/* ==========================================================================
   ConcreteCraft — styles.css
   Mobile-first, BEM naming convention
   Base unit: 8px | Breakpoints: 768px (tablet), 1280px (desktop)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Colors */
  --color-dark:       #2C2C2C;
  --color-mid:        #5A5A5A;
  --color-light-bg:   #E8E4DF;
  --color-accent:     #C8A96E;
  --color-white:      #FFFFFF;
  --color-off-white:  #F5F2EE;
  --color-border:     #D4CFC9;

  /* Typography */
  --font-body:        'Inter', system-ui, sans-serif;
  --font-heading:     'Playfair Display', Georgia, serif;
  --font-size-base:   16px;

  /* Spacing (8px base unit) */
  --space-1:  8px;
  --space-2:  16px;
  --space-3:  24px;
  --space-4:  32px;
  --space-6:  48px;
  --space-8:  64px;
  --space-12: 96px;

  /* Layout */
  --container-max:    1200px;
  --nav-height:       72px;

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

  /* Shadows */
  --shadow-card:      0 2px 16px rgba(44, 44, 44, 0.10);
  --shadow-card-hover: 0 6px 32px rgba(44, 44, 44, 0.18);
  --shadow-nav:       0 2px 12px rgba(44, 44, 44, 0.12);
}

/* --------------------------------------------------------------------------
   2. Reset & Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--color-dark);
  background-color: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

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

address {
  font-style: normal;
}

/* --------------------------------------------------------------------------
   3. Typography Scale
   -------------------------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.2;
  color: var(--color-dark);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.125rem; }

@media (min-width: 768px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  h3 { font-size: 1.25rem; }
}

@media (min-width: 1280px) {
  h1 { font-size: 3rem; }
}

/* --------------------------------------------------------------------------
   4. Utility Classes
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-2);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-4);
  }
}

.section-heading {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  color: var(--color-dark);
  text-align: center;
  margin-bottom: var(--space-2);
}

@media (min-width: 768px) {
  .section-heading {
    font-size: 2rem;
  }
}

.section-subheading {
  font-size: 1rem;
  color: var(--color-mid);
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-6);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   5. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 12px var(--space-3);
  border-radius: 4px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  text-align: center;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-dark);
  border: 2px solid var(--color-accent);
}

.btn--primary:hover {
  background-color: #b8954f;
  border-color: #b8954f;
}

.btn--outline {
  background-color: transparent;
  color: var(--color-white);
  border: 2px solid var(--color-white);
}

.btn--outline:hover {
  background-color: var(--color-white);
  color: var(--color-dark);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn--ghost:hover {
  background-color: var(--color-accent);
  color: var(--color-dark);
}

.btn--large {
  padding: 16px var(--space-4);
  font-size: 1rem;
}

/* --------------------------------------------------------------------------
   6. Navigation
   -------------------------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--color-dark);
  box-shadow: var(--shadow-nav);
  height: var(--nav-height);
}

.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-2);
}

@media (min-width: 768px) {
  .nav__container {
    padding-inline: var(--space-4);
  }
}

.nav__logo {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.nav__logo:hover {
  color: var(--color-white);
}

/* Hamburger */
.nav__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: var(--space-1);
  border-radius: 4px;
  transition: background-color var(--transition-fast);
}

.nav__hamburger:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

.nav__hamburger-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
  transform-origin: center;
}

/* Hamburger open state */
.nav__hamburger--open .nav__hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger--open .nav__hamburger-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__hamburger--open .nav__hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.nav__menu {
  display: none;
  position: absolute;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background-color: var(--color-dark);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: var(--space-2) 0;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.nav__menu--open {
  display: block;
}

.nav__list {
  display: flex;
  flex-direction: column;
}

.nav__link {
  display: block;
  padding: 12px var(--space-3);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.9375rem;
  font-weight: 400;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav__link:hover {
  color: var(--color-accent);
  background-color: rgba(255, 255, 255, 0.04);
}

.nav__link--cta {
  color: var(--color-accent);
  font-weight: 600;
}

.nav__link--cta:hover {
  color: var(--color-white);
}

/* Desktop nav */
@media (min-width: 768px) {
  .nav__hamburger {
    display: none;
  }

  .nav__menu {
    display: block;
    position: static;
    background: none;
    border: none;
    padding: 0;
    box-shadow: none;
  }

  .nav__list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-1);
  }

  .nav__link {
    padding: 8px var(--space-2);
    border-radius: 4px;
  }

  .nav__link--cta {
    padding: 8px var(--space-2);
    border: 1px solid var(--color-accent);
    border-radius: 4px;
  }

  .nav__link--cta:hover {
    background-color: var(--color-accent);
    color: var(--color-dark);
  }
}

/* --------------------------------------------------------------------------
   7. Hero Section
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100svh;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero__backdrop {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    135deg,
    rgba(44, 44, 44, 0.82) 0%,
    rgba(44, 44, 44, 0.60) 60%,
    rgba(90, 90, 90, 0.45) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: var(--space-6) var(--space-2);
  max-width: 800px;
}

.hero__headline {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  color: var(--color-white);
  line-height: 1.15;
  margin-bottom: var(--space-3);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

@media (min-width: 768px) {
  .hero__headline {
    font-size: 3rem;
  }
}

@media (min-width: 1280px) {
  .hero__headline {
    font-size: 3.75rem;
  }
}

.hero__description {
  font-size: 1.0625rem;
  color: rgba(255, 255, 255, 0.88);
  max-width: 560px;
  margin-inline: auto;
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

@media (min-width: 768px) {
  .hero__description {
    font-size: 1.1875rem;
  }
}

.hero__actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

@media (min-width: 480px) {
  .hero__actions {
    flex-direction: row;
    justify-content: center;
  }
}

/* --------------------------------------------------------------------------
   8. Process Section
   -------------------------------------------------------------------------- */
.process {
  background-color: var(--color-white);
  padding: var(--space-8) 0;
}

.process__steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  counter-reset: steps;
}

@media (min-width: 768px) {
  .process__steps {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1280px) {
  .process__steps {
    grid-template-columns: repeat(5, 1fr);
  }
}

.process__step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-3);
  border-radius: 8px;
  background-color: var(--color-off-white);
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

.process__icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-1);
  line-height: 1;
}

.process__number {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-1);
}

.process__title {
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  color: var(--color-dark);
  margin-bottom: var(--space-1);
}

.process__desc {
  font-size: 0.875rem;
  color: var(--color-mid);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   9. Products Section
   -------------------------------------------------------------------------- */
.products {
  background-color: var(--color-light-bg);
  padding: var(--space-8) 0;
}

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

@media (min-width: 768px) {
  .products__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1280px) {
  .products__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.product-card {
  background-color: var(--color-white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.product-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.product-card__image-wrap {
  overflow: hidden;
  aspect-ratio: 3 / 2;
}

.product-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.product-card:hover .product-card__image {
  transform: scale(1.04);
}

.product-card__body {
  padding: var(--space-3);
}

.product-card__title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  color: var(--color-dark);
  margin-bottom: var(--space-1);
}

.product-card__desc {
  font-size: 0.875rem;
  color: var(--color-mid);
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   10. Services Section
   -------------------------------------------------------------------------- */
.services {
  background-color: var(--color-off-white);
  padding: var(--space-8) 0;
}

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

@media (min-width: 768px) {
  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1280px) {
  .services__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.services__card {
  background-color: var(--color-white);
  border-radius: 8px;
  padding: var(--space-4);
  border-left: 4px solid var(--color-accent);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

.services__icon {
  font-size: 2rem;
  margin-bottom: var(--space-2);
  line-height: 1;
}

.services__title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  color: var(--color-dark);
  margin-bottom: var(--space-1);
}

.services__desc {
  font-size: 0.9375rem;
  color: var(--color-mid);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   11. Gallery Section
   -------------------------------------------------------------------------- */
.gallery {
  background-color: var(--color-light-bg);
  padding: var(--space-8) 0;
}

.gallery__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
}

@media (min-width: 768px) {
  .gallery__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1280px) {
  .gallery__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.gallery__item {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border-radius: 6px;
  cursor: pointer;
  padding: 0;
  aspect-ratio: 4 / 3;
  background-color: var(--color-border);
}

.gallery__item:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.gallery__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.gallery__item:hover .gallery__image {
  transform: scale(1.06);
}

.gallery__caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-2) var(--space-2);
  background: linear-gradient(transparent, rgba(44, 44, 44, 0.80));
  color: var(--color-white);
  font-size: 0.875rem;
  font-weight: 600;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.gallery__item:hover .gallery__caption,
.gallery__item:focus-visible .gallery__caption {
  opacity: 1;
  transform: translateY(0);
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2);
}

.lightbox[hidden] {
  display: none;
}

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(20, 20, 20, 0.92);
  cursor: pointer;
}

.lightbox__content {
  position: relative;
  z-index: 1;
  max-width: min(90vw, 1100px);
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox__image {
  display: block;
  max-width: 100%;
  max-height: 85vh;
  border-radius: 6px;
  box-shadow: 0 8px 48px rgba(0, 0, 0, 0.6);
  object-fit: contain;
}

.lightbox__close {
  position: absolute;
  top: -48px;
  right: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.12);
  color: var(--color-white);
  font-size: 1.5rem;
  border-radius: 50%;
  transition: background-color var(--transition-fast);
  line-height: 1;
}

.lightbox__close:hover {
  background-color: rgba(255, 255, 255, 0.25);
}

.lightbox__close:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   12. Testimonials Section
   -------------------------------------------------------------------------- */
.testimonials {
  background-color: var(--color-dark);
  padding: var(--space-8) 0;
}

.testimonials .section-heading {
  color: var(--color-white);
}

.testimonials .section-subheading {
  color: rgba(255, 255, 255, 0.65);
}

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

@media (min-width: 768px) {
  .testimonials__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1280px) {
  .testimonials__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.testimonial-card {
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 8px;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.testimonial-card:hover {
  background-color: rgba(255, 255, 255, 0.09);
  border-color: rgba(200, 169, 110, 0.35);
}

.testimonial-card__stars {
  color: var(--color-accent);
  font-size: 1rem;
  letter-spacing: 2px;
}

.testimonial-card__quote {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.75;
  flex: 1;
}

.testimonial-card__quote::before {
  content: '\201C';
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--color-accent);
  line-height: 0;
  vertical-align: -0.5rem;
  margin-right: 2px;
}

.testimonial-card__footer {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-top: var(--space-2);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.testimonial-card__author {
  font-style: normal;
  font-weight: 600;
  color: var(--color-white);
  font-size: 0.9375rem;
}

.testimonial-card__location {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.45);
}

/* --------------------------------------------------------------------------
   13. CTA Section
   -------------------------------------------------------------------------- */
.cta-section {
  background-color: var(--color-accent);
  padding: var(--space-8) 0;
}

.cta-section__inner {
  text-align: center;
  max-width: 720px;
  margin-inline: auto;
}

.cta-section__heading {
  font-family: var(--font-heading);
  font-size: 1.875rem;
  color: var(--color-dark);
  margin-bottom: var(--space-2);
}

@media (min-width: 768px) {
  .cta-section__heading {
    font-size: 2.25rem;
  }
}

.cta-section__subtext {
  font-size: 1rem;
  color: rgba(44, 44, 44, 0.78);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

.cta-section__actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

@media (min-width: 480px) {
  .cta-section__actions {
    flex-direction: row;
    justify-content: center;
  }
}

.cta-section .btn--primary {
  background-color: var(--color-dark);
  border-color: var(--color-dark);
  color: var(--color-white);
}

.cta-section .btn--primary:hover {
  background-color: #1a1a1a;
  border-color: #1a1a1a;
}

.cta-section .btn--ghost {
  border-color: var(--color-dark);
  color: var(--color-dark);
}

.cta-section .btn--ghost:hover {
  background-color: var(--color-dark);
  color: var(--color-white);
}

.cta-section__phone-icon {
  font-size: 1rem;
}

/* --------------------------------------------------------------------------
   14. Footer
   -------------------------------------------------------------------------- */
.footer {
  background-color: var(--color-dark);
  color: rgba(255, 255, 255, 0.70);
  padding: var(--space-8) 0 0;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  padding-bottom: var(--space-6);
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-8);
  }
}

.footer__logo {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 1.375rem;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.footer__logo:hover {
  color: var(--color-white);
}

.footer__tagline {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.55);
  max-width: 320px;
}

.footer__nav-heading {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.footer__nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.footer__nav-link {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition-fast);
}

.footer__nav-link:hover {
  color: var(--color-white);
}

.footer__address {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.6;
}

.footer__contact-link {
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition-fast);
}

.footer__contact-link:hover {
  color: var(--color-white);
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-3) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
}

@media (min-width: 768px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer__copyright {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.40);
}

.footer__policy-link {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.40);
  transition: color var(--transition-fast);
}

.footer__policy-link:hover {
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   15. Scroll offset for fixed nav
   -------------------------------------------------------------------------- */
section[id],
header[id] {
  scroll-margin-top: var(--nav-height);
}

/* --------------------------------------------------------------------------
   16. Focus Visible (Accessibility)
   -------------------------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   17. Reduced Motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}