/* ==========================================================================
   MEPFacilities Design Directory - Base Styles & Design System
   ========================================================================== */

/* ===== Google Fonts ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Poppins:wght@400;500;600;700;800;900&display=swap');

/* ===== CSS Custom Properties (Design Tokens) ===== */
:root {
  /* Brand Colors - From Logo */
  --color-green: #3B7D3C;          /* Primary brand green */
  --color-green-light: #4a9c4b;    /* Lighter green for hovers */
  --color-green-dark: #2d612e;     /* Darker green for depth */
  --color-navy: #1A2A5E;           /* Secondary navy blue */
  --color-navy-light: #253b7a;     /* Lighter navy */
  --color-navy-dark: #111d40;      /* Darker navy */
  
  /* Accent Colors */
  --color-orange: #ff6b35;         /* Orange accent for highlights */
  --color-cyan: #00d4c8;           /* Cyan accent for secondary emphasis */
  
  /* Base Colors */
  --color-white: #ffffff;
  --color-black: #0a0a0b;
  --color-charcoal-deep: #0d0d0f;
  --color-charcoal: #111113;
  --color-charcoal-light: #1a1a1e;
  --color-gray-dark: #232328;
  --color-gray: #3a3a42;
  --color-gray-light: #5a5a65;
  --color-gray-lighter: #8a8a95;
  
  /* Gradients */
  --gradient-green: linear-gradient(135deg, var(--color-green) 0%, var(--color-green-light) 100%);
  --gradient-navy: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
  --gradient-hero: linear-gradient(180deg, rgba(13,13,15,0) 0%, rgba(13,13,15,0.8) 50%, var(--color-charcoal-deep) 100%);
  --gradient-card: linear-gradient(145deg, rgba(26, 26, 30, 0.8) 0%, rgba(17, 17, 19, 0.95) 100%);
  --gradient-glow: radial-gradient(ellipse at center, rgba(59, 125, 60, 0.15) 0%, transparent 70%);
  
  /* Typography */
  --font-display: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Font Sizes */
  --text-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.75rem);
  --text-sm: clamp(0.8rem, 0.75rem + 0.25vw, 0.875rem);
  --text-base: clamp(0.9rem, 0.85rem + 0.25vw, 1rem);
  --text-lg: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-xl: clamp(1.15rem, 1.05rem + 0.5vw, 1.25rem);
  --text-2xl: clamp(1.4rem, 1.2rem + 1vw, 1.5rem);
  --text-3xl: clamp(1.75rem, 1.4rem + 1.75vw, 2rem);
  --text-4xl: clamp(2rem, 1.5rem + 2.5vw, 2.5rem);
  --text-5xl: clamp(2.5rem, 1.75rem + 3.75vw, 3.5rem);
  --text-6xl: clamp(3rem, 2rem + 5vw, 4.5rem);
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6);
  --shadow-glow-green: 0 0 40px rgba(59, 125, 60, 0.3);
  --shadow-glow-navy: 0 0 40px rgba(26, 42, 94, 0.3);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
  
  /* Z-Index Scale */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal: 400;
  --z-toast: 500;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -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 {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-white);
  background: var(--color-charcoal-deep);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Noise Texture Overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
  z-index: 9999;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-white);
}

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

img, svg {
  display: block;
  max-width: 100%;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ===== Layout ===== */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

@media (min-width: 768px) {
  .container { padding: 0 var(--space-xl); }
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-4xl);
}

.section-header h2 {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-md);
}

.section-header p {
  font-size: var(--text-lg);
  color: var(--color-gray-lighter);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Pills / Tags ===== */
.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-green);
  background: transparent;
  border: 1px solid var(--color-green);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.pill-navy {
  color: var(--color-navy-light);
  border-color: var(--color-navy-light);
}

.pill-cyan {
  color: var(--color-cyan);
  border-color: var(--color-cyan);
}

.pill-filled {
  background: var(--color-green);
  color: var(--color-white);
  border-color: var(--color-green);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::before { opacity: 1; }

.btn-primary {
  background: var(--gradient-green);
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(59, 125, 60, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(59, 125, 60, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.3);
}

.btn-ghost {
  background: transparent;
  color: var(--color-gray-lighter);
  padding: var(--space-sm) var(--space-md);
}

.btn-ghost:hover {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.05);
}

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

.btn-lg {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--text-base);
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ===== Form Elements ===== */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-lighter);
}

.form-input,
.form-textarea {
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-green);
  background: rgba(59, 125, 60, 0.05);
  box-shadow: 0 0 0 3px rgba(59, 125, 60, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-gray-light);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-input.error,
.form-textarea.error {
  border-color: #ff4757;
  background: rgba(255, 71, 87, 0.05);
}

.form-error {
  font-size: var(--text-xs);
  color: #ff4757;
  display: none;
}

.form-error.visible {
  display: block;
}

/* ===== Animations ===== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(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 shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* Reveal Animation Classes */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal.stagger-1 { transition-delay: 0.1s; }
.reveal.stagger-2 { transition-delay: 0.2s; }
.reveal.stagger-3 { transition-delay: 0.3s; }
.reveal.stagger-4 { transition-delay: 0.4s; }
.reveal.stagger-5 { transition-delay: 0.5s; }

/* ===== Page Loader ===== */
.page-loader {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-charcoal-deep);
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.loader-logo {
  width: 60px;
  height: 60px;
  animation: pulse 1.5s ease infinite;
}

/* ===== Page Transition ===== */
.page-transition {
  position: fixed;
  inset: 0;
  background: var(--color-charcoal-deep);
  transform: translateY(100%);
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 9998;
  pointer-events: none;
}

.page-transition.active {
  transform: translateY(0);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-gray-dark);
  border-radius: var(--radius-full);
  border: 2px solid var(--color-charcoal);
}

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

/* ===== Selection ===== */
::selection {
  background: rgba(59, 125, 60, 0.3);
  color: var(--color-white);
}

/* ===== Focus States ===== */
:focus-visible {
  outline: 2px solid var(--color-green);
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-green);
  outline-offset: 2px;
}