/*
Theme Name: Calcul TVA
Theme URI: https://calcul-tva.local
Description: A modern, professional VAT calculator WordPress theme with country-specific pages and comprehensive SEO optimization
Version: 1.0.0
Author: Your Name
Author URI: https://calcul-tva.local
License: GPL v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: calcul-tva
Domain Path: /languages
Tags: calculator, vat, tva, ecommerce, responsive, seo
*/

/* ==========================================
   CUSTOM PROPERTIES / CSS VARIABLES
   ========================================== */
:root {
  --primary-color: #1a2620;
  --secondary-color: #f4a261;
  --text-color: #333333;
  --light-text: #666666;
  --border-color: #e0e0e0;
  --background-color: #ffffff;
  --light-background: #f8f9fa;
  --success-color: #28a745;
  --danger-color: #dc3545;
  --spacing-unit: 1rem;
  --border-radius: 0.375rem;
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-family-heading: 'Segoe UI', Trebuchet MS, sans-serif;
}

/* ==========================================
   RESET & BASE STYLES
   ========================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  color: var(--text-color);
  background-color: var(--background-color);
  line-height: 1.6;
  font-size: 16px;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--secondary-color);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  line-height: 1.2;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

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

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

/* ==========================================
   CONTAINER & LAYOUT
   ========================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-unit);
}

.row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-unit);
}

.row.two-col {
  grid-template-columns: repeat(2, 1fr);
}

.row.three-col {
  grid-template-columns: repeat(3, 1fr);
}

/* ==========================================
   HEADER & NAVIGATION
   ========================================== */
.site-header {
  background-color: var(--primary-color);
  color: white;
  padding: var(--spacing-unit) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-unit);
}

.site-logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--secondary-color);
}

.site-logo a {
  color: var(--secondary-color);
}

.main-nav {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.main-nav li {
  position: relative;
}

.main-nav .sub-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background-color: var(--primary-color);
  list-style: none;
  padding: 0.5rem 0;
  border-radius: var(--border-radius);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  z-index: 1001;
}

.main-nav li:hover > .sub-menu,
.main-nav li:focus-within > .sub-menu {
  display: block;
}

.main-nav .sub-menu li {
  width: 100%;
}

.main-nav .sub-menu a {
  display: block;
  padding: 0.6rem 1rem;
  white-space: nowrap;
}

.main-nav a {
  color: white;
  font-weight: 500;
  transition: color 0.3s ease;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--secondary-color);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
}

/* ==========================================
   RESPONSIVE MOBILE MENU
   ========================================== */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--primary-color);
    gap: 0;
    display: none;
    z-index: 999;
  }

  .main-nav.active {
    display: flex;
  }

  .main-nav li {
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }

  .main-nav a {
    display: block;
    padding: 0.75rem 1rem;
  }

  .main-nav .sub-menu {
    position: static;
    display: block;
    min-width: 100%;
    box-shadow: none;
    border-radius: 0;
    padding: 0;
    background-color: rgba(0, 0, 0, 0.12);
  }

  .main-nav .sub-menu a {
    padding-left: 2rem;
  }
}

/* ==========================================
   FOOTER
   ========================================== */
.site-footer {
  background-color: var(--primary-color);
  color: white;
  padding: 3rem var(--spacing-unit) 1rem;
  margin-top: 4rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  color: var(--secondary-color);
  margin-bottom: 1rem;
}

.footer-section a {
  color: #ccc;
  display: block;
  padding: 0.5rem 0;
}

.footer-section a:hover {
  color: var(--secondary-color);
}

.footer-bottom {
  text-align: center;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1rem;
  color: #999;
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, rgba(26, 38, 32, 0.9) 100%);
  background-attachment: fixed;
  color: white;
  padding: 6rem var(--spacing-unit);
  text-align: center;
}

.hero-section h1 {
  color: white;
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero-section p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

.hero-cta {
  display: inline-block;
  background-color: var(--secondary-color);
  color: var(--primary-color);
  padding: 1rem 2rem;
  border-radius: var(--border-radius);
  font-weight: bold;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(0,0,0,0.2);
  color: var(--primary-color);
}

/* ==========================================
   CALCULATOR CARD
   ========================================== */
.calculator-card {
  background-color: var(--light-background);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  margin: 2rem 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.calculator-card h2 {
  margin-top: 0;
  margin-bottom: 1.5rem;
  text-align: center;
}

.calc-form {
  display: grid;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

.form-group input,
.form-group select {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-family: var(--font-family-base);
  transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(26, 38, 32, 0.1);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

@media (max-width: 640px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.calc-button {
  background-color: var(--primary-color);
  color: white;
  padding: 0.875rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.calc-button:hover {
  background-color: var(--secondary-color);
  color: var(--primary-color);
  transform: translateY(-2px);
}

.calc-result {
  background-color: white;
  border-left: 4px solid var(--secondary-color);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  margin-top: 1.5rem;
  display: none;
}

.calc-result.active {
  display: block;
  animation: slideIn 0.3s ease;
}

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

.result-item {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
}

.result-item:last-child {
  border-bottom: none;
}

.result-label {
  font-weight: 600;
  color: var(--primary-color);
}

.result-value {
  font-weight: bold;
  color: var(--secondary-color);
  font-size: 1.1rem;
}

/* ==========================================
   COUNTRY GRID
   ========================================== */
.country-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.country-card {
  background-color: white;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.country-card:hover {
  border-color: var(--secondary-color);
  box-shadow: 0 4px 12px rgba(244, 162, 97, 0.15);
  transform: translateY(-4px);
}

.country-card a {
  display: block;
  color: var(--primary-color);
  font-weight: 600;
  font-size: 1rem;
}

.country-card .rate {
  color: var(--light-text);
  font-size: 0.875rem;
  margin-top: 0.5rem;
}

/* ==========================================
   FAQ ACCORDION
   ========================================== */
.faq-section {
  margin: 3rem 0;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  overflow: hidden;
}

.faq-question {
  background-color: var(--light-background);
  padding: 1.25rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--primary-color);
  transition: background-color 0.3s ease;
  border: none;
  width: 100%;
  text-align: left;
  font-size: 1rem;
}

.faq-question:hover {
  background-color: #f0f0f0;
}

.faq-question.active {
  background-color: var(--primary-color);
  color: white;
}

.faq-toggle {
  display: inline-block;
  transition: transform 0.3s ease;
}

.faq-toggle.active {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 1.25rem;
  background-color: var(--light-background);
  display: none;
  line-height: 1.8;
  color: var(--text-color);
}

.faq-answer.active {
  display: block;
  animation: slideDown 0.3s ease;
}

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

/* ==========================================
   VAT RATES TABLE
   ========================================== */
.vat-rates-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.vat-rates-table th {
  background-color: var(--primary-color);
  color: white;
  padding: 1rem;
  text-align: left;
  font-weight: 600;
}

.vat-rates-table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

.vat-rates-table tbody tr:hover {
  background-color: var(--light-background);
}

.vat-rates-table tbody tr:nth-child(even) {
  background-color: #fafafa;
}

/* ==========================================
   BLOG/SINGLE POST
   ========================================== */
.post-content {
  max-width: 800px;
  margin: 0 auto;
}

.post-meta {
  color: var(--light-text);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.post-meta span {
  margin-right: 1.5rem;
}

.post-thumbnail {
  width: 100%;
  height: 400px;
  object-fit: cover;
  margin-bottom: 2rem;
  border-radius: var(--border-radius);
}

.post-navigation {
  display: flex;
  justify-content: space-between;
  margin: 3rem 0;
  padding: 2rem 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.nav-link {
  flex: 1;
}

.nav-link.prev {
  text-align: left;
}

.nav-link.next {
  text-align: right;
}

.nav-link a {
  display: block;
  color: var(--primary-color);
  font-weight: 600;
  transition: color 0.3s ease;
}

.nav-link a:hover {
  color: var(--secondary-color);
}

/* ==========================================
   SIDEBAR
   ========================================== */
.sidebar {
  background-color: var(--light-background);
  padding: 1.5rem;
  border-radius: var(--border-radius);
}

.sidebar h3 {
  margin-top: 0;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--secondary-color);
  padding-bottom: 0.5rem;
}

.sidebar ul {
  list-style: none;
}

.sidebar li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-color);
}

.sidebar li:last-child {
  border-bottom: none;
}

.sidebar a {
  color: var(--primary-color);
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

.sidebar a:hover {
  color: var(--secondary-color);
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.section-padding {
  padding: 3rem var(--spacing-unit);
}

.section-title {
  text-align: center;
  margin-bottom: 2rem;
}

.section-title h2 {
  margin-bottom: 0.5rem;
}

.section-title p {
  color: var(--light-text);
  font-size: 1.1rem;
}

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

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

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

.button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: var(--primary-color);
  color: white;
  border-radius: var(--border-radius);
  font-weight: 600;
  transition: all 0.3s ease;
  text-align: center;
}

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

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

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

/* ==========================================
   LISTING PAGES
   ========================================== */
.listing-hero {
  background: linear-gradient(135deg, #f6f8f7 0%, #eef2f0 100%);
  border-bottom: 1px solid var(--border-color);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.blog-card {
  background-color: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.25rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.blog-card:hover {
  transform: translateY(-3px);
  border-color: #d2d8d5;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.blog-card h2 {
  font-size: 1.1rem;
  line-height: 1.35;
  margin-bottom: 0.6rem;
}

.blog-card-link {
  color: var(--primary-color);
}

.blog-card-meta {
  font-size: 0.875rem;
  color: var(--light-text);
  margin-bottom: 0.65rem;
}

.country-grid-large {
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}

.country-card-rich p {
  margin-top: 0.65rem;
  color: var(--light-text);
  font-size: 0.95rem;
}

.country-card-rich .button {
  margin-top: 0.8rem;
}

/* ==========================================
   BREADCRUMB
   ========================================== */
.breadcrumb {
  display: flex;
  gap: 0.5rem;
  margin: 1rem 0;
  font-size: 0.9rem;
  color: var(--light-text);
}

.breadcrumb a {
  color: var(--primary-color);
}

.breadcrumb span {
  margin: 0 0.5rem;
}

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 768px) {
  .hero-section h1 {
    font-size: 2rem;
  }

  .hero-section p {
    font-size: 1rem;
  }

  .row {
    grid-template-columns: 1fr;
  }

  .row.two-col,
  .row.three-col {
    grid-template-columns: 1fr;
  }

  .country-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }

  .post-navigation {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-link.next {
    text-align: left;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 14px;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.25rem;
  }

  .hero-section {
    padding: 3rem var(--spacing-unit);
  }

  .calculator-card {
    padding: 1.5rem;
  }

  .country-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}