/* ============================================
   Form & Finish Co. - Design System
   ============================================ */

/* CSS Variables - Brand Colors & Typography */
:root {
  /* Colors */
  --color-charcoal: #1C1C1C;
  --color-brass: #C19A4A;
  --color-stone: #E8E3D9;
  --color-white: #FFFFFF;

  /* Typography */
  --font-heading: 'Cormorant Garamond', 'Georgia', serif;
  --font-body: 'Lora', 'Georgia', serif;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --spacing-xxl: 8rem;

  /* Layout */
  --container-max: 1400px;
  --content-max: 800px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.6s ease;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
  width: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-charcoal);
  color: var(--color-stone);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  width: 100%;
  position: relative;
}

main {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  width: 100%;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-stone);
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  margin-bottom: var(--spacing-md);
  font-weight: 500;
  line-height: 1.2;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  color: var(--color-brass);
  font-weight: 600;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 600;
}

p {
  margin-bottom: var(--spacing-sm);
  font-size: clamp(1rem, 2vw, 1.125rem);
  line-height: 1.7;
  font-weight: 400;
}

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

/* ============================================
   Layout Components
   ============================================ */

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-narrow {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

section {
  padding: var(--spacing-xl) 0;
  overflow-x: hidden;
  width: 100%;
  max-width: 100vw;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  min-height: 150vh;
  margin: 0;
  padding: 0;
  position: relative;
}

.hero-image-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  z-index: -1;
  transition: opacity 0.3s ease-out;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: blur(8px);
  transform: scale(1.1);
  transition: none; /* Controlled by JS */
}

.hero-image-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg,
    rgba(28, 28, 28, 0.4) 0%,
    rgba(28, 28, 28, 0.7) 100%);
  opacity: 1;
  z-index: 1;
  pointer-events: none;
}

.hero-text-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  max-width: 1000px;
  width: 90%;
  opacity: 1;
  z-index: 2;
  pointer-events: none;
}

.hero-text-overlay h1 {
  font-size: clamp(3.5rem, 7vw, 6rem);
  margin-bottom: 1rem;
  font-weight: 300;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Handwritten animation effect */
.handwritten-title {
  position: relative;
  display: inline-block;
}

.handwritten-title .letter {
  display: inline-block;
  opacity: 0;
  animation: writeIn 0.2s ease-out forwards;
}

@keyframes writeIn {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-stone);
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin: 0 auto 1rem;
  opacity: 0.9;
}

.hero-tagline {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  color: var(--color-stone);
  font-weight: 300;
  font-style: italic;
  max-width: 700px;
  margin: 0 auto;
  opacity: 0.85;
}

/* Ornate Calligraphic Divider */
.ornate-divider {
  width: 100%;
  max-width: 500px;
  margin: 2rem auto 3rem;
  padding: 0 1rem;
}

.ornate-divider svg {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 1px 3px rgba(193, 154, 74, 0.25));
}

/* ============================================
   Before/After Split Screen
   ============================================ */

.before-after {
  position: relative;
  width: 100%;
  height: 80vh;
  min-height: 600px;
  overflow: hidden;
  margin: var(--spacing-xl) 0;
}

.before-after-container {
  position: relative;
  width: 100%;
  height: 100%;
  cursor: ew-resize;
  user-select: none;
  touch-action: pan-y; /* Allow vertical scrolling, prevent horizontal pan */
}

.before-after-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.before-after-image.after {
  clip-path: inset(0 100% 0 0); /* Start hidden, will swipe left to right */
}

.before-after-divider {
  position: absolute;
  top: 0;
  left: 50%;
  width: 4px;
  height: 100%;
  background-color: var(--color-brass);
  transform: translateX(-50%);
  z-index: 10;
  box-shadow: 0 0 20px rgba(193, 154, 74, 0.5);
  cursor: grab;
  transition: width 0.2s ease;
  touch-action: none; /* Allow the divider itself to be dragged in any direction */
}

.before-after-divider:hover {
  width: 6px;
}

.before-after-divider::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: 50px;
  height: 50px;
  background-color: var(--color-brass);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 4px 12px rgba(193, 154, 74, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
}

.before-after-divider::after {
  content: '⟨   ⟩';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  color: var(--color-charcoal);
  font-size: 20px;
  font-weight: bold;
  z-index: 1;
  letter-spacing: -4px;
  font-family: Arial, sans-serif;
}

/* Slider hint overlay */
.slider-hint {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(28, 28, 28, 0.85);
  color: var(--color-brass);
  padding: 1rem 2rem;
  border-radius: 4px;
  font-family: var(--font-heading);
  font-size: 1.125rem;
  pointer-events: none;
  z-index: 5;
  opacity: 1;
  transition: opacity 0.3s ease;
  border: 2px solid var(--color-brass);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.slider-hint::before {
  content: '← Drag to compare →';
}

/* ============================================
   Detail Grid Section
   ============================================ */

.detail-showcase {
  padding: 0;
  margin: 0;
  background-color: #1C1C1C;
  position: relative;
}

/* Ken Burns container */
.detail-ken-burns {
  position: relative;
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Image wrapper for Ken Burns effect */
.detail-image-wrapper {
  position: relative;
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background-color: #1C1C1C;
}

/* Ken Burns animation keyframes */
@keyframes kenBurns {
  0% {
    transform: translate(-50%, -50%) scale(1);
  }
  25% {
    transform: translate(-55%, -48%) scale(1.3);
  }
  50% {
    transform: translate(-45%, -52%) scale(1.5);
  }
  75% {
    transform: translate(-52%, -50%) scale(1.4);
  }
  100% {
    transform: translate(-50%, -50%) scale(1.2);
  }
}

/* Image that auto-plays Ken Burns animation */
.detail-image {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  will-change: transform;
  transform: translate(-50%, -50%);
}

/* Trigger animation when active */
.detail-ken-burns.active .detail-image {
  animation: kenBurns 24s ease-in-out forwards;
}

/* Text overlays for each stage */
.detail-text-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.8s ease;
  background: linear-gradient(
    180deg,
    rgba(28, 28, 28, 0) 0%,
    rgba(28, 28, 28, 0.7) 50%,
    rgba(28, 28, 28, 0) 100%
  );
}

.detail-text-overlay.active {
  opacity: 1;
}

.detail-text-content {
  text-align: center;
  padding: var(--spacing-lg);
  max-width: 700px;
  transform: translateY(30px);
  transition: transform 0.8s ease, opacity 0.8s ease;
  opacity: 0;
}

.detail-text-overlay.active .detail-text-content {
  transform: translateY(0);
  opacity: 1;
  transition-delay: 0.2s;
}

.detail-text-content h2,
.detail-text-content h3 {
  color: var(--color-brass);
  margin-bottom: var(--spacing-sm);
  font-family: var(--font-heading);
  font-weight: 400;
  letter-spacing: 0.02em;
}

.detail-text-content h2 {
  font-size: clamp(2rem, 5vw, 3rem);
}

.detail-text-content h3 {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
}

.detail-text-content p {
  color: var(--color-stone);
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 1.8;
  margin: 0;
}


.detail-annotation {
  position: absolute;
  opacity: 0;
}

.detail-annotation.visible {
  opacity: 1;
}

.detail-annotation[data-position="top-left"].visible .detail-dot {
  animation: fadeInDot 0.4s ease forwards;
}

.detail-annotation[data-position="top-right"].visible .detail-dot {
  animation: fadeInDot 0.4s ease forwards 0.2s;
}

.detail-annotation[data-position="bottom-left"].visible .detail-dot {
  animation: fadeInDot 0.4s ease forwards 0.4s;
}

.detail-annotation[data-position="top-left"].visible .detail-line {
  animation: drawLineHorizontal 0.6s ease forwards 0.4s;
}

.detail-annotation[data-position="top-right"].visible .detail-line {
  animation: drawLineHorizontalReverse 0.6s ease forwards 0.6s;
}

.detail-annotation[data-position="bottom-left"].visible .detail-line {
  animation: drawLineHorizontal 0.6s ease forwards 0.8s;
}

.detail-annotation[data-position="top-left"].visible .detail-text {
  animation: slideInLeft 0.5s ease forwards 0.8s;
}

.detail-annotation[data-position="top-right"].visible .detail-text {
  animation: slideInRight 0.5s ease forwards 1.0s;
}

.detail-annotation[data-position="bottom-left"].visible .detail-text {
  animation: slideInLeft 0.5s ease forwards 1.2s;
}

.detail-dot {
  width: 16px;
  height: 16px;
  background-color: var(--color-brass);
  border-radius: 50%;
  box-shadow: 0 0 20px rgba(193, 154, 74, 0.6);
  position: relative;
  cursor: pointer;
  opacity: 0;
  transform: scale(0);
}

.detail-annotation.visible .detail-dot {
  animation: fadeInDot 0.4s ease forwards, pulse 2s ease-in-out infinite 1s;
}

.detail-dot::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  background-color: var(--color-charcoal);
  border-radius: 50%;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 0 20px rgba(193, 154, 74, 0.6);
  }
  50% {
    transform: scale(1.2);
    box-shadow: 0 0 30px rgba(193, 154, 74, 0.8);
  }
}

.detail-line {
  position: absolute;
  background-color: var(--color-brass);
  opacity: 0;
  transform-origin: left center;
}

[data-position="top-left"] .detail-line {
  top: 8px;
  left: 16px;
  width: 80px;
  height: 2px;
}

[data-position="top-right"] .detail-line {
  top: 8px;
  right: 16px;
  width: 80px;
  height: 2px;
}

[data-position="bottom-left"] .detail-line {
  bottom: 8px;
  left: 16px;
  width: 80px;
  height: 2px;
}

.detail-text {
  position: absolute;
  background-color: rgba(28, 28, 28, 0.95);
  padding: var(--spacing-sm) var(--spacing-md);
  border-left: 3px solid var(--color-brass);
  min-width: 250px;
  max-width: 300px;
  backdrop-filter: blur(10px);
  opacity: 0;
  transform: translateX(-20px);
}

[data-position="top-left"] .detail-text {
  top: 8px;
  left: 100px;
}

[data-position="top-right"] .detail-text {
  top: 8px;
  right: 100px;
  text-align: right;
  border-left: none;
  border-right: 3px solid var(--color-brass);
  transform: translateX(20px);
}

[data-position="bottom-left"] .detail-text {
  bottom: 8px;
  left: 100px;
}

.detail-text h4 {
  color: var(--color-brass);
  font-size: 1.125rem;
  margin-bottom: 0.25rem;
  font-weight: 600;
}

.detail-text p {
  color: var(--color-stone);
  font-size: 0.875rem;
  margin: 0;
  opacity: 0.9;
  line-height: 1.5;
}

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

@keyframes drawLineHorizontal {
  from {
    opacity: 0;
    transform: scaleX(0);
  }
  to {
    opacity: 0.6;
    transform: scaleX(1);
  }
}

@keyframes drawLineHorizontalReverse {
  from {
    opacity: 0;
    transform: scaleX(0);
    transform-origin: right center;
  }
  to {
    opacity: 0.6;
    transform: scaleX(1);
    transform-origin: right center;
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Responsive adjustments for annotations */
@media (max-width: 768px) {
  .detail-text {
    min-width: 200px;
    max-width: 220px;
    padding: 0.75rem;
  }

  .detail-text h4 {
    font-size: 1rem;
  }

  .detail-text p {
    font-size: 0.8rem;
  }

  .detail-line {
    width: 50px !important;
  }

  [data-position="top-left"] .detail-text {
    left: 70px;
  }

  [data-position="top-right"] .detail-text {
    right: 70px;
  }

  [data-position="bottom-left"] .detail-text {
    left: 70px;
  }
}

/* ============================================
   Portfolio Grid
   ============================================ */

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.portfolio-item {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
  background-color: rgba(193, 154, 74, 0.1);
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.portfolio-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.portfolio-item:hover img {
  transform: scale(1.05);
}

/* ============================================
   Services Section
   ============================================ */

.services {
  background-color: rgba(232, 227, 217, 0.05);
  padding: var(--spacing-xxl) 0;
}

.services-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.service-item {
  position: relative;
  padding: var(--spacing-md);
  padding-top: calc(var(--spacing-md) + 2rem);
  border-left: 3px solid var(--color-brass);
  background-color: rgba(232, 227, 217, 0.02);
  transition: all 0.4s ease;
  opacity: 0;
  transform: translateY(30px);
}

.service-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.service-item:hover {
  background-color: rgba(232, 227, 217, 0.05);
  transform: translateY(-8px);
  box-shadow: 0 12px 30px rgba(193, 154, 74, 0.15);
  border-left-color: var(--color-stone);
}

.service-number {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-md);
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 300;
  color: var(--color-brass);
  opacity: 0;
  line-height: 1;
}

.service-item.visible .service-number {
  animation: countUp 0.8s ease forwards;
}

@keyframes countUp {
  0% {
    opacity: 0;
    transform: translateY(20px) scale(0.5);
  }
  60% {
    opacity: 0.3;
  }
  100% {
    opacity: 0.15;
    transform: translateY(0) scale(1);
  }
}

.service-item h3 {
  color: var(--color-brass);
  margin-bottom: var(--spacing-sm);
  transition: color 0.3s ease;
}

.service-item:hover h3 {
  color: var(--color-stone);
}

/* Why Hand Painting Box */
.why-hand-painting {
  margin-top: 4rem;
  padding: 3rem;
  background-color: rgba(193, 154, 74, 0.12);
  border-left: 4px solid var(--color-brass);
  opacity: 0;
  transform: translateY(40px) scale(0.98);
  transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.why-hand-painting.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Craft Grid with Rotating Backgrounds */
.craft-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.craft-box {
  position: relative;
  min-height: 400px;
  overflow: hidden;
  cursor: pointer;
  border-radius: 4px;
}

.craft-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  transition: transform 0.6s ease, opacity 1.5s ease;
  z-index: 1;
}

.craft-background-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  transition: transform 0.6s ease, opacity 1.5s ease;
  opacity: 0;
  z-index: 2;
}

.craft-box:hover .craft-background,
.craft-box:hover .craft-background-overlay {
  transform: scale(1.05);
}

.craft-content {
  position: relative;
  z-index: 3;
  padding: var(--spacing-lg);
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background: linear-gradient(
    to top,
    rgba(28, 28, 28, 0.75) 0%,
    rgba(28, 28, 28, 0.3) 50%,
    rgba(28, 28, 28, 0) 100%
  );
  transition: background 0.4s ease;
}

.craft-box:hover .craft-content {
  background: linear-gradient(
    to top,
    rgba(28, 28, 28, 0.85) 0%,
    rgba(28, 28, 28, 0.5) 50%,
    rgba(28, 28, 28, 0.1) 100%
  );
}

.craft-content h3 {
  color: var(--color-brass);
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  margin-bottom: var(--spacing-sm);
  font-family: var(--font-heading);
  font-weight: 400;
}

.craft-content p {
  color: var(--color-stone);
  font-size: clamp(0.9rem, 1.5vw, 1rem);
  line-height: 1.6;
  margin: 0;
}

@media (max-width: 968px) {
  .craft-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .craft-grid {
    grid-template-columns: 1fr;
  }

  .craft-box {
    min-height: 350px;
  }
}

/* ============================================
   Contact Form
   ============================================ */

.contact {
  padding: var(--spacing-xxl) 0;
}

.contact-form {
  max-width: 600px;
  margin: var(--spacing-lg) auto 0;
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  color: var(--color-brass);
  font-weight: 600;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-sm);
  background-color: rgba(232, 227, 217, 0.20);
  border: 1px solid rgba(193, 154, 74, 0.3);
  color: var(--color-stone);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-brass);
}

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

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-brass);
  color: var(--color-charcoal);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn:hover {
  background-color: var(--color-stone);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(193, 154, 74, 0.3);
}

.btn-primary {
  background-color: var(--color-brass);
  color: var(--color-charcoal);
}

/* Success/Error Messages */
.form-message {
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  border-radius: 4px;
  font-family: var(--font-body);
  font-size: 1rem;
  text-align: center;
  animation: slideDown 0.3s ease;
}

.form-message.success {
  background-color: rgba(76, 175, 80, 0.1);
  border: 2px solid rgba(76, 175, 80, 0.5);
  color: #4CAF50;
}

.form-message.error {
  background-color: rgba(244, 67, 54, 0.1);
  border: 2px solid rgba(244, 67, 54, 0.5);
  color: #F44336;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   Utility Classes
   ============================================ */

.text-center {
  text-align: center;
}

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

/* ============================================
   Animations
   ============================================ */

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

.fade-in-up {
  animation: fadeInUp 0.8s ease forwards;
}

/* Intro Section Styling */
.intro-lead {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  line-height: 1.7;
  color: var(--color-stone);
  font-weight: 300;
  max-width: 900px;
  margin: 0 auto 3rem;
}

.intro-divider {
  width: 60px;
  height: 2px;
  background: var(--color-brass);
  margin: 4rem auto;
}

.intro-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3rem;
  margin-top: 4rem;
  text-align: left;
}

.intro-feature h3 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  color: var(--color-brass);
  font-weight: 500;
  margin-bottom: 1rem;
  letter-spacing: 0.02em;
}

.intro-feature p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-stone);
  opacity: 0.9;
}

/* Intro Section Animations - Scroll-Linked Parallax */
.intro-section {
  position: relative;
  padding: 8rem 2rem !important;
}

.intro-heading {
  opacity: 0;
  transform: translateY(80px) scale(0.9);
  will-change: transform, opacity;
  transition: none; /* Controlled by JS for smooth scroll-linked animation */
  font-size: clamp(2.5rem, 5vw, 4rem) !important;
  font-weight: 400;
  letter-spacing: 0.02em;
  margin-bottom: 2rem !important;
}

.intro-text {
  opacity: 0;
  transform: translateY(50px);
  will-change: transform, opacity;
  transition: none; /* Controlled by JS for smooth scroll-linked animation */
}

/* Brass Underline Effect - Scroll-Linked */
.highlight-text {
  position: relative;
  display: inline-block;
  --underline-width: 0%;
  color: var(--color-brass);
  font-weight: 500;
  font-style: normal;
  padding-bottom: 4px;
}

.highlight-text::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: var(--underline-width);
  height: 3px;
  background: var(--color-brass);
  box-shadow: 0 2px 8px rgba(193, 154, 74, 0.5);
  border-radius: 1.5px;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
  :root {
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
  }

  /* Hero adjustments */
  .hero-text-overlay h1 {
    font-size: clamp(2.5rem, 10vw, 4rem);
  }

  .hero-subtitle {
    font-size: clamp(0.875rem, 3vw, 1rem);
    letter-spacing: 0.1em;
  }

  .hero-tagline {
    font-size: clamp(1rem, 4vw, 1.25rem);
  }

  /* Intro section */
  .intro-section {
    padding: 4rem 1.5rem !important;
  }

  .intro-heading {
    font-size: clamp(2rem, 8vw, 3rem) !important;
  }

  /* Before/After slider */
  .before-after {
    height: 60vh;
    min-height: 400px;
  }

  /* Portfolio grid */
  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }

  /* Services */
  .services-list {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .services {
    padding: var(--spacing-lg) 0;
  }

  /* Detail showcase */
  .detail-scroll-container {
    min-height: 400vh; /* Shorter on mobile: 100vh in + 200vh animation + 100vh out */
  }

  .detail-text-content {
    padding: var(--spacing-md);
  }

  /* Contact section */
  .contact {
    padding: var(--spacing-lg) 0;
  }

  .contact-form {
    margin: var(--spacing-md) auto 0;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 2.5rem;
  }

  /* Typography */
  h1 {
    font-size: clamp(2rem, 8vw, 2.5rem);
  }

  h2 {
    font-size: clamp(1.75rem, 7vw, 2.25rem);
  }

  h3 {
    font-size: clamp(1.25rem, 5vw, 1.75rem);
  }

  p {
    font-size: clamp(0.9rem, 3.5vw, 1rem);
  }

  /* Containers */
  .container, .container-narrow {
    padding: 0 1rem;
  }

  /* Hero */
  .hero-text-overlay {
    width: 95%;
  }

  .hero-text-overlay h1 {
    font-size: clamp(2rem, 9vw, 3rem);
    letter-spacing: 0.02em;
  }

  /* Intro section */
  .intro-section {
    padding: 3rem 1rem !important;
  }

  /* Before/After */
  .before-after {
    height: 50vh;
    min-height: 300px;
    margin: var(--spacing-md) 0;
  }

  .slider-hint {
    font-size: 0.875rem;
    padding: 0.75rem 1.5rem;
  }

  /* Services section */
  .service-item {
    padding: var(--spacing-sm);
  }

  /* Form */
  .form-group {
    margin-bottom: var(--spacing-sm);
  }

  .form-group input,
  .form-group textarea {
    padding: 0.75rem;
    font-size: 1rem;
  }

  .btn {
    padding: 0.75rem var(--spacing-md);
    width: 100%;
  }
}