/* 
======================
Variables
======================
*/
:root {
  /* Colors */
  --color-bg: #FFFFFF;
  --color-accent: #2E86AB;
  --color-accent-light: #54a9ca;
  --color-accent-dark: #1f6683;
  --color-text: #1B1B1B;
  --color-text-light: #4B4B4B;
  --color-button: #E0E0E0;
  --color-button-hover: #D0D0D0;
  --color-border: #E5E5E5;
  --color-success: #4CAF50;
  --color-error: #F44336;

  /* Typography */
  --font-primary: 'Roboto Slab', serif;
  --font-secondary: 'Open Sans', 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: 1.6;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;

  /* Borders */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Breakpoints */
  --bp-sm: 576px;
  --bp-md: 768px;
  --bp-lg: 992px;
  --bp-xl: 1200px;
}

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

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

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-secondary);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
}

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

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

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

ul {
  list-style: none;
}

/* 
======================
Accessibility
======================
*/
.sr-only {
  border: 0;
  clip: rect(0, 0, 0, 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

.skip-link {
  background-color: var(--color-accent);
  color: white;
  font-weight: 600;
  left: -999px;
  padding: var(--spacing-sm) var(--spacing-md);
  position: absolute;
  top: -999px;
  z-index: 9999;
}

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

/* 
======================
Layout
======================
*/
.container {
  margin: 0 auto;
  max-width: 1200px;
  padding: 0 var(--spacing-md);
  width: 100%;
}

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

.section--alt {
  background-color: #f8f9fa;
}

.section__title {
  color: var(--color-text);
  font-family: var(--font-primary);
  font-size: var(--font-size-xxl);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.section__subtitle {
  color: var(--color-text-light);
  font-size: var(--font-size-large);
  margin: 0 auto var(--spacing-lg);
  max-width: 800px;
  text-align: center;
}

/* 
======================
Buttons
======================
*/
.button {
  background-color: var(--color-button);
  border: none;
  border-radius: var(--border-radius-md);
  color: var(--color-text);
  cursor: pointer;
  display: inline-block;
  font-family: var(--font-secondary);
  font-size: var(--font-size-base);
  font-weight: 600;
  padding: var(--spacing-sm) var(--spacing-lg);
  text-align: center;
  transition: all var(--transition-fast);
}

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

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

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

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

.button--secondary:hover,
.button--secondary:focus {
  background-color: rgba(46, 134, 171, 0.1);
}

/* 
======================
Header & Navigation
======================
*/
.header {
  background-color: var(--color-bg);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header__container {
  align-items: center;
  display: flex;
  justify-content: space-between;
}

.logo {
  display: block;
}

.logo img {
  height: auto;
}

.nav__toggle {
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  display: block;
  font-size: var(--font-size-xl);
  padding: var(--spacing-xs);
}

.nav__menu {
  background-color: var(--color-bg);
  box-shadow: var(--shadow-md);
  display: none;
  flex-direction: column;
  left: 0;
  padding: var(--spacing-md);
  position: absolute;
  right: 0;
  top: 100%;
  z-index: 10;
}

.nav__menu.is-active {
  display: flex;
}

.nav__item {
  margin: var(--spacing-xs) 0;
}

.nav__link {
  color: var(--color-text);
  display: block;
  font-weight: 600;
  padding: var(--spacing-xs) 0;
  transition: color var(--transition-fast);
}

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

@media (min-width: 768px) {
  .nav__toggle {
    display: none;
  }

  .nav__menu {
    background-color: transparent;
    box-shadow: none;
    display: flex;
    flex-direction: row;
    position: static;
    padding: 0;
  }

  .nav__item {
    margin: 0 0 0 var(--spacing-lg);
  }
}

/* 
======================
Hero Section
======================
*/
.hero {
  background-color: var(--color-bg);
  padding: var(--spacing-xl) 0;
}

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

.hero__content {
  max-width: 600px;
}

.hero__title {
  color: var(--color-text);
  font-family: var(--font-primary);
  font-size: var(--font-size-xxxl);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

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

.hero__image img {
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  width: 100%;
}

@media (min-width: 992px) {
  .hero__container {
    align-items: center;
    flex-direction: row;
    justify-content: space-between;
  }

  .hero__content {
    flex: 1;
  }

  .hero__image {
    flex: 1;
  }
}

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

.feature {
  background-color: var(--color-bg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
  text-align: center;
  transition: transform var(--transition-normal);
}

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

.feature__icon {
  color: var(--color-accent);
  font-size: 2.5rem !important;
  margin-bottom: var(--spacing-md);
}

.feature__title {
  color: var(--color-text);
  font-family: var(--font-primary);
  font-size: var(--font-size-large);
  margin-bottom: var(--spacing-sm);
}

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

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

@media (min-width: 992px) {
  .features {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* 
======================
Routines Section
======================
*/
.routines {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

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

.routine__image img {
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  width: 100%;
}

.routine__title {
  color: var(--color-text);
  font-family: var(--font-primary);
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
}

.routine__list {
  list-style-type: disc;
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

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

.routine__details {
  background-color: #f8f9fa;
  border-left: 3px solid var(--color-accent);
  display: none;
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
}

.routine__details.is-visible {
  display: block;
}

@media (min-width: 992px) {
  .routine {
    flex-direction: row;
    align-items: center;
  }

  .routine__image,
  .routine__content {
    flex: 1;
  }

  .routine--reverse {
    flex-direction: row-reverse;
  }
}

/* 
======================
Benefits Section
======================
*/
.benefits {
  display: grid;
  gap: var(--spacing-xl);
}

.benefit {
  display: grid;
  gap: var(--spacing-lg);
}

.benefit img {
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  width: 100%;
}

.benefit__title {
  color: var(--color-text);
  font-family: var(--font-primary);
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
}

.benefit__text {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
}

.benefit__list {
  list-style-type: disc;
  padding-left: var(--spacing-lg);
}

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

@media (min-width: 992px) {
  .benefit {
    align-items: center;
    grid-template-columns: repeat(2, 1fr);
  }

  .benefit img,
  .benefit__content {
    flex: 1;
  }

  .benefit--reverse {
    flex-direction: row-reverse;
  }
}

/* 
======================
Comparison Section
======================
*/
.comparison {
  background-color: var(--color-bg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.comparison__column {
  flex: 1;
  padding: var(--spacing-lg);
}

.comparison__column:first-child {
  border-bottom: 1px solid var(--color-border);
}

.comparison__title {
  color: var(--color-text);
  font-family: var(--font-primary);
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.comparison__list {
  list-style: none;
}

.comparison__item {
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-lg);
  position: relative;
}

.comparison__item::before {
  content: "";
  height: 8px;
  left: 0;
  position: absolute;
  top: 8px;
  width: 8px;
}

.comparison__item--positive::before {
  background-color: var(--color-success);
  border-radius: 50%;
}

.comparison__item--negative::before {
  background-color: var(--color-error);
  border-radius: 50%;
}

.comparison__item--neutral::before {
  background-color: var(--color-button);
  border-radius: 50%;
}

@media (min-width: 768px) {
  .comparison {
    flex-direction: row;
  }

  .comparison__column:first-child {
    border-bottom: none;
    border-right: 1px solid var(--color-border);
  }
}

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

.guide {
  background-color: var(--color-bg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition-normal);
}

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

.guide img {
  height: 200px;
  object-fit: cover;
  width: 100%;
}

.guide__title {
  color: var(--color-text);
  font-family: var(--font-primary);
  font-size: var(--font-size-large);
  margin: var(--spacing-md);
}

.guide__list {
  list-style-type: disc;
  margin: 0 var(--spacing-md) var(--spacing-md);
  padding-left: var(--spacing-lg);
}

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

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

@media (min-width: 992px) {
  .guides {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 
======================
FAQ Section
======================
*/
.faq {
  background-color: var(--color-bg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  margin: 0 auto;
  max-width: 800px;
  overflow: hidden;
}

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

.faq__item:last-child {
  border-bottom: none;
}

.faq__question {
  align-items: center;
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  font-family: var(--font-primary);
  font-size: var(--font-size-large);
  font-weight: 600;
  justify-content: space-between;
  padding: var(--spacing-lg);
  text-align: left;
  width: 100%;
}

.faq__question .material-icons {
  transition: transform var(--transition-fast);
}

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

.faq__answer {
  display: none;
  padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.faq__question[aria-expanded="true"] + .faq__answer {
  display: block;
}

/* 
======================
Checklist Section
======================
*/
.checklist {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin: 0 auto;
  max-width: 800px;
}

.checklist__item {
  align-items: flex-start;
  background-color: var(--color-bg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  padding: var(--spacing-md);
}

.checklist__number {
  align-items: center;
  background-color: var(--color-accent);
  border-radius: 50%;
  color: white;
  display: flex;
  font-weight: 700;
  height: 36px;
  justify-content: center;
  margin-right: var(--spacing-md);
  min-width: 36px;
  width: 36px;
}

.checklist__title {
  color: var(--color-text);
  font-family: var(--font-primary);
  font-size: var(--font-size-large);
  margin-bottom: var(--spacing-xs);
}

/* 
======================
Contact Section
======================
*/
.contact {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.contact__info {
  background-color: var(--color-bg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
}

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

.contact__item {
  align-items: center;
  display: flex;
  margin-bottom: var(--spacing-md);
}

.contact__item .material-icons {
  color: var(--color-accent);
  margin-right: var(--spacing-md);
}

.contact__form {
  background-color: var(--color-bg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
}

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

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

.form__input {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-family: var(--font-secondary);
  font-size: var(--font-size-base);
  padding: var(--spacing-sm);
  width: 100%;
}

.form__input:focus {
  border-color: var(--color-accent);
  outline: none;
}

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

.form__input.is-invalid {
  border-color: var(--color-error);
}

.form__error {
  color: var(--color-error);
  display: block;
  font-size: var(--font-size-small);
  margin-top: var(--spacing-xs);
}

@media (min-width: 768px) {
  .contact {
    flex-direction: row;
  }

  .contact__info,
  .contact__form {
    flex: 1;
  }
}

/* 
======================
Footer
======================
*/
.footer {
  background-color: #f8f9fa;
  padding: var(--spacing-xl) 0;
}

.footer__top {
  align-items: center;
  display: flex;
  flex-direction: column;
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.footer__logo {
  display: block;
  margin-bottom: var(--spacing-sm);
}

.footer__slogan {
  color: var(--color-text-light);
  font-style: italic;
}

.footer__bottom {
  align-items: center;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding-top: var(--spacing-lg);
}

.footer__nav {
  display: flex;
  gap: var(--spacing-lg);
}

.footer__link {
  color: var(--color-text-light);
  font-size: var(--font-size-small);
}

.footer__copyright {
  color: var(--color-text-light);
  font-size: var(--font-size-small);
  text-align: center;
}

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

/* 
======================
Policy Pages
======================
*/
.policy-content {
  background-color: var(--color-bg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  margin: 0 auto;
  max-width: 800px;
  padding: var(--spacing-lg);
}

.policy-content h2 {
  color: var(--color-text);
  font-family: var(--font-primary);
  font-size: var(--font-size-xl);
  margin: var(--spacing-lg) 0 var(--spacing-md);
}

.policy-content h2:first-child {
  margin-top: 0;
}

.policy-content h3 {
  color: var(--color-text);
  font-family: var(--font-primary);
  font-size: var(--font-size-large);
  margin: var(--spacing-md) 0 var(--spacing-sm);
}

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

.policy-list {
  list-style-type: disc;
  margin: var(--spacing-sm) 0 var(--spacing-md) var(--spacing-lg);
}

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

.success-message {
  align-items: center;
  background-color: var(--color-bg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  margin: 0 auto;
  max-width: 600px;
  padding: var(--spacing-xl);
  text-align: center;
}

.success-message__icon {
  color: var(--color-success);
  font-size: 4rem !important;
  margin-bottom: var(--spacing-md);
}

.success-message__title {
  color: var(--color-text);
  font-family: var(--font-primary);
  font-size: var(--font-size-xxl);
  margin-bottom: var(--spacing-md);
}

.success-message__text {
  color: var(--color-text-light);
  font-size: var(--font-size-large);
  margin-bottom: var(--spacing-lg);
}

/* 
======================
Back to Top Button
======================
*/
.back-to-top {
  align-items: center;
  background-color: var(--color-accent);
  border: none;
  border-radius: 50%;
  bottom: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  color: white;
  cursor: pointer;
  display: flex;
  height: 50px;
  justify-content: center;
  opacity: 0;
  position: fixed;
  right: var(--spacing-lg);
  transition: opacity var(--transition-normal), background-color var(--transition-fast);
  visibility: hidden;
  width: 50px;
  z-index: 90;
}

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

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

/* 
======================
Prefers Reduced Motion
======================
*/
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

/* 
======================
Dark Mode
======================
*/
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #121212;
    --color-text: #E0E0E0;
    --color-text-light: #ADADAD;
    --color-button: #333333;
    --color-button-hover: #444444;
    --color-border: #333333;
  }

  .section--alt {
    background-color: #1E1E1E;
  }

  .feature,
  .comparison,
  .guide,
  .faq,
  .checklist__item,
  .contact__info,
  .contact__form {
    background-color: #1E1E1E;
  }

  .form__input {
    background-color: #333333;
    border-color: #444444;
    color: var(--color-text);
  }

  .footer {
    background-color: #1E1E1E;
  }

  .routine__details {
    background-color: #1E1E1E;
  }
}

#main-content {
  min-height: calc(100vh - 300px);
}