/**
 * =============================================================================
 * MPM • KARANG MULYA RESIDENCE 2 — ULTRA-PREMIUM UNIFIED DESIGN SYSTEM
 * =============================================================================
 * Architectural Dignity • Natural Warmth • High-Converting Mobile UX
 * Designed for First-Time Homebuyers in Pangkalan Banteng (KPR FLPP)
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Plus+Jakarta+Sans:ital,wght@0,500;0,600;0,700;0,800;1,600&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
  /* 1. Brand Palette: Lush Evergreen Pine + Warm Clay + Soft Ivory Canvas */
  --color-primary: #0F3924;          /* Deep Forest Pine — Trust & Nature */
  --color-primary-dark: #082416;     /* Deep Pine Hover */
  --color-primary-light: #E7F2EB;    /* Sage Tint */
  --color-primary-subtle: #F1F7F4;   /* Pale Sage Wash */
  --color-primary-border: rgba(15, 57, 36, 0.12);

  --color-accent: #C85228;           /* Terracotta / Architectural Clay Tile */
  --color-accent-dark: #A63F1B;      /* Deep Terracotta */
  --color-accent-light: #FAECE6;     /* Peach Terracotta Tint */
  --color-accent-subtle: #FCF4F1;

  --color-gold: #B45309;             /* Warm Amber / Gold for FLPP Prestige */
  --color-gold-light: #FEF3C7;
  --color-gold-border: rgba(180, 83, 9, 0.2);

  --color-whatsapp: #25D366;         /* Official WhatsApp Green */
  --color-whatsapp-dark: #1EBE5D;    /* WhatsApp Dark Hover */
  --color-whatsapp-glow: rgba(37, 211, 102, 0.35);

  /* 2. Surfaces & Canvas */
  --color-bg: #F8F7F4;               /* Warm Architectural Alabaster / Ivory */
  --color-surface: #FFFFFF;          /* Pure White Card Elevate */
  --color-surface-alt: #F3F1EC;      /* Soft Muted Ivory for Wells */
  --color-surface-hover: #FAFAF8;

  /* 3. Typography & Text Hierarchy (WCAG Contrast >= 4.5:1) */
  --color-text: #131A15;             /* Deep Charcoal Near-Black */
  --color-text-secondary: #3C4A40;   /* Readable Dark Pine Gray */
  --color-text-muted: #647368;       /* Subtle Metadata Gray */
  --color-border: #E4E2DC;           /* Warm Fine Divider */
  --color-border-light: #EDEBE6;     /* Whisper Border */

  /* 4. Semantic Accents */
  --color-success: #15803D;
  --color-success-bg: #DCFCE7;
  --color-warning: #B45309;
  --color-warning-bg: #FEF3C7;

  /* 5. Modern Multi-Layer Diffused Elevation */
  --shadow-xs: 0 1px 2px rgba(15, 57, 36, 0.04);
  --shadow-sm: 0 2px 6px -1px rgba(15, 57, 36, 0.06), 0 1px 3px -1px rgba(15, 57, 36, 0.03);
  --shadow-md: 0 8px 24px -4px rgba(15, 57, 36, 0.07), 0 3px 8px -2px rgba(15, 57, 36, 0.03);
  --shadow-lg: 0 16px 36px -6px rgba(15, 57, 36, 0.10), 0 6px 14px -3px rgba(15, 57, 36, 0.05);
  --shadow-xl: 0 24px 56px -12px rgba(15, 57, 36, 0.14), 0 8px 20px -4px rgba(15, 57, 36, 0.06);
  --shadow-bottom-bar: 0 -4px 24px rgba(15, 57, 36, 0.08);

  /* 6. Refined Border Radii */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* 7. Rhythm & Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  --section-gap: var(--space-12);
}

@media (min-width: 768px) {
  :root {
    --section-gap: var(--space-16);
  }
}

/* =============================================================================
   TYPOGRAPHY & GLOBAL STYLES
   ============================================================================= */
html, body {
  overflow-x: hidden;
  max-width: 100%;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

h1, h2, h3, h4, h5, h6, .font-heading {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--color-text);
  line-height: 1.2;
}

.font-mono, .font-tabular {
  font-variant-numeric: tabular-nums lining-nums;
}

.text-fluid-h1 {
  font-size: clamp(26px, 5.8vw, 46px);
  line-height: 1.14;
  letter-spacing: -0.03em;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.65);
}

.text-fluid-h2 {
  font-size: clamp(22px, 4.6vw, 36px);
  line-height: 1.22;
  letter-spacing: -0.025em;
}

p, li, .text-prose {
  line-height: 1.65;
  color: var(--color-text-secondary);
  max-width: 68ch;
}

/* Selection */
::selection {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* =============================================================================
   ACCESSIBILITY & FOCUS
   ============================================================================= */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.touch-target, 
button, 
a.btn, 
input, 
select {
  min-height: 44px;
  min-width: 44px;
}

@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;
  }
}

/* =============================================================================
   COMPONENTS DESIGN SYSTEM
   ============================================================================= */

/* 1. BUTTONS */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 14px;
  border-radius: var(--radius-full);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
  border: 1px solid rgba(255, 255, 255, 0.1);
  cursor: pointer;
  text-decoration: none;
}
.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  background-color: var(--color-accent);
  color: #FFFFFF;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 14px;
  border-radius: var(--radius-full);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
  border: 1px solid rgba(255, 255, 255, 0.15);
  cursor: pointer;
  text-decoration: none;
}
.btn-secondary:hover {
  background-color: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-secondary:active {
  transform: scale(0.98);
}

.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  background-color: var(--color-whatsapp);
  color: #FFFFFF;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 14px;
  border-radius: var(--radius-full);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 14px rgba(37, 211, 102, 0.35);
  white-space: nowrap;
  border: 1px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
  text-decoration: none;
}
.btn-whatsapp:hover {
  background-color: var(--color-whatsapp-dark);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.45);
  transform: translateY(-1px);
}
.btn-whatsapp:active {
  transform: scale(0.98);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  background-color: #FFFFFF;
  color: var(--color-text);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  font-size: 13px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  transition: all 0.2s ease;
  cursor: pointer;
  text-decoration: none;
  box-shadow: var(--shadow-xs);
}
.btn-ghost:hover {
  background-color: var(--color-primary-subtle);
  border-color: var(--color-primary-border);
  color: var(--color-primary);
  transform: translateY(-1px);
}

/* 2. CHIPS & BADGES */
.eyebrow-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'Space Grotesk', monospace;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-primary-border);
  box-shadow: var(--shadow-xs);
}

.stat-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: var(--color-text);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* 3. SEGMENTED CONTROLS */
.segmented-control {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  background-color: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
}
.segmented-item {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-muted);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  border: none;
  background: transparent;
  cursor: pointer;
  white-space: nowrap;
}
.segmented-item:hover {
  color: var(--color-text);
}
.segmented-item.active {
  background-color: #FFFFFF;
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  font-weight: 700;
}

/* 4. CARDS & ELEVATED PANELS */
.ui-card {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.ui-card:hover {
  border-color: rgba(15, 57, 36, 0.16);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* 5. STICKY MOBILE BOTTOM BAR */
.mobile-sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: 10px 16px 14px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--color-border);
  box-shadow: var(--shadow-bottom-bar);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
}
.mobile-sticky-bar.hidden-by-form {
  transform: translateY(100%);
  opacity: 0;
  pointer-events: none;
}

/* 6. FAQ ACCORDION */
.faq-accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  text-align: left;
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  cursor: pointer;
  transition: all 0.2s ease;
}
.faq-accordion-header:hover {
  background-color: var(--color-surface-hover);
  color: var(--color-primary);
}
.faq-accordion-header[aria-expanded="true"] {
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  border-bottom-color: transparent;
  color: var(--color-primary);
}
.faq-accordion-body {
  padding: 16px 22px 22px;
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-top: none;
  border-bottom-left-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text-secondary);
}

/* 7. PROGRESS INVENTORY BAR */
.unit-meter-bg {
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: var(--color-surface-alt);
  overflow: hidden;
}
.unit-meter-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, #10B981, #059669);
  transition: width 0.5s ease;
}

/* =============================================================================
   RESPONSIVE DISPLAY RULES
   ============================================================================= */
.desktop-nav {
  display: none !important;
}

@media (min-width: 1024px) {
  .desktop-nav {
    display: flex !important;
  }
  .mobile-only {
    display: none !important;
  }
}