/**
 * Base CSS
 * Premium Cookware E-commerce Platform
 * Warm, Artisanal, Sophisticated Design System
 */

/* ========================================
   VARIABLES
   ======================================== */

:root {
  /* Color Palette - Warm & Artisanal */
  --color-bg: #FAF9F6;              /* Warm white */
  --color-bg-secondary: #F5F1E8;    /* Soft beige */
  --color-bg-tertiary: #EDE8D0;     /* Cream */
  
  --color-text: #2C2C2C;            /* Muted charcoal */
  --color-text-secondary: #5C5C5C;  /* Softer charcoal */
  --color-text-muted: #8A8A8A;      /* Light gray */
  
  --color-primary: #8B956D;         /* Gentle olive */
  --color-primary-hover: #7A8460;   /* Darker olive */
  --color-primary-light: #E8EBE3;   /* Light olive tint */
  
  --color-accent: #C0C0C0;          /* Stainless steel silver */
  --color-accent-warm: #B8B0A8;     /* Warm silver */
  
  --color-success: #6B8E6B;         /* Muted sage */
  --color-warning: #D4A373;         /* Warm amber */
  --color-danger: #B85C5C;          /* Muted burgundy */
  
  /* Neutral Scale */
  --color-white: #FFFFFF;
  --color-gray-100: #F5F5F0;
  --color-gray-200: #E8E6E1;
  --color-gray-300: #D4D0C8;
  --color-gray-400: #A8A39D;
  --color-gray-500: #6B6B6B;
  --color-gray-600: #4A4A4A;
  --color-gray-700: #2C2C2C;
  
  /* Typography - Sophisticated Pairing */
  --font-serif: 'Cormorant Garamond', 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  
  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 1.875rem;  /* 30px */
  --text-4xl: 2.25rem;   /* 36px */
  --text-5xl: 3rem;      /* 48px */
  --text-6xl: 3.75rem;   /* 60px */
  
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;
  
  /* Spacing Scale - Generous for Premium Feel */
  --space-0: 0;
  --space-1: 0.25rem;    /* 4px */
  --space-2: 0.5rem;     /* 8px */
  --space-3: 0.75rem;    /* 12px */
  --space-4: 1rem;       /* 16px */
  --space-5: 1.25rem;    /* 20px */
  --space-6: 1.5rem;     /* 24px */
  --space-8: 2rem;       /* 32px */
  --space-10: 2.5rem;    /* 40px */
  --space-12: 3rem;      /* 48px */
  --space-16: 4rem;      /* 64px */
  --space-20: 5rem;      /* 80px */
  --space-24: 6rem;      /* 96px */
  
  /* Radius - Soft & Organic */
  --radius-sm: 0.25rem;  /* 4px */
  --radius-md: 0.5rem;   /* 8px */
  --radius-lg: 0.75rem;  /* 12px */
  --radius-xl: 1rem;     /* 16px */
  --radius-full: 9999px;
  
  /* Shadows - Soft & Diffused */
  --shadow-sm: 0 1px 2px 0 rgba(44, 44, 44, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(44, 44, 44, 0.08), 0 2px 4px -1px rgba(44, 44, 44, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(44, 44, 44, 0.08), 0 4px 6px -2px rgba(44, 44, 44, 0.03);
  --shadow-xl: 0 20px 25px -5px rgba(44, 44, 44, 0.08), 0 10px 10px -5px rgba(44, 44, 44, 0.02);
  --shadow-inner: inset 0 2px 4px 0 rgba(44, 44, 44, 0.06);
  
  /* Transitions - Smooth & Refined */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout */
  --container-max: 1440px;
  --container-narrow: 768px;
}

/* ========================================
   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;
  }
}

body {
  min-height: 100vh;
  line-height: var(--line-height-normal);
  text-rendering: optimizeLegibility;
}

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;
}

/* ========================================
   BASE STYLES
   ======================================== */

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 400;
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: var(--line-height-tight);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

h1 { font-size: var(--text-5xl); letter-spacing: -0.02em; }
h2 { font-size: var(--text-4xl); letter-spacing: -0.01em; }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); font-weight: 600; }

p {
  margin-bottom: var(--space-4);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
}

/* Links */
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: 2px;
}

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

/* ========================================
   UTILITIES
   ======================================== */

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

@media (min-width: 640px) {
  .container {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-12);
    padding-right: var(--space-12);
  }
}

/* Flex Utilities */
.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-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Grid Utilities */
.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 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-width: 0;
}

/* ========================================
   COMPONENTS
   ======================================== */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.025em;
  text-transform: uppercase;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 1px solid transparent;
}

.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-white)!important;
  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);
}

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

.btn--secondary:hover:not(:disabled) {
  border-color: var(--color-text);
  background-color: var(--color-bg-secondary);
}

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

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

/* Form Inputs */
.input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

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

.input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

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

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

/* Cards */
.card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-200);
  transition: box-shadow var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card--beige {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-gray-300);
}

/* Navigation (Mega Menu Base) */
.nav-link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

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

/* Focus Visible Global */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .btn:hover:not(:disabled) {
    transform: none;
  }
  
  .card:hover {
    box-shadow: var(--shadow-sm);
  }
}