/**
 * SIGNATURE PROPERTY & CONSULTANT — Core Luxury Stylesheet
 * Architectural Design System & Interactive Motion Tokens
 * Version: 2.0.0
 * Licensed for: Signature Property & Consultant (Lahore, PK)
 */

/* ==========================================================================
   1. DESIGN TOKENS & ROOT VARIABLES
   ========================================================================== */
:root {
  /* Brand Palette */
  --brand-green: #00AF62;
  --brand-green-hover: #009653;
  --brand-teal: #005F4B;
  --brand-teal-dark: #004537;
  --brand-dark: #090b0c;
  --brand-obsidian: #0A0A0A;
  --brand-ecru: #f5f5f2;
  --brand-sand: #e9e8e4;
  --brand-stone: #dedfdb;
  --brand-white: #ffffff;

  /* Typography */
  --font-primary: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-serif: 'Instrument Serif', Georgia, Cambria, 'Times New Roman', serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Elevation & 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-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 35px -5px rgba(0, 175, 98, 0.35);

  /* Transitions & Timing */
  --ease-luxury: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-fast: 200ms;
  --duration-normal: 400ms;
  --duration-slow: 800ms;

  /* Layout */
  --nav-height: 4.875rem;
  --container-width: 91.5vw;
}

/* ==========================================================================
   2. BASE RESETS & SCROLL BEHAVIOR
   ========================================================================== */
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 1rem);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--brand-ecru);
  color: var(--brand-dark);
  font-family: var(--font-primary);
  overflow-x: hidden;
}

::selection {
  background-color: var(--brand-teal);
  color: var(--brand-white);
}

/* ==========================================================================
   3. LUXURY INVERTED MIX-BLEND CURSOR
   ========================================================================== */
#cursor {
  position: fixed;
  left: -100px;
  top: -100px;
  width: 0.75rem;
  height: 0.75rem;
  background-color: var(--brand-white);
  border-radius: 9999px;
  mix-blend-mode: difference;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: width var(--duration-fast) var(--ease-luxury),
              height var(--duration-fast) var(--ease-luxury),
              transform 60ms linear;
  will-change: transform, width, height;
}

#cursor.cursor-hover {
  width: 3.25rem;
  height: 3.25rem;
}

/* Hide custom cursor on touch devices or fine pointer absent */
@media (pointer: coarse), (hover: none) {
  #cursor {
    display: none !important;
  }
}

/* ==========================================================================
   4. NAVIGATION & FROSTED GLASS
   ========================================================================== */
#nav {
  height: var(--nav-height);
  transition: background-color var(--duration-normal) var(--ease-luxury),
              backdrop-filter var(--duration-normal) var(--ease-luxury),
              border-color var(--duration-normal) var(--ease-luxury),
              box-shadow var(--duration-normal) var(--ease-luxury);
}

#nav.scrolled {
  background-color: rgba(245, 245, 242, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: rgba(0, 0, 0, 0.08);
  box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.03);
}

/* ==========================================================================
   5. AMBIENT PARTICLES CANVAS
   ========================================================================== */
#particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.45;
  overflow: hidden;
  z-index: 1;
}

#particles canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* ==========================================================================
   6. 3D CARD PERSPECTIVE TILT
   ========================================================================== */
.tilt {
  transform-style: preserve-3d;
  perspective: 56rem;
  transition: transform var(--duration-normal) var(--ease-luxury),
              background-color var(--duration-fast) ease,
              box-shadow var(--duration-fast) ease;
  will-change: transform;
}

/* ==========================================================================
   7. STAGGERED SCROLL REVEALS
   ========================================================================== */
.reveal {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--duration-slow) var(--ease-luxury),
              transform var(--duration-slow) var(--ease-luxury);
  will-change: opacity, transform;
}

html.js-ready .reveal {
  opacity: 0;
  transform: translateY(2rem);
}

html.js-ready .reveal.revealed {
  opacity: 1 !important;
  transform: translateY(0) !important;
}

/* ==========================================================================
   8. SINGLE-ACTIVE FAQ ACCORDION
   ========================================================================== */
.faq-item {
  transition: border-color var(--duration-fast) ease;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 500ms var(--ease-luxury);
  will-change: max-height;
}

.faq-icon {
  transform-origin: center;
  transition: transform 350ms var(--ease-luxury), color var(--duration-fast) ease;
}

/* ==========================================================================
   9. MODALS & OVERLAYS
   ========================================================================== */
.modal-overlay {
  animation: modalFadeIn 250ms var(--ease-luxury) forwards;
}

.modal-content {
  animation: modalScaleUp 300ms var(--ease-luxury) forwards;
}

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

@keyframes modalScaleUp {
  from {
    opacity: 0;
    transform: scale(0.96) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* Body lock when modal is open */
body.modal-open {
  overflow: hidden !important;
}

/* ==========================================================================
   10. ACCESSIBILITY & REDUCED MOTION PREFERENCES
   ========================================================================== */
:focus-visible {
  outline: 2px solid var(--brand-green);
  outline-offset: 3px;
}

@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;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }

  .tilt {
    transform: none !important;
  }

  #cursor {
    display: none !important;
  }
}

/* ==========================================================================
   11. PRINT STYLING
   ========================================================================== */
@media print {
  #nav,
  #cursor,
  #particles,
  .modal-overlay,
  #mobileMenu {
    display: none !important;
  }

  body {
    background-color: white !important;
    color: black !important;
  }
}