/* ==========================================================================
   1. CSS Variables & Theming
   ========================================================================== */

:root {
  /* Light Theme */
  --color-bg: #f8f9fa;
  --color-bg-alt: #ffffff;
  --color-bg-accent: #e9ecef;
  --color-text: #212529;
  --color-text-muted: #6c757d;
  --color-border: #dee2e6;
  --color-primary: #0d6efd;
  --color-primary-hover: #0b5ed7;
  --color-accent: #6f42c1;
  --color-accent-hover: #59359a;
  --color-success: #198754;
  --color-warning: #ffc107;
  --color-income: #20c997;
  --color-expenses: #fd7e14;
  --color-savings: #0dcaf0;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 5px 15px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.08);

  /* Typography */
  --font-family-sans: "system-ui", -apple-system, "BlinkMacSystemFont",
    "Segoe UI", "Roboto", "Helvetica Neue", "Arial", "Noto Sans", sans-serif;
  --font-family-serif: "Georgia", "Times New Roman", serif;
  --font-size-base: 1rem;
  --line-height-base: 1.65;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;

  /* Other */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --transition-speed: 0.3s;
  --container-width: 1320px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #121212;
    --color-bg-alt: #1e1e1e;
    --color-bg-accent: #2a2a2a;
    --color-text: #e8e6e3;
    --color-text-muted: #a8a8a8;
    --color-border: #3a3a3a;
    --color-primary: #58a6ff;
    --color-primary-hover: #79b8ff;
    --color-accent: #9b72e9;
    --color-accent-hover: #ad8cff;
    --color-success: #3fb950;
    --color-warning: #e3b341;
    --color-income: #30d4a3;
    --color-expenses: #ff9d4b;
    --color-savings: #39c5f0;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 5px 15px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.4);
  }
}

/* ==========================================================================
     2. Global Resets & Base Styles
     ========================================================================== */

*,
*::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 {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  transition: background-color var(--transition-speed) ease,
    color var(--transition-speed) ease;
}

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

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

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

h1,
h2,
h3,
h4,
h5,
h6 {
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
  font-weight: 600;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
}
h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}
h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}
h4 {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
}
h5 {
  font-size: clamp(1rem, 2vw, 1.25rem);
}

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

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

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

blockquote {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md) var(--spacing-lg);
  border-left: 4px solid var(--color-accent);
  background-color: var(--color-bg-accent);
  border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
}

blockquote p {
  margin-bottom: var(--spacing-sm);
  font-style: italic;
}

blockquote cite {
  font-style: normal;
  font-weight: 600;
  color: var(--color-text-muted);
}

address {
  font-style: normal;
}

/* ==========================================================================
     3. Layout & Container
     ========================================================================== */

.container {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
  width: 100%;
}

section {
  padding-top: var(--spacing-xxl);
  padding-bottom: var(--spacing-xxl);
}

/* ==========================================================================
     4. Header & Navigation
     ========================================================================== */

.main-header {
  padding: var(--spacing-md) 0;
  background-color: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: background-color var(--transition-speed) ease,
    border-color var(--transition-speed) ease;
}

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

.logo {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
  color: var(--color-accent);
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-lg);
  margin: 0;
  padding: 0;
}

.main-nav a {
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--spacing-sm) 0;
  position: relative;
}

.main-nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-speed) ease;
}

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

.main-nav a:hover::after {
  width: 100%;
}

/* ==========================================================================
     5. Buttons & Interactive Elements
     ========================================================================== */

.button-primary,
.button-accent,
.filter-button {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-weight: 600;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: var(--border-radius-md);
  transition: all var(--transition-speed) ease;
  font-size: 0.95rem;
  line-height: 1.5;
  text-decoration: none;
}

.button-primary:hover,
.button-accent:hover,
.filter-button:hover {
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.button-primary {
  color: #fff;
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.button-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: #fff;
}

.button-accent {
  color: #fff;
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.button-accent:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
}

.filter-section .filter-button {
  background-color: var(--color-bg-alt);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  padding: var(--spacing-xs) var(--spacing-md);
}

.filter-section .filter-button:hover {
  background-color: var(--color-bg-accent);
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

.filter-section .filter-button.active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* ==========================================================================
     6. Hero Section
     ========================================================================== */

.hero-section {
  text-align: center;
  background-color: var(--color-bg-alt);
  padding: calc(var(--spacing-xxl) * 2) 0;
}

.hero-section .subtitle {
  font-size: clamp(1.1rem, 2vw, 1.25rem);
  max-width: 800px;
  margin: var(--spacing-lg) auto var(--spacing-xl) auto;
  color: var(--color-text-muted);
}

/* ==========================================================================
     7. Filter Section
     ========================================================================== */

.filter-section {
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding-top: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
}

.filter-section h2 {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.filter-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-md);
}

.filter-label {
  font-weight: 600;
  color: var(--color-text-muted);
}

/* ==========================================================================
     8. Budget Gallery & Cards
     ========================================================================== */

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

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

.budget-card {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-speed) ease;
  overflow: hidden;
}

.budget-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.budget-card-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.budget-card-header h3 {
  margin: 0;
}

.budget-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-md);
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.budget-meta span {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.budget-meta svg {
  width: 18px;
  height: 18px;
  stroke-width: 2;
  color: var(--color-text-muted);
}

.budget-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background-color: var(--color-border);
}

.summary-item {
  background-color: var(--color-bg-alt);
  padding: var(--spacing-md);
  text-align: center;
}

.summary-item h4 {
  margin-bottom: var(--spacing-xs);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.summary-item p {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
}

.summary-item.income p {
  color: var(--color-income);
}
.summary-item.expenses p {
  color: var(--color-expenses);
}
.summary-item.savings p {
  color: var(--color-savings);
}

.budget-details {
  padding: var(--spacing-lg);
}

.budget-details > h4 {
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.details-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.category-block {
  background-color: var(--color-bg);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--color-border);
}

.category-block h5 {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.1rem;
  color: var(--color-text);
}

.category-block svg {
  width: 22px;
  height: 22px;
  color: var(--color-accent);
}

.category-block ul {
  list-style: none;
  padding: 0;
  margin-top: var(--spacing-md);
  margin-bottom: 0;
  font-size: 0.95rem;
}

.category-block li {
  padding-left: var(--spacing-md);
  position: relative;
  color: var(--color-text-muted);
}

.category-block li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: bold;
}

.budget-card-footer {
  background-color: var(--color-bg-accent);
  padding: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

.budget-card-footer blockquote {
  background: none;
  border: none;
  padding: 0;
  margin: 0;
}

/* ==========================================================================
     9. Spending Highlights
     ========================================================================== */

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

.section-description {
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xl);
}

.spending-highlights h2 {
  text-align: center;
}

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.highlight-item {
  text-align: center;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: transform var(--transition-speed) ease,
    box-shadow var(--transition-speed) ease;
}

.highlight-item:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-lg);
}

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

.highlight-item h3 {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.highlight-item .percentage {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-accent);
  margin: 0;
}

.highlight-item p {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ==========================================================================
     10. Accordion (FAQ & Advice)
     ========================================================================== */

.accordion,
.faq-grid {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.editorial-advice h2,
.faq-section h2 {
  text-align: center;
}

.accordion details,
.faq-grid details {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  overflow: hidden;
}

.accordion summary,
.faq-grid summary {
  padding: var(--spacing-lg);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 1.1rem;
}

.accordion summary:hover,
.faq-grid summary:hover {
  background-color: var(--color-bg-accent);
}

.accordion summary h4,
.faq-grid summary {
  margin: 0;
}

.accordion summary svg,
.faq-grid summary::after {
  transition: transform var(--transition-speed) ease;
}

.faq-grid summary::after {
  content: "+";
  font-size: 2rem;
  font-weight: 300;
  color: var(--color-primary);
}

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

details[open] > summary {
  border-bottom: 1px solid var(--color-border);
}

details[open] > summary::after {
  content: "−";
}

.accordion-content,
.faq-grid p {
  padding: var(--spacing-lg);
  background-color: var(--color-bg-alt);
  color: var(--color-text-muted);
}

.faq-grid p {
  margin-top: 0;
  margin-bottom: 0;
}

/* ==========================================================================
     11. Testimonials
     ========================================================================== */

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

.testimonials-section h2 {
  text-align: center;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.testimonial-item {
  margin: 0;
  padding: var(--spacing-xl);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  position: relative;
}

.testimonial-item::before {
  content: "“";
  font-family: var(--font-family-serif);
  position: absolute;
  top: -10px;
  left: 20px;
  font-size: 6rem;
  line-height: 1;
  color: var(--color-accent);
  opacity: 0.1;
  z-index: 1;
}

.testimonial-item p {
  position: relative;
  z-index: 2;
  font-size: 1.05rem;
}

.testimonial-item cite {
  font-weight: 600;
}

/* ==========================================================================
     12. CTA & Form Section
     ========================================================================== */
.cta-section {
  background-color: var(--color-accent);
  color: #fff;
  text-align: center;
}

.cta-section h2 {
  color: #fff;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.form-container {
  max-width: 500px;
  margin: var(--spacing-xl) auto 0 auto;
  background-color: var(--color-bg-alt);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  text-align: left;
}

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

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition-speed) ease,
    box-shadow var(--transition-speed) ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.25);
}

.form-container .button-accent {
  width: 100%;
  padding: var(--spacing-md);
  font-size: 1.1rem;
}

#form-success-message {
  text-align: center;
  color: var(--color-text);
}
#form-success-message h3 {
  color: var(--color-success);
}

/* ==========================================================================
     13. Footer
     ========================================================================== */
.main-footer {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-xxl) 0 0 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
}

.footer-column h4 {
  color: var(--color-text);
  font-size: 1.1rem;
  margin-bottom: var(--spacing-md);
}

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

.footer-column li {
  margin-bottom: var(--spacing-sm);
}

.footer-column a {
  color: var(--color-text-muted);
}

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

.footer-bottom {
  padding: var(--spacing-lg) 0;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-bottom p {
  margin: 0;
}

.footer-bottom ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: var(--spacing-lg);
}

/* ==========================================================================
     14. Cookie Consent Banner
     ========================================================================== */
#cookie-consent-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--color-bg-alt);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  z-index: 1001;
  padding: var(--spacing-md) 0;
  border-top: 1px solid var(--color-border);
  transform: translateY(100%);
  transition: transform 0.5s ease-in-out;
}

#cookie-consent-banner.active {
  transform: translateY(0);
}

#cookie-consent-banner .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

#cookie-consent-banner p {
  margin: 0;
  color: var(--color-text-muted);
}

#cookie-consent-banner a {
  text-decoration: underline;
}

#cookie-accept-button {
  white-space: nowrap;
  background-color: var(--color-primary);
  color: #fff;
  border: none;
  padding: var(--spacing-sm) var(--spacing-xl);
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: background-color var(--transition-speed) ease;
}
#cookie-accept-button:hover {
  background-color: var(--color-primary-hover);
}

/* ==========================================================================
     15. Scroll Animations & Helpers
     ========================================================================== */
.fade-in-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* ==========================================================================
     16. Responsiveness
     ========================================================================== */
@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-column.about {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-lg);
  }
  .main-nav.nav-active {
    display: block;
  }
  .main-nav ul {
    flex-direction: column;
    align-items: center;
  }
  .menu-toggle {
    display: block;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* Hamburger Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 25px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 10;
}

.menu-toggle:focus {
  outline: none;
}

.menu-toggle .bar {
  width: 30px;
  height: 3px;
  background-color: var(--color-text);
  border-radius: 10px;
  transition: all 0.3s linear;
  position: relative;
  transform-origin: 1px;
}

@media (max-width: 768px) {
  .main-header .button-primary {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  body.nav-active .menu-toggle .bar:nth-child(1) {
    transform: rotate(45deg);
  }
  body.nav-active .menu-toggle .bar:nth-child(2) {
    opacity: 0;
    transform: translateX(20px);
  }
  body.nav-active .menu-toggle .bar:nth-child(3) {
    transform: rotate(-45deg);
  }
  .details-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 576px) {
  #cookie-consent-banner .container {
    flex-direction: column;
    text-align: center;
  }
  .filter-controls {
    flex-direction: column;
    align-items: stretch;
  }
  .filter-group {
    flex-direction: column;
    align-items: stretch;
  }
  .filter-button {
    width: 100%;
  }
}