@import url('https://fonts.googleapis.com/css2?family=Archivo:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,400&family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

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

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

  html {
    -webkit-text-size-adjust: none;
    text-size-adjust: none;
    scroll-behavior: smooth;
  }

  body {
    min-block-size: 100dvh;
    line-height: 1.6;
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;

    /* Push content below fixed header */
    padding-block-start: var(--header-height-initial);
  }

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

  input,
  button,
  textarea,
  select {
    font: inherit;
    color: inherit;
    background: none;
    border: none;
  }

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

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

@layer base {
  :root {
    /* Fonts */
    --font-heading: 'Archivo', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Spacing Scale (Density Mid) */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    /* Layout Sizes */
    --header-height-initial: 90px;
    --header-height-final: 70px;
    --max-width-content: 1200px;
    --border-radius-m: 16px;
    --border-radius-s: 10px;
    --border-radius-pill: 9999px;

    /* Colors Light Scheme Defaults */
    color-scheme: light dark;

    /* Design Tokens */
    --zinc-50: #f9f9fb;
    --zinc-100: #f4f4f5;
    --zinc-200: #e4e4e7;
    --zinc-300: #d4d4d8;
    --zinc-400: #a1a1aa;
    --zinc-500: #71717a;
    --zinc-600: #52525b;
    --zinc-700: #3f3f46;
    --zinc-800: #27272a;
    --zinc-900: #18181b;
    --zinc-950: #09090b;

    --blue-50: #f0f7ff;
    --blue-100: #e0effe;
    --blue-500: #2563eb;
    --blue-600: #1d4ed8;
    --blue-700: #1d40b0;

    --white: #ffffff;
    --black: #000000;
  }

  /* Define theme colors depending on light-dark scheme */
  :root {
    --color-bg: light-dark(var(--zinc-50), var(--zinc-950));
    --color-text: light-dark(var(--zinc-900), var(--zinc-100));
    --color-text-muted: light-dark(var(--zinc-600), var(--zinc-400));

    --color-primary: light-dark(var(--zinc-900), var(--white));
    --color-primary-hover: light-dark(var(--zinc-800), var(--zinc-200));
    --color-secondary: light-dark(var(--zinc-700), var(--zinc-300));
    --color-accent: var(--blue-500);
    --color-accent-hover: var(--blue-600);
    --color-accent-muted: light-dark(var(--blue-50), rgba(37, 99, 235, 0.15));

    --color-card-bg: light-dark(rgba(255, 255, 255, 0.75), rgba(24, 24, 27, 0.6));
    --color-card-border: light-dark(rgba(228, 228, 231, 0.8), rgba(39, 39, 42, 0.5));

    --color-nav-bg: light-dark(rgba(249, 249, 251, 0.8), rgba(9, 9, 11, 0.8));
    --color-nav-border: light-dark(rgba(228, 228, 231, 0.5), rgba(39, 39, 42, 0.4));

    --color-input-bg: light-dark(var(--white), rgba(24, 24, 27, 0.8));
    --color-input-border: light-dark(var(--zinc-200), rgba(255, 255, 255, 0.08));
    --color-input-focus: var(--blue-500);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.03);
    --shadow-glow: 0 0 30px -5px light-dark(rgba(37, 99, 235, 0.15), rgba(37, 99, 235, 0.25));

    /* Interpolation spaces */
    --in-oklab: ;
  }

  @supports (linear-gradient(in oklab, white, black)) {
    :root {
      --in-oklab: in oklab;
    }
  }

  h1,
  h2,
  h3,
  h4 {
    font-family: var(--font-heading);
    font-weight: 800;
    line-height: 1.1;
    color: var(--color-primary);
    letter-spacing: -0.02em;
  }

  h1 {
    font-size: clamp(2.5rem, 1.5rem + 5vw, 4.25rem);
    text-wrap: balance;
  }

  h2 {
    font-size: clamp(2rem, 1.25rem + 3.5vw, 2.75rem);
    text-wrap: balance;
    margin-block-end: var(--space-md);
  }

  h3 {
    font-size: clamp(1.25rem, 1.1rem + 1vw, 1.5rem);
    font-weight: 700;
    margin-block-end: var(--space-sm);
  }

  p {
    font-size: clamp(1rem, 0.95rem + 0.15vw, 1.1rem);
    margin-block-end: var(--space-lg);
    text-wrap: pretty;
    color: var(--color-text-muted);
  }

  /* Focus rings for keyboard accessibility */
  :focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
    border-radius: var(--border-radius-s);
  }
}

@layer theme {
  /* Gradient text */
  .text-gradient {
    background: linear-gradient(135deg var(--in-oklab), var(--blue-500), #7c3aed);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  /* Gradient background mesh */
  .bg-gradient-mesh {
    position: relative;
  }

  .bg-gradient-mesh::before {
    content: '';
    position: fixed;
    inset: -50%;
    z-index: -1;
    background:
      radial-gradient(circle at 15% 15%, light-dark(rgba(37, 99, 235, 0.05), rgba(37, 99, 235, 0.12)) 0%, transparent 45%),
      radial-gradient(circle at 85% 85%, light-dark(rgba(124, 58, 237, 0.05), rgba(124, 58, 237, 0.12)) 0%, transparent 45%);
    filter: blur(80px);
    pointer-events: none;
  }
}

@layer components {
  /* Container layout */
  .container {
    max-inline-size: var(--max-width-content);
    margin-inline: auto;
    padding-inline: var(--space-lg);
    width: 100%;
  }

  /* Header */
  .header-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--header-height-initial);
    background-color: var(--color-nav-bg);
    border-block-end: 1px solid var(--color-nav-border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: height 0.3s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.3s ease, border-color 0.3s ease;
    display: flex;
    align-items: center;
  }

  /* Native scroll animation support where available */
  @supports ((animation-timeline: scroll()) and (animation-range: 0% 100%)) {
    @keyframes shrink-header {
      to {
        height: var(--header-height-final);
        box-shadow: var(--shadow-sm);
        border-color: var(--color-card-border);
      }
    }

    .header-nav {
      animation: shrink-header auto linear both;
      animation-timeline: scroll(block root);
      animation-range: 0px 80px;
    }
  }

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

  /* Logo */
  .logo {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 900;
    letter-spacing: -0.03em;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-primary);
  }

  .logo-icon-svg {
    width: 24px;
    height: 24px;
    color: var(--color-accent);
    flex-shrink: 0;
  }

  /* Navigation Links */
  .nav-menu {
    display: flex;
    gap: var(--space-xl);
    align-items: center;
  }

  .nav-link {
    font-weight: 500;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    transition: color 0.2s ease;
    position: relative;
    padding-block: var(--space-xs);
  }

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

  .nav-link.active {
    color: var(--color-accent);
    font-weight: 600;
  }

  .nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-accent);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  }

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

  /* Hamburger Menu Toggle (Mobile) */
  .nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 22px;
    height: 16px;
    cursor: pointer;
    z-index: 110;
  }

  .nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-primary);
    border-radius: 2px;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  }

  /* Buttons */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--border-radius-s);
    cursor: pointer;
    transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), background-color 0.2s ease, box-shadow 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    text-align: center;
    min-block-size: 48px;
    gap: var(--space-sm);
  }

  .btn-primary {
    background-color: var(--color-accent);
    color: var(--white);
    box-shadow: var(--shadow-sm);
  }

  .btn-primary:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
  }

  .btn-secondary {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    color: var(--color-primary);
  }

  .btn-secondary:hover {
    background-color: light-dark(var(--zinc-100), var(--zinc-800));
    border-color: light-dark(var(--zinc-300), var(--zinc-700));
    transform: translateY(-2px);
  }

  /* Hero Section */
  .hero-section {
    padding-block: var(--space-3xl) var(--space-2xl);
    text-align: center;
  }

  .hero-content {
    max-inline-size: 850px;
    margin-inline: auto;
  }

  .hero-label {
    display: inline-block;
    padding: 0.35rem 0.85rem;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    background-color: var(--color-accent-muted);
    border-radius: var(--border-radius-pill);
    margin-block-end: var(--space-lg);
  }

  .hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-block-start: var(--space-xl);
    flex-wrap: wrap;
  }

  /* Glass Card */
  .glass-card {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--border-radius-m);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease, border-color 0.3s ease;
  }

  .glass-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    border-color: light-dark(rgba(37, 99, 235, 0.3), rgba(37, 99, 235, 0.2));
  }

  /* Grid Layouts */
  .grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
    margin-block: var(--space-2xl);
  }

  .grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--space-3xl);
    align-items: stretch;
    margin-block: var(--space-2xl);
  }

  @media (max-width: 600px) {
    .grid-2 {
      grid-template-columns: 1fr;
    }
  }

  /* Icon Containers */
  .service-icon,
  .tech-icon {
    width: 44px;
    height: 44px;
    background-color: var(--color-accent-muted);
    border-radius: var(--border-radius-s);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    margin-block-end: var(--space-md);
  }

  .service-icon-svg,
  .tech-icon-svg {
    width: 20px;
    height: 20px;
    stroke-width: 2px;
  }

  /* Workflow Timeline */
  .workflow-section {
    padding-block: var(--space-2xl);
  }

  .timeline {
    position: relative;
    max-width: 800px;
    margin: var(--space-2xl) auto 0 auto;
    padding-inline-start: var(--space-2xl);
  }

  .timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent), light-dark(var(--zinc-200), var(--zinc-800)));
  }

  .timeline-item {
    position: relative;
    margin-block-end: var(--space-xl);
  }

  .timeline-item::before {
    content: '';
    position: absolute;
    left: -29px;
    top: 24px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--color-bg);
    border: 3px solid var(--color-accent);
    z-index: 2;
    transition: transform 0.2s ease;
  }

  .timeline-item:hover::before {
    transform: scale(1.3);
  }

  .timeline-content {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--border-radius-m);
    padding: var(--space-lg) var(--space-xl);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
  }

  .timeline-content:hover {
    border-color: light-dark(rgba(37, 99, 235, 0.2), rgba(37, 99, 235, 0.15));
    box-shadow: var(--shadow-md);
  }

  .timeline-step {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-accent);
    text-transform: uppercase;
    margin-block-end: var(--space-xs);
    letter-spacing: 0.05em;
  }

  /* Forms & Validation Styling */
  .form-group {
    margin-block-end: var(--space-xl);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
  }

  .form-label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-primary);
    margin-block-end: var(--space-xs);
  }

  .form-input,
  .form-textarea {
    width: 100%;
    min-height: 48px;
    padding: 0.75rem 1rem;
    background-color: var(--color-input-bg);
    border: 1px solid var(--color-input-border);
    border-radius: var(--border-radius-s);
    color: var(--color-text);
    font-size: 0.95rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    box-sizing: border-box;
  }

  .form-textarea {
    min-height: 130px;
    resize: vertical;
  }

  .form-input:focus,
  .form-textarea:focus {
    outline: none;
    border-color: var(--color-input-focus);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  }

  .form-input:disabled,
  .form-textarea:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    background-color: light-dark(var(--zinc-100), var(--zinc-900));
    border-color: light-dark(var(--zinc-200), var(--zinc-800));
  }

  /* Selection Controls (Radio Group Cards) */
  .radio-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-md);
    width: 100%;
    margin-block-end: var(--space-xs);
  }

  .radio-label-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-lg);
    border: 1px solid var(--color-input-border);
    border-radius: var(--border-radius-s);
    cursor: pointer;
    transition: border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
    text-align: center;
    background-color: var(--color-input-bg);
    font-weight: 500;
    font-size: 0.9rem;
    min-height: 54px;
    position: relative;
    user-select: none;
  }

  .radio-label-card:hover {
    border-color: light-dark(var(--zinc-300), var(--zinc-700));
  }

  /* Hide raw input visually */
  .radio-input.visually-hidden {
    position: absolute;
    clip-path: inset(50%);
    overflow: hidden;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    border: 0;
  }

  /* Highlight label card on check */
  .radio-label-card:has(.radio-input:checked) {
    border-color: var(--color-accent);
    background-color: var(--color-accent-muted);
    color: var(--color-accent);
    box-shadow: var(--shadow-sm);
    font-weight: 600;
  }

  .radio-input:focus-visible + span {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
  }

  /* Helper & Error labels */
  .form-hint {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-block-start: var(--space-xs);
  }

  .form-error {
    font-size: 0.825rem;
    color: #ef4444;
    margin-block-start: var(--space-xs);
    display: none;
    align-items: center;
    gap: var(--space-xs);
    font-weight: 500;
  }

  .form-error.visible {
    display: flex;
    animation: fadeIn 0.2s ease;
  }

  .form-input.invalid,
  .form-textarea.invalid {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
  }

  /* Checkmark icon list */
  .checkmark-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
  }

  .checkmark-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
  }

  .checkmark-icon-wrapper {
    width: 20px;
    height: 20px;
    color: var(--color-accent);
    background-color: var(--color-accent-muted);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-block-start: 2px;
  }

  .checkmark-icon-svg {
    width: 12px;
    height: 12px;
    stroke-width: 3px;
  }

  /* Tech Grid */
  .tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-lg);
    margin-block-start: var(--space-2xl);
  }

  .tech-card {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--border-radius-s);
    padding: var(--space-xl) var(--space-lg);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease, box-shadow 0.3s ease;
  }

  .tech-card:hover {
    transform: translateY(-3px);
    border-color: light-dark(rgba(37, 99, 235, 0.2), rgba(37, 99, 235, 0.15));
    box-shadow: var(--shadow-md);
  }

  /* Footer */
  .footer {
    background-color: light-dark(var(--zinc-100), var(--zinc-900));
    border-block-start: 1px solid var(--color-nav-border);
    padding-block: var(--space-3xl) var(--space-xl);
    margin-block-start: var(--space-3xl);
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-3xl);
  }

  @media (max-width: 768px) {
    .footer-grid {
      grid-template-columns: 1fr;
      gap: var(--space-xl);
    }
  }

  .footer-col {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
  }

  .footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 900;
    color: var(--color-primary);
  }

  .footer-title {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
  }

  .footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
  }

  .footer-links a {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    transition: color 0.2s ease;
  }

  .footer-links a:hover {
    color: var(--color-accent);
  }

  .footer-bottom {
    margin-block-start: var(--space-2xl);
    padding-block-start: var(--space-lg);
    border-block-start: 1px solid var(--color-nav-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    flex-wrap: wrap;
    gap: var(--space-md);
  }
}

@layer utilities {
  .text-center {
    text-align: center;
  }

  .margin-block-large {
    margin-block: var(--space-3xl);
  }

  .margin-block-medium {
    margin-block: var(--space-2xl);
  }

  /* Animations */
  @keyframes fadeIn {
    from {
      opacity: 0;
      transform: translateY(12px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .animate-fade-in {
    animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
  }

  .delay-100 {
    animation-delay: 0.08s;
  }

  .delay-200 {
    animation-delay: 0.16s;
  }

  .delay-300 {
    animation-delay: 0.24s;
  }
}

/* Mobile responsive navigation styles */
@media (max-width: 768px) {
  .header-nav {
    height: var(--header-height-final);
  }

  body {
    padding-block-start: var(--header-height-final);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height-final);
    left: 0;
    right: 0;
    background-color: var(--color-nav-bg);
    border-block-end: 1px solid var(--color-nav-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--space-xl) var(--space-lg);
    gap: var(--space-lg);
    transform: translateY(-150%);
    opacity: 0;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
    pointer-events: none;
    box-shadow: var(--shadow-lg);
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  /* Hamburger open state icon rotation */
  .nav-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

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

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