/* 
 * Vinterola - Main Stylesheet
 * Website for specialized injury recovery gym
 * Created: June 30, 2025
 */

/* ============================
   Table of Contents:
   1. CSS Variables
   2. Base & Typography
   3. Layout & Grid
   4. Header
   5. Hero Section
   6. Recovery Section
   7. Programs Section
   8. Stories Section
   9. Equipment Section
   10. Tips Section
   11. Benefits Section
   12. FAQ Section
   13. Contact Section
   14. Footer
   15. Back to Top Button
   16. Standard Page Styles
   17. Success Page
   18. Form Styles
   19. Utility Classes
   20. Animations
   21. Media Queries
   ============================ */

/* ============================
   1. CSS Variables
   ============================ */
:root {
  /* Colors */
  --color-background: #E6ECEF;
  --color-accent: #6B7280;
  --color-text: #1F2937;
  --color-button: #9CA3AF;
  --color-button-hover: #4B5563;
  --color-light: #F9FAFB;
  --color-error: #EF4444;
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-info: #3B82F6;
  
  /* Typography */
  --font-heading: 'Roboto Slab', serif;
  --font-body: 'Lato', sans-serif;
  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 1rem;    /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem;  /* 36px */
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-loose: 1.8;
  
  /* Spacing */
  --spacing-xs: 0.25rem;   /* 4px */
  --spacing-sm: 0.5rem;    /* 8px */
  --spacing-md: 1rem;      /* 16px */
  --spacing-lg: 1.5rem;    /* 24px */
  --spacing-xl: 2rem;      /* 32px */
  --spacing-2xl: 3rem;     /* 48px */
  --spacing-3xl: 4rem;     /* 64px */
  
  /* Borders */
  --border-radius-sm: 0.25rem;  /* 4px */
  --border-radius-md: 0.5rem;   /* 8px */
  --border-radius-lg: 1rem;     /* 16px */
  --border-radius-full: 9999px;
  --border-width-thin: 1px;
  --border-width-normal: 2px;
  --border-width-thick: 4px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  /* Z-indices */
  --z-behind: -1;
  --z-normal: 0;
  --z-raised: 10;
  --z-header: 100;
  --z-modal: 1000;
  
  /* Container width */
  --container-max-width: 1200px;
  --container-padding: 1.5rem;
  
  /* Breakpoints */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
}

/* ============================
   2. Base & Typography
   ============================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

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

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
}

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

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

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

a:hover, a:focus {
  color: var(--color-text);
}

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

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

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

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

/* ============================
   3. Layout & Grid
   ============================ */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

section {
  padding: var(--spacing-2xl) 0;
}

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

.section-title::after {
  content: '';
  display: block;
  width: 4rem;
  height: 0.25rem;
  background-color: var(--color-accent);
  margin: var(--spacing-sm) auto 0;
  border-radius: var(--border-radius-sm);
}

.section-description {
  text-align: center;
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xl);
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
}

/* ============================
   4. Header
   ============================ */
.header {
  background-color: var(--color-background);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  transition: box-shadow var(--transition-normal), padding var(--transition-normal);
}

.header--sticky {
  box-shadow: var(--shadow-md);
  padding: var(--spacing-sm) 0;
  background-color: rgba(230, 236, 239, 0.95);
  backdrop-filter: blur(8px);
}

.header__container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--spacing-lg);
}

.header__logo {
  display: block;
  width: 150px;
  height: auto;
  transition: transform var(--transition-fast);
}

.header__logo:hover, 
.header__logo:focus {
  transform: scale(1.05);
}

.header__nav {
  display: flex;
  align-items: center;
}

.header__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background-color: var(--color-accent);
  color: var(--color-light);
  border-radius: var(--border-radius-md);
  transition: background-color var(--transition-fast);
}

.header__toggle:hover, 
.header__toggle:focus {
  background-color: var(--color-text);
}

.header__toggle .material-icons {
  font-size: 1.5rem;
}

.header__menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  height: 100vh;
  background-color: var(--color-background);
  box-shadow: var(--shadow-xl);
  list-style: none;
  padding: var(--spacing-xl) var(--spacing-lg);
  z-index: var(--z-modal);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  transition: right var(--transition-normal);
}

.header__menu--active {
  right: 0;
}

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

.header__link {
  display: block;
  padding: var(--spacing-sm) 0;
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.header__link--button {
  background-color: var(--color-button);
  color: var(--color-light);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-md);
  text-align: center;
  transition: background-color var(--transition-fast);
}

.header__link--button:hover, 
.header__link--button:focus {
  background-color: var(--color-button-hover);
  color: var(--color-light);
}

/* ============================
   5. Hero Section
   ============================ */
.hero {
  min-height: 80vh;
  background-image: url('../images/img00.jpg');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  display: flex;
  align-items: center;
  position: relative;
  justify-content: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(31, 41, 55, 0.7);
  z-index: var(--z-behind);
}

.hero__content {
  width: 100%;
  max-width: 36rem;
  color: var(--color-light);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  background-color: rgba(31, 41, 55, 0.4);
  backdrop-filter: blur(8px);
}

.hero__title {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-md);
}

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

.hero__button {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  background-color: var(--color-accent);
  color: var(--color-light);
  border-radius: var(--border-radius-md);
  font-weight: 700;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.hero__button:hover, 
.hero__button:focus {
  background-color: var(--color-text);
  color: var(--color-light);
  transform: translateY(-2px);
}

/* ============================
   6. Recovery Section
   ============================ */
.recovery {
  background-color: var(--color-light);
}

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

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

.recovery__link {
  display: inline-block;
  margin-top: var(--spacing-md);
  font-weight: 700;
  color: var(--color-accent);
  position: relative;
}

.recovery__link::after {
  content: '→';
  display: inline-block;
  margin-left: var(--spacing-sm);
  transition: transform var(--transition-fast);
}

.recovery__link:hover::after, 
.recovery__link:focus::after {
  transform: translateX(4px);
}

.recovery__image {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

.recovery__img {
  transition: transform var(--transition-slow);
}

.recovery__image:hover .recovery__img {
  transform: scale(1.05);
}

/* ============================
   7. Programs Section
   ============================ */
.programs__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.program-card {
  background-color: var(--color-light);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.program-card:hover, 
.program-card:focus-within {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.program-card__icon {
  background-color: var(--color-accent);
  color: var(--color-light);
  width: 3rem;
  height: 3rem;
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
}

.program-card__icon .material-icons {
  font-size: 1.5rem;
}

.program-card__title {
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-xl);
}

.program-card__text {
  margin-bottom: var(--spacing-md);
  flex-grow: 1;
}

.program-card__link {
  align-self: flex-start;
  font-weight: 700;
  position: relative;
}

.program-card__link::after {
  content: '→';
  display: inline-block;
  margin-left: var(--spacing-sm);
  transition: transform var(--transition-fast);
}

.program-card__link:hover::after, 
.program-card__link:focus::after {
  transform: translateX(4px);
}

/* ============================
   8. Stories Section
   ============================ */
.stories {
  background-color: var(--color-accent);
  color: var(--color-light);
}

.stories .section-title::after {
  background-color: var(--color-light);
}

.stories__slider {
  display: flex;
  overflow: hidden;
  margin-bottom: var(--spacing-lg);
  transition: transform var(--transition-normal);
}

.story-card {
  flex: 0 0 100%;
  min-width: 100%;
  padding: 0 var(--spacing-sm);
  display: flex;
  flex-direction: column;
}

.story-card__image {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

.story-card__content {
  background-color: var(--color-light);
  color: var(--color-text);
  padding: var(--spacing-lg);
  border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
  flex-grow: 1;
}

.story-card__name {
  margin-bottom: var(--spacing-sm);
  color: var(--color-accent);
}

.story-card__text {
  font-style: italic;
}

.stories__controls {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
}

.stories__button {
  background-color: var(--color-light);
  color: var(--color-accent);
  width: 3rem;
  height: 3rem;
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.stories__button:hover, 
.stories__button:focus {
  background-color: var(--color-text);
  color: var(--color-light);
}

.stories__button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ============================
   9. Equipment Section
   ============================ */
.equipment__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.equipment__item {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  background-color: var(--color-light);
}

.equipment__image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.equipment__item:hover .equipment__image {
  transform: scale(1.05);
}

.equipment__title {
  padding: var(--spacing-md) var(--spacing-md) 0;
  margin-bottom: var(--spacing-sm);
}

.equipment__text {
  padding: 0 var(--spacing-md) var(--spacing-md);
}

/* ============================
   10. Tips Section
   ============================ */
.tips {
  background-color: var(--color-light);
}

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

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

.tips__image {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

.tips__img {
  display: block;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
  width: 100%;
}

.tips__image:hover .tips__img {
  transform: scale(1.05);
}

.tip-card {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background-color: var(--color-background);
  border-radius: var(--border-radius-md);
  transition: transform var(--transition-normal);
}

.tip-card:hover {
  transform: translateY(-4px);
}

.tip-card__icon {
  flex-shrink: 0;
  background-color: var(--color-accent);
  color: var(--color-light);
  width: 3rem;
  height: 3rem;
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tip-card__icon .material-icons {
  font-size: 1.5rem;
}

.tip-card__content {
  flex-grow: 1;
}

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

.tip-card__text {
  margin-bottom: 0;
}

/* ============================
   11. Benefits Section
   ============================ */
.benefits__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.benefit-card {
  background-color: var(--color-light);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.benefit-card__title {
  margin-bottom: var(--spacing-sm);
  color: var(--color-accent);
}

.benefit-card__text {
  margin-bottom: 0;
}

/* ============================
   12. FAQ Section
   ============================ */
.faq {
  background-color: var(--color-light);
}

.faq__list {
  max-width: 48rem;
  margin: 0 auto;
}

.faq__item {
  margin-bottom: var(--spacing-md);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  background-color: var(--color-background);
}

.faq__question {
  width: 100%;
  text-align: left;
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-background);
  font-weight: 700;
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.faq__question:hover, 
.faq__question:focus {
  background-color: rgba(107, 114, 128, 0.1);
}

.faq__icon {
  color: var(--color-accent);
  transition: transform var(--transition-fast);
}

.faq__question[aria-expanded="true"] .faq__icon {
  transform: rotate(180deg);
}

.faq__answer {
  padding: 0 var(--spacing-lg);
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition-normal);
}

.faq__answer p {
  margin-bottom: 0;
  padding-top: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
}

/* ============================
   13. Contact Section
   ============================ */
.contact__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

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

.contact__details {
  background-color: var(--color-light);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

.contact__subtitle {
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

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

.contact__text:last-child {
  margin-bottom: 0;
}

.contact__link {
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.contact__link:hover, 
.contact__link:focus {
  color: var(--color-accent);
}

.contact__map {
  height: 430px;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.contact__map-placeholder {
  height: 100%;
  background-color: var(--color-light);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.contact__map-placeholder:hover {
  background-color: rgba(107, 114, 128, 0.1);
}

.contact__map-placeholder .material-icons {
  font-size: 3rem;
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.contact__map-placeholder--active {
  background-color: var(--color-background);
}

.contact__form-container {
  background-color: var(--color-light);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

/* ============================
   14. Footer
   ============================ */
.footer {
  background-color: var(--color-accent);
  color: var(--color-light);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

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

.footer__logo img {
  display: inline-block;
  filter: brightness(0) invert(1);
  transition: transform var(--transition-fast);
}

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

.footer__nav {
  margin-bottom: var(--spacing-xl);
}

.footer__menu {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md);
}

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

.footer__link:hover, 
.footer__link:focus {
  opacity: 0.8;
  color: var(--color-light);
}

.footer__bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.footer__copyright {
  font-size: var(--font-size-sm);
  opacity: 0.8;
}

/* ============================
   15. Back to Top Button
   ============================ */
.back-to-top {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  background-color: var(--color-accent);
  color: var(--color-light);
  width: 3rem;
  height: 3rem;
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  z-index: var(--z-raised);
  transition: background-color var(--transition-fast), transform var(--transition-fast), opacity var(--transition-normal), visibility var(--transition-normal);
}

.back-to-top:hover, 
.back-to-top:focus {
  background-color: var(--color-text);
  color: var(--color-light);
  transform: translateY(-4px);
}

/* ============================
   16. Standard Page Styles
   ============================ */
.page-header {
  background-color: var(--color-accent);
  color: var(--color-light);
  padding: var(--spacing-3xl) 0;
  text-align: center;
}

.page-header__title {
  margin: 0;
}

.page-content {
  padding: var(--spacing-2xl) 0;
}

.content-block {
  margin-bottom: var(--spacing-2xl);
}

.content-block:last-child {
  margin-bottom: 0;
}

.content-block__title {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
}

.content-block__subtitle {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-lg);
}

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

.content-list li {
  margin-bottom: var(--spacing-sm);
}

.content-note {
  font-size: var(--font-size-sm);
  font-style: italic;
  color: var(--color-accent);
}

.content-link {
  text-decoration: underline;
}

/* ============================
   17. Success Page
   ============================ */
.success {
  min-height: 60vh;
  display: flex;
  align-items: center;
  padding: var(--spacing-3xl) 0;
}

.success__content {
  background-color: var(--color-light);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  text-align: center;
  max-width: 36rem;
  margin: 0 auto;
}

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

.success__icon .material-icons {
  font-size: 4rem;
}

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

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

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

.success__actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
}

.success__button {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  background-color: var(--color-accent);
  color: var(--color-light);
  border-radius: var(--border-radius-md);
  font-weight: 700;
  transition: background-color var(--transition-fast);
}

.success__button:hover, 
.success__button:focus {
  background-color: var(--color-text);
  color: var(--color-light);
}

.success__link {
  font-weight: 700;
}

/* ============================
   18. Form Styles
   ============================ */
.form__group {
  margin-bottom: var(--spacing-md);
}

.form__label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 700;
}

.form__input,
.form__select,
.form__textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: var(--border-width-thin) solid var(--color-accent);
  border-radius: var(--border-radius-md);
  background-color: var(--color-light);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-text);
  box-shadow: 0 0 0 3px rgba(107, 114, 128, 0.2);
}

.form__input--error,
.form__select--error,
.form__textarea--error {
  border-color: var(--color-error);
}

.form__input--error:focus,
.form__select--error:focus,
.form__textarea--error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

.form__group--checkbox {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.form__checkbox {
  width: 1.25rem;
  height: 1.25rem;
  cursor: pointer;
}

.form__checkbox-label {
  font-size: var(--font-size-sm);
  cursor: pointer;
}

.form__link {
  text-decoration: underline;
}

.form__submit {
  display: block;
  width: 100%;
  padding: var(--spacing-md);
  background-color: var(--color-accent);
  color: var(--color-light);
  border: none;
  border-radius: var(--border-radius-md);
  font-weight: 700;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.form__submit:hover, 
.form__submit:focus {
  background-color: var(--color-text);
}

.form__error-message {
  background-color: var(--color-error);
  color: var(--color-light);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--spacing-md);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

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

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

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

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

.text-success {
  color: var(--color-success);
}

.text-error {
  color: var(--color-error);
}

.text-warning {
  color: var(--color-warning);
}

.text-info {
  color: var(--color-info);
}

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

.bg-accent {
  background-color: var(--color-accent);
}

.bg-light {
  background-color: var(--color-light);
}

.bg-background {
  background-color: var(--color-background);
}

.hidden {
  display: none !important;
}

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

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

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

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}

.fade-in {
  animation: fadeIn 1s ease-out;
}

.slide-in-up {
  animation: slideInUp 0.5s ease-out;
}

.pulse {
  animation: pulse 2s infinite;
}

/* ============================
   21. Media Queries
   ============================ */
/* Small devices (tablets, 640px and up) */
@media (min-width: 640px) {
  :root {
    --container-padding: 2rem;
  }
  
  h1 {
    font-size: var(--font-size-4xl);
  }
  
  h2 {
    font-size: var(--font-size-3xl);
  }
  
  h3 {
    font-size: var(--font-size-2xl);
  }
  
  .programs__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .benefits__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .equipment__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .story-card {
    flex-direction: row;
  }
  
  .story-card__image {
    width: 40%;
    height: auto;
    border-radius: var(--border-radius-lg) 0 0 var(--border-radius-lg);
  }
  
  .story-card__content {
    width: 60%;
    border-radius: 0 var(--border-radius-lg) var(--border-radius-lg) 0;
  }
  
  .success__actions {
    flex-direction: row;
    justify-content: center;
  }
}

/* Medium devices (laptops, 768px and up) */
@media (min-width: 768px) {
  section {
    padding: var(--spacing-3xl) 0;
  }
  
  .header__toggle {
    display: none;
  }
  
  .header__menu {
    position: static;
    width: auto;
    height: auto;
    background-color: transparent;
    box-shadow: none;
    padding: 0;
    flex-direction: row;
    align-items: center;
  }
  
  .header__item {
    margin-bottom: 0;
    margin-left: var(--spacing-md);
  }
  
  .recovery__content {
    grid-template-columns: 1fr 1fr;
  }
  
  .tips__container {
    grid-template-columns: 1fr 1fr;
  }
  
  .contact__content {
    grid-template-columns: 1fr 1fr;
  }
  
  .contact__info {
    grid-template-columns: 1fr;
  }
}

/* Large devices (desktops, 1024px and up) */
@media (min-width: 1024px) {
  :root {
    --container-padding: 2.5rem;
  }
  
  .programs__grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .equipment__grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .benefits__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .story-card {
    flex: 0 0 calc(33.333% - var(--spacing-md));
    min-width: calc(33.333% - var(--spacing-md));
  }
}

/* Extra large devices (large desktops, 1280px and up) */
@media (min-width: 1280px) {
  :root {
    --container-padding: 3rem;
  }
  
  .hero__content {
    padding: var(--spacing-2xl);
  }
  
  .hero__title {
    font-size: calc(var(--font-size-4xl) * 1.2);
  }
  
  .contact__content {
    grid-template-columns: 3fr 2fr;
  }
}