/* ==========================================================================
   FILIS TECHNOLOGY — Base Design System & CSS Reset
   Version: 1.0.0
   ========================================================================== */

:root {
  /* Color Palette - German Precision & Corporate Engineering */
  --color-primary: #0B132B;          /* Deep Graphite Navy */
  --color-primary-light: #1C2541;    /* Slate Dark Navy */
  --color-text: #1E293B;             /* Primary Text */
  --color-text-muted: #64748B;       /* Secondary / Subtitle Text */
  --color-text-light: #94A3B8;       /* Subtle Metadata Text */
  
  --color-accent: #0066CC;           /* FILIS Master Blue */
  --color-accent-hover: #004FA3;     /* Darker Blue on Hover */
  --color-accent-light: #EBF5FF;     /* Blue Tint for Badges */
  --color-accent-cyan: #00A3FF;      /* High-Tech Innovation Cyan */
  
  --color-bg: #FFFFFF;               /* Pure White */
  --color-bg-alt: #F8FAFC;           /* Off-White Section Background */
  --color-bg-subtle: #F1F5F9;        /* Light Grey Contrast Background */
  --color-border: #E2E8F0;           /* Clean Border */
  --color-border-subtle: #CBD5E1;    /* Focused Border */
  
  --color-card-bg: #FFFFFF;
  --color-dark-surface: #0B132B;
  --color-dark-card: #151F38;
  --color-dark-border: #243254;

  --color-success: #16A34A;
  --color-success-light: #DCFCE7;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  
  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(11, 19, 43, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(11, 19, 43, 0.08), 0 1px 2px 0 rgba(11, 19, 43, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(11, 19, 43, 0.08), 0 2px 4px -1px rgba(11, 19, 43, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(11, 19, 43, 0.08), 0 4px 6px -2px rgba(11, 19, 43, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(11, 19, 43, 0.08), 0 10px 10px -5px rgba(11, 19, 43, 0.03);
  --shadow-blue: 0 10px 25px -5px rgba(0, 102, 204, 0.25);
  
  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 350ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   CSS Reset & Safari-Safe Responsive Baseline
   ========================================================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

html, body {
  width: 100%;
  max-width: 100%;
  overflow-x: clip; /* Safari and standard safe overflow handling */
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1 0 auto;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

ul, ol {
  list-style: none;
}

/* ==========================================================================
   Typography Hierarchy
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.65rem);
  font-weight: 700;
}

h4 {
  font-size: 1.2rem;
  font-weight: 600;
}

p {
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

.lead {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--color-text-muted);
  line-height: 1.65;
}

.text-muted {
  color: var(--color-text-muted);
}

.text-sm {
  font-size: 0.875rem;
  line-height: 1.5;
}

.text-xs {
  font-size: 0.75rem;
  line-height: 1.4;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.eyebrow::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

/* ==========================================================================
   Layout Containers & Utilities
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container-narrow {
  max-width: 960px;
}

.container-wide {
  max-width: 1360px;
}

.section {
  padding-top: clamp(4rem, 8vw, 7rem);
  padding-bottom: clamp(4rem, 8vw, 7rem);
  position: relative;
}

.section-sm {
  padding-top: clamp(2.5rem, 5vw, 4rem);
  padding-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-alt {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-dark {
  background-color: var(--color-dark-surface);
  color: #FFFFFF;
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: #FFFFFF;
}

.section-dark .lead,
.section-dark .text-muted {
  color: #94A3B8;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-header--left {
  text-align: left;
  margin-left: 0;
}

.section-header h2 {
  margin-bottom: 1rem;
}

/* Grids */
.grid {
  display: grid;
  gap: 1.75rem;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid-1-2 {
  grid-template-columns: 1fr 1.5fr;
}

.grid-2-1 {
  grid-template-columns: 1.5fr 1fr;
}

/* ==========================================================================
   Buttons & Interactive Elements
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.8125rem 1.625rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  text-align: center;
  white-space: nowrap;
  line-height: 1.25;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #FFFFFF;
  border: 1px solid var(--color-accent);
  box-shadow: 0 2px 4px rgba(0, 102, 204, 0.2);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #FFFFFF;
  transform: translateY(-1px);
  box-shadow: var(--shadow-blue);
}

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

.btn-secondary:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
  color: #FFFFFF;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-border-subtle);
}

.btn-outline:hover {
  background-color: var(--color-bg-subtle);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.btn-outline-white {
  background-color: transparent;
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-outline-white:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: #FFFFFF;
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn-white {
  background-color: #FFFFFF;
  color: var(--color-primary);
  border: 1px solid #FFFFFF;
}

.btn-white:hover {
  background-color: var(--color-bg-alt);
  color: var(--color-accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-sm {
  font-size: 0.8125rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  font-size: 1.0625rem;
  padding: 0.9375rem 2rem;
  border-radius: var(--radius-md);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

/* ==========================================================================
   Badges & Micro Components
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  border: 1px solid rgba(0, 102, 204, 0.15);
}

.badge-dark {
  background-color: rgba(255, 255, 255, 0.1);
  color: #38BDF8;
  border: 1px solid rgba(56, 189, 248, 0.2);
}

.badge-success {
  background-color: var(--color-success-light);
  color: var(--color-success);
  border: 1px solid rgba(22, 163, 74, 0.2);
}

.badge-neutral {
  background-color: var(--color-bg-subtle);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

/* Trust Bar */
.trust-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}

.trust-item svg {
  width: 18px;
  height: 18px;
  color: var(--color-accent);
  flex-shrink: 0;
}

/* Cards */
.card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.card:hover {
  border-color: var(--color-border-subtle);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.card-dark {
  background-color: var(--color-dark-card);
  border-color: var(--color-dark-border);
  color: #FFFFFF;
}

.card-dark:hover {
  border-color: var(--color-accent);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

/* Feature Item Lists */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  margin: 1.25rem 0;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9375rem;
  color: var(--color-text);
}

.feature-item svg {
  width: 18px;
  height: 18px;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 0.2rem;
}

/* ==========================================================================
   Micro Animations & Accessibility
   ========================================================================== */

.fade-in-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .fade-in-up {
    opacity: 1 !important;
    transform: none !important;
  }
}