/* style.css */

@import url("https://fonts.googleapis.com/css2?family=Manrope:wght@300;400;500;700&display=swap");

:root {
  /* Light Theme Palette */
  --color-bg-light: #f8f9fa;
  --color-surface-light: #ffffff;
  --color-primary-light: #2b6777;
  --color-secondary-light: #52ab98;
  --color-accent-light: #c8d8e4;
  --color-text-primary-light: #0d1b2a;
  --color-text-secondary-light: #495057;
  --color-border-light: #dee2e6;

  /* Dark Theme Palette */
  --color-bg-dark: #0d1b2a;
  --color-surface-dark: #1b263b;
  --color-primary-dark: #52ab98;
  --color-secondary-dark: #2b6777;
  --color-accent-dark: #415a77;
  --color-text-primary-dark: #f8f9fa;
  --color-text-secondary-dark: #adb5bd;
  --color-border-dark: #495057;

  /* Default Theme (Light) */
  --color-bg: var(--color-bg-light);
  --color-surface: var(--color-surface-light);
  --color-primary: var(--color-primary-light);
  --color-secondary: var(--color-secondary-light);
  --color-accent: var(--color-accent-light);
  --color-text-primary: var(--color-text-primary-light);
  --color-text-secondary: var(--color-text-secondary-light);
  --color-border: var(--color-border-light);

  /* Typography */
  --font-family-base: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Helvetica, Arial, sans-serif;
  --font-size-xs: clamp(0.75rem, 0.5vw + 0.6rem, 0.875rem);
  --font-size-s: clamp(0.875rem, 0.5vw + 0.7rem, 1rem);
  --font-size-m: clamp(1rem, 0.5vw + 0.8rem, 1.125rem);
  --font-size-l: clamp(1.25rem, 1vw + 1rem, 1.5rem);
  --font-size-xl: clamp(1.5rem, 2vw + 1rem, 2.25rem);
  --font-size-xxl: clamp(2.25rem, 4vw + 1rem, 4rem);

  --line-height-tight: 1.2;
  --line-height-normal: 1.6;
  --line-height-loose: 1.8;

  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;

  /* Spacing */
  --space-xxs: 0.25rem; /* 4px */
  --space-xs: 0.5rem; /* 8px */
  --space-s: 0.75rem; /* 12px */
  --space-m: 1rem; /* 16px */
  --space-l: 1.5rem; /* 24px */
  --space-xl: 2.5rem; /* 40px */
  --space-xxl: 4rem; /* 64px */
  --space-xxxl: 6rem; /* 96px */

  /* Borders & Radius */
  --border-radius-s: 4px;
  --border-radius-m: 8px;
  --border-radius-l: 16px;
  --border-width: 1px;

  /* Transitions & Shadows */
  --transition-fast: 0.2s ease-in-out;
  --transition-slow: 0.4s ease-in-out;
  --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.05);
  --shadow-medium: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-hard: 0 12px 32px rgba(0, 0, 0, 0.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: var(--color-bg-dark);
    --color-surface: var(--color-surface-dark);
    --color-primary: var(--color-primary-dark);
    --color-secondary: var(--color-secondary-dark);
    --color-accent: var(--color-accent-dark);
    --color-text-primary: var(--color-text-primary-dark);
    --color-text-secondary: var(--color-text-secondary-dark);
    --color-border: var(--color-border-dark);
    --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-hard: 0 12px 32px rgba(0, 0, 0, 0.2);
  }
}

/* 1. Global Styles & Resets */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-base);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-size: var(--font-size-m);
  line-height: var(--line-height-normal);
  transition: background-color var(--transition-slow),
    color var(--transition-slow);
}

/* 2. Typography */

h1,
h2,
h3,
h4 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
  text-wrap: balance;
}

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

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

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

p {
  margin-bottom: var(--space-l);
  max-width: 75ch;
  color: var(--color-text-secondary);
}

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

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

a:hover,
a:focus {
  color: var(--color-secondary);
  outline: 2px solid transparent;
  outline-offset: 2px;
}

ul,
ol {
  list-style-position: inside;
  padding-left: var(--space-m);
}

li {
  margin-bottom: var(--space-s);
}

blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--space-l);
  margin: var(--space-l) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

cite {
  display: block;
  margin-top: var(--space-m);
  font-style: normal;
  font-weight: var(--font-weight-medium);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--border-radius-m);
}

/* 3. Layout */

.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-l);
  padding-right: var(--space-l);
}

section {
  padding-top: var(--space-xxxl);
  padding-bottom: var(--space-xxxl);
}

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

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

@media (min-width: 768px) {
  .grid-2-cols {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3-cols {
    grid-template-columns: repeat(3, 1fr);
  }
}

.section-divider {
  border: 0;
  height: var(--border-width);
  background-color: var(--color-border);
  width: 90%;
  max-width: 1280px;
  margin: 0 auto;
}

/* 4. Header & Navigation */

.main-header {
  padding: var(--space-m) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: var(--border-width) solid var(--color-border);
  transition: background-color var(--transition-slow);
}

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

.logo {
  font-size: var(--font-size-l);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

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

.nav-menu {
  list-style: none;
  display: flex;
  gap: var(--space-l);
  padding-left: 0;
}

.nav-menu a {
  font-size: var(--font-size-s);
  font-weight: var(--font-weight-medium);
  padding: var(--space-xs) var(--space-s);
  border-radius: var(--border-radius-s);
  position: relative;
  overflow: hidden;
}

.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  transform: translateX(-101%);
  transition: transform var(--transition-slow);
}

.nav-menu a:hover::after,
.nav-menu a:focus::after {
  transform: translateX(0);
}

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 101;
}

.mobile-nav-toggle .icon-menu,
.mobile-nav-toggle .icon-close {
  display: block;
  width: 28px;
  height: 28px;
  color: var(--color-text-primary);
}

.mobile-nav-toggle .icon-close {
  display: none;
}

@media (max-width: 767px) {
  .nav-menu {
    position: fixed;
    inset: 0;
    background-color: var(--color-bg);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-xl);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    padding: 0;
  }

  body.nav-open .nav-menu {
    transform: translateX(0);
  }

  .nav-menu a {
    font-size: var(--font-size-l);
  }

  .mobile-nav-toggle {
    display: block;
  }

  body.nav-open .mobile-nav-toggle .icon-menu {
    display: none;
  }

  body.nav-open .mobile-nav-toggle .icon-close {
    display: block;
  }
}

/* 5. Cookie Banner */
#cookie-consent-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  padding: var(--space-l);
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-m);
  z-index: 200;
  border-top: var(--border-width) solid var(--color-border);
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.08);
}

#cookie-consent-banner p {
  margin: 0;
  font-size: var(--font-size-s);
}

#accept-cookies {
  background-color: var(--color-primary);
  color: var(--color-surface);
  border: none;
  padding: var(--space-xs) var(--space-l);
  border-radius: var(--border-radius-m);
  cursor: pointer;
  font-weight: var(--font-weight-medium);
  transition: background-color var(--transition-fast),
    transform var(--transition-fast);
}

#accept-cookies:hover {
  background-color: var(--color-secondary);
  transform: translateY(-2px);
}

/* 6. Section Specific Styling */

/* Hero Section */
.hero-section {
  text-align: center;
  padding-top: var(--space-xxxl);
  padding-bottom: var(--space-xxxl);
  display: flex;
  align-items: center;
  min-height: 70vh;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-icon {
  margin-bottom: var(--space-xl);
  color: var(--color-primary);
}

.hero-icon svg {
  width: 64px;
  height: 64px;
  stroke-width: 1.5;
}

.hero-section h1 {
  margin-bottom: var(--space-m);
}

.hero-section .subtitle {
  font-size: var(--font-size-l);
  color: var(--color-text-secondary);
  max-width: 65ch;
  margin: 0 auto var(--space-xl) auto;
}

.cta-button {
  display: inline-block;
  background-color: var(--color-primary);
  color: var(--color-surface);
  padding: var(--space-m) var(--space-xl);
  border-radius: var(--border-radius-m);
  font-size: var(--font-size-m);
  font-weight: var(--font-weight-bold);
  transition: background-color var(--transition-fast),
    transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: var(--shadow-soft);
}

.cta-button:hover {
  background-color: var(--color-secondary);
  color: var(--color-surface);
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
}

/* Story Section */
.story-section {
  background-color: var(--color-surface);
}

.story-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xxl);
  align-items: center;
}

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

.story-image-container {
  position: relative;
}

.story-image-container img {
  box-shadow: var(--shadow-hard);
}

.story-text h2 {
  margin-bottom: var(--space-xl);
}

.story-text p {
  color: var(--color-text-secondary);
}

/* Confidence Section (Features) */
.confidence-section {
  text-align: center;
}

.confidence-section .section-intro {
  max-width: 70ch;
  margin: 0 auto var(--space-xxl) auto;
}

.feature-card {
  background-color: var(--color-surface);
  padding: var(--space-xl);
  border-radius: var(--border-radius-l);
  border: var(--border-width) solid var(--color-border);
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition-slow),
    box-shadow var(--transition-slow);
  text-align: left;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-medium);
}

.feature-icon {
  display: inline-flex;
  padding: var(--space-m);
  background-color: color-mix(in srgb, var(--color-primary) 15%, transparent);
  border-radius: 50%;
  margin-bottom: var(--space-l);
  color: var(--color-primary);
}

.feature-icon svg {
  width: 32px;
  height: 32px;
}

.feature-card h3 {
  margin-bottom: var(--space-m);
}

/* Exercise Section (Tabs) */
.exercise-section {
  background-color: var(--color-surface);
}

.exercise-section .section-intro {
  text-align: center;
  max-width: 70ch;
  margin: 0 auto var(--space-xxl) auto;
}

.tabs-container {
  max-width: 900px;
  margin: 0 auto;
}

.tabs-nav {
  display: flex;
  gap: var(--space-s);
  border-bottom: var(--border-width) solid var(--color-border);
  margin-bottom: var(--space-xl);
  overflow-x: auto;
}

.tab-link {
  padding: var(--space-m) var(--space-l);
  cursor: pointer;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  font-size: var(--font-size-m);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast), border-color var(--transition-fast);
  flex-shrink: 0;
}

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

.tab-link.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

.tab-content {
  display: none;
  animation: fadeIn 0.5s ease-in-out;
}

.tab-content.active {
  display: block;
}

.tab-content h3 {
  margin-bottom: var(--space-l);
}

.tab-content ul,
.tab-content ol {
  padding-left: var(--space-l);
}

.tab-content li {
  color: var(--color-text-secondary);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Advice Section */
.advice-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xxl);
  align-items: center;
}

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

.advice-text h2 {
  margin-bottom: var(--space-l);
}

.advice-text ul {
  list-style-type: none;
  padding-left: 0;
}

.advice-text ul li {
  position: relative;
  padding-left: var(--space-xl);
  color: var(--color-text-secondary);
}

.advice-text ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 16px;
  height: 16px;
  background-color: var(--color-secondary);
  mask-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-check-circle"><path d="M22 11.08V12a10 10 0 1 1-5.93-9.14"/><polyline points="22 4 12 14.01 9 11.01"/></svg>');
  mask-size: contain;
  mask-repeat: no-repeat;
}

/* FAQ Section (Accordion) */
.faq-section {
  max-width: 800px;
  margin: 0 auto;
}

.faq-section h2 {
  text-align: center;
  margin-bottom: var(--space-xxl);
}

.accordion details {
  background-color: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--border-radius-m);
  margin-bottom: var(--space-m);
  transition: background-color var(--transition-fast);
}

.accordion details[open] {
  background-color: color-mix(
    in srgb,
    var(--color-accent) 20%,
    var(--color-surface)
  );
}

.accordion summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-l);
  cursor: pointer;
  font-size: var(--font-size-m);
  font-weight: var(--font-weight-bold);
  list-style: none; /* Hides default marker */
}

.accordion summary::-webkit-details-marker {
  display: none; /* Hides default marker for Safari */
}

.accordion summary svg {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
  transition: transform var(--transition-slow);
}

.accordion details[open] summary svg {
  transform: rotate(180deg);
}

.faq-content {
  padding: 0 var(--space-l) var(--space-l) var(--space-l);
  color: var(--color-text-secondary);
}

.faq-content p {
  font-size: var(--font-size-s);
}

/* Testimonials Section */
.testimonials-section {
  background-color: var(--color-surface);
}

.testimonials-section h2 {
  text-align: center;
  margin-bottom: var(--space-xxl);
}

.testimonial-card {
  border: var(--border-width) solid var(--color-border);
  padding: var(--space-xl);
  border-radius: var(--border-radius-m);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.testimonial-card blockquote {
  border-left: none;
  padding-left: 0;
  margin: 0 0 var(--space-l) 0;
  flex-grow: 1;
}

.testimonial-card blockquote p {
  font-style: normal;
}

.testimonial-card cite {
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
}

/* CTA PDF Section */
.cta-pdf-section {
  background-color: var(--color-accent);
  color: var(--color-text-primary);
}

.cta-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xxl);
  align-items: center;
}

@media (min-width: 992px) {
  .cta-grid {
    grid-template-columns: 300px 1fr;
  }
  .cta-image-container {
    justify-self: center;
  }
}

.cta-content h2,
.cta-content h3 {
  color: var(--color-text-primary);
}

.cta-content h3 {
  text-transform: uppercase;
  font-size: var(--font-size-s);
  letter-spacing: 1.5px;
  margin-bottom: var(--space-s);
}

.cta-content h2 {
  margin-bottom: var(--space-m);
}

.cta-content p {
  color: var(--color-text-secondary);
}

.cta-form {
  margin-top: var(--space-xl);
}

.form-fields {
  display: flex;
  flex-direction: column;
  gap: var(--space-m);
}

@media (min-width: 500px) {
  .form-fields {
    flex-direction: row;
    gap: 0;
  }
}

.cta-form input[type="email"] {
  padding: var(--space-m);
  font-size: var(--font-size-m);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--border-radius-m);
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  width: 100%;
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

@media (min-width: 500px) {
  .cta-form input[type="email"] {
    border-right: none;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
  }
}

.cta-form input[type="email"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px
    color-mix(in srgb, var(--color-primary) 25%, transparent);
}

.cta-form button {
  padding: var(--space-m) var(--space-l);
  background-color: var(--color-primary);
  color: var(--color-surface);
  border: none;
  border-radius: var(--border-radius-m);
  font-size: var(--font-size-m);
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  white-space: nowrap;
}

@media (min-width: 500px) {
  .cta-form button {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
  }
}

.cta-form button:hover {
  background-color: var(--color-secondary);
}

.form-privacy {
  font-size: var(--font-size-xs);
  margin-top: var(--space-s);
  color: var(--color-text-secondary);
}

#form-thank-you p {
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

/* 7. Footer */
.main-footer {
  background-color: var(--color-surface);
  padding: var(--space-xxl) 0;
  border-top: var(--border-width) solid var(--color-border);
  font-size: var(--font-size-s);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xxl);
}

@media (min-width: 576px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.footer-col h4 {
  font-size: var(--font-size-m);
  margin-bottom: var(--space-l);
}

.footer-col p {
  color: var(--color-text-secondary);
}

.footer-col ul {
  list-style: none;
  padding: 0;
}

.footer-col ul li {
  margin-bottom: var(--space-s);
}

.footer-col ul a {
  color: var(--color-text-secondary);
}

.footer-col ul a:hover {
  color: var(--color-primary);
}

.footer-contact p {
  margin-bottom: var(--space-xxs);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-xl);
  border-top: var(--border-width) solid var(--color-border);
  color: var(--color-text-secondary);
}

.footer-bottom p {
  font-size: var(--font-size-xs);
  margin: 0;
}

/* 8. Animations & Utilities */

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Delay utilities for staggered animations */
.animate-on-scroll.delay-1 {
  transition-delay: 0.1s;
}
.animate-on-scroll.delay-2 {
  transition-delay: 0.2s;
}
.animate-on-scroll.delay-3 {
  transition-delay: 0.3s;
}

/* Final adjustments for extremely large screens */
@media (min-width: 1600px) {
  .container {
    max-width: 1440px;
  }
  :root {
    --space-xxl: 5rem; /* 80px */
    --space-xxxl: 8rem; /* 128px */
  }
}