/* =============================================================================
   Walker Bay Painters -- Main Stylesheet (styles.css)
   Version: 2.0
   Design: "Quiet Luxury" -- restrained elegance, material honesty

   Contents:
     1. CSS Reset
     2. Design Tokens (Custom Properties)
     3. Base / Global Styles
     4. Skip Link
     5. Container & Layout Utilities
     6. Typography Utilities
     7. Overline Component
     8. Button Components
     9. Form Base Styles
    10. Scroll Reveal Animations
    11. Reduced Motion
    12. Responsive Breakpoints
   ============================================================================= */


/* =============================================================================
   1. CSS RESET
   Modern minimal reset -- Andy Bell approach, tuned for this project.
   ============================================================================= */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  scroll-behavior: smooth;
}

body {
  min-height: 100svh;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

a {
  color: inherit;
  text-decoration: none;
}

ul[role="list"],
ol[role="list"] {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
  text-wrap: balance;
}

p {
  overflow-wrap: break-word;
}

/* Remove default fieldset/legend styles */
fieldset {
  border: none;
  padding: 0;
}

/* Remove animations for people who've turned them off */
@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;
    scroll-behavior: auto !important;
  }
}


/* =============================================================================
   2. DESIGN TOKENS
   All CSS custom properties from DESIGN_SPEC.md Section 5.
   ============================================================================= */

:root {
  /* ===========================
     COLORS
     =========================== */
  --color-limestone: #F7F5F0;
  --color-white: #FFFFFF;
  --color-charcoal: #2C2C2C;
  --color-slate: #6B6B6B;
  --color-drift: #9A9A9A;
  --color-stone-blue: #5B7B8A;
  --color-stone-blue-50: #EEF3F5;
  --color-stone-blue-100: #D4E1E7;
  --color-stone-blue-200: #B0C8D2;
  --color-stone-blue-600: #4A6573;
  --color-stone-blue-700: #3A4F5C;
  --color-stone-blue-800: #2A3A44;
  --color-stone-blue-900: #1A252D;
  --color-umber: #A0785A;
  --color-umber-50: #F5F0EB;
  --color-umber-100: #E8DDD2;
  --color-umber-200: #D4C3B0;
  --color-umber-600: #866449;
  --color-deep-slate: #3A4F5C;
  --color-mist: #E2DFD8;
  --color-sage: #6B8F71;
  --color-terracotta: #C4553A;
  --color-ochre: #D4A04A;

  /* Semantic aliases */
  --color-bg: var(--color-limestone);
  --color-surface: var(--color-white);
  --color-text-primary: var(--color-charcoal);
  --color-text-secondary: var(--color-slate);
  --color-text-tertiary: var(--color-drift);
  --color-accent: var(--color-stone-blue);
  --color-accent-warm: var(--color-umber);
  --color-accent-hover: var(--color-stone-blue-600);
  --color-border: var(--color-mist);
  --color-focus-ring: var(--color-stone-blue-200);
  --color-success: var(--color-sage);
  --color-error: var(--color-terracotta);
  --color-warning: var(--color-ochre);

  /* ===========================
     TYPOGRAPHY
     =========================== */
  --font-display: "DM Serif Display", Georgia, "Times New Roman", serif;
  --font-body: "Inter", -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "Courier New", monospace;

  --text-display: clamp(2.5rem, 5vw + 1rem, 4rem);
  --text-h1: clamp(2rem, 4vw + 0.5rem, 3rem);
  --text-h2: clamp(1.625rem, 3vw + 0.5rem, 2.25rem);
  --text-h3: clamp(1.375rem, 2vw + 0.5rem, 1.75rem);
  --text-h4: 1.375rem;
  --text-body-lg: 1.125rem;
  --text-body: 1rem;
  --text-body-sm: 0.875rem;
  --text-caption: 0.75rem;

  --leading-tight: 1.1;
  --leading-snug: 1.25;
  --leading-normal: 1.7;
  --leading-relaxed: 1.8;

  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.02em;
  --tracking-wider: 0.06em;
  --tracking-widest: 0.12em;

  /* ===========================
     SPACING (8px unit scale)
     =========================== */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.5rem;    /* 24px */
  --space-6: 2rem;      /* 32px */
  --space-7: 3rem;      /* 48px */
  --space-8: 4rem;      /* 64px */
  --space-9: 6rem;      /* 96px */
  --space-10: 8rem;     /* 128px */
  --space-11: 10rem;    /* 160px */
  --space-12: 12.5rem;  /* 200px */

  --section-padding: clamp(4rem, 10vw, 8rem);
  --container-padding: clamp(1.25rem, 4vw, 3rem);

  /* ===========================
     LAYOUT
     =========================== */
  --container-max: 1200px;
  --container-narrow: 800px;
  --container-wide: 1400px;
  --grid-gap: clamp(1rem, 2vw, 2rem);

  /* ===========================
     BORDERS & RADII
     =========================== */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  --border-width: 1px;
  --border-color: var(--color-border);

  /* ===========================
     SHADOWS
     =========================== */
  --shadow-xs: 0 1px 2px rgba(44, 44, 44, 0.04);
  --shadow-sm: 0 2px 8px rgba(44, 44, 44, 0.06);
  --shadow-md: 0 4px 16px rgba(44, 44, 44, 0.08);
  --shadow-lg: 0 8px 32px rgba(44, 44, 44, 0.10);
  --shadow-xl: 0 16px 48px rgba(44, 44, 44, 0.12);

  /* ===========================
     TRANSITIONS
     =========================== */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-slower: 800ms;

  /* ===========================
     Z-INDEX SCALE
     =========================== */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;
}


/* =============================================================================
   3. BASE / GLOBAL STYLES
   ============================================================================= */

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: 400;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  line-height: var(--leading-normal);
}

/* Subtle linen/paper noise texture overlay for material warmth */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: url('../assets/images/noise-texture.png') repeat;
  opacity: 0.03;
  pointer-events: none;
  z-index: 9999;
  mix-blend-mode: multiply;
}

/* Selection highlight */
::selection {
  background: var(--color-stone-blue-200);
  color: var(--color-charcoal);
}

/* Focus visible outline -- global default */
:focus-visible {
  outline: 2px solid var(--color-stone-blue);
  outline-offset: 3px;
}


/* =============================================================================
   4. SKIP LINK
   Visually hidden until focused, then slides into view.
   ============================================================================= */

.skip-link {
  position: fixed;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10000;
  background: var(--color-stone-blue);
  color: var(--color-white);
  padding: 12px 24px;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-body-sm);
  font-weight: 600;
  text-decoration: none;
  transition: top var(--duration-normal) var(--ease-out);
}

.skip-link:focus {
  top: 0;
  outline: none;
}


/* =============================================================================
   5. CONTAINER & LAYOUT UTILITIES
   ============================================================================= */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.container--wide {
  max-width: var(--container-wide);
}

/* Section base */
.section {
  padding-block: var(--section-padding);
}


/* =============================================================================
   6. TYPOGRAPHY UTILITIES
   ============================================================================= */

/* Headings use DM Serif Display */
h1, h2, h3,
.h1, .h2, .h3 {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--color-charcoal);
  line-height: var(--leading-tight);
}

h1, .h1 {
  font-size: var(--text-h1);
  letter-spacing: -0.015em;
  line-height: 1.10;
}

h2, .h2 {
  font-size: var(--text-h2);
  letter-spacing: -0.01em;
  line-height: 1.15;
}

h3, .h3 {
  font-size: var(--text-h3);
  letter-spacing: -0.005em;
  line-height: 1.20;
}

h4, .h4 {
  font-family: var(--font-body);
  font-size: var(--text-h4);
  font-weight: 600;
  line-height: var(--leading-snug);
}

/* Prose container for body copy */
.prose {
  max-width: 68ch;
}

.prose p + p {
  margin-top: 1.25rem;
}

/* Text color utilities */
.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-accent { color: var(--color-accent); }
.text-white { color: var(--color-white); }


/* =============================================================================
   7. OVERLINE COMPONENT
   Umber rule + uppercase text pattern used across all section headers.
   ============================================================================= */

.overline {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-umber);
  margin-bottom: var(--space-4);
}

.overline-rule {
  display: inline-block;
  width: 32px;
  height: 2px;
  background: var(--color-umber);
  vertical-align: middle;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-slow) var(--ease-out);
}

.is-visible .overline-rule {
  transform: scaleX(1);
}

/* Centered overline variant (used in Services) */
.overline--center {
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.overline--center .overline-rule {
  transform-origin: center;
}

/* Light variant for dark backgrounds */
.overline--light {
  color: var(--color-umber);
}

.overline-rule--light {
  background: rgba(160, 120, 90, 0.6);
}

/* Section header pattern */
.section-header {
  margin-bottom: var(--space-7);
}

.section-header h2 {
  max-width: 20ch;
}

.section-header--center {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
}

.section-header--center .overline {
  justify-content: center;
}

.section-header--center h2 {
  max-width: none;
  margin-inline: auto;
}

.section-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-body-lg);
  font-weight: 400;
  line-height: var(--leading-normal);
  color: var(--color-text-secondary);
  max-width: 52ch;
  margin-top: var(--space-4);
}

.section-header--center .section-subtitle {
  margin-inline: auto;
}


/* =============================================================================
   8. BUTTON COMPONENTS
   Primary, Secondary, Ghost, WhatsApp variants + size modifiers.
   ============================================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition:
    background var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

/* Primary Button -- Stone Blue solid */
.btn-primary {
  height: 52px;
  padding: 0 32px;
  background: var(--color-stone-blue);
  color: var(--color-white);
  font-size: var(--text-body-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
}

.btn-primary:hover {
  background: var(--color-stone-blue-600);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-xs);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--color-stone-blue);
  outline-offset: 3px;
}

/* Secondary Button -- Outlined */
.btn-secondary {
  height: 52px;
  padding: 0 32px;
  background: transparent;
  color: var(--color-stone-blue);
  border: 1.5px solid var(--color-stone-blue);
  border-radius: var(--radius-sm);
  font-size: var(--text-body-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.btn-secondary:hover {
  background: var(--color-stone-blue-50);
  color: var(--color-stone-blue-600);
}

/* Ghost Button -- Text link with animated underline */
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  height: 40px;
  padding: 0 8px;
  background: none;
  border: none;
  color: var(--color-stone-blue);
  font-family: var(--font-body);
  font-size: var(--text-body-sm);
  font-weight: 500;
  text-decoration: none;
  position: relative;
  cursor: pointer;
}

.btn-ghost::after {
  content: "";
  position: absolute;
  bottom: 8px;
  left: 8px;
  right: 8px;
  height: 1px;
  background: var(--color-umber);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-normal) var(--ease-out);
}

.btn-ghost:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* WhatsApp Button */
.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  height: 44px;
  padding: 0 20px;
  background: transparent;
  color: #25D366;
  border: 1.5px solid #25D366;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-body-sm);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 200ms var(--ease-out);
}

.btn-whatsapp svg {
  display: inline-block;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn-whatsapp:hover {
  background: #25D366;
  color: var(--color-white);
}

/* Hero-specific button variants */
.btn-hero-primary {
  background: var(--color-white);
  color: var(--color-stone-blue);
  font-size: var(--text-body-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
}

.btn-hero-primary:hover {
  background: var(--color-stone-blue-50);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.btn-hero-ghost {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255, 255, 255, 0.4);
  font-size: var(--text-body-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
}

.btn-hero-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.7);
}

/* Button Sizes */
.btn--compact {
  height: 40px;
  padding: 0 24px;
  font-size: 0.8125rem;
}

.btn--sm {
  height: 36px;
  padding: 0 16px;
  font-size: 0.75rem;
}

.btn--lg {
  height: 56px;
  padding: 0 40px;
  font-size: var(--text-body-sm);
}

.btn--full {
  width: 100%;
}


/* =============================================================================
   9. FORM BASE STYLES
   ============================================================================= */

.form-label {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-body-sm);
  font-weight: 500;
  color: var(--color-charcoal);
  margin-bottom: var(--space-2);
}

.form-label .required {
  color: var(--color-terracotta);
  margin-left: 2px;
}

.form-input {
  width: 100%;
  height: 52px;
  padding: 0 16px;
  background: var(--color-white);
  border: 1.5px solid var(--color-mist);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-body);
  color: var(--color-charcoal);
  transition:
    border-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);
}

.form-input::placeholder {
  color: var(--color-drift);
}

.form-input:hover {
  border-color: var(--color-stone-blue-200);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-stone-blue);
  box-shadow: 0 0 0 3px var(--color-focus-ring);
}

.form-input[aria-invalid="true"] {
  border-color: var(--color-terracotta);
  box-shadow: 0 0 0 3px rgba(196, 85, 58, 0.12);
}

textarea.form-input {
  height: auto;
  min-height: 120px;
  padding: 16px;
  resize: vertical;
}


/* =============================================================================
   10. SCROLL REVEAL ANIMATION CLASSES
   GPU-compositable: uses only transform + opacity.
   Triggered by IntersectionObserver adding .is-visible.
   ============================================================================= */

/* Default entrance: fade up 24px */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--duration-slower) var(--ease-out),
    transform var(--duration-slower) var(--ease-out);
}

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

/* Staggered group entrance: children fade up with incremental delays */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--duration-slower) var(--ease-out),
    transform var(--duration-slower) var(--ease-out);
}

.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 100ms; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 200ms; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 300ms; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 400ms; }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 500ms; }

.reveal-stagger.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* Image reveal: scale from 1.08 down to 1 within overflow:hidden container */
.image-reveal {
  overflow: hidden;
}

.image-reveal img {
  transform: scale(1.08);
  transition: transform 1.2s var(--ease-out);
}

.image-reveal.is-visible img {
  transform: scale(1);
}


/* =============================================================================
   11. SCREEN READER ONLY UTILITY
   ============================================================================= */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}


/* =============================================================================
   12. NAVIGATION
   Fixed nav with transparent-on-hero / solid-on-scroll states.
   Base (scrolled) state defined here; transparent hero override in sections.css.
   ============================================================================= */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  height: 80px;
  background: rgba(247, 245, 240, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-mist);
  box-shadow: var(--shadow-xs);
  transition: height 300ms var(--ease-out), background 400ms var(--ease-out), border-color 400ms var(--ease-out), box-shadow 400ms var(--ease-out);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.site-nav__logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
  text-decoration: none;
  transition: transform 300ms var(--ease-out);
}

.site-nav__logo-name {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--color-charcoal);
  transition: color 400ms var(--ease-out);
}

.site-nav__logo-sub {
  font-family: var(--font-body);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-charcoal);
  transition: color 400ms var(--ease-out);
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: 40px;
}

.site-nav__link {
  position: relative;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-charcoal);
  text-decoration: none;
  padding-block: 4px;
  transition: color 200ms var(--ease-out);
}

.site-nav__link:hover { color: var(--color-stone-blue); }

/* Nav link ::after underline defined in sections.css (bottom: -6px, border-radius: 1px) */

/* Nav scrolled state */
.site-nav.is-scrolled {
  height: 64px;
}

.site-nav.is-scrolled .site-nav__logo {
  transform: scale(0.85);
  transform-origin: left center;
}

/* Hamburger */
.hamburger {
  display: none;
  width: 48px;
  height: 48px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  position: relative;
  z-index: calc(var(--z-overlay) + 1);
}

.hamburger__line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-charcoal);
  margin: 6px auto;
  transition: background 400ms var(--ease-out), transform 300ms var(--ease-out), opacity 300ms var(--ease-out);
}

.hamburger.is-active .hamburger__line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger.is-active .hamburger__line:nth-child(2) {
  opacity: 0;
}

.hamburger.is-active .hamburger__line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--color-limestone);
  z-index: var(--z-overlay);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  transform: translateX(100%);
  transition: transform 400ms var(--ease-out);
}

.mobile-menu.is-open {
  transform: translateX(0);
}

.mobile-menu__link {
  font-family: var(--font-display);
  font-size: 32px;
  color: var(--color-charcoal);
  text-decoration: none;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 500ms var(--ease-out), transform 500ms var(--ease-out);
}

.mobile-menu.is-open .mobile-menu__link {
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu.is-open .mobile-menu__link:nth-child(1) { transition-delay: 100ms; }
.mobile-menu.is-open .mobile-menu__link:nth-child(2) { transition-delay: 150ms; }
.mobile-menu.is-open .mobile-menu__link:nth-child(3) { transition-delay: 200ms; }
.mobile-menu.is-open .mobile-menu__link:nth-child(4) { transition-delay: 250ms; }
.mobile-menu.is-open .mobile-menu__link:nth-child(5) { transition-delay: 300ms; }

.mobile-menu__cta {
  position: absolute;
  bottom: 48px;
  left: 20px;
  right: 20px;
  opacity: 0;
  transition: opacity 500ms var(--ease-out) 400ms;
}

.mobile-menu.is-open .mobile-menu__cta {
  opacity: 1;
}

/* Nav CTA */
.site-nav__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 24px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-decoration: none;
  background: var(--color-stone-blue);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  transition: background 200ms var(--ease-out), transform 200ms var(--ease-out);
}

.site-nav__cta:hover {
  background: #4A6573;
  transform: translateY(-1px);
}

@media (max-width: 767px) {
  .site-nav { height: 64px; }
  .site-nav__links { display: none; }
  .site-nav__cta { display: none; }
  .hamburger { display: flex; flex-direction: column; align-items: center; justify-content: center; }
}


/* =============================================================================
   13. HERO SECTION
   Full viewport with background image, gradient overlay, centered content,
   staggered entrance animation via CSS keyframes.
   ============================================================================= */

.hero {
  position: relative;
  width: 100%;
  height: 100svh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  z-index: 0;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(170deg, rgba(26,37,45,0.20) 0%, rgba(26,37,45,0.40) 40%, rgba(26,37,45,0.60) 100%);
  z-index: 1;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 160px;
  background: linear-gradient(to bottom, rgba(0,0,0,0.25), transparent);
  z-index: 2;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 3;
  max-width: 800px;
  padding-inline: var(--container-padding);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__overline {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: rgba(255,255,255,0.75);
}

.hero__overline-rule {
  display: inline-block;
  width: 40px;
  height: 1px;
  background: rgba(255,255,255,0.3);
}

.hero__headline {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw + 1rem, 4rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: #FFFFFF;
  max-width: 14ch;
  margin-bottom: 24px;
}

.hero__subheadline {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 400;
  line-height: 1.65;
  color: rgba(255,255,255,0.80);
  max-width: 48ch;
  margin-bottom: 40px;
}

.hero__cta-group {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: center;
}

.hero__scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
}

.hero__scroll-mouse {
  width: 24px;
  height: 38px;
  border: 1.5px solid rgba(255,255,255,0.4);
  border-radius: 12px;
  position: relative;
}

.hero__scroll-dot {
  width: 3px;
  height: 3px;
  background: white;
  border-radius: 50%;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollDot 2s ease-in-out infinite;
}

@keyframes scrollDot {
  0%, 100% { top: 8px; opacity: 1; }
  50% { top: 24px; opacity: 0.3; }
}

/* Hero entrance animations */
@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-anim { opacity: 0; animation-fill-mode: both; }
.hero-anim--overline { animation: heroFadeUp 600ms var(--ease-out) 300ms both; }
.hero-anim--headline { animation: heroFadeUp 800ms var(--ease-out) 500ms both; }
.hero-anim--sub { animation: heroFadeUp 600ms var(--ease-out) 700ms both; }
.hero-anim--cta { animation: heroFadeUp 500ms var(--ease-out) 900ms both; }
.hero-anim--scroll { animation: heroFadeUp 400ms var(--ease-out) 1600ms both; }

@media (max-width: 767px) {
  .hero__headline { font-size: 2.5rem; max-width: none; }
  .hero__subheadline { font-size: 16px; }
  .hero__cta-group { flex-direction: column; width: 100%; }
  .hero__cta-group .btn { width: 100%; max-width: 320px; }
  .hero__overline-rule { width: 24px; }
  .hero__scroll-indicator { bottom: 24px; }
}


/* =============================================================================
   14. CONTACT CTA BANNER
   ============================================================================= */

.contact__cta-banner {
  margin-top: 80px;
  background: var(--color-stone-blue-50, #EDF1F3);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
}

.contact__cta-banner h3 {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  color: var(--color-charcoal);
  margin-bottom: 12px;
}

.contact__cta-banner p {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--color-slate);
  margin-bottom: 28px;
}

@media (max-width: 767px) {
  .contact__cta-banner {
    margin-top: 48px;
    padding: 32px 24px;
  }
}


/* =============================================================================
   15. FOOTER
   Dark background, 4-column grid, bottom bar.
   ============================================================================= */

.site-footer {
  background: #2C3A42;
  padding: 72px 0 32px;
  color: rgba(255,255,255,0.5);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.site-footer__logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
  text-decoration: none;
  margin-bottom: 16px;
}

.site-footer__logo-name {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.02em;
  color: rgba(255,255,255,0.85);
}

.site-footer__logo-sub {
  font-family: var(--font-body);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
}

.site-footer__tagline,
.site-footer__description {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255,255,255,0.5);
  max-width: 32ch;
}

.site-footer__heading {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.85);
  margin-bottom: 20px;
}

.site-footer__links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.site-footer__links a {
  font-family: var(--font-body);
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  transition: color 200ms var(--ease-out);
}

.site-footer__links a:hover {
  color: rgba(255,255,255,0.85);
}

.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.site-footer__contact li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.site-footer__contact li svg {
  flex-shrink: 0;
  display: inline-block;
}

.site-footer__contact a {
  font-family: var(--font-body);
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  transition: color 200ms var(--ease-out);
}

.site-footer__contact a:hover {
  color: rgba(255,255,255,0.85);
}

.site-footer__bottom {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-body);
  font-size: 13px;
  color: rgba(255,255,255,0.35);
}

@media (max-width: 1023px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .site-footer__tagline,
  .site-footer__description {
    max-width: none;
    margin-inline: auto;
  }
  .site-footer__bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}


/* =============================================================================
   16. REDUCED MOTION
   Respect user preferences. Disable all scroll animations.
   ============================================================================= */

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal-stagger > * {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .image-reveal img {
    transform: none;
    transition: none;
  }

  .overline-rule {
    transform: scaleX(1);
    transition: none;
  }

  .hero-anim {
    opacity: 1;
    animation: none;
  }

  .hero__scroll-dot {
    animation: none;
  }
}