================================== */
.about {
  padding-block: var(--spacing-20);
  background-color: var(--color-bg-secondary);
}

.about__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-12);
  align-items: center;
}

.about__text {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.about__description {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.about__paragraph {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.about__list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  margin-top: var(--spacing-4);
}

.about__list-item {
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
}

.about__image {
  display: flex;
  justify-content: center;
}

.about__img {
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
}

@media (max-width: 968px) {
  .about__content {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   CTA Section Block
   ======================================== */
.cta {
  padding-block: var(--spacing-20);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-text-white);
}

.cta__content {
  text-align: center;
  max-width: 800px;
  margin-inline: auto;
}

.cta__title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-4);
}

.cta__description {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-8);
  opacity: 0.95;
}

.cta__buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-4);
}

.cta .button--primary {
  background-color: var(--color-text-white);
  color: var(--color-primary);
}

.cta .button--primary:hover {
  background-color: var(--color-bg-tertiary);
}

.cta .button--outline {
  border-color: var(--color-text-white);
  color: var(--color-text-white);
}

.cta .button--outline:hover {
  background-color: var(--color-text-white);
  color: var(--color-primary);
}

@media (max-width: 768px) {
  .cta__title {
    font-size: var(--font-size-3xl);
  }

  .cta__buttons {
    flex-direction: column;
  }
}

/* ========================================
   Contact Section Block
   ======================================== */
.contact {
  padding-block: var(--spacing-20);
  background-color: var(--color-bg-primary);
}

.contact__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-8);
}

@media (max-width: 968px) {
  .contact__grid {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   Contact Card Component
   ======================================== */
.contact-card {
  padding: var(--spacing-8);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  text-align: center;
  transition: all var(--transition-normal);
}

.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.contact-card__icon {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-4);
}

.contact-card__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-3);
}

.contact-card__link {
  display: inline-block;
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
}

.contact-card__link:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

/* ========================================
   Footer Block
   ======================================== */
.footer {
  padding-block: var(--spacing-16);
  background-color: var(--color-bg-dark);
  color: var(--color-text-white);
}

.footer__content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-12);
  padding-bottom: var(--spacing-12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-white);
}

.footer__logo-icon {
  font-size: var(--font-size-2xl);
}

.footer__tagline {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  line-height: var(--line-height-relaxed);
}

.footer__nav-title,
.footer__social-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-4);
}

.footer__nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.footer__nav-link {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

.footer__nav-link:hover {
  color: var(--color-text-white);
}

.footer__social-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.footer__social-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

.footer__social-link:hover {
  color: var(--color-text-white);
}

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

.footer__copyright {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
}

.footer__hashtag-link {
  font-size: var(--font-size-sm);
  color: var(--color-primary-light);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
}

.footer__hashtag-link:hover {
  color: var(--color-primary);
}

@media (max-width: 968px) {
  .footer__content {
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--spacing-4);
    text-align: center;
  }
}

/* ========================================
   Accessibility & Performance
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles for accessibility */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}