/* ============================================================
   匠心裝修工程 - 香港家居翻新專家
   Warm Industrial Palette | Outfit Display | System Body
   Dials: VARIANCE=6 MOTION=4 DENSITY=4
   ============================================================ */

/* --- FONTS --- */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&display=swap');

/* --- CSS VARIABLES --- */
:root {
  /* Warm industrial palette - no beige/cream */
  --color-bg: #f8f7f5;
  --color-surface: #ffffff;
  --color-surface-alt: #f0eeec;
  --color-accent: #c2410c;
  --color-accent-hover: #9a3412;
  --color-accent-light: #fff7ed;
  --color-text: #1c1917;
  --color-text-secondary: #78716c;
  --color-text-muted: #a8a29e;
  --color-border: #e7e5e4;
  --color-border-light: #f0eeec;
  --color-dark: #292524;
  --color-success: #15803d;

  /* Typography */
  --font-display: 'Outfit', system-ui, -apple-system, sans-serif;
  --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;

  /* Spacing scale (8px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Corner radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(28, 25, 23, 0.06);
  --shadow-md: 0 4px 12px rgba(28, 25, 23, 0.08);
  --shadow-lg: 0 12px 32px rgba(28, 25, 23, 0.10);

  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-base: 250ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --max-width: 1280px;
  --nav-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

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

/* --- TYPOGRAPHY --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

h1 {
  font-size: clamp(2.25rem, 1.5rem + 3.5vw, 3.75rem);
  line-height: 1.08;
}

h2 {
  font-size: clamp(1.75rem, 1.2rem + 2.5vw, 2.75rem);
}

h3 {
  font-size: clamp(1.25rem, 1rem + 1.5vw, 1.5rem);
}

.section-eyebrow {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

/* --- LAYOUT UTILITIES --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-20) 0;
}

.section-sm {
  padding: var(--space-12) 0;
}

.section-lg {
  padding: var(--space-24) 0;
}

@media (max-width: 768px) {
  .section { padding: var(--space-12) 0; }
  .section-lg { padding: var(--space-16) 0; }
}

/* --- NAVIGATION --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-links a {
  font-size: 0.938rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
}

.nav-cta {
  background: var(--color-accent);
  color: white !important;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-weight: 600 !important;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.nav-cta:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

.nav-cta:active {
  transform: translateY(0) scale(0.98);
}

.nav-cta::after { display: none !important; }

/* Mobile nav */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: var(--space-6);
    gap: var(--space-4);
    border-bottom: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-cta { display: inline-block; text-align: center; width: 100%; }
}

/* --- HERO --- */
.hero {
  padding-top: calc(var(--nav-height) + var(--space-16));
  padding-bottom: var(--space-16);
  min-height: auto;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.hero-content {
  max-width: 560px;
}

.hero-eyebrow {
  font-family: var(--font-display);
  font-size: 0.813rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 2rem + 4vw, 4rem);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
  color: var(--color-text);
}

.hero-title span {
  color: var(--color-accent);
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--color-surface-alt);
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(28, 25, 23, 0.06);
  border-radius: inherit;
  pointer-events: none;
}

/* Hero stats row */
.hero-stats {
  display: flex;
  gap: var(--space-8);
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-light);
}

.hero-stat {
  display: flex;
  flex-direction: column;
}

.hero-stat-value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
}

.hero-stat-label {
  font-size: 0.813rem;
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .hero-content { max-width: 100%; }
  .hero-visual { aspect-ratio: 16/10; }
  .hero-stats { gap: var(--space-6); }
  .hero { padding-top: calc(var(--nav-height) + var(--space-8)); }
}

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-display);
  font-size: 0.938rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  white-space: nowrap;
  line-height: 1.4;
}

.btn:active {
  transform: translateY(1px) scale(0.98);
}

.btn-primary {
  background: var(--color-accent);
  color: white;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 4px 16px rgba(194, 65, 12, 0.25);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-text);
  background: var(--color-surface-alt);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: 1rem;
}

/* --- CARDS --- */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-body {
  padding: var(--space-6);
}

/* --- SERVICE CARDS --- */
.service-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  padding: var(--space-8);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.service-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  font-size: 1.25rem;
  color: var(--color-accent);
}

.service-card h3 {
  margin-bottom: var(--space-2);
}

.service-card p {
  color: var(--color-text-secondary);
  font-size: 0.938rem;
  line-height: 1.65;
  margin-bottom: var(--space-4);
}

.service-card-price {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
}

.service-card-price span {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

/* --- GRID LAYOUTS --- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* --- SECTION HEADERS --- */
.section-header {
  margin-bottom: var(--space-12);
  max-width: 640px;
}

.section-header.centered {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  color: var(--color-text-secondary);
  font-size: 1.063rem;
  line-height: 1.7;
}

@media (max-width: 768px) {
  .section-header {
    margin-bottom: var(--space-8);
  }
}

/* --- STATS BAR --- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  padding: var(--space-12) 0;
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

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

.stat-value {
  font-family: var(--font-display);
  font-size: clamp(2rem, 1.5rem + 2.5vw, 3rem);
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.938rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-2);
}

@media (max-width: 640px) {
  .stats-bar {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

/* --- GALLERY --- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-alt);
  aspect-ratio: 4/3;
}

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

.gallery-item:hover img {
  transform: scale(1.03);
}

.gallery-label {
  position: absolute;
  bottom: var(--space-3);
  left: var(--space-3);
  background: rgba(28, 25, 23, 0.85);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  letter-spacing: 0.04em;
}

/* Before/After slider style */
.before-after {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.before-after-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-alt);
  aspect-ratio: 4/3;
  position: relative;
}

.before-after-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.before-after-badge {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.badge-before {
  background: var(--color-text);
  color: white;
}

.badge-after {
  background: var(--color-accent);
  color: white;
}

@media (max-width: 768px) {
  .gallery-grid { grid-template-columns: 1fr; }
  .before-after { grid-template-columns: 1fr; }
}

/* --- TESTIMONIAL --- */
.testimonial-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  padding: var(--space-8);
}

.testimonial-card blockquote {
  font-size: 1.063rem;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  font-style: italic;
}

.testimonial-card blockquote::before {
  content: '\201C';
  font-family: var(--font-display);
  font-size: 2.5rem;
  line-height: 1;
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--space-2);
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-surface-alt);
  overflow: hidden;
}

.testimonial-name {
  font-weight: 600;
  font-size: 0.938rem;
}

.testimonial-role {
  font-size: 0.813rem;
  color: var(--color-text-muted);
}

/* --- CTA BANNER --- */
.cta-banner {
  background: var(--color-dark);
  color: white;
  border-radius: var(--radius-xl);
  padding: var(--space-12) var(--space-8);
  text-align: center;
}

.cta-banner h2 {
  color: white;
  margin-bottom: var(--space-3);
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-8);
  font-size: 1.063rem;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* --- ABOUT PAGE --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--color-surface-alt);
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; }
}

/* Values */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.value-card {
  text-align: center;
  padding: var(--space-8) var(--space-6);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
}

.value-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--color-accent-light);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-4);
}

.value-card h3 {
  margin-bottom: var(--space-2);
}

.value-card p {
  color: var(--color-text-secondary);
  font-size: 0.938rem;
  line-height: 1.65;
}

@media (max-width: 768px) {
  .values-grid { grid-template-columns: 1fr; }
}

/* --- CONTACT --- */
.contact-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: var(--space-12);
}

.contact-form {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  padding: var(--space-8);
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: 0.938rem;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(194, 65, 12, 0.1);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-info-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.contact-info-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.contact-info-item h4 {
  font-size: 0.938rem;
  margin-bottom: var(--space-1);
}

.contact-info-item p {
  color: var(--color-text-secondary);
  font-size: 0.938rem;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; }
}

/* --- FOOTER --- */
.footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: white;
  margin-bottom: var(--space-4);
}

.footer-desc {
  font-size: 0.938rem;
  line-height: 1.7;
  max-width: 320px;
}

.footer h4 {
  color: white;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  font-size: 0.938rem;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.813rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }
}

/* --- UTILITIES --- */
.text-accent { color: var(--color-accent); }
.text-muted { color: var(--color-text-secondary); }
.text-center { text-align: center; }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

/* --- REDUCED MOTION --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* --- FOCUS --- */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* --- PLACEHOLDER IMAGES --- */
.img-placeholder {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: linear-gradient(135deg, #e7e5e4 0%, #d6d3d1 50%, #e7e5e4 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.813rem;
}