/* Ezekia Backup System - Design System v2.0
 * Based on: Heads International Design System + Ezekia Backup Requirements
 * Updated: November 2, 2025
 *
 * Color Scheme: Brand Approved - Black (#000) primary + Yellow (#FFEC2D) accent
 * Typography: System font stack for optimal performance and native feel
 * Layout: Generous whitespace, responsive grid system
 */

/* ============================================
   CSS Variables - Design Tokens
   ============================================ */

:root {
  /* Colors - Brand Approved: Black Primary + Yellow Accent */
  --color-primary: #000000;          /* Brand approved: Black primary */
  --color-primary-dark: #1a1a1a;     /* Slightly lighter than black for hover states */
  --color-primary-light: #333333;    /* Lighter variant for subtle uses */
  --color-accent: #FFEC2D;           /* Brand approved: Yellow accent */
  --color-accent-dark: #e6d429;      /* Darker yellow for hover states */
  --color-text: #000000;             /* Pure black text */
  --color-text-muted: #666666;       /* Gray for secondary text */
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-border: #dee2e6;
  --color-success: #28a745;
  --color-warning: #ffc107;
  --color-error: #dc3545;
  --color-info: #17a2b8;

  /* Layout */
  --container-max-width: 1200px;
  --container-padding: 2rem;

  /* Spacing Scale */
  --space-xs: 0.5rem;    /* 8px */
  --space-sm: 1rem;      /* 16px */
  --space-md: 2rem;      /* 32px */
  --space-lg: 3rem;      /* 48px */
  --space-xl: 4rem;      /* 64px */
  --space-2xl: 6rem;     /* 96px */

  /* Typography Scale */
  --text-xs: 0.875rem;   /* 14px */
  --text-sm: 1rem;       /* 16px */
  --text-base: 1.125rem; /* 18px */
  --text-lg: 1.25rem;    /* 20px */
  --text-xl: 1.5rem;     /* 24px */
  --text-2xl: 2rem;      /* 32px */
  --text-3xl: 2.5rem;    /* 40px */
  --text-4xl: 3rem;      /* 48px */

  /* Font Family - System fonts for optimal performance */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

  /* Font Weights */
  --font-light: 300;
  --font-regular: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  /* Line Heights */
  --leading-tight: 1.2;
  --leading-normal: 1.5;
  --leading-relaxed: 1.6;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 50%;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Z-index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-tooltip: 1050;
}

/* ============================================
   Base Styles
   ============================================ */

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

body {
  font-family: var(--font-family);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1, h2, h3, h4, h5, h6 {
  line-height: var(--leading-tight);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

h1 {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
}

h2 {
  font-size: var(--text-3xl);
}

h3 {
  font-size: var(--text-2xl);
}

h4 {
  font-size: var(--text-xl);
}

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

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

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

strong, .emphasis {
  font-weight: var(--font-semibold);
}

/* ============================================
   Layout Components
   ============================================ */

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.section {
  padding: var(--space-xl) 0;
}

.section--large {
  padding: var(--space-2xl) 0;
}

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

/* ============================================
   Header / Navigation
   ============================================ */

.header, header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: var(--color-bg);
  box-shadow: var(--shadow-sm);
  transform: translateY(0);
  transition: transform 0.3s ease-in-out, box-shadow var(--transition-base);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header--hidden {
  transform: translateY(-100%);
}

header .container {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-md);
  min-height: 80px;
  padding-top: var(--space-sm);
  padding-bottom: var(--space-sm);
}

.header__logo {
  display: flex;
  justify-content: center;
  align-items: center;
}

.header__logo img {
  height: 50px;
  width: auto;
}

.header__right {
  display: flex;
  justify-content: flex-end;
}

header h1 {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  margin: 0;
}

header h1 a {
  color: var(--color-text);
  text-decoration: none;
}

header h1 a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

header nav {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

header nav span {
  font-weight: var(--font-regular);
  color: var(--color-text-muted);
  padding: var(--space-xs) var(--space-sm);
}

/* ============================================
   Cards
   ============================================ */

.card {
  background-color: #ffffff;
  border-radius: var(--radius-md);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  border: 1px solid var(--color-border);
}

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

.card__image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
}

.card__image--circular {
  border-radius: var(--radius-full);
  aspect-ratio: 1;
  object-fit: cover;
}

.card__title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-xs);
}

.card__subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.card__content {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  text-align: center;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  line-height: 1;
}

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

.btn--primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
  color: #ffffff;
}

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

.btn--secondary:hover {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-accent);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn--accent {
  background-color: var(--color-accent);
  color: #000;
  border-color: var(--color-accent);
}

.btn--accent:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ============================================
   Grid System
   ============================================ */

.grid {
  display: grid;
  gap: var(--space-md);
}

.grid--2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid--4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ============================================
   Forms (Ezekia Backup Specific)
   ============================================ */

.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: var(--font-medium);
  color: var(--color-text);
}

.form-input,
.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: var(--text-base);
  font-family: var(--font-family);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-base);
}

.form-input:focus,
.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(255, 236, 45, 0.2);
}

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

/* ============================================
   Tags (Ezekia Backup Specific)
   ============================================ */

.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  background-color: var(--color-primary-light);
  color: #ffffff;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.tag-secondary {
  background-color: var(--color-bg-alt);
  color: var(--color-text-muted);
}

.tag-accent {
  background-color: var(--color-accent);
  color: #000;
}

/* ============================================
   Alerts (Ezekia Backup Specific)
   ============================================ */

.alert {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  border-left: 4px solid;
}

.alert-success {
  background-color: #fffef0;
  border-color: var(--color-accent);
  color: #000;
  font-weight: var(--font-medium);
}

.alert-warning {
  background-color: #fff9e6;
  border-color: var(--color-accent);
  color: #000;
  font-weight: var(--font-medium);
}

.alert-error {
  background-color: #fff;
  border-color: #000;
  color: #000;
  font-weight: var(--font-medium);
}

.alert-info {
  background-color: #f5f5f5;
  border-color: #000;
  color: #000;
  font-weight: var(--font-medium);
}

/* Yellow accent alert for critical items */
.alert-accent {
  background-color: #fffef0;
  border-color: var(--color-accent);
  color: #000;
  border-left-width: 3px;
}

/* ============================================
   Search Results (Ezekia Backup Specific)
   ============================================ */

.search-input {
  display: flex;
  gap: var(--space-sm);
  width: 100%;
}

.search-input .form-control {
  flex: 1;
}

.search-clear-btn {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  font-size: 20px;
  line-height: 1;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  padding: 0;
}

.search-clear-btn:hover {
  background-color: rgba(0, 0, 0, 0.1);
  color: var(--color-primary);
}

.results-container {
  margin-top: var(--space-xl);
}

/* ============================================
   Loading States
   ============================================ */

.loading {
  text-align: center;
  padding: var(--space-xl);
  color: var(--color-text-muted);
  font-size: var(--text-lg);
}

/* ============================================
   Utility Classes
   ============================================ */

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

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

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

.text-accent {
  color: var(--color-accent-dark);
}

/* Margin utilities */
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }

/* ============================================
   Print Styles (Ezekia Backup - Emergency Access)
   ============================================ */

@media print {
  * {
    background: white !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  header, .btn, .alert {
    display: none !important;
  }

  body {
    font-size: 12pt;
    line-height: 1.4;
  }

  h1 { font-size: 18pt; }
  h2 { font-size: 16pt; }
  h3 { font-size: 14pt; }

  .card {
    border: 1px solid #000;
    page-break-inside: avoid;
  }

  a {
    text-decoration: underline;
    color: #000;
  }

  a[href]:after {
    content: " (" attr(href) ")";
  }
}

/* ============================================
   Responsive Breakpoints
   ============================================ */

@media (max-width: 768px) {
  :root {
    --text-4xl: 2rem;
    --text-3xl: 1.75rem;
    --text-2xl: 1.5rem;
    --container-padding: 1rem;
  }

  header .container {
    min-height: 60px;
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .header__left {
    text-align: center;
  }

  .header__logo img {
    height: 40px;
  }

  .header__right {
    justify-content: center;
  }

  header nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
  }

  .section {
    padding: var(--space-lg) 0;
  }

  .btn {
    padding: 0.65rem 1.5rem;
    font-size: var(--text-sm);
  }
}

@media (max-width: 480px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .search-input {
    flex-direction: column;
  }
}

/* ============================================
   Enhanced Navigation - Heads International Style
   ============================================ */

/* Navigation menu */
.nav__menu {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__item {
  position: relative;
}

.nav__link {
  display: block;
  padding: var(--space-xs) var(--space-sm);
  font-weight: var(--font-medium);
  color: var(--color-text);
  text-decoration: none;
  transition: all var(--transition-base);
  border-bottom: 2px solid transparent;
}

.nav__link:hover {
  border-bottom-color: var(--color-accent);
  text-decoration: none;
}

.nav__link.active {
  border-bottom-color: var(--color-accent);
}

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

.nav__dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  cursor: pointer;
}

.nav__dropdown-toggle::after {
  content: '▼';
  font-size: 0.75em;
  transition: transform var(--transition-base);
}

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

.nav__dropdown--open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__dropdown-item {
  display: block;
  padding: var(--space-xs) var(--space-md);
  color: var(--color-text);
  text-decoration: none;
  transition: background-color var(--transition-fast);
}

.nav__dropdown-item:hover {
  background-color: var(--color-bg-alt);
  text-decoration: none;
}

/* Hamburger menu button (always visible, positioned on right) */
.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: var(--z-fixed);
}

.mobile-menu-btn__line {
  width: 100%;
  height: 3px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.mobile-menu-btn--open .mobile-menu-btn__line:nth-child(1) {
  transform: rotate(45deg) translateY(10px);
}

.mobile-menu-btn--open .mobile-menu-btn__line:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn--open .mobile-menu-btn__line:nth-child(3) {
  transform: rotate(-45deg) translateY(-10px);
}

/* Hamburger navigation menu (slides in from right) */
.nav__mobile {
  display: block;
  position: fixed;
  top: 0;
  right: 0;
  width: 320px;
  max-width: 85%;
  height: 100vh;
  background: white;
  z-index: var(--z-modal);
  padding: 100px var(--space-lg) var(--space-lg);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  overflow-y: auto;
  box-shadow: -4px 0 12px rgba(0, 0, 0, 0.1);
}

.nav__mobile--open {
  transform: translateX(0);
}

/* Close button in hamburger menu */
.nav__close-btn {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  z-index: calc(var(--z-modal) + 1);
  transition: transform var(--transition-fast);
}

.nav__close-btn:hover {
  transform: rotate(90deg);
}

.nav__close-icon {
  display: block;
  font-size: var(--text-2xl);
  line-height: 1;
  color: var(--color-text);
  font-weight: var(--font-light);
}

.nav__mobile .nav__menu {
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-sm);
}

.nav__mobile .nav__link {
  font-size: var(--text-lg);
  padding: var(--space-sm) 0;
  width: 100%;
}

.nav__mobile .nav__dropdown {
  position: static;
  box-shadow: none;
  padding-left: var(--space-md);
  opacity: 1;
  visibility: visible;
  transform: none;
  min-width: auto;
  background: transparent;
  margin-top: var(--space-xs);
}

/* Brand visibility */
.nav__brand {
  display: inline-block;
}

/* Responsive behavior - hamburger menu always visible */
@media (max-width: 768px) {
  .nav__brand {
    display: none;
  }

  header .container {
    grid-template-columns: auto 1fr auto;
  }

  .header__logo {
    order: 2;
  }

  .header__left {
    order: 1;
  }

  .header__right {
    order: 3;
  }

  .nav__mobile {
    width: 280px;
  }
}