/*
 * Water Treatment Tools - Global UI Styles
 * Unified design system for all water treatment applications
 * 
 * To use in your app, add this line to your HTML head:
 * <link rel="stylesheet" href="../../global-styles.css">
 */

/* ===== CSS CUSTOM PROPERTIES (DESIGN TOKENS) ===== */
:root {
  /* Primary Color Palette */
  --primary-teal: #00677f;
  --primary-teal-light: #4a90a4;
  --primary-teal-dark: #004d5c;
  --secondary-blue: #1e3a5f;
  --secondary-blue-light: #2d5582;
  --accent-blue: #4a6b8a;
  
  /* Extended Color Palette */
  --accent-gold: #f2a900;
  --accent-gold-dark: #e6960a;
  --success-green: #4caf50;
  --warning-amber: #ff9800;
  --error-red: #f44336;
  --info-blue: #2196f3;
  
  /* Neutral Colors */
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  
  /* Typography */
  --font-family-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --font-family-mono: 'Courier New', monospace;
  
  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-black: 900;
  
  /* Font Sizes */
  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 1rem;    /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem;  /* 36px */
  
  /* Spacing Scale */
  --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 */
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  --radius-full: 50%;

  /* Global Navigation Defaults */
  --global-nav-padding: clamp(1.5rem, 4vw, 3rem);
  --global-nav-bg-start: rgba(14, 20, 48, 0.96);
  --global-nav-bg-end: rgba(24, 30, 68, 0.92);
  --global-nav-border: rgba(129, 140, 248, 0.28);
  --global-nav-shadow: 0 20px 40px rgba(3, 7, 18, 0.55);
  --global-nav-brand-shadow: 0 8px 16px rgba(3, 7, 18, 0.55);
  --global-nav-text: #f8faff;
  --global-nav-text-muted: rgba(232, 235, 255, 0.62);
  --global-nav-menu-bg: linear-gradient(135deg, rgba(14, 20, 48, 0.96), rgba(24, 30, 68, 0.92));
  --global-nav-menu-border: rgba(129, 140, 248, 0.32);
  --global-nav-menu-shadow: 0 26px 48px rgba(5, 9, 24, 0.6);
  --global-nav-dropdown-bg: rgba(10, 14, 34, 0.9);
  --global-nav-dropdown-border: rgba(129, 140, 248, 0.22);
  --global-nav-link-hover-bg: rgba(129, 140, 248, 0.2);
  --global-nav-link-hover-border: rgba(129, 140, 248, 0.45);
  --global-nav-link-active-bg: rgba(129, 140, 248, 0.25);
  --global-nav-link-active-border: rgba(129, 140, 248, 0.6);
  --global-nav-button-bg: rgba(12, 16, 36, 0.85);
  --global-nav-button-border: rgba(129, 140, 248, 0.35);
  --global-nav-button-hover-bg: rgba(18, 22, 48, 0.95);
  --global-nav-button-hover-border: rgba(129, 140, 248, 0.6);

  /* Shared Surface Gradients */
  --surface-gradient-primary: linear-gradient(135deg, rgba(99, 102, 241, 0.35), rgba(34, 211, 238, 0.18));
  --card-gradient: var(--surface-gradient-primary);

  /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-glass-lg: 0 20px 40px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
  
  /* Breakpoints (for reference in media queries) */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* ===== CSS RESET & BASE STYLES ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--gray-700);
  background:
    radial-gradient(circle at 18% 20%, rgba(88, 132, 255, 0.22), transparent 58%),
    radial-gradient(circle at 82% 18%, rgba(48, 196, 255, 0.16), transparent 55%),
    radial-gradient(circle at 70% 84%, rgba(60, 120, 235, 0.14), transparent 60%),
    linear-gradient(165deg, #04142c 0%, #071d3b 52%, #050f23 100%);
  min-height: 100vh;
}

body.has-mobile-nav-open {
  overflow: hidden;
}

/* ===== UTILITY CLASSES ===== */

/* Display Utilities */
.hidden { display: none !important; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

/* Flex Utilities */
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.flex-1 { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }

/* Grid Utilities */
.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.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); }
.grid-cols-auto { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

/* Gap Utilities */
.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-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Spacing Utilities */
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-5 { padding: var(--space-5); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.m-1 { margin: var(--space-1); }
.m-2 { margin: var(--space-2); }
.m-3 { margin: var(--space-3); }
.m-4 { margin: var(--space-4); }
.m-5 { margin: var(--space-5); }
.m-6 { margin: var(--space-6); }
.m-8 { margin: var(--space-8); }

.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); }

/***** GLOBAL NAVIGATION *****/
.global-nav {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky, 1020);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: nowrap;
  gap: clamp(0.6rem, 1vw, 1rem);
  padding: 1rem var(--global-nav-padding);
  background: linear-gradient(135deg, var(--global-nav-bg-start), var(--global-nav-bg-end));
  border-bottom: 1px solid var(--global-nav-border);
  box-shadow: var(--global-nav-shadow);
  backdrop-filter: blur(16px);
}

.global-nav__brand {
  display: inline-flex;
  align-items: center;
  gap: clamp(0.7rem, 1vw, 1rem);
  margin-right: clamp(0.65rem, 2vw, 1.5rem);
  text-decoration: none;
  flex: 1 1 auto;
  min-width: 0;
  color: var(--global-nav-text);
}

.global-nav__logo-picture {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.global-nav__logo-picture img {
  display: block;
}

.global-nav__logo {
  height: clamp(44px, 8vw, 58px);
  width: auto;
  object-fit: contain;
  filter: drop-shadow(var(--global-nav-brand-shadow));
}

.global-nav__brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.2;
}

.global-nav__overline {
  font-size: clamp(0.6rem, 0.7vw, 0.72rem);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--global-nav-text-muted);
}

.global-nav__title {
  font-size: clamp(0.98rem, 1.1vw + 0.7rem, 1.35rem);
  font-weight: 600;
  color: var(--global-nav-text);
  white-space: normal;
}

.global-nav__menu-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-left: auto;
  padding: 0.6rem 1.2rem;
  border-radius: 999px;
  border: 1px solid var(--global-nav-button-border);
  background: var(--global-nav-button-bg);
  color: var(--global-nav-text);
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-normal), border-color var(--transition-normal), color var(--transition-normal), box-shadow var(--transition-normal);
  flex-shrink: 0;
}

.global-nav__menu-toggle:hover,
.global-nav__menu-toggle:focus-visible {
  background: var(--global-nav-button-hover-bg);
  border-color: var(--global-nav-button-hover-border);
  box-shadow: 0 12px 24px rgba(99, 102, 241, 0.25);
  outline: none;
}

.global-nav__menu-toggle-icon {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  transition: transform var(--transition-normal), background var(--transition-normal);
}

.global-nav__menu-toggle-icon::before,
.global-nav__menu-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.global-nav__menu-toggle-icon::before { transform: translateY(-6px); }
.global-nav__menu-toggle-icon::after { transform: translateY(6px); }

.global-nav--menu-open .global-nav__menu-toggle-icon {
  background: transparent;
}

.global-nav--menu-open .global-nav__menu-toggle-icon::before {
  transform: rotate(45deg);
}

.global-nav--menu-open .global-nav__menu-toggle-icon::after {
  transform: rotate(-45deg);
}

.global-nav__menu {
  position: absolute;
  top: calc(100% + 0.55rem);
  left: auto;
  right: var(--global-nav-padding);
  width: min(360px, calc(100% - 2 * var(--global-nav-padding)));
  display: none;
  flex-direction: column;
  align-items: stretch;
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 1.1rem 1.4rem 1.6rem;
  background: var(--global-nav-menu-bg);
  border: 1px solid var(--global-nav-menu-border);
  border-radius: 20px;
  box-shadow: var(--global-nav-menu-shadow);
  backdrop-filter: blur(12px);
  z-index: var(--z-dropdown, 1000);
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

.global-nav--menu-open .global-nav__menu { display: flex; }

.global-nav__item {
  position: relative;
  width: 100%;
}

.global-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.55rem clamp(0.85rem, 1.2vw, 1.2rem);
  border-radius: 999px;
  font-size: clamp(0.85rem, 0.55vw + 0.7rem, 1.05rem);
  font-weight: 500;
  color: rgba(232, 235, 255, 0.9);
  border: 1px solid transparent;
  transition: background var(--transition-normal), color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  width: 100%;
  text-align: left;
  background: none;
}

.global-nav__link:hover,
.global-nav__link:focus-visible {
  color: var(--global-nav-text);
  background: var(--global-nav-link-hover-bg);
  border-color: var(--global-nav-link-hover-border);
  box-shadow: 0 12px 24px rgba(99, 102, 241, 0.25);
  outline: none;
}

.global-nav__link--active {
  background: var(--global-nav-link-active-bg);
  border-color: var(--global-nav-link-active-border);
  color: var(--global-nav-text);
  box-shadow: 0 12px 24px rgba(99, 102, 241, 0.3);
}

.global-nav__toggle {
  background: none;
  cursor: pointer;
}

.global-nav__caret {
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid rgba(232, 235, 255, 0.8);
  transition: transform var(--transition-normal);
  margin-top: 2px;
  margin-left: auto;
}

.global-nav__item--open .global-nav__caret {
  transform: rotate(-180deg);
}

.global-nav__dropdown {
  display: none;
  flex-direction: column;
  gap: 0.45rem;
  width: 100%;
  margin-top: 0.4rem;
  padding: 0.6rem;
  background: var(--global-nav-dropdown-bg);
  border: 1px solid var(--global-nav-dropdown-border);
  border-radius: 16px;
  box-shadow: inset 0 0 0 1px rgba(3, 7, 18, 0.4);
}

.global-nav__item--open .global-nav__dropdown {
  display: flex;
}

.global-nav__dropdown-link {
  display: block;
  padding: 0.65rem 1rem;
  border-radius: 12px;
  font-size: 1.05rem;
  color: rgba(232, 235, 255, 0.92);
  transition: background var(--transition-normal), color var(--transition-normal);
}

.global-nav__dropdown-link:hover,
.global-nav__dropdown-link:focus-visible {
  background: var(--global-nav-link-hover-bg);
  color: var(--global-nav-text);
  outline: none;
}
@media (max-width: 640px) {
  .global-nav {
    padding: 0.85rem clamp(0.85rem, 5vw, 1.1rem);
  }

  .global-nav__brand {
    gap: 0.55rem;
    margin-right: 0.5rem;
  }

  .global-nav__logo {
    height: clamp(42px, 12vw, 50px);
  }

  .global-nav__brand-text {
    line-height: 1.05;
    max-width: calc(100% - 56px);
  }

  .global-nav__overline {
    font-size: 0.6rem;
    letter-spacing: 0.22em;
  }

  .global-nav__title {
    font-size: clamp(0.85rem, 3vw + 0.5rem, 1.05rem);
  }

  .global-nav__menu-toggle {
    margin-left: 0.5rem;
    padding: 0.55rem 1rem;
  }
}

.global-nav__menu-toggle-label {
  font-size: 0.95rem;
}

.global-nav__item--align-end {
  margin-left: auto;
}

.global-nav__menu li {
  list-style: none;
}

/***** HERO LAYOUT *****/
.hero {
  display: flex;
  flex-direction: column;
  gap: clamp(0.6rem, 1.2vw, 0.9rem);
  padding: clamp(1.6rem, 3vw, 2.4rem);
  border-radius: 24px;
  background: var(--card-gradient);
  border: 1px solid rgba(129, 140, 248, 0.22);
  box-shadow: 0 28px 60px rgba(3, 7, 18, 0.6);
  color: var(--text-primary, #f8faff);
  text-align: left;
}

.hero__overline {
  margin: 0;
  font-size: clamp(0.68rem, 0.55vw + 0.45rem, 0.74rem);
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--text-muted, rgba(232, 235, 255, 0.7));
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.85rem, 2.1vw + 1.1rem, 2.45rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-primary, #f8faff);
}

.hero__lede {
  margin: 0;
  max-width: 48rem;
  font-size: clamp(0.97rem, 0.9vw + 0.6rem, 1.08rem);
  color: var(--text-secondary, rgba(232, 235, 255, 0.72));
}

.hero__lede + .hero__actions {
  margin-top: 0.5rem;
}
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }
.text-4xl { font-size: var(--font-size-4xl); }

.font-light { font-weight: var(--font-weight-light); }
.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }
.font-black { font-weight: var(--font-weight-black); }

/* Color Utilities */
.text-primary { color: var(--primary-teal); }
.text-secondary { color: var(--secondary-blue); }
.text-accent { color: var(--accent-gold); }
.text-success { color: var(--success-green); }
.text-warning { color: var(--warning-amber); }
.text-error { color: var(--error-red); }
.text-gray-500 { color: var(--gray-500); }
.text-gray-600 { color: var(--gray-600); }
.text-gray-700 { color: var(--gray-700); }
.text-white { color: var(--white); }

/* Border Radius Utilities */
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

/* ===== COMPONENT STYLES ===== */

/* Container */
.wt-container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: var(--space-4);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Glass Morphism Card */
.wt-card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-glass);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all var(--transition-normal);
}

.wt-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glass-lg);
}

.wt-card-compact {
  padding: var(--space-4);
}

.wt-card-spacious {
  padding: var(--space-8);
}

/* Header Component */
.wt-header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: var(--space-6) var(--space-8);
  box-shadow: var(--shadow-lg);
  margin-bottom: var(--space-8);
  border-radius: var(--radius-xl);
}

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

.wt-brand {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.wt-brand-text h1 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary-teal);
  margin-bottom: var(--space-1);
  line-height: 1.2;
}

.wt-tagline {
  color: var(--gray-600);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
}

.wt-logo {
  height: 80px;
  width: auto;
  object-fit: contain;
}

/* Navigation */
.wt-nav {
  display: flex;
  gap: var(--space-4);
}

.wt-nav-link {
  color: var(--gray-600);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.wt-nav-link:hover {
  background: rgba(0, 103, 127, 0.1);
  color: var(--primary-teal);
  text-decoration: none;
}

/* Button Components */
.wt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.wt-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.wt-btn:not(:disabled):hover {
  transform: translateY(-2px);
}

/* Button Variants */
.wt-btn-primary {
  background: linear-gradient(135deg, var(--primary-teal) 0%, var(--primary-teal-light) 100%);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(0, 103, 127, 0.3);
}

.wt-btn-primary:hover:not(:disabled) {
  box-shadow: 0 6px 16px rgba(0, 103, 127, 0.4);
}

.wt-btn-secondary {
  background: linear-gradient(135deg, var(--secondary-blue) 0%, var(--secondary-blue-light) 100%);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(30, 58, 95, 0.3);
}

.wt-btn-secondary:hover:not(:disabled) {
  box-shadow: 0 6px 16px rgba(30, 58, 95, 0.4);
}

.wt-btn-accent {
  background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-dark) 100%);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(242, 169, 0, 0.3);
}

.wt-btn-accent:hover:not(:disabled) {
  box-shadow: 0 6px 16px rgba(242, 169, 0, 0.4);
}

.wt-btn-outline {
  background: rgba(0, 103, 127, 0.1);
  color: var(--primary-teal);
  border: 2px solid rgba(0, 103, 127, 0.2);
}

.wt-btn-outline:hover:not(:disabled) {
  background: rgba(0, 103, 127, 0.2);
  border-color: rgba(0, 103, 127, 0.4);
}

.wt-btn-ghost {
  background: transparent;
  color: var(--gray-600);
}

.wt-btn-ghost:hover:not(:disabled) {
  background: var(--gray-100);
  color: var(--gray-700);
}

/* Button Sizes */
.wt-btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
}

.wt-btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
}

.wt-btn-xl {
  padding: var(--space-5) var(--space-10);
  font-size: var(--font-size-xl);
  border-radius: var(--radius-lg);
}

/* Form Components */
.wt-form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.wt-label {
  font-weight: var(--font-weight-semibold);
  color: var(--gray-700);
  font-size: var(--font-size-sm);
}

.wt-input {
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  background: var(--white);
  transition: all var(--transition-fast);
}

.wt-input:focus {
  outline: none;
  border-color: var(--primary-teal);
  box-shadow: 0 0 0 3px rgba(0, 103, 127, 0.1);
}

.wt-select {
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  background: var(--white);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.wt-select:focus {
  outline: none;
  border-color: var(--primary-teal);
  box-shadow: 0 0 0 3px rgba(0, 103, 127, 0.1);
}

/* Grid Layout */
.wt-grid {
  display: grid;
  gap: var(--space-6);
}

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

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

.wt-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

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

/* App Cards (for dashboard-style layouts) */
.wt-app-card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}

.wt-app-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(45deg, var(--primary-teal), var(--primary-teal-light));
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.wt-app-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  text-decoration: none;
  color: inherit;
}

.wt-app-icon {
  flex-shrink: 0;
  width: 50px;
  height: 50px;
  background: linear-gradient(45deg, var(--primary-teal), var(--primary-teal-light));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(0, 103, 127, 0.3);
  transition: transform var(--transition-normal);
}

.wt-app-card:hover .wt-app-icon {
  transform: scale(1.05);
}

.wt-app-info {
  flex: 1;
}

.wt-app-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--gray-700);
  margin-bottom: var(--space-1);
  line-height: 1.3;
}

.wt-app-description {
  color: var(--gray-600);
  font-size: var(--font-size-sm);
  line-height: 1.4;
}

/* Video/Content Cards */
.wt-video-card {
  background: rgba(255, 255, 255, 0.98);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(15px);
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(255, 255, 255, 0.2);
  height: 420px;
}

.wt-video-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.15);
}

.wt-video-thumbnail {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--primary-teal), var(--primary-teal-light));
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.wt-video-info {
  padding: var(--space-6);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.wt-video-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--primary-teal);
  line-height: 1.3;
}

.wt-video-description {
  color: var(--gray-600);
  font-size: var(--font-size-sm);
  line-height: 1.5;
  flex: 1;
}

/* Notification/Toast */
.wt-notification {
  position: fixed;
  top: var(--space-5);
  right: var(--space-5);
  background: var(--white);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border-left: 4px solid var(--success-green);
  z-index: var(--z-tooltip);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  max-width: 400px;
}

.wt-notification.show {
  transform: translateX(0);
}

.wt-notification.success {
  border-left-color: var(--success-green);
}

.wt-notification.warning {
  border-left-color: var(--warning-amber);
}

.wt-notification.error {
  border-left-color: var(--error-red);
}

.wt-notification.info {
  border-left-color: var(--info-blue);
}

/* Modal */
.wt-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: var(--z-modal);
  backdrop-filter: blur(5px);
}

.wt-modal-content {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  max-width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  position: relative;
}

/* Loading */
.wt-loading {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-8);
}

.wt-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--gray-200);
  border-top: 4px solid var(--primary-teal);
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Status Indicators */
.wt-status-dot {
  width: 8px;
  height: 8px;
  background: var(--success-green);
  border-radius: var(--radius-full);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ===== RESPONSIVE DESIGN ===== */

/* Tablet and below */
@media (max-width: 768px) {
  .wt-container {
    padding: var(--space-3);
  }
  
  .wt-header {
    padding: var(--space-4);
    margin-bottom: var(--space-6);
  }
  
  .wt-header-content {
    flex-direction: column;
    text-align: center;
  }
  
  .wt-brand-text h1 {
    font-size: var(--font-size-2xl);
  }
  
  .wt-nav {
    justify-content: center;
    flex-wrap: wrap;
  }
  
  .wt-grid-2,
  .wt-grid-3,
  .wt-grid-4 {
    grid-template-columns: 1fr;
  }
  
  .wt-app-card {
    flex-direction: column;
    text-align: center;
    padding: var(--space-4);
  }
  
  .wt-video-card {
    height: 380px;
  }
  
  .wt-video-card:hover {
    transform: translateY(-4px) scale(1.01);
  }
}

/* Mobile */
@media (max-width: 480px) {
  .wt-brand-text h1 {
    font-size: var(--font-size-xl);
  }
  
  .wt-card {
    padding: var(--space-4);
  }
  
  .wt-btn {
    padding: var(--space-3) var(--space-5);
    font-size: var(--font-size-sm);
  }
  
  .wt-notification {
    top: var(--space-3);
    right: var(--space-3);
    left: var(--space-3);
    transform: translateY(-100%);
    max-width: none;
  }
  
  .wt-notification.show {
    transform: translateY(0);
  }
}

/* Large screens optimization */
@media (min-width: 1200px) {
  .wt-grid-auto {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  }
}

@media (min-width: 1400px) {
  .wt-container {
    max-width: 1400px;
  }
  
  .wt-grid-auto {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  }
}

/* ===== PRINT STYLES ===== */
@media print {
  .wt-nav,
  .wt-btn,
  .wt-notification {
    display: none !important;
  }
  
  .wt-card {
    box-shadow: none;
    border: 1px solid var(--gray-300);
  }
  
  body {
    background: white;
  }
}

/* ===== DARK MODE SUPPORT (for future use) ===== */
@media (prefers-color-scheme: dark) {
  /* This section can be expanded when dark mode is needed */
  :root {
    --dark-bg: #0f172a;
    --dark-card: #1e293b;
    --dark-text: #f1f5f9;
  }
  
  /* Uncomment when ready to implement dark mode
  body {
    background: var(--dark-bg);
    color: var(--dark-text);
  }
  
  .wt-card {
    background: rgba(30, 41, 59, 0.95);
  }
  */
}

/* ===== ACCESSIBILITY IMPROVEMENTS ===== */

/* Focus styles */
.wt-btn:focus,
.wt-input:focus,
.wt-select:focus,
.wt-nav-link:focus {
  outline: 2px solid var(--primary-teal);
  outline-offset: 2px;
}

/* Reduce motion for users who prefer it */
@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;
  }
  
  .wt-spinner {
    animation: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .wt-btn {
    border: 2px solid currentColor;
  }
  
  .wt-card {
    border: 2px solid var(--gray-600);
  }
}