/* 
 * MindNest Apps - responsive.css
 * Mobile responsive layout adapters for breakpoints: 320px, 375px, 768px, 1024px, 1440px, 1920px.
 */

/* Widescreen Displays (1920px and above) */
@media screen and (min-width: 1920px) {
  :root {
    --container-max-width: 1440px;
  }
}

/* Widescreen Containers (1440px) */
@media screen and (max-width: 1440px) {
  :root {
    --container-max-width: 1200px;
  }
}

/* Notebooks & Large Tablets (1024px) */
@media screen and (max-width: 1024px) {
  :root {
    --font-size-5xl: 3.85rem;
    --font-size-4xl: 3rem;
    --font-size-3xl: 2.25rem;
    --font-size-2xl: 1.75rem;
  }

  .section {
    padding-top: 100px;
    padding-bottom: 100px;
  }

  .principles-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .why-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .product-card {
    grid-template-columns: 1fr;
    max-width: 700px;
  }

  .product-visual {
    padding: 60px 40px;
    order: -1; /* Display graphic on top in stacked layout */
  }

  .product-content {
    padding: 48px;
  }
}

/* Tablets (768px) */
@media screen and (max-width: 768px) {
  :root {
    --font-size-5xl: 3rem;
    --font-size-4xl: 2.5rem;
    --font-size-3xl: 2rem;
    --font-size-2xl: 1.5rem;
    --font-size-xl: 1.25rem;
    --header-height: 70px;
  }

  .section {
    padding-top: 80px;
    padding-bottom: 80px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-left {
    max-width: 100%;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  /* Mobile Navigation Menu Integration */
  .menu-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    background-color: var(--color-bg);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.05);
    flex-direction: column;
    align-items: flex-start;
    padding: 100px 40px 40px 40px;
    gap: 24px;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    z-index: 1001;
  }

  .nav-actions {
    display: none; /* Hide default buttons in mobile nav bar */
  }

  /* Mobile layout inside toggle slide */
  .header.menu-open .nav-links {
    transform: translateX(0);
  }

  .header.menu-open .menu-toggle span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .header.menu-open .menu-toggle span:nth-child(2) {
    opacity: 0;
  }

  .header.menu-open .menu-toggle span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  /* Sticky overlay mask for mobile nav active state */
  .nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(11, 16, 32, 0.2);
    backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 1000;
  }

  .header.menu-open .nav-overlay {
    opacity: 1;
    visibility: visible;
  }

  /* Add download action inside mobile drawer menu */
  .nav-links::after {
    content: 'Download Focusly';
    display: block;
    width: 100%;
    text-align: center;
    padding: 12px;
    background-color: var(--color-primary);
    color: white;
    font-weight: 500;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-full);
    margin-top: 24px;
    cursor: pointer;
  }
}

/* Intermediate Mobile Screens (600px) */
@media screen and (max-width: 600px) {
  .principles-grid {
    grid-template-columns: 1fr;
  }

  .why-grid {
    grid-template-columns: 1fr;
  }
}

/* Small Screens (375px) */
@media screen and (max-width: 375px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
    --font-size-2xl: 1.35rem;
    --font-size-xl: 1.125rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .principles-grid {
    grid-template-columns: 1fr;
  }

  .why-grid {
    grid-template-columns: 1fr;
  }

  .contact-form-container {
    padding: 24px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

/* Micro Screens (320px) */
@media screen and (max-width: 320px) {
  :root {
    --font-size-5xl: 2.25rem;
    --font-size-4xl: 1.85rem;
  }

  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .product-content {
    padding: 24px;
  }
}