/* ==========================================================================
   PLUS for Node-RED - Modern CSS Base
   Mobile-First | CSS Custom Properties | Modern CSS Features
   ========================================================================== */

/* ==========================================================================
   FONTS - Optimized with font-display: swap
   ========================================================================== */
  
@font-face {
  font-family: 'Gilroy';
  font-weight: 900;
  font-style: normal;
  font-display: swap;
  src: url('../assets/fonts/Gilroy-Black.ttf') format('truetype');
}

@font-face {
  font-family: 'Gilroy';
  font-weight: 800;
  font-style: normal;
  font-display: swap;
  src: url('../assets/fonts/Gilroy-ExtraBold.ttf') format('truetype');
}

@font-face {
  font-family: 'Gilroy';
  font-weight: 700;
  font-style: normal;
  font-display: swap;
  src: url('../assets/fonts/Gilroy-Bold.ttf') format('truetype');
}

@font-face {
  font-family: 'Gilroy';
  font-weight: 600;
  font-style: normal;
  font-display: swap;
  src: url('../assets/fonts/Gilroy-SemiBold.ttf') format('truetype');
}

@font-face {
  font-family: 'Gilroy';
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  src: url('../assets/fonts/Gilroy-Medium.ttf') format('truetype');
}

@font-face {
  font-family: 'Gilroy';
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  src: url('../assets/fonts/Gilroy-Regular.ttf') format('truetype');
}

@font-face {
  font-family: 'Gilroy';
  font-weight: 300;
  font-style: normal;
  font-display: swap;
  src: url('../assets/fonts/Gilroy-Light.ttf') format('truetype');
}

/* ==========================================================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ========================================================================== */

:root {
  /* ========== Color System ========== */
  /* Primary Colors */
  --color-primary: #E20036;
  --color-primary-light: #ff1a4d;
  --color-primary-dark: #b8002b;
  --color-primary-glow: rgba(226, 0, 54, 0.4);
  
  /* Accent Colors */
  --color-accent: #8CE2E7;
  --color-accent-light: #b0ecef;
  --color-accent-dark: #07a096;
  --color-accent-glow: rgba(140, 226, 231, 0.3);
  
  /* Background Colors */
  --color-bg-primary: #1F2937;
  --color-bg-secondary: #19222D;
  --color-bg-tertiary: #0f161d;
  --color-bg-card: rgba(31, 41, 55, 0.85);
  --color-bg-card-hover: rgba(31, 41, 55, 0.95);
  --color-bg-overlay: rgba(15, 22, 29, 0.8);
  
  /* Surface Colors */
  --color-surface-light: #e6e6e6;
  --color-surface-lighter: #f3f4f6;
  --color-surface-white: #ffffff;
  
  /* Text Colors */
  --color-text-primary: #e6e6e6;
  --color-text-secondary: #c4c4c4;
  --color-text-muted: #9ca3af;
  --color-text-dark: #19222D;
  --color-text-accent: #8CE2E7;
  
  /* Border Colors */
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-accent: rgba(140, 226, 231, 0.5);
  --color-border-primary: rgba(226, 0, 54, 0.5);
  
  /* ========== Spacing System (8px base grid) ========== */
  --space-3xs: 0.125rem;  /* 2px */
  --space-2xs: 0.25rem;   /* 4px */
  --space-xs: 0.5rem;     /* 8px */
  --space-sm: 0.75rem;    /* 12px */
  --space-md: 1rem;       /* 16px */
  --space-lg: 1.5rem;     /* 24px */
  --space-xl: 2rem;       /* 32px */
  --space-2xl: 3rem;      /* 48px */
  --space-3xl: 4rem;      /* 64px */
  --space-4xl: 6rem;      /* 96px */
  --space-5xl: 8rem;      /* 128px */
  
  /* ========== Typography Scale (Fluid) ========== */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --text-base: clamp(1rem, 0.925rem + 0.375vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.375rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 2.5rem);
  --text-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 3.5rem);
  --text-5xl: clamp(3rem, 2rem + 5vw, 5rem);
  
  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;
  
  /* Font Weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;
  
  /* ========== Shadows ========== */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 16px 32px rgba(0, 0, 0, 0.5);
  --shadow-2xl: 0 24px 48px rgba(0, 0, 0, 0.6);
  --shadow-glow-accent: 0 0 30px var(--color-accent-glow);
  --shadow-glow-primary: 0 0 30px var(--color-primary-glow);
  --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.3);
  
  /* ========== Border Radius ========== */
  --radius-xs: 0.25rem;   /* 4px */
  --radius-sm: 0.375rem;  /* 6px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
  --radius-2xl: 1.5rem;   /* 24px */
  --radius-full: 9999px;
  
  /* ========== Transitions ========== */
  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 400ms;
  --duration-slower: 600ms;
  
  --transition-fast: var(--duration-fast) var(--ease-default);
  --transition-base: var(--duration-base) var(--ease-default);
  --transition-slow: var(--duration-slow) var(--ease-default);
  --transition-bounce: var(--duration-slow) var(--ease-bounce);
  
  /* ========== Z-Index Scale ========== */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  
  /* ========== Container Widths ========== */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
  
  /* ========== Navbar Height ========== */
  --navbar-height: 4rem;
  --navbar-height-lg: 5rem;
}

/* ==========================================================================
   CSS RESET - Modern Minimal Reset
   ========================================================================== */

*,
*::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;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  min-height: 100dvh; /* Dynamic viewport height for mobile */
  width: 100%;
  overflow-x: hidden;
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: 'Gilroy', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
}

/* ==========================================================================
   TYPOGRAPHY - Mobile First
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-primary);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  text-wrap: balance;
}

h1 {
  font-size: var(--text-3xl);
  font-weight: var(--font-extrabold);
}

h2 {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
}

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

h4 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
}

h5 {
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  line-height: var(--leading-normal);
}

h6 {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

p {
  color: var(--color-text-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  text-wrap: pretty;
}

/* Desktop Typography Enhancement */
@media (min-width: 1024px) {
  h1 {
    font-size: var(--text-4xl);
  }
  
  h2 {
    font-size: var(--text-3xl);
  }
}

/* ==========================================================================
   BASE ELEMENTS
   ========================================================================== */

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

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

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

img {
  object-fit: cover;
}

ul, ol {
  list-style: none;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-lg) 0;
}

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

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

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-xl);
  }
}

/* Section Spacing */
.section {
  padding-block: var(--space-3xl);
}

@media (min-width: 768px) {
  .section {
    padding-block: var(--space-4xl);
  }
}

@media (min-width: 1024px) {
  .section {
    padding-block: var(--space-5xl);
  }
}

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

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

/* Background Utilities */
.bg-primary { background-color: var(--color-bg-primary); }
.bg-secondary { background-color: var(--color-bg-secondary); }
.bg-surface { background-color: var(--color-surface-light); }

/* Flex Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* Grid Utilities */
.grid { display: grid; }
.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); }

@media (min-width: 640px) {
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Visibility */
.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;
}

/* ==========================================================================
   FOCUS STATES (Accessibility)
   ========================================================================== */

:focus {
  outline: none;
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   SELECTION STYLES
   ========================================================================== */

::selection {
  background-color: var(--color-accent);
  color: var(--color-bg-secondary);
}

/* ==========================================================================
   SCROLLBAR STYLES
   ========================================================================== */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-tertiary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-text-muted);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent);
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-text-muted) var(--color-bg-tertiary);
}

/* ==========================================================================
   BUTTON SYSTEM
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  font-family: inherit;
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  line-height: var(--leading-none);
  text-decoration: none;
  white-space: nowrap;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: 
    background-color var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.btn:active {
  transform: scale(0.98);
}

/* Primary Button (Accent Color) */
.btn-primary {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg-secondary);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-accent);
}

/* Secondary Button (Outline) */
.btn-secondary {
  background-color: transparent;
  border-color: var(--color-text-primary);
  color: var(--color-text-primary);
}

.btn-secondary:hover {
  background-color: var(--color-text-primary);
  color: var(--color-bg-secondary);
  transform: translateY(-2px);
}

/* Accent Button (Primary Color - Red) */
.btn-accent {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-primary);
}

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

/* Ghost Button */
.btn-ghost {
  background-color: transparent;
  border-color: var(--color-text-primary);
  color: var(--color-text-primary);
}

.btn-ghost:hover {
  background-color: var(--color-text-primary);
  color: var(--color-bg-primary);
  transform: translateY(-2px);
}

/* Light Buttons (for dark/colored backgrounds) */
.btn-light {
  background-color: white;
  border-color: white;
  color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.btn-light:hover {
  background-color: rgba(255, 255, 255, 0.9);
  border-color: white;
  color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.btn-outline-light {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: white;
  color: white;
}

.btn-outline-light:hover {
  background-color: white;
  border-color: white;
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--text-sm);
}

.btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--text-lg);
}

/* Button Group */
.btn-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  justify-content: center;
  width: 100%;
}

.btn-group .btn {
  width: 100%;
  max-width: 280px;
}

@media (min-width: 640px) {
  .btn-group {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    width: auto;
  }

  .btn-group .btn {
    width: auto;
    max-width: none;
  }
}

@media (min-width: 1024px) {
  .btn-group {
    justify-content: flex-start;
  }
}

/* ==========================================================================
   CARD SYSTEM
   ========================================================================== */

.card {
  position: relative;
  background: var(--color-bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  transition: 
    transform var(--transition-slow),
    border-color var(--transition-base),
    box-shadow var(--transition-slow);
}

.card:hover {
  transform: translateY(-8px);
  border-color: var(--color-border-accent);
  box-shadow: var(--shadow-xl), var(--shadow-glow-accent);
}

.card-accent {
  border-color: var(--color-accent);
}

.card-accent:hover {
  border-color: var(--color-accent-light);
}

/* ==========================================================================
   DIVIDER
   ========================================================================== */

.divider {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg) 0;
}

.divider svg {
  width: min(70%, 800px);
  height: auto;
  opacity: 0.6;
}

.divider.dark svg path {
  stroke: var(--color-bg-primary);
  stroke-width: 2px;
}

/* ==========================================================================
   SECTION TITLE
   ========================================================================== */

.section-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
  max-width: 720px;
  margin-inline: auto;
}

.section-header h2 {
  color: var(--color-text-primary);
}

.section-header p,
.section-header h5 {
  color: var(--color-text-secondary);
}

.section-header.dark h2,
.section-header.dark h5,
.section-header.dark p {
  color: var(--color-text-dark);
}

/* ==========================================================================
   HIGHLIGHT TEXT
   ========================================================================== */

.highlight {
  color: var(--color-primary);
}

.highlight-accent {
  color: var(--color-accent);
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ==========================================================================
   ANIMATIONS - Base Keyframes
   ========================================================================== */

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Animation Classes */
.animate-fade-in { animation: fadeIn var(--duration-slow) var(--ease-out); }
.animate-fade-in-up { animation: fadeInUp var(--duration-slow) var(--ease-out); }
.animate-fade-in-down { animation: fadeInDown var(--duration-slow) var(--ease-out); }
.animate-slide-in-left { animation: slideInLeft var(--duration-slow) var(--ease-out); }
.animate-slide-in-right { animation: slideInRight var(--duration-slow) var(--ease-out); }
.animate-scale-in { animation: scaleIn var(--duration-slow) var(--ease-out); }

/* Scroll Animation Classes */
.scroll-animate {
  opacity: 0;
  transform: translateY(40px);
  transition: 
    opacity var(--duration-slower) var(--ease-out),
    transform var(--duration-slower) var(--ease-out);
}

.scroll-animate.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger Delays */
.stagger-1 { transition-delay: 0ms; }
.stagger-2 { transition-delay: 100ms; }
.stagger-3 { transition-delay: 200ms; }
.stagger-4 { transition-delay: 300ms; }
.stagger-5 { transition-delay: 400ms; }
.stagger-6 { transition-delay: 500ms; }

/* ==========================================================================
   REDUCED MOTION
   ========================================================================== */

@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;
  }
  
  .scroll-animate {
    opacity: 1;
    transform: none;
  }
}