/* ========================================
   Les Eco-Constructeurs - Main Stylesheet
   Mobile-first responsive design
   ======================================== */

/* ----------------------------------------
   1. CSS Variables
   ---------------------------------------- */
:root {
  /* Colors */
  --color-primary: #B85C38;
  --color-primary-dark: #8B4429;
  --color-secondary: #5C8A4D;
  --color-earth: #D4A574;
  --color-cream: #FAF6F1;
  --color-white: #FFFFFF;
  --color-text: #3D3D3D;
  --color-text-light: #6B6B6B;

  /* Typography */
  --font-heading: 'DM Serif Display', Georgia, serif;
  --font-body: 'Nunito', 'Segoe UI', sans-serif;

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

  /* Other */
  --radius: 8px;
  --transition: 0.3s ease;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  --container-max: 1200px;
}

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

html {
  font-size: 16px;
  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-color: var(--color-white);
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-dark);
}

ul,
ol {
  list-style: none;
}

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

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

/* ----------------------------------------
   3. Typography
   ---------------------------------------- */
h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.75rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--spacing-sm);
}

p:last-child {
  margin-bottom: 0;
}

/* Tablet typography */
@media (min-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }

  h3 {
    font-size: 1.75rem;
  }

  h4 {
    font-size: 1.5rem;
  }
}

/* Desktop typography */
@media (min-width: 1024px) {
  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.875rem;
  }

  h4 {
    font-size: 1.625rem;
  }
}

/* ----------------------------------------
   4. Layout
   ---------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }
}

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

.section--cream {
  background-color: var(--color-cream);
}

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

@media (min-width: 768px) {
  .section {
    padding: var(--spacing-xl) 0;
  }
}

/* ----------------------------------------
   5. Header
   ---------------------------------------- */
.header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--color-white);
  box-shadow: var(--shadow);
  z-index: 1000;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
  min-height: 70px;
}

.header__logo {
  display: flex;
  align-items: center;
  z-index: 1001;
}

.header__logo img {
  height: 50px;
  width: auto;
}

/* Hamburger Menu Toggle */
.header__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  z-index: 1001;
  cursor: pointer;
}

.header__toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

.header__toggle-bar:nth-child(1) {
  transform: translateY(-6px);
}

.header__toggle-bar:nth-child(3) {
  transform: translateY(6px);
}

/* Hamburger active state */
.header__toggle.is-active .header__toggle-bar:nth-child(1) {
  transform: translateY(0) rotate(45deg);
}

.header__toggle.is-active .header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.header__toggle.is-active .header__toggle-bar:nth-child(3) {
  transform: translateY(0) rotate(-45deg);
}

/* Mobile Navigation Overlay */
.header__overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
  z-index: 999;
}

.header__overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

/* Mobile Navigation */
.header__nav {
  position: fixed;
  top: 0;
  right: 0;
  width: 80%;
  max-width: 320px;
  height: 100%;
  background-color: var(--color-white);
  padding: 100px var(--spacing-md) var(--spacing-md);
  transform: translateX(100%);
  transition: transform var(--transition);
  overflow-y: auto;
  z-index: 1000;
}

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

.header__nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.header__nav-item {
  border-bottom: 1px solid var(--color-cream);
}

.header__nav-link {
  display: block;
  padding: var(--spacing-sm);
  color: var(--color-text);
  font-weight: 600;
  transition: color var(--transition), background-color var(--transition);
}

.header__nav-link:hover,
.header__nav-link.is-active {
  color: var(--color-primary);
  background-color: var(--color-cream);
}

/* Desktop Navigation */
@media (min-width: 1024px) {
  .header__toggle {
    display: none;
  }

  .header__overlay {
    display: none;
  }

  .header__nav {
    position: static;
    width: auto;
    max-width: none;
    height: auto;
    background-color: transparent;
    padding: 0;
    transform: none;
    overflow: visible;
  }

  .header__nav-list {
    flex-direction: row;
    gap: var(--spacing-xs);
  }

  .header__nav-item {
    border-bottom: none;
  }

  .header__nav-link {
    position: relative;
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: transparent;
  }

  .header__nav-link:hover,
  .header__nav-link.is-active {
    background-color: transparent;
  }

  /* Underline animation */
  .header__nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transform: translateX(-50%);
    transition: width var(--transition);
  }

  .header__nav-link:hover::after,
  .header__nav-link.is-active::after {
    width: 80%;
  }
}

/* ----------------------------------------
   6. Hero / Slider (Swiper)
   ---------------------------------------- */
.hero {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.hero__slider {
  width: 100%;
}

.hero__slide {
  position: relative;
  width: 100%;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.hero__slide-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.5));
}

.hero__slide-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--spacing-md);
  color: var(--color-white);
}

.hero__slide-title {
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero__slide-text {
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto var(--spacing-md);
}

/* Swiper specific styles */
.swiper {
  width: 100%;
  height: 100%;
}

.swiper-slide {
  display: flex;
  align-items: center;
  justify-content: center;
}

.swiper-pagination-bullet {
  background-color: var(--color-white);
  opacity: 0.6;
}

.swiper-pagination-bullet-active {
  background-color: var(--color-primary);
  opacity: 1;
}

.swiper-button-prev,
.swiper-button-next {
  color: var(--color-white);
  opacity: 0.8;
  transition: opacity var(--transition);
}

.swiper-button-prev:hover,
.swiper-button-next:hover {
  opacity: 1;
}

@media (min-width: 768px) {
  .hero__slide {
    min-height: 450px;
  }

  .hero__slide-text {
    font-size: 1.25rem;
  }
}

@media (min-width: 1024px) {
  .hero__slide {
    min-height: 550px;
  }
}

/* ----------------------------------------
   7. Presentation Section
   ---------------------------------------- */
.presentation {
  padding: var(--spacing-lg) 0;
}

.presentation__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.presentation__image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.presentation__image img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.presentation__slider {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.presentation__slider .swiper-slide img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.presentation__content {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.presentation__title {
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.presentation__text {
  color: var(--color-text-light);
}

@media (min-width: 768px) {
  .presentation__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
  }

  .presentation--reverse .presentation__image,
  .presentation--reverse .presentation__slider {
    order: 2;
  }

  .presentation--reverse .presentation__content {
    order: 1;
  }
}

/* ----------------------------------------
   8. Submenu (Horizontal Scrollable)
   ---------------------------------------- */
.submenu {
  background-color: var(--color-cream);
  padding: var(--spacing-sm) 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.submenu::-webkit-scrollbar {
  display: none;
}

.submenu__list {
  display: flex;
  gap: var(--spacing-xs);
  padding: 0 var(--spacing-sm);
  white-space: nowrap;
  min-width: min-content;
}

.submenu__item {
  flex-shrink: 0;
}

.submenu__link {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--color-text);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: color var(--transition), background-color var(--transition);
}

.submenu__link:hover,
.submenu__link.is-active {
  color: var(--color-primary);
  background-color: var(--color-white);
}

@media (min-width: 768px) {
  .submenu {
    overflow-x: visible;
  }

  .submenu__list {
    justify-content: center;
    flex-wrap: wrap;
    padding: 0;
  }

  .submenu__link {
    font-size: 1rem;
  }
}

/* ----------------------------------------
   9. Gallery Grid
   ---------------------------------------- */
.gallery {
  padding: var(--spacing-md) 0;
}

.gallery__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--spacing-sm);
}

.gallery__item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 1;
  cursor: pointer;
}

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

.gallery__item:hover img {
  transform: scale(1.05);
}

.gallery__item::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0);
  transition: background-color var(--transition);
}

.gallery__item:hover::after {
  background-color: rgba(0, 0, 0, 0.2);
}

@media (min-width: 768px) {
  .gallery__grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-md);
  }
}

/* ----------------------------------------
   10. Content Sections
   ---------------------------------------- */
.content {
  padding: var(--spacing-lg) 0;
}

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

.content__body {
  max-width: 800px;
}

.content__body p {
  margin-bottom: var(--spacing-sm);
}

.content__body ul,
.content__body ol {
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-md);
}

.content__body ul {
  list-style: disc;
}

.content__body ol {
  list-style: decimal;
}

.content__body li {
  margin-bottom: var(--spacing-xs);
}

/* Title with orange accent */
.title-orange {
  color: var(--color-primary);
  position: relative;
  padding-bottom: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.title-orange::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: 2px;
}

/* ----------------------------------------
   11. Contact Form
   ---------------------------------------- */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.contact-form__group {
  margin-bottom: var(--spacing-sm);
}

.contact-form__label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--color-text);
}

.contact-form__label--required::after {
  content: ' *';
  color: var(--color-primary);
}

.contact-form__input,
.contact-form__textarea,
.contact-form__select {
  width: 100%;
  padding: 0.75rem var(--spacing-sm);
  border: 1px solid #DDD;
  border-radius: var(--radius);
  background-color: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.contact-form__input:focus,
.contact-form__textarea:focus,
.contact-form__select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(184, 92, 56, 0.1);
}

.contact-form__textarea {
  min-height: 150px;
  resize: vertical;
}

.contact-form__input::placeholder,
.contact-form__textarea::placeholder {
  color: var(--color-text-light);
}

.contact-form__error {
  color: #D32F2F;
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

.contact-form__success {
  color: var(--color-secondary);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

@media (min-width: 768px) {
  .contact-form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
  }
}

/* ----------------------------------------
   11b. Form (BEM naming)
   ---------------------------------------- */
.contact-section {
  max-width: 800px;
  margin: 0 auto;
}

.contact-intro {
  color: var(--color-text-light);
  font-size: 1.125rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.form {
  max-width: 600px;
  margin: 0 auto;
}

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

.form__label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--color-text);
}

.form__label--required::after {
  content: ' *';
  color: var(--color-primary);
}

.form__input,
.form__textarea,
.form__select {
  width: 100%;
  padding: 0.75rem var(--spacing-sm);
  border: 1px solid #DDD;
  border-radius: var(--radius);
  background-color: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(184, 92, 56, 0.1);
}

.form__textarea {
  min-height: 150px;
  resize: vertical;
}

.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--color-text-light);
}

.form__error {
  color: #D32F2F;
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

.form__success {
  color: var(--color-secondary);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

/* Nav link active state */
.nav__link--active {
  color: var(--color-primary);
}

/* ----------------------------------------
   12. Buttons
   ---------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
}

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

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

.btn--secondary {
  background-color: var(--color-secondary);
  color: var(--color-white);
  border-color: var(--color-secondary);
}

.btn--secondary:hover {
  background-color: #4A7040;
  border-color: #4A7040;
  color: var(--color-white);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

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

.btn--block {
  display: flex;
  width: 100%;
}

.btn--sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn--lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

/* ----------------------------------------
   13. Links Section
   ---------------------------------------- */
.links-section {
  padding: var(--spacing-lg) 0;
}

.links-section__title {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.links-section__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.links-section__category {
  background-color: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.links-section__category-title {
  color: var(--color-secondary);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  padding-bottom: var(--spacing-xs);
  border-bottom: 2px solid var(--color-cream);
}

.links-section__list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.links-section__item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-xs);
}

.links-section__item::before {
  content: '\2022';
  color: var(--color-primary);
  font-weight: bold;
  flex-shrink: 0;
}

.links-section__link {
  color: var(--color-text);
  transition: color var(--transition);
}

.links-section__link:hover {
  color: var(--color-primary);
}

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

@media (min-width: 1024px) {
  .links-section__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ----------------------------------------
   14. Footer
   ---------------------------------------- */
.footer {
  background-color: var(--color-text);
  color: var(--color-white);
  padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.footer__column {
  text-align: center;
}

.footer__title {
  color: var(--color-white);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.footer__text {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9375rem;
  margin-bottom: var(--spacing-xs);
}

.footer__link {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition);
}

.footer__link:hover {
  color: var(--color-primary);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer__list-link {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9375rem;
  transition: color var(--transition);
}

.footer__list-link:hover {
  color: var(--color-primary);
}

.footer__social {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  transition: background-color var(--transition), color var(--transition);
}

.footer__social-link:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.footer__bottom {
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer__copyright {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.875rem;
}

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

  .footer__column {
    text-align: left;
  }

  .footer__social {
    justify-content: flex-start;
  }
}

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

/* ----------------------------------------
   15. Utility Classes
   ---------------------------------------- */
.text-center {
  text-align: center;
}

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

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

.mb-0 {
  margin-bottom: 0;
}

.mb-xs {
  margin-bottom: var(--spacing-xs);
}

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

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

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

.mt-0 {
  margin-top: 0;
}

.mt-xs {
  margin-top: var(--spacing-xs);
}

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

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

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

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

/* ----------------------------------------
   16. Animations
   ---------------------------------------- */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

.fade-in {
  animation: fadeIn 0.5s ease forwards;
}

.slide-up {
  animation: slideUp 0.5s ease forwards;
}

/* ----------------------------------------
   17. Print Styles
   ---------------------------------------- */
@media print {
  .header,
  .footer,
  .btn,
  .submenu {
    display: none;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
    color: #000;
  }

  a {
    color: #000;
    text-decoration: underline;
  }

  .container {
    max-width: 100%;
    padding: 0;
  }

  .section {
    padding: 1rem 0;
  }
}