/**
 * Zenvithros - Main Style Sheet
 * 
 * This CSS follows a mobile-first approach using BEM methodology.
 * Properties are written in alphabetical order.
 */

/* 
 * ========================================
 * CSS Variables
 * ========================================
 */
:root {
  /* Colors */
  --color-background: #FAFAFA;
  --color-primary: #4CAF50;
  --color-primary-dark: #388E3C;
  --color-primary-light: #81C784;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-white: #FFFFFF;
  --color-border: #E0E0E0;
  --color-error: #D32F2F;
  --color-success: #388E3C;
  --color-warning: #FFA000;
  --color-gray-light: #F5F5F5;
  --color-gray: #9E9E9E;
  --color-gray-dark: #616161;
  
  /* Typography */
  --font-body: 'Lato', sans-serif;
  --font-heading: 'Source Sans Pro', sans-serif;
  --font-size-base: 1rem;
  --font-size-small: 0.875rem;
  --font-size-large: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-xxl: 2rem;
  --font-size-xxxl: 2.5rem;
  --line-height: 1.5;
  
  /* Spacing */
  --spacing-xxs: 0.25rem;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
  
  /* Borders */
  --border-radius: 0; /* Sharp corners as per design */
  --border-width: 1px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Containers */
  --container-max-width: 1200px;
  --container-padding: var(--spacing-md);
  
  /* Z-indexes */
  --z-index-header: 100;
  --z-index-dropdown: 200;
  --z-index-modal: 300;
  --z-index-back-top: 99;
  
  /* Breakpoints (for reference) */
  --breakpoint-sm: 576px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 992px;
  --breakpoint-xl: 1200px;
}

/* 
 * ========================================
 * 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 {
  background-color: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: var(--font-size-xxl);
}

h2 {
  font-size: var(--font-size-xl);
}

h3 {
  font-size: var(--font-size-large);
}

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

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

a:hover, a:focus {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

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

ul, ol {
  list-style-position: inside;
  margin-bottom: var(--spacing-sm);
}

button {
  appearance: none;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
}

/* 
 * ========================================
 * Accessibility
 * ========================================
 */
.skip-link {
  background-color: var(--color-primary);
  color: var(--color-text-white);
  left: 0;
  padding: var(--spacing-sm);
  position: absolute;
  top: -100px;
  transition: top var(--transition-medium);
  z-index: var(--z-index-modal);
}

.skip-link:focus {
  top: 0;
}

/* Focus styles for keyboard navigation */
.keyboard-navigation :focus {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* Hide content visually but keep it accessible for screen readers */
.visually-hidden {
  border: 0;
  clip: rect(0 0 0 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
}

/* 
 * ========================================
 * Layout & Containers
 * ========================================
 */
.header__container,
.hero__container,
.about__container,
.features__container,
.success-stories__container,
.faq__container,
.blog-teaser__container,
.contact__container,
.footer__container,
.legal-page__container,
.success__container {
  margin-left: auto;
  margin-right: auto;
  max-width: var(--container-max-width);
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
  width: 100%;
}

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

.section-title {
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.section-description {
  margin-bottom: var(--spacing-lg);
  margin-left: auto;
  margin-right: auto;
  max-width: 800px;
  text-align: center;
}

/* 
 * ========================================
 * Header & Navigation
 * ========================================
 */
.header {
  background-color: var(--color-background);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: var(--z-index-header);
}

.header__container {
  align-items: center;
  display: flex;
  justify-content: space-between;
  padding-bottom: var(--spacing-sm);
  padding-top: var(--spacing-sm);
}

.header__logo-link {
  display: block;
}

.header__logo {
  height: auto;
  max-height: 50px;
  width: auto;
}

.navigation {
  position: relative;
}

.navigation__toggle {
  align-items: center;
  display: flex;
  height: 40px;
  justify-content: center;
  width: 40px;
}

.navigation__toggle-icon {
  background-color: var(--color-text);
  height: 2px;
  position: relative;
  transition: background-color var(--transition-fast);
  width: 24px;
}

.navigation__toggle-icon::before,
.navigation__toggle-icon::after {
  background-color: var(--color-text);
  content: '';
  height: 2px;
  left: 0;
  position: absolute;
  transition: transform var(--transition-fast);
  width: 24px;
}

.navigation__toggle-icon::before {
  top: -8px;
}

.navigation__toggle-icon::after {
  bottom: -8px;
}

.navigation__toggle[aria-expanded="true"] .navigation__toggle-icon {
  background-color: transparent;
}

.navigation__toggle[aria-expanded="true"] .navigation__toggle-icon::before {
  transform: rotate(45deg) translate(5px, 5px);
}

.navigation__toggle[aria-expanded="true"] .navigation__toggle-icon::after {
  transform: rotate(-45deg) translate(5px, -5px);
}

.navigation__list {
  background-color: var(--color-background);
  display: none;
  flex-direction: column;
  list-style: none;
  margin: 0;
  padding: var(--spacing-sm) 0;
  position: absolute;
  right: 0;
  top: 100%;
  width: 250px;
}

.navigation__list--active {
  display: flex;
}

.navigation__item {
  margin: 0;
}

.navigation__link {
  color: var(--color-text);
  display: block;
  padding: var(--spacing-xs) var(--spacing-sm);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.navigation__link:hover,
.navigation__link:focus {
  color: var(--color-primary);
  text-decoration: none;
}

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

.navigation__link--button {
  background-color: var(--color-primary);
  color: var(--color-text-white);
  padding: var(--spacing-xs) var(--spacing-sm);
  text-align: center;
}

.navigation__link--button:hover,
.navigation__link--button:focus {
  background-color: var(--color-primary-dark);
  color: var(--color-text-white);
}

/* 
 * ========================================
 * Buttons
 * ========================================
 */
.button {
  border: none;
  cursor: pointer;
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: 700;
  padding: var(--spacing-sm) var(--spacing-lg);
  text-align: center;
  text-decoration: none;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.button--primary {
  background-color: var(--color-primary);
  color: var(--color-text-white);
}

.button--primary:hover,
.button--primary:focus {
  background-color: var(--color-primary-dark);
  color: var(--color-text-white);
  text-decoration: none;
}

.button--secondary {
  background-color: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

.button--secondary:hover,
.button--secondary:focus {
  background-color: var(--color-primary);
  color: var(--color-text-white);
  text-decoration: none;
}

.button--full {
  display: block;
  width: 100%;
}

/* 
 * ========================================
 * Hero Section
 * ========================================
 */
.hero {
  padding-bottom: var(--spacing-xl);
  padding-top: var(--spacing-xl);
}

.hero__container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.hero__content {
  max-width: 600px;
}

.hero__title {
  font-size: var(--font-size-xxxl);
  margin-bottom: var(--spacing-sm);
}

.hero__slogan {
  color: var(--color-primary);
  font-size: var(--font-size-large);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.hero__description {
  font-size: var(--font-size-large);
  margin-bottom: var(--spacing-md);
}

.hero__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.hero__image-container {
  align-self: center;
}

.hero__image {
  max-height: 500px;
  object-fit: cover;
  width: 100%;
}

/* 
 * ========================================
 * About Section
 * ========================================
 */
.about {
  background-color: var(--color-gray-light);
}

.about__content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.about__text {
  flex: 1;
}

.about__image-container {
  flex: 1;
}

.about__image {
  height: auto;
  max-height: 400px;
  object-fit: cover;
  width: 100%;
}

/* 
 * ========================================
 * Features Section
 * ========================================
 */
.features__grid {
  display: grid;
  gap: var(--spacing-md);
  grid-template-columns: 1fr;
}

.feature-card {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  padding: var(--spacing-md);
  transition: transform var(--transition-medium);
}

.feature-card:hover {
  transform: translateY(-5px);
}

.feature-card__icon-container {
  align-items: center;
  background-color: var(--color-primary-light);
  border-radius: 50%;
  color: var(--color-text-white);
  display: flex;
  height: 60px;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
  width: 60px;
}

.feature-card__icon {
  font-size: 24px;
}

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

.feature-card__description {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-sm);
}

.feature-card__link {
  align-items: center;
  display: inline-flex;
  font-weight: 700;
  gap: var(--spacing-xxs);
}

.feature-card__link:hover i {
  transform: translateX(3px);
}

.feature-card__link i {
  transition: transform var(--transition-fast);
}

/* 
 * ========================================
 * Separator
 * ========================================
 */
.separator {
  height: 80px;
  overflow: hidden;
  position: relative;
  width: 100%;
}

.separator__gradient {
  background: linear-gradient(to right, var(--color-primary-light), var(--color-primary), var(--color-primary-dark));
  height: 100%;
  left: 0;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 100%;
}

/* 
 * ========================================
 * Success Stories Section
 * ========================================
 */
.success-stories {
  background-color: var(--color-gray-light);
}

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

.story-card {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.story-card__image-container {
  height: 300px;
  overflow: hidden;
  width: 100%;
}

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

.story-card:hover .story-card__image {
  transform: scale(1.05);
}

.story-card__content {
  padding: var(--spacing-md);
}

.story-card__title {
  font-size: var(--font-size-large);
  margin-bottom: var(--spacing-xs);
}

.story-card__quote {
  color: var(--color-text-light);
  font-style: italic;
  margin-bottom: var(--spacing-sm);
}

.story-card__link {
  font-weight: 700;
}

/* 
 * ========================================
 * FAQ Section
 * ========================================
 */
.faq__list {
  margin: 0 auto;
  max-width: 800px;
}

.faq__item {
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-sm);
}

.faq__question {
  align-items: center;
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  font-family: var(--font-heading);
  font-size: var(--font-size-large);
  font-weight: 700;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
  text-align: left;
  width: 100%;
}

.faq__icon {
  color: var(--color-primary);
  font-size: var(--font-size-base);
  transition: transform var(--transition-fast);
}

.faq__question[aria-expanded="true"] .faq__icon {
  transform: rotate(45deg);
}

.faq__answer {
  height: 0;
  max-height: 0;
  overflow: hidden;
  padding-bottom: 0;
  transition: max-height var(--transition-medium);
}

.faq__question[aria-expanded="true"] + .faq__answer {
  height: auto;
  max-height: 1000px;
  padding-bottom: var(--spacing-md);
}

/* 
 * ========================================
 * Blog Teaser Section
 * ========================================
 */
.blog-teaser__grid {
  display: grid;
  gap: var(--spacing-md);
  grid-template-columns: 1fr;
}

.blog-card {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.blog-card__image-container {
  height: 200px;
  overflow: hidden;
  width: 100%;
}

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

.blog-card:hover .blog-card__image {
  transform: scale(1.05);
}

.blog-card__content {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  padding: var(--spacing-md);
}

.blog-card__date {
  color: var(--color-gray);
  font-size: var(--font-size-small);
  margin-bottom: var(--spacing-xs);
}

.blog-card__title {
  font-size: var(--font-size-large);
  margin-bottom: var(--spacing-xs);
}

.blog-card__excerpt {
  color: var(--color-text-light);
  flex-grow: 1;
  margin-bottom: var(--spacing-sm);
}

.blog-card__link {
  align-self: flex-start;
  font-weight: 700;
}

.blog-teaser__cta {
  margin-top: var(--spacing-lg);
  text-align: center;
}

/* 
 * ========================================
 * Contact Section
 * ========================================
 */
.contact {
  background-color: var(--color-gray-light);
}

.contact__container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.contact__content {
  flex: 1;
}

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

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

.contact__info-item {
  align-items: center;
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.contact__info-item p {
  margin-bottom: 0;
}

.contact__info-icon {
  color: var(--color-primary);
  font-size: 20px;
  width: 24px;
}

.contact__form-container {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  flex: 1;
  padding: var(--spacing-lg);
}

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

.form-label {
  display: block;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.form-input,
.form-select,
.form-textarea {
  border: 1px solid var(--color-border);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  padding: var(--spacing-sm);
  transition: border-color var(--transition-fast);
  width: 100%;
}

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

.form-input--error,
.form-select--error,
.form-textarea--error {
  border-color: var(--color-error);
}

.form-error {
  color: var(--color-error);
  font-size: var(--font-size-small);
  margin-top: var(--spacing-xxs);
  min-height: 20px;
}

.form-group--checkbox {
  align-items: flex-start;
  display: flex;
  gap: var(--spacing-xs);
}

.form-checkbox {
  margin-top: 3px;
}

.form-checkbox-label {
  flex: 1;
}

/* 
 * ========================================
 * Footer
 * ========================================
 */
.footer {
  background-color: var(--color-text);
  color: var(--color-text-white);
  padding-bottom: var(--spacing-lg);
  padding-top: var(--spacing-xl);
  position: relative;
}

.footer__logo {
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.footer__logo-image {
  height: auto;
  margin: 0 auto;
  max-height: 50px;
  width: auto;
}

.footer__tagline {
  color: var(--color-gray);
  font-style: italic;
  margin-top: var(--spacing-xs);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer__heading {
  color: var(--color-primary);
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-sm);
}

.footer__list {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.footer__link {
  color: var(--color-gray);
  transition: color var(--transition-fast);
}

.footer__link:hover,
.footer__link:focus {
  color: var(--color-text-white);
}

.footer__social {
  display: flex;
  gap: var(--spacing-sm);
}

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

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

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

.footer__copyright {
  color: var(--color-gray);
  font-size: var(--font-size-small);
}

.back-to-top {
  align-items: center;
  background-color: var(--color-primary);
  bottom: 20px;
  color: var(--color-text-white);
  display: flex;
  height: 40px;
  justify-content: center;
  opacity: 0;
  position: fixed;
  right: 20px;
  transition: opacity var(--transition-fast);
  visibility: hidden;
  width: 40px;
  z-index: var(--z-index-back-top);
}

.back-to-top--visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover,
.back-to-top:focus {
  background-color: var(--color-primary-dark);
  color: var(--color-text-white);
}

/* 
 * ========================================
 * Legal Pages (Terms, Privacy, Cookies)
 * ========================================
 */
.legal-page {
  padding: var(--spacing-xl) 0;
}

.legal-page__title {
  margin-bottom: var(--spacing-xs);
  text-align: center;
}

.legal-page__updated {
  color: var(--color-gray);
  font-size: var(--font-size-small);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.legal-page__content {
  margin: 0 auto;
  max-width: 800px;
}

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

.legal-section__title {
  font-size: var(--font-size-large);
  margin-bottom: var(--spacing-sm);
}

.legal-section__subtitle {
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-xs);
  margin-top: var(--spacing-sm);
}

.legal-section__list {
  list-style-type: disc;
  margin-bottom: var(--spacing-sm);
  margin-left: var(--spacing-md);
}

.legal-section__contact-list {
  list-style: none;
  margin-left: 0;
}

/* 
 * ========================================
 * Success Page
 * ========================================
 */
.success {
  padding: var(--spacing-xxl) 0;
  text-align: center;
}

.success__container {
  max-width: 600px;
}

.success__icon {
  color: var(--color-success);
  font-size: 64px;
  margin-bottom: var(--spacing-md);
}

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

.success__message {
  font-size: var(--font-size-large);
  margin-bottom: var(--spacing-lg);
}

.success__details {
  background-color: var(--color-gray-light);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  text-align: left;
}

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

/* 
 * ========================================
 * Media Queries
 * ========================================
 */

/* Small devices (tablets, 576px and up) */
@media (min-width: 576px) {
  .hero__buttons {
    flex-wrap: nowrap;
  }
  
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .blog-teaser__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
  h1 {
    font-size: var(--font-size-xxxl);
  }
  
  h2 {
    font-size: var(--font-size-xxl);
  }
  
  h3 {
    font-size: var(--font-size-xl);
  }
  
  .navigation__toggle {
    display: none;
  }
  
  .navigation__list {
    align-items: center;
    background-color: transparent;
    display: flex;
    flex-direction: row;
    gap: var(--spacing-md);
    position: static;
    width: auto;
  }
  
  .navigation__item--highlight {
    margin-top: 0;
  }
  
  .hero__container {
    flex-direction: row;
    align-items: center;
  }
  
  .about__content {
    flex-direction: row;
    align-items: center;
  }
  
  .success-stories__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .contact__container {
    flex-direction: row;
  }
  
  .footer__links {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
  .features__grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .blog-teaser__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 
 * ========================================
 * Dark Mode Support
 * ========================================
 */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #121212;
    --color-text: #E0E0E0;
    --color-text-light: #9E9E9E;
    --color-border: #424242;
    --color-gray-light: #1E1E1E;
  }
  
  .header {
    background-color: #1A1A1A;
  }
  
  .navigation__list {
    background-color: #1A1A1A;
  }
  
  .feature-card,
  .story-card,
  .blog-card,
  .contact__form-container {
    background-color: #1E1E1E;
  }
}

/* 
 * ========================================
 * Reduced Motion Support
 * ========================================
 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }
  
  html {
    scroll-behavior: auto;
  }
  
  .feature-card:hover {
    transform: none;
  }
  
  .story-card:hover .story-card__image,
  .blog-card:hover .blog-card__image {
    transform: none;
  }
}