/* ==========================================================================
   CSS DIRECTIVES & RESET
   ========================================================================== */

@layer reset, base, theme, layout, components, utilities;

@layer reset {
  *, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

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

  body {
    min-height: 100dvh;
    text-rendering: optimizeSpeed;
    line-height: 1.5;
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    overflow-x: hidden;
  }

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

  input, button, textarea, select {
    font: inherit;
  }

  button {
    background: none;
    border: none;
    cursor: pointer;
  }

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

  ul, ol {
    list-style: none;
  }
}

/* ==========================================================================
   DESIGN TOKENS & THEMING (light-dark)
   ========================================================================== */

@layer theme {
  :root {
    color-scheme: light dark;

    /* Palette - Azzurro Acceso, Arancione/Oro, WhatsApp Green */
    --color-primary-hue: 205;
    --color-secondary-hue: 28;
    
    /* Light Mode Tokens */
    --clr-primary-light: hsl(var(--color-primary-hue), 100%, 45%);
    --clr-primary-hover-light: hsl(var(--color-primary-hue), 100%, 38%);
    --clr-primary-bg-light: hsl(var(--color-primary-hue), 100%, 96%);
    
    --clr-secondary-light: hsl(var(--color-secondary-hue), 100%, 50%);
    --clr-secondary-hover-light: hsl(var(--color-secondary-hue), 100%, 42%);
    --clr-secondary-bg-light: hsl(var(--color-secondary-hue), 100%, 95%);
    
    --clr-whatsapp: hsl(142, 70%, 45%);
    --clr-whatsapp-hover: hsl(142, 70%, 38%);
    
    --clr-bg-light: hsl(210, 20%, 98%);
    --clr-surface-light: hsl(0, 0%, 100%);
    --clr-surface-alt-light: hsl(210, 15%, 94%);
    --clr-text-light: hsl(210, 30%, 15%);
    --clr-text-muted-light: hsl(210, 15%, 45%);
    --clr-border-light: hsl(210, 15%, 88%);
    --clr-shadow-light: rgba(0, 0, 0, 0.06);
    --clr-shadow-focus-light: rgba(0, 119, 255, 0.25);

    /* Dark Mode Tokens */
    --clr-primary-dark: hsl(var(--color-primary-hue), 100%, 55%);
    --clr-primary-hover-dark: hsl(var(--color-primary-hue), 100%, 62%);
    --clr-primary-bg-dark: hsl(var(--color-primary-hue), 30%, 12%);
    
    --clr-secondary-dark: hsl(var(--color-secondary-hue), 100%, 55%);
    --clr-secondary-hover-dark: hsl(var(--color-secondary-hue), 100%, 63%);
    --clr-secondary-bg-dark: hsl(var(--color-secondary-hue), 30%, 14%);
    
    --clr-bg-dark: hsl(210, 20%, 8%);
    --clr-surface-dark: hsl(210, 20%, 12%);
    --clr-surface-alt-dark: hsl(210, 18%, 16%);
    --clr-text-dark: hsl(210, 15%, 90%);
    --clr-text-muted-dark: hsl(210, 10%, 65%);
    --clr-border-dark: hsl(210, 15%, 20%);
    --clr-shadow-dark: rgba(0, 0, 0, 0.35);
    --clr-shadow-focus-dark: rgba(0, 162, 255, 0.35);

    /* Semantic Mappings */
    --clr-primary: light-dark(var(--clr-primary-light), var(--clr-primary-dark));
    --clr-primary-hover: light-dark(var(--clr-primary-hover-light), var(--clr-primary-hover-dark));
    --clr-primary-bg: light-dark(var(--clr-primary-bg-light), var(--clr-primary-bg-dark));
    
    --clr-secondary: light-dark(var(--clr-secondary-light), var(--clr-secondary-dark));
    --clr-secondary-hover: light-dark(var(--clr-secondary-hover-light), var(--clr-secondary-hover-dark));
    --clr-secondary-bg: light-dark(var(--clr-secondary-bg-light), var(--clr-secondary-bg-dark));
    
    --clr-bg: light-dark(var(--clr-bg-light), var(--clr-bg-dark));
    --clr-surface: light-dark(var(--clr-surface-light), var(--clr-surface-dark));
    --clr-surface-alt: light-dark(var(--clr-surface-alt-light), var(--clr-surface-alt-dark));
    --clr-text: light-dark(var(--clr-text-light), var(--clr-text-dark));
    --clr-text-muted: light-dark(var(--clr-text-muted-light), var(--clr-text-muted-dark));
    --clr-border: light-dark(var(--clr-border-light), var(--clr-border-dark));
    --clr-shadow: light-dark(var(--clr-shadow-light), var(--clr-shadow-dark));
    --clr-shadow-focus: light-dark(var(--clr-shadow-focus-light), var(--clr-shadow-focus-dark));

    /* Layout & Sizing Tokens */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    --header-height: 90px;
    --header-height-shrunk: 65px;
    --container-max-w: 1200px;
  }
}

/* ==========================================================================
   BASE STYLES & TYPOGRAPHY
   ========================================================================== */

@layer base {
  body {
    background-color: var(--clr-bg);
    color: var(--clr-text);
    font-size: 1rem;
    transition: background-color var(--transition-fast), color var(--transition-fast);
  }

  h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    color: var(--clr-text);
    font-weight: 700;
    line-height: 1.25;
    text-wrap: balance;
  }

  h1 {
    font-size: clamp(2.25rem, 1.25rem + 4vw, 4rem);
    margin-bottom: 1rem;
  }

  h2 {
    font-size: clamp(1.8rem, 1.2rem + 2.5vw, 2.75rem);
    margin-bottom: 1rem;
    text-align: center;
    position: relative;
    padding-bottom: 12px;
  }

  h2::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--clr-primary);
    border-radius: 2px;
  }

  h3 {
    font-size: clamp(1.3rem, 1rem + 1vw, 1.6rem);
    margin-bottom: 0.75rem;
  }

  p {
    font-size: clamp(1rem, 0.95rem + 0.2vw, 1.1rem);
    color: var(--clr-text-muted);
    text-wrap: pretty;
    margin-bottom: 1.5rem;
  }

  /* Focus Indicator */
  :focus-visible {
    outline: 3px solid var(--clr-primary);
    outline-offset: 4px;
  }

  /* Selection styling */
  ::selection {
    background-color: var(--clr-primary);
    color: #ffffff;
  }
}

/* ==========================================================================
   LAYOUT STRUCTURE
   ========================================================================== */

@layer layout {
  .container {
    width: 100%;
    max-width: var(--container-max-w);
    margin-inline: auto;
    padding-inline: 1.5rem;
  }

  section {
    padding-block: clamp(4rem, 2rem + 6vw, 7.5rem);
    content-visibility: auto;
    contain-intrinsic-block-size: auto 600px;
  }

  section:nth-of-type(even) {
    background-color: var(--clr-surface-alt);
  }

  .grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    align-items: center;
  }

  .grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
  }

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

/* ==========================================================================
   COMPONENTS
   ========================================================================== */

@layer components {
  /* Buttons */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.875rem 1.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: transform var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
    text-align: center;
    font-size: 1rem;
    box-shadow: 0 4px 6px var(--clr-shadow);
  }

  .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px var(--clr-shadow);
  }

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

  .btn-primary {
    background-color: var(--clr-primary);
    color: #ffffff;
  }

  .btn-primary:hover {
    background-color: var(--clr-primary-hover);
  }

  .btn-secondary {
    background-color: var(--clr-secondary);
    color: #ffffff;
  }

  .btn-secondary:hover {
    background-color: var(--clr-secondary-hover);
  }

  .btn-whatsapp {
    background-color: var(--clr-whatsapp);
    color: #ffffff;
  }

  .btn-whatsapp:hover {
    background-color: var(--clr-whatsapp-hover);
  }

  .btn-outline {
    background-color: transparent;
    color: var(--clr-primary);
    border: 2px solid var(--clr-primary);
    box-shadow: none;
  }

  .btn-outline:hover {
    background-color: var(--clr-primary-bg);
  }

  /* Cards */
  .card {
    background-color: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: 0 10px 20px var(--clr-shadow);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
  }

  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px var(--clr-shadow);
    border-color: var(--clr-primary);
  }

  /* Sticky Shrinking Header */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: rgba(light-dark(#ffffff, #0a0e14), 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--clr-border);
    z-index: 1000;
    display: flex;
    align-items: center;
    transition: height var(--transition-normal), background-color var(--transition-normal);
  }

  /* Scroll-driven shrinking header layout (Native CSS) */
  @supports ((animation-timeline: scroll()) and (animation-range: 0% 100%)) {
    .site-header {
      animation: shrink-header auto linear both;
      animation-timeline: scroll(block root);
      animation-range: 0px 100px;
    }

    @keyframes shrink-header {
      to {
        height: var(--header-height-shrunk);
        background-color: rgba(light-dark(#ffffff, #080c10), 0.95);
        box-shadow: 0 4px 20px var(--clr-shadow);
      }
    }
  }

  /* Fallback class for browsers without scroll-driven animation support */
  .site-header.js-shrunk {
    height: var(--header-height-shrunk);
    background-color: rgba(light-dark(#ffffff, #080c10), 0.95);
    box-shadow: 0 4px 20px var(--clr-shadow);
  }

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

  .logo {
    display: flex;
    flex-direction: column;
  }

  .logo-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--clr-primary);
    line-height: 1.1;
  }

  .logo-subtitle {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--clr-text-muted);
    font-weight: 600;
  }

  .nav-menu {
    display: none;
  }

  .nav-link {
    font-weight: 600;
    color: var(--clr-text);
    transition: color var(--transition-fast);
    position: relative;
    padding-block: 0.5rem;
  }

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

  .nav-link::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--clr-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-fast);
  }

  .nav-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
  }

  .nav-cta {
    display: none;
  }

  /* Hamburger Menu Toggle */
  .menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    z-index: 1001;
  }

  .menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--clr-text);
    border-radius: 2px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
  }

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

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

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

  /* Mobile Drawer */
  .mobile-drawer {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(300px, 85vw);
    height: 100dvh;
    background-color: var(--clr-surface);
    box-shadow: -10px 0 30px var(--clr-shadow);
    padding: 6rem 2rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    z-index: 999;
    transition: right var(--transition-normal);
  }

  .mobile-drawer.active {
    right: 0;
  }

  .drawer-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.4);
    opacity: 0;
    pointer-events: none;
    z-index: 998;
    transition: opacity var(--transition-normal);
  }

  .drawer-overlay.active {
    opacity: 1;
    pointer-events: auto;
  }

  @media (min-width: 992px) {
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 2rem;
    }
    
    .nav-cta {
      display: inline-flex;
    }

    .menu-toggle {
      display: none;
    }
  }

  /* Hero Section */
  .hero-section {
    position: relative;
    padding-top: calc(var(--header-height) + 2rem);
    min-height: clamp(550px, 80dvh, 850px);
    display: flex;
    align-items: center;
    overflow: hidden;
    content-visibility: auto;
    contain-intrinsic-block-size: auto 700px;
  }

  .hero-bg {
    position: absolute;
    inset: 0;
    z-index: -2;
    background: linear-gradient(135deg, rgba(light-dark(#f0f7ff, #0a111a), 0.9) 0%, rgba(light-dark(#ffffff, #05080c), 0.95) 100%);
  }

  .hero-image-bg {
    position: absolute;
    inset: 0;
    z-index: -3;
    opacity: 0.15;
  }

  .hero-image-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
  }

  .hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
  }

  @media (min-width: 992px) {
    .hero-grid {
      grid-template-columns: 1.2fr 0.8fr;
    }
  }

  .hero-content {
    text-align: left;
  }

  .badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.85rem;
    background-color: var(--clr-primary-bg);
    color: var(--clr-primary);
    border: 1px solid rgba(var(--clr-primary), 0.1);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.25rem;
  }

  .hero-subtitle {
    font-size: clamp(1.1rem, 1rem + 0.4vw, 1.35rem);
    margin-bottom: 2rem;
    max-width: 650px;
    line-height: 1.6;
  }

  .hero-ctas {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
  }

  .hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    border-top: 1px solid var(--clr-border);
    padding-top: 1.5rem;
  }

  .hero-badge-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--clr-text-muted);
    font-weight: 600;
  }

  .hero-badge-item svg {
    color: var(--clr-primary);
    width: 18px;
    height: 18px;
  }

  .hero-visual {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 18px 38px rgba(15, 38, 59, 0.18);
    aspect-ratio: 3 / 2;
    background-color: #18232d;
  }

  .hero-visual picture {
    display: block;
    width: 100%;
    height: 100%;
  }

  .hero-visual img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform var(--transition-slow);
  }

  .hero-visual:hover img {
    transform: scale(1.025);
  }

  @media (prefers-reduced-motion: reduce) {
    .hero-visual img {
      transition: none;
    }

    .hero-visual:hover img {
      transform: none;
    }
  }

  /* Services Grid Filter Tabs */
  .filter-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
  }

  .tab-btn {
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    background-color: var(--clr-surface-alt);
    border: 1px solid var(--clr-border);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--clr-text-muted);
    transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  }

  .tab-btn:hover {
    background-color: var(--clr-border);
    color: var(--clr-text);
  }

  .tab-btn.active {
    background-color: var(--clr-primary);
    color: #ffffff;
    border-color: var(--clr-primary);
  }

  .services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
  }

  .service-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 0;
    overflow: hidden;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
  }

  .service-card-image {
    width: 100%;
    height: 180px;
    overflow: hidden;
    position: relative;
    border-bottom: 1px solid var(--clr-border);
  }

  .service-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
  }

  .service-card:hover .service-card-image img {
    transform: scale(1.05);
  }

  .service-card-body {
    padding: 1.5rem 2rem 2rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
  }

  .service-icon-wrapper {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-sm);
    background-color: var(--clr-primary-bg);
    color: var(--clr-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
  }

  .service-icon-wrapper svg {
    width: 26px;
    height: 26px;
  }

  .service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--clr-text);
  }

  .service-list {
    margin-top: auto;
    border-top: 1px solid var(--clr-border);
    padding-top: 1rem;
  }

  .service-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--clr-text-muted);
    margin-bottom: 0.5rem;
  }

  .service-item svg {
    flex-shrink: 0;
    color: var(--clr-secondary);
    width: 14px;
    height: 14px;
    margin-top: 0.25rem;
  }

  /* Why Choose Us Section */
  .why-us-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3.5rem;
  }

  .why-us-card {
    text-align: center;
    padding: 2rem;
  }

  .why-us-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--clr-secondary-bg);
    color: var(--clr-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
  }

  .why-us-icon svg {
    width: 28px;
    height: 28px;
  }

  .why-us-card h3 {
    margin-bottom: 0.75rem;
  }

  .why-us-card p {
    font-size: 0.95rem;
    margin-bottom: 0;
  }

  /* Zone Servite (SEO Local) */
  .zones-wrapper {
    text-align: center;
    max-width: 800px;
    margin: 3rem auto 0;
  }

  .zones-lead {
    font-size: 1.15rem;
    line-height: 1.6;
    margin-bottom: 2rem;
  }

  .zones-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
  }

  .zone-tag {
    padding: 0.5rem 1rem;
    background-color: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--clr-text);
    box-shadow: 0 2px 4px var(--clr-shadow);
    transition: transform var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
  }

  .zone-tag:hover {
    transform: scale(1.05);
    border-color: var(--clr-primary);
    background-color: var(--clr-primary-bg);
    color: var(--clr-primary);
  }

  /* Chi Siamo */
  .about-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .about-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 40px var(--clr-shadow);
    aspect-ratio: 16 / 10;
  }

  .about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  /* Contact Section */
  .contacts-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: start;
  }

  @media (min-width: 992px) {
    .contacts-grid {
      grid-template-columns: 1fr 1.2fr;
    }
  }

  .contact-info-card {
    display: flex;
    flex-direction: column;
    gap: 2rem;
  }

  .contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
  }

  .contact-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background-color: var(--clr-primary-bg);
    color: var(--clr-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }

  .contact-icon svg {
    width: 22px;
    height: 22px;
  }

  .contact-text h4 {
    font-size: 1.05rem;
    margin-bottom: 0.25rem;
  }

  .contact-text p {
    font-size: 0.95rem;
    margin-bottom: 0;
  }

  .contact-text a {
    color: var(--clr-primary);
    font-weight: 600;
    transition: color var(--transition-fast);
  }

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

  .map-placeholder {
    width: 100%;
    height: 220px;
    background-color: var(--clr-surface-alt);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
  }

  .map-placeholder iframe {
    width: 100%;
    height: 100%;
    border: none;
  }

  /* Form Styling */
  .contact-form-wrapper h3 {
    margin-bottom: 1.5rem;
  }

  .form-group-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  @media (min-width: 600px) {
    .form-group-row {
      grid-template-columns: 1fr 1fr;
    }
  }

  .form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
  }

  .form-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--clr-text);
  }

  .form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-sm);
    background-color: var(--clr-surface);
    color: var(--clr-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  }

  .form-control:focus {
    outline: none;
    border-color: var(--clr-primary);
    box-shadow: 0 0 0 4px var(--clr-shadow-focus);
  }

  /* Custom validation using standard pseudo-classes */
  .form-control:user-invalid {
    border-color: #ef4444;
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.15);
  }

  .form-control:user-valid {
    border-color: #10b981;
  }

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

  .form-submit-btn {
    width: 100%;
    margin-top: 1rem;
  }

  .form-status {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    display: none;
  }

  .form-status.success {
    display: block;
    background-color: rgba(16, 185, 129, 0.15);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.3);
  }

  .form-status.error {
    display: block;
    background-color: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
  }

  /* Floating WhatsApp Button */
  .whatsapp-floating {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    background-color: var(--clr-whatsapp);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 25px rgba(37, 211, 102, 0.4);
    z-index: 999;
    transition: transform var(--transition-fast), background-color var(--transition-fast);
  }

  .whatsapp-floating:hover {
    transform: scale(1.1);
    background-color: var(--clr-whatsapp-hover);
  }

  .whatsapp-floating svg {
    width: 32px;
    height: 32px;
  }

  /* WhatsApp pulse glow animation */
  .whatsapp-floating::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 2px solid var(--clr-whatsapp);
    animation: whatsapp-pulse 2s infinite ease-out;
    opacity: 0.7;
    z-index: -1;
  }

  @keyframes whatsapp-pulse {
    0% {
      transform: scale(1);
      opacity: 0.7;
    }
    100% {
      transform: scale(1.6);
      opacity: 0;
    }
  }

  /* Footer */
  .site-footer {
    background-color: light-dark(#111827, #030712);
    color: #f3f4f6;
    padding-block: 4rem 2rem;
    border-top: 1px solid var(--clr-border);
  }

  .site-footer p {
    color: #9ca3af;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    margin-bottom: 3rem;
  }

  @media (min-width: 768px) {
    .footer-grid {
      grid-template-columns: 1.5fr 1fr 1fr;
    }
  }

  .footer-col h4 {
    color: #ffffff;
    font-size: 1.15rem;
    margin-bottom: 1.25rem;
  }

  .footer-col p {
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
  }

  .footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }

  .footer-links a {
    color: #9ca3af;
    font-size: 0.95rem;
    transition: color var(--transition-fast), padding-left var(--transition-fast);
  }

  .footer-links a:hover {
    color: var(--clr-primary-dark);
    padding-left: 5px;
  }

  .footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 2rem;
    text-align: center;
    font-size: 0.85rem;
    color: #9ca3af;
  }

  /* Gallery Grid Component */
  .gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
  }

  .gallery-item {
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 1 / 1;
    box-shadow: 0 8px 16px var(--clr-shadow);
    border: 3px solid var(--clr-surface);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
  }

  .gallery-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px var(--clr-shadow);
    border-color: var(--clr-primary);
  }

  .gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
}

/* ==========================================================================
   UTILITIES
   ========================================================================== */

@layer utilities {
  .text-center { text-align: center; }
  .text-primary { color: var(--clr-primary); }
  .text-secondary { color: var(--clr-secondary); }
  
  .mt-1 { margin-top: 0.5rem; }
  .mt-2 { margin-top: 1rem; }
  .mt-4 { margin-top: 2rem; }
  
  .mb-1 { margin-bottom: 0.5rem; }
  .mb-2 { margin-bottom: 1rem; }
  .mb-4 { margin-bottom: 2rem; }

  /* Accessibility styling for screen readers only */
  .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;
  }
}