/* ============================================
   BASE CSS - Modern Renovation Firm
   Palette: Crisp whites, warm concrete, wood tones
   ============================================ */

/* ============================================
   1. VARIABLES
   ============================================ */
:root {
  /* Colors - Warm, sophisticated palette */
  --color-background: #FAFAF8;
  --color-background-alt: #FFFFFF;
  --color-surface: #F5F5F4;
  
  --color-text: #292524;
  --color-text-secondary: #57534E;
  --color-text-muted: #78716C;
  
  /* Primary - Natural wood tones (amber/brown family) */
  --color-primary: #92400E;
  --color-primary-hover: #78350F;
  --color-primary-light: #FEF3C7;
  --color-primary-contrast: #FFFFFF;
  
  /* Semantic - Harmonized with warm palette */
  --color-success: #15803D;
  --color-success-light: #DCFCE7;
  --color-warning: #B45309;
  --color-warning-light: #FEF3C7;
  --color-danger: #B91C1C;
  --color-danger-light: #FEE2E2;
  
  /* Neutral Grays - Warm concrete tones */
  --color-gray-50: #FAFAF9;
  --color-gray-100: #F5F5F4;
  --color-gray-200: #E7E5E4;
  --color-gray-300: #D6D3D1;
  --color-gray-400: #A8A29E;
  --color-gray-500: #78716C;
  --color-gray-600: #57534E;
  --color-gray-700: #44403C;
  --color-gray-800: #292524;
  --color-gray-900: #1C1917;
  
  /* Typography - Optimized for Polish diacritics */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
  --font-serif: 'Merriweather', 'Georgia', 'Cambria', 'Times New Roman', Times, serif;
  
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  
  --line-height-tight: 1.25;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;
  
  /* Spacing Scale 0-96px */
  --space-0: 0;
  --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;
  
  /* Radius - Refined contemporary */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Shadows - Soft, sophisticated */
  --shadow-sm: 0 1px 2px 0 rgb(41 37 36 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(41 37 36 / 0.08), 0 2px 4px -2px rgb(41 37 36 / 0.06);
  --shadow-lg: 0 10px 15px -3px rgb(41 37 36 / 0.08), 0 4px 6px -4px rgb(41 37 36 / 0.06);
  --shadow-xl: 0 20px 25px -5px rgb(41 37 36 / 0.1), 0 8px 10px -6px rgb(41 37 36 / 0.08);
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout */
  --container-max: 1280px;
  --container-padding: var(--space-4);
}

/* ============================================
   2. RESET & NORMALIZE
   ============================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

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;
}

ul,
ol {
  list-style: none;
}

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

/* ============================================
   3. BASE STYLES
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--color-gray-900);
  letter-spacing: -0.025em;
}

h1 { font-size: var(--text-4xl); margin-bottom: var(--space-6); }
h2 { font-size: var(--text-3xl); margin-bottom: var(--space-5); }
h3 { font-size: var(--text-2xl); margin-bottom: var(--space-4); }
h4 { font-size: var(--text-xl); margin-bottom: var(--space-3); }
h5 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
h6 { font-size: var(--text-base); margin-bottom: var(--space-2); text-transform: uppercase; letter-spacing: 0.05em; }

p {
  margin-bottom: var(--space-4);
  }

a {
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-hover);
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Polish text optimization */
body {
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
  text-rendering: optimizeLegibility;
}

/* ============================================
   4. UTILITIES
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

@media (min-width: 640px) {
  :root { --container-padding: var(--space-6); }
}

@media (min-width: 1024px) {
  :root { --container-padding: var(--space-8); }
}

/* Flex helpers */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* Grid helpers */
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* 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: 0;
}

/* ============================================
   5. COMPONENTS
   ============================================ */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: 500;
  line-height: 1.5;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: all var(--transition-base);
  cursor: pointer;
}

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

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-primary-contrast);
  border-color: var(--color-primary);
}

.btn--primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: var(--color-primary-contrast);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-gray-300);
}

.btn--secondary:hover:not(:disabled) {
  background-color: var(--color-gray-50);
  border-color: var(--color-gray-400);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-text);
}

.btn--ghost:hover:not(:disabled) {
  background-color: var(--color-gray-100);
}

/* Inputs */
.input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-background-alt);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.input:hover {
  border-color: var(--color-gray-400);
}

.input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgb(146 64 14 / 0.1);
}

.input:disabled {
  background-color: var(--color-gray-100);
  color: var(--color-text-muted);
  cursor: not-allowed;
}

/* Cards - For project galleries */
.card {
  background-color: var(--color-background-alt);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  border: 1px solid var(--color-gray-200);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card__content {
  padding: var(--space-6);
}

.card__image {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

/* Focus visible for interactive elements */
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Selection color */
::selection {
  background-color: var(--color-primary-light);
  color: var(--color-primary-hover);
}