/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */
:root {
    /* Colors */
    --color-primary: #667eea;
    --color-primary-dark: #5568d3;
    --color-primary-light: #8b9ef5;
    --color-secondary: #764ba2;
    
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #3b82f6;
    
    --color-text: #1f2937;
    --color-text-muted: #6b7280;
    --color-text-light: #9ca3af;
    
    --color-bg: #ffffff;
    --color-bg-alt: #f9fafb;
    --color-bg-dark: #111827;
    
    --color-border: #e5e7eb;
    --color-border-light: #f3f4f6;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 1rem;
    --font-size-sm: 0.875rem;
    --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-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: 1.75;
    
    /* 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;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;
    
    /* Container */
    --container-max-width: 1280px;
    --container-padding: var(--spacing-4);
    
    /* Z-index */
    --z-sticky: 100;
    --z-modal: 1000;
    --z-toast: 2000;
  }
  
  /* ============================================
     Base Styles & Reset
     ============================================ */
  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }
  
  html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
  
  body {
    margin: 0;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
  }
  
  img,
  picture,
  video,
  canvas,
  svg {
    display: block;
    max-width: 100%;
    height: auto;
  }
  
  button,
  input,
  textarea,
  select {
    font: inherit;
  }
  
  p,
  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    overflow-wrap: break-word;
  }
  
  /* Screen reader 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-width: 0;
  }
  
  /* ============================================
     Layout Components
     ============================================ */
  .container {
    width: 100%;
    max-width: var(--container-max-width);
    margin-inline: auto;
    padding-inline: var(--container-padding);
  }
  
  .container-fluid {
    width: 100%;
    padding-inline: var(--container-padding);
  }
  
  .section {
    padding-block: var(--spacing-20);
  }
  
  .section--alt {
    background-color: var(--color-bg-alt);
  }
  
  .section--primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
  }
  
  .section__header {
    text-align: center;
    margin-bottom: var(--spacing-12);
  }
  
  .section__title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-4xl));
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-4);
    color: inherit;
  }
  
  .section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    max-width: 48rem;
    margin-inline: auto;
  }
  
  .section--primary .section__subtitle {
    color: rgba(255, 255, 255, 0.9);
  }
  
  .section__note {
    color: var(--color-text-muted);
    margin-top: var(--spacing-2);
  }
  
  .section__actions {
    text-align: center;
    margin-top: var(--spacing-8);
  }
  
  /* ============================================
     Button Component
     ============================================ */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    line-height: 1;
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    user-select: none;
    min-height: 44px; /* Touch-friendly */
  }
  
  .btn:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
  }
  
  .btn--primary {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
  }
  
  .btn--primary:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
  }
  
  .btn--primary:active {
    transform: translateY(0);
  }
  
  .btn--light {
    background-color: white;
    color: var(--color-primary);
    border-color: white;
  }
  
  .btn--light:hover {
    background-color: var(--color-bg-alt);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
  }
  
  .btn--lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
    min-height: 52px;
  }
  
  .btn--block {
    width: 100%;
  }
  
  .btn__icon {
    flex-shrink: 0;
    transform: scaleX(-1); /* Flip for RTL */
  }
  
  /* ============================================
     Form Component
     ============================================ */
  .form {
    width: 100%;
  }
  
  .form__row {
    display: grid;
    gap: var(--spacing-4);
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
  
  .form__group {
    position: relative;
    margin-bottom: var(--spacing-4);
  }
  
  .form__label {
    display: block;
    margin-bottom: var(--spacing-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
  }
  
  .form__input {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    min-height: 44px; /* Touch-friendly */
  }
  
  .form__input::placeholder {
    color: var(--color-text-light);
  }
  
  .form__input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
  }
  
  .form__input.invalid {
    border-color: var(--color-danger);
  }
  
  .form__error {
    display: block;
    margin-top: var(--spacing-1);
    font-size: var(--font-size-sm);
    color: var(--color-danger);
    min-height: 1.25rem;
  }
  
  .form__consent {
    margin-top: var(--spacing-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-align: center;
  }
  
  .form__status {
    margin-top: var(--spacing-4);
    padding: var(--spacing-4);
    border-radius: var(--radius-md);
  }
  
  .form__status--success {
    background-color: #d1fae5;
    color: #065f46;
  }
  
  .form__status--error {
    background-color: #fee2e2;
    color: #991b1b;
  }
  
  .form__status--loading {
    background-color: #dbeafe;
    color: #1e40af;
  }
  
  /* ============================================
     Hero Section
     ============================================ */
  .hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    padding-block: var(--spacing-20);
    min-height: 70vh;
    display: flex;
    align-items: center;
  }
  
  .hero__container {
    padding-block: var(--spacing-8);
  }
  
  .hero__grid {
    display: grid;
    gap: var(--spacing-8);
    align-items: center;
  }
  
  @media (min-width: 992px) {
    .hero__grid {
      grid-template-columns: 1fr 1fr;
    }
  }
  
  .hero__content {
    order: 2;
  }
  
  @media (min-width: 992px) {
    .hero__content {
      order: 1;
    }
  }
  
  .hero__title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-4xl));
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-6);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-4);
  }
  
  .hero__logo {
    height: 1.8em;
    width: auto;
  }
  
  .hero__subtitle {
    font-size: var(--font-size-xl);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-8);
    color: rgba(255, 255, 255, 0.95);
  }
  
  .hero__actions {
    display: flex;
    gap: var(--spacing-4);
    flex-wrap: wrap;
  }
  
  .hero__form-card {
    background: rgba(255, 255, 255, 0.98);
    padding: var(--spacing-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    color: var(--color-text);
    order: 1;
  }
  
  @media (min-width: 992px) {
    .hero__form-card {
      order: 2;
    }
  }
  
  .hero__form-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-6);
    color: var(--color-text);
  }
  
  /* ============================================
     Benefits Section
     ============================================ */
  .benefits__grid {
    display: grid;
    gap: var(--spacing-6);
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
  
  .benefit-card {
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: transform var(--transition-base);
  }
  
  .benefit-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
  }
  
  .benefit-card__icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-4);
  }
  
  .benefit-card__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-3);
    color: var(--color-text);
  }
  
  .benefit-card__text {
    color: var(--color-text-muted);
    line-height: var(--line-height-relaxed);
  }
  
  /* ============================================
     Video Section
     ============================================ */
  .video-wrapper {
    max-width: 56rem;
    margin-inline: auto;
  }
  
  .video-facade {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition-base);
  }
  
  .video-facade:hover {
    transform: scale(1.02);
  }
  
  .video-facade__thumbnail {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  
  .video-facade__play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 50%;
    transition: transform var(--transition-base);
  }
  
  .video-facade:hover .video-facade__play {
    transform: translate(-50%, -50%) scale(1.1);
  }
  
  /* ============================================
     Pricing Section
     ============================================ */
  .pricing__grid {
    display: grid;
    gap: var(--spacing-8);
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    max-width: 72rem;
    margin-inline: auto;
  }
  
  .pricing-card {
    position: relative;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transition: transform var(--transition-base);
  }
  
  .pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
  }
  
  .pricing-card--featured {
    border: 3px solid var(--color-primary);
  }
  
  .pricing-card__popular {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-warning);
    color: var(--color-text);
    padding: var(--spacing-2) var(--spacing-6);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    z-index: 1;
  }
  
  .pricing-card__header {
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, white 100%);
    padding: var(--spacing-8);
    text-align: center;
  }
  
  .pricing-card--featured .pricing-card__header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    padding-top: var(--spacing-12);
  }
  
  .pricing-card__badge {
    display: inline-block;
    padding: var(--spacing-1) var(--spacing-3);
    background: var(--color-text-muted);
    color: white;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-4);
  }
  
  .pricing-card__badge--dark {
    background: var(--color-text);
  }
  
  .pricing-card__name {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-4);
  }
  
  .pricing-card__price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--spacing-2);
  }
  
  .pricing-card__amount {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
  }
  
  .pricing-card__period {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
  }
  
  .pricing-card--featured .pricing-card__period {
    color: rgba(255, 255, 255, 0.8);
  }
  
  .pricing-card__features {
    list-style: none;
    padding: var(--spacing-8);
    margin: 0;
  }
  
  .pricing-card__features li {
    padding: var(--spacing-3) 0;
    line-height: var(--line-height-relaxed);
    border-bottom: 1px solid var(--color-border-light);
  }
  
  .pricing-card__features li:last-child {
    border-bottom: none;
  }
  
  .pricing-card .btn {
    margin: 0 var(--spacing-8) var(--spacing-8);
  }
  
  .pricing__footer {
    text-align: center;
    margin-top: var(--spacing-8);
    color: var(--color-text-muted);
  }
  
  /* ============================================
     Steps Component
     ============================================ */
  .steps {
    display: grid;
    gap: var(--spacing-8);
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
  
  .step {
    text-align: center;
  }
  
  .step__number {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-4);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    border-radius: 50%;
  }
  
  .step__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-3);
    color: var(--color-text);
  }
  
  .step__text {
    color: var(--color-text-muted);
    line-height: var(--line-height-relaxed);
  }
  
  /* ============================================
     Sample Report Section
     ============================================ */
  .lead-form-wrapper {
    margin-bottom: var(--spacing-12);
  }
  
  .lead-form-card {
    max-width: 48rem;
    margin-inline: auto;
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
  }
  
  .lead-form-card__title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    text-align: center;
    margin-bottom: var(--spacing-2);
    color: var(--color-text);
  }
  
  .lead-form-card__subtitle {
    text-align: center;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-6);
  }
  
  .sample-table-wrapper {
    background: white;
    padding: var(--spacing-6);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
  }
  
  .table-container {
    overflow-x: auto;
    margin-bottom: var(--spacing-6);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
  }
  
  .tender-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
  }
  
  .tender-table th,
  .tender-table td {
    padding: var(--spacing-4);
    text-align: right;
    border-bottom: 1px solid var(--color-border-light);
  }
  
  .tender-table th {
    background: var(--color-bg-alt);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    position: sticky;
    top: 0;
    z-index: 10;
  }
  
  .tender-table tbody tr:hover {
    background: var(--color-bg-alt);
  }
  
  .badge {
    display: inline-block;
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    background: var(--color-primary);
    color: white;
  }
  
  .badge--success {
    background: var(--color-success);
  }
  
  .badge--warning {
    background: var(--color-warning);
    color: var(--color-text);
  }
  
  .info-box {
    padding: var(--spacing-6);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    border-right: 4px solid var(--color-primary);
  }
  
  /* ============================================
     Final CTA Section
     ============================================ */
  .final-cta {
    text-align: center;
  }
  
  .final-cta__content {
    max-width: 48rem;
    margin-inline: auto;
  }
  
  .final-cta__title {
    font-size: clamp(var(--font-size-2xl), 5vw, var(--font-size-4xl));
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-4);
  }
  
  .final-cta__subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-8);
    color: rgba(255, 255, 255, 0.9);
  }
  
  /* ============================================
     Sticky CTA Button
     ============================================ */
  .sticky-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    display: none;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4) var(--spacing-6);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    border: none;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    cursor: pointer;
    z-index: var(--z-sticky);
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.15);
    transition: all var(--transition-base);
  }
  
  .sticky-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 -6px 20px rgba(0, 0, 0, 0.2);
  }
  
  .sticky-cta__icon {
    transform: scaleX(-1); /* Flip for RTL */
  }
  
  @media (max-width: 768px) {
    body {
      padding-bottom: 70px;
    }
    
    .sticky-cta {
      display: flex;
    }
  }
  
  /* ============================================
     Modal Component
     ============================================ */
  .modal {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-4);
  }
  
  .modal[hidden] {
    display: none;
  }
  
  .modal__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    animation: fadeIn var(--transition-base);
  }
  
  .modal__content {
    position: relative;
    width: 100%;
    max-width: 32rem;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    animation: slideUp var(--transition-slow);
  }
  
  .modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-6);
    border-bottom: 1px solid var(--color-border-light);
  }
  
  .modal__title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin: 0;
    color: var(--color-text);
  }
  
  .modal__close {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
  }
  
  .modal__close:hover {
    background: var(--color-bg-alt);
    color: var(--color-text);
  }
  
  .modal__body {
    padding: var(--spacing-6);
  }
  
  .modal__description {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-6);
  }
  
  /* Animations */
  @keyframes fadeIn {
    from {
      opacity: 0;
    }
    to {
      opacity: 1;
    }
  }
  
  @keyframes slideUp {
    from {
      opacity: 0;
      transform: translateY(20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  /* ============================================
     Responsive Design
     ============================================ */
  @media (max-width: 768px) {
    :root {
      --spacing-20: 3rem;
    }
    
    .section {
      padding-block: var(--spacing-12);
    }
    
    .hero {
      padding-block: var(--spacing-12);
      min-height: auto;
    }
    
    .hero__title {
      font-size: var(--font-size-2xl);
    }
    
    .hero__subtitle {
      font-size: var(--font-size-base);
    }
    
    .hero__form-card {
      padding: var(--spacing-6);
    }
    
    .section__title {
      font-size: var(--font-size-2xl);
    }
    
    .tender-table {
      min-width: 600px;
    }
    
    .modal__content {
      max-height: 90vh;
      overflow-y: auto;
    }
  }
  
  @media (max-width: 576px) {
    .benefits__grid,
    .pricing__grid,
    .steps {
      grid-template-columns: 1fr;
    }
    
    .form__row {
      grid-template-columns: 1fr;
    }
  }