/* ==========================================================================
   BASE.CSS - Design Tokens, Reset & Typography
   Future Software Solutions
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Colors - Warm & Approachable Palette */
  --color-primary: #D4652F;
  --color-primary-hover: #B8541F;
  --color-primary-light: #F7E8E0;

  --color-secondary: #2B5B4F;
  --color-secondary-light: #E8F0ED;

  --color-accent: #C4963A;
  --color-accent-light: #FBF6EC;

  /* Backgrounds */
  --color-bg: #FDFBF8;
  --color-bg-warm: #FAF6F1;
  --color-bg-card: #FFFFFF;
  --color-bg-footer: #2D2926;

  /* Text */
  --color-text: #2D2926;
  --color-text-muted: #6B635B;
  --color-text-light: #9B928A;
  --color-text-inverse: #FDFBF8;

  /* Borders & Shadows */
  --color-border: #E8E4DE;
  --color-border-dark: #D4CFC7;
  --shadow-sm: 0 1px 3px rgba(45, 41, 38, 0.06);
  --shadow-md: 0 4px 12px rgba(45, 41, 38, 0.08);
  --shadow-lg: 0 8px 30px rgba(45, 41, 38, 0.12);
  --shadow-card: 0 2px 8px rgba(45, 41, 38, 0.06), 0 1px 2px rgba(45, 41, 38, 0.04);

  /* Typography */
  --font-display: 'Fraunces', 'Georgia', serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Consolas', monospace;

  /* Font Sizes - Fluid Typography */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --text-sm: clamp(0.8125rem, 0.775rem + 0.2vw, 0.875rem);
  --text-base: clamp(0.9375rem, 0.9rem + 0.2vw, 1rem);
  --text-lg: clamp(1.0625rem, 1rem + 0.3vw, 1.125rem);
  --text-xl: clamp(1.1875rem, 1.1rem + 0.5vw, 1.3125rem);
  --text-2xl: clamp(1.375rem, 1.2rem + 0.9vw, 1.625rem);
  --text-3xl: clamp(1.625rem, 1.4rem + 1.2vw, 2rem);
  --text-4xl: clamp(2rem, 1.6rem + 2vw, 2.75rem);
  --text-5xl: clamp(2.5rem, 2rem + 2.5vw, 3.5rem);

  /* Line Heights */
  --leading-tight: 1.2;
  --leading-snug: 1.35;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  /* Font Weights */
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --container-max: 1140px;
  --container-wide: 1280px;
  --container-narrow: 720px;
  --gutter: clamp(1rem, 3vw, 2rem);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Z-Index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-toast: 400;
}

/* --------------------------------------------------------------------------
   Modern CSS Reset
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

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

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

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

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-normal);
  line-height: var(--leading-tight);
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

/* Remove animations for users who prefer reduced motion */
@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;
  }
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
.font-display {
  font-family: var(--font-display);
}

.font-body {
  font-family: var(--font-body);
}

.font-mono {
  font-family: var(--font-mono);
}

/* Headings */
h1, .h1 {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: var(--weight-normal);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

h2, .h2 {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: var(--weight-normal);
  letter-spacing: -0.015em;
}

h3, .h3 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: var(--weight-normal);
  letter-spacing: -0.01em;
}

h4, .h4 {
  font-family: var(--font-body);
  font-size: var(--text-2xl);
  font-weight: var(--weight-semibold);
}

h5, .h5 {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
}

h6, .h6 {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
}

/* Body Text */
.text-lg {
  font-size: var(--text-lg);
}

.text-sm {
  font-size: var(--text-sm);
}

.text-xs {
  font-size: var(--text-xs);
}

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

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

/* Links */
.link {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}

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

/* Lead Paragraph */
.lead {
  font-size: var(--text-xl);
  line-height: var(--leading-relaxed);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */

/* Visually Hidden (Accessible) */
.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;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container-wide {
  max-width: var(--container-wide);
}

.container-narrow {
  max-width: var(--container-narrow);
}

/* Section Spacing */
.section {
  padding-block: var(--space-16);
}

.section-lg {
  padding-block: var(--space-24);
}

/* Text Alignment */
.text-center {
  text-align: center;
}

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

.text-right {
  text-align: right;
}

/* Flex Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Margin Utilities */
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }

.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }