/* ============================================
   OnlySkunk - Main Stylesheet
   Design System & CSS Architecture - Phase 2
   ============================================ */

/* ============================================
   CSS CUSTOM PROPERTIES
   ============================================ */
:root {
  /* Colors - Primary */
  --color-primary: #2D5A27;
  --color-primary-dark: #1E3D1A;
  --color-primary-light: #4A8B42;

  /* Colors - Secondary */
  --color-secondary: #D4AF37;

  /* Colors - Background & Surface */
  --color-background: #FAFAFA;
  --color-surface: #FFFFFF;

  /* Colors - Text */
  --color-text: #1A1A1A;
  --color-text-muted: #666666;

  /* Colors - Border */
  --color-border: #E5E5E5;

  /* Colors - Semantic */
  --color-success: #28A745;
  --color-warning: #F59E0B;
  --color-error: #DC3545;

  /* Typography */
  --font-heading: 'Playfair Display', serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing (4px base) */
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-6: 1.5rem;   /* 24px */
  --space-8: 2rem;     /* 32px */
  --space-12: 3rem;    /* 48px */
  --space-16: 4rem;    /* 64px */

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

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  /* Z-index scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-drawer: 250;
  --z-modal: 300;
  --z-toast: 400;

  /* Container widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

/* ============================================
   CSS RESET
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul, ol {
  list-style: none;
}

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

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
  margin-block-end: var(--space-4);
}

/* Fluid typography with clamp() */
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: clamp(1.125rem, 2.5vw, 1.5rem); }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

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

p:last-child {
  margin-block-end: 0;
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.container--sm { max-width: var(--container-sm); }
.container--md { max-width: var(--container-md); }
.container--lg { max-width: var(--container-lg); }

/* Main content wrapper */
.main-content {
  min-height: calc(100vh - 200px);
  padding-block: var(--space-8);
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: white;
  padding: var(--space-2) var(--space-4);
  z-index: 1000;
  transition: top var(--transition-fast);
  border-radius: 0 0 var(--radius-md) 0;
}

.skip-link:focus {
  top: 0;
  text-decoration: none;
}

/* ============================================
   HEADER & NAVIGATION (BEM)
   ============================================ */
.header {
  background-color: var(--color-surface);
  border-block-end: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  box-shadow: var(--shadow-sm);
}

.nav {
  padding-block: var(--space-4);
}

.nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}

/* Nav Brand */
.nav__brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav__brand:hover {
  text-decoration: none;
}

.nav__logo {
  height: 45px;
  width: auto;
}

/* Nav Toggle (Hamburger) */
.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  z-index: calc(var(--z-drawer) + 1);
}

.nav__toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--transition-fast);
  border-radius: 2px;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Nav Menu */
.nav__menu {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  margin: 0;
  padding: 0;
}

.nav__item {
  position: relative;
}

.nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-text);
  font-weight: 500;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.nav__link:hover,
.nav__link:focus {
  background-color: var(--color-background);
  color: var(--color-primary);
  text-decoration: none;
}

.nav__link--active {
  color: var(--color-primary);
  background-color: rgba(45, 90, 39, 0.1);
}

/* Dropdown */
.nav__item--dropdown {
  position: relative;
}

.nav__dropdown-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__dropdown-icon {
  transition: transform var(--transition-fast);
}

.nav__item--dropdown:hover .nav__dropdown-icon,
.nav__dropdown-toggle[aria-expanded="true"] .nav__dropdown-icon {
  transform: rotate(180deg);
}

.nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}

.nav__item--dropdown:hover .nav__dropdown,
.nav__dropdown-toggle[aria-expanded="true"] + .nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__dropdown-link {
  display: block;
  padding: var(--space-2) var(--space-4);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.nav__dropdown-link:hover {
  background-color: var(--color-background);
  color: var(--color-primary);
  text-decoration: none;
}

/* Nav Actions */
.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav__cart,
.nav__account {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.nav__cart:hover,
.nav__account:hover {
  background-color: var(--color-background);
  color: var(--color-primary);
  text-decoration: none;
}

.nav__cart--active {
  color: var(--color-primary);
}

.nav__cart-count {
  position: absolute;
  top: 2px;
  right: 2px;
  min-width: 18px;
  height: 18px;
  background-color: var(--color-primary);
  color: var(--color-surface);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}

/* Mobile Navigation Drawer */
.nav__overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: var(--z-drawer);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.nav__overlay.active {
  opacity: 1;
}

/* ============================================
   HERO SECTION (BEM)
   ============================================ */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-surface);
  padding-block: var(--space-12) var(--space-16);
  text-align: center;
}

.hero__content {
  max-width: 800px;
  margin-inline: auto;
}

.hero__title {
  color: var(--color-surface);
  margin-block-end: var(--space-4);
  font-size: clamp(2rem, 6vw, 3.5rem);
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  margin-block-end: var(--space-8);
  opacity: 0.95;
}

.hero__cta {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
  margin-block-end: var(--space-8);
}

.hero__badges {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

.hero__badges .badge {
  background-color: rgba(255, 255, 255, 0.2);
  color: var(--color-surface);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
}

/* ============================================
   SECTION STYLES (BEM)
   ============================================ */
.section {
  padding-block: var(--space-12);
}

.section--alt {
  background-color: var(--color-surface);
}

.section__title {
  text-align: center;
  margin-block-end: var(--space-4);
}

.section__subtitle {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 600px;
  margin-inline: auto;
  margin-block-end: var(--space-8);
}

.section__cta {
  text-align: center;
  margin-block-start: var(--space-8);
}

/* ============================================
   PAGE HEADER
   ============================================ */
.page-header {
  background-color: var(--color-surface);
  padding-block: var(--space-8);
  border-block-end: 1px solid var(--color-border);
}

.page-header__title {
  margin-block-end: var(--space-2);
}

.page-header__desc {
  color: var(--color-text-muted);
  margin-block-end: 0;
}

/* ============================================
   BREADCRUMB (BEM)
   ============================================ */
.breadcrumb {
  margin-block-end: var(--space-4);
}

.breadcrumb__list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.breadcrumb__item {
  display: flex;
  align-items: center;
}

.breadcrumb__item:not(:last-child)::after {
  content: "/";
  margin-inline-start: var(--space-2);
  color: var(--color-border);
}

.breadcrumb__item a {
  color: var(--color-primary);
}

.breadcrumb__item a:hover {
  text-decoration: underline;
}

.breadcrumb__item[aria-current="page"] {
  color: var(--color-text);
  font-weight: 500;
}

/* ============================================
   FOOTER (BEM)
   ============================================ */
.footer {
  background-color: var(--color-primary-dark);
  color: var(--color-surface);
  padding-block: var(--space-12) var(--space-6);
  margin-block-start: var(--space-12);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(4, 1fr);
  gap: var(--space-8);
  margin-block-end: var(--space-8);
}

.footer__brand {
  max-width: 300px;
}

.footer__logo {
  margin-block-end: var(--space-4);
}

.footer__tagline {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer__column {
  min-width: 0;
}

.footer__heading {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-surface);
  margin-block-end: var(--space-4);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__links a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: var(--color-surface);
  text-decoration: none;
}

.footer__bottom {
  text-align: center;
  padding-block-start: var(--space-6);
  border-block-start: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__copyright {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.8);
  margin-block-end: var(--space-2);
}

.footer__disclaimer {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  margin-block-end: 0;
}

/* ============================================
   FOCUS STATES (Accessibility)
   ============================================ */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ============================================
   RESPONSIVE DESIGN (Mobile-first)
   ============================================ */
/* Small screens (640px and up) */
@media (min-width: 640px) {
  .container {
    padding-inline: var(--space-6);
  }
}

/* Medium screens (768px and up) */
@media (min-width: 768px) {
  .hero {
    padding-block: var(--space-16);
  }

  .footer__grid {
    grid-template-columns: 2fr repeat(4, 1fr);
  }
}

/* Large screens (1024px and up) */
@media (min-width: 1024px) {
  .container {
    padding-inline: var(--space-8);
  }
}

/* Mobile-specific styles (below 768px) */
@media (max-width: 767px) {
  .nav .container {
    flex-wrap: wrap;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: 0;
    left: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--color-surface);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-16) var(--space-6) var(--space-6);
    gap: var(--space-1);
    z-index: var(--z-drawer);
    transition: left var(--transition-normal);
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
  }

  .nav__menu.active {
    left: 0;
  }

  .nav__overlay {
    display: block;
  }

  .nav__link {
    padding: var(--space-3) var(--space-4);
    justify-content: space-between;
    width: 100%;
  }

  .nav__dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background-color: var(--color-background);
    border-radius: var(--radius-md);
    margin-block-start: var(--space-2);
    display: none;
  }

  .nav__item--dropdown.active .nav__dropdown {
    display: block;
  }

  .nav__dropdown-link {
    padding: var(--space-2) var(--space-4);
  }

  .hero {
    padding-block: var(--space-8) var(--space-12);
  }

  .hero__cta {
    flex-direction: column;
    align-items: center;
  }

  .hero__badges {
    flex-direction: column;
    align-items: center;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-6);
  }

  .footer__brand {
    max-width: none;
  }

  .footer__links {
    gap: var(--space-3);
  }
}

/* Extra small screens (below 480px) */
@media (max-width: 479px) {
  .nav__logo {
    height: 36px;
  }

  .section {
    padding-block: var(--space-8);
  }
}