/* ============================================
   CARTOON STYLE - COLLECT & EXCHANGE
   Синій фон, жовті акценти, мультяшні формі
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700;800&display=swap');


:root {
  --primary-blue: #1a5f7a;
  --light-blue: #2d7a96;
  --accent-yellow: #f4b860;
  --accent-orange: #ff8c42;
  --text-light: #f5f1e8;
  --text-dark: #2c2c2c;
  --border-color: #333;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

body {
  font-family: 'Montserrat', sans-serif;
  background-image: url('/images/background.png');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  background-repeat: no-repeat;
  color: var(--text-light);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: transparent;
  pointer-events: none;
  z-index: 1;
}

/* ============================================
   ПРИХОВУВАННЯ БОКОВИХ ФОТО НА ВУЗЬКИХ ЕКРАНАХ
   ============================================ */

@media (max-width: 1179px) {
  .side-image {
    display: none;
  }
}

/* ============================================
   ПЛАВНІ ПЕРЕХОДИ МІЖ СТОРІНКАМИ
   ============================================ */

.page-transition {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgb(12 53 83) 0%, rgb(12 53 83) 100%);
  z-index: 999;
  pointer-events: none;
  animation: slideOut 0.6s ease-in-out forwards;
}

@keyframes slideOut {
  from {
    transform: translateY(-100%);
    opacity: 1;
  }
  to {
    transform: translateY(0);
    opacity: 0;
  }
}

/* ============================================
   ЗАКРІПЛЕНІ КАРТИНКИ ПО БОКАМ
   ============================================ */

.side-image {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  pointer-events: none;
}

.side-image img {
  max-width: 250px;
  height: auto;
  object-fit: contain;
}

.left-image {
  left: 0;
  animation: slideInLeft 0.8s ease-out;
}

.right-image {
  right: 0;
  animation: slideInRight 0.8s ease-out;
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateY(-50%) translateX(-100px);
  }
  to {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateY(-50%) translateX(100px);
  }
  to {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
  }
}

/* ============================================
   НАВІГАЦІЯ
   ============================================ */

header {
  background: rgb(12 53 83);
  padding: 1rem 2rem;
  border-bottom: 4px solid var(--accent-yellow);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 101;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  transition: transform 0.4s ease-in-out, opacity 0.4s ease-in-out;
}

header.header-visible {
  transform: translateY(0);
  opacity: 1;
}

header.header-hidden {
  transform: translateY(-100%);
  opacity: 0;
}

.navbar {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 1.8rem;
  font-weight: bold;
  color: var(--accent-yellow);
  text-decoration: none;
  text-shadow: 2px 2px 0 rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease;
}

.logo-img {
  height: 50px;
  width: auto;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
}

.logo:hover {
  transform: scale(1.05);
}

.logo:hover .logo-img {
  box-shadow: 0 4px 12px rgba(244, 184, 96, 0.5);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

nav a {
  color: var(--text-light);
  text-decoration: none;
  font-size: 1rem;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  transition: all 0.3s ease;
  font-weight: 500;
  border: 2px solid transparent;
}

nav a:hover {
  background: var(--accent-yellow);
  color: var(--text-dark);
  transform: translateY(-3px);
  border-color: var(--accent-orange);
}

/* ============================================
   BURGER MENU (MOBILE)
   ============================================ */

.burger-menu {
  display: none;
  flex-direction: column;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  gap: 0.4rem;
}

.burger-line {
  width: 25px;
  height: 3px;
  background: var(--accent-yellow);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.burger-menu.active .burger-line:nth-child(1) {
  transform: rotate(45deg) translate(10px, 10px);
}

.burger-menu.active .burger-line:nth-child(2) {
  opacity: 0;
}

.burger-menu.active .burger-line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

.nav-menu {
  display: flex;
  align-items: center;
  flex: 1;
  justify-content: flex-end;
}

/* ============================================
   MOBILE STYLES (MAX-WIDTH 768px)
   ============================================ */

@media (max-width: 768px) {
  .burger-menu {
    display: flex;
    order: 2;
    margin-left: auto;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgb(12 53 83);
    border-bottom: 4px solid var(--accent-yellow);
    flex-direction: column;
    width: 100%;
    padding: 1rem 0;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    z-index: 100;
    flex: none;
    justify-content: flex-start;
  }

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

  .nav-menu ul {
    flex-direction: column;
    width: 100%;
    gap: 0;
  }

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

  .nav-menu a {
    display: block;
    border-radius: 0;
    border-bottom: 1px solid rgba(244, 184, 96, 0.2);
  }

  .nav-menu a:hover {
    background: rgba(244, 184, 96, 0.15);
  }

  .navbar {
    flex-wrap: nowrap;
    gap: 0.5rem;
  }

  .logo {
    order: 1;
  }

  .logo span {
    font-size: 1.3rem;
  }

  .logo-img {
    height: 40px;
  }
}

/* ============================================
   КОНТЕЙНЕР
   ============================================ */

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 2rem;
  width: 100%;
}

main {
  flex: 1;
  padding: 2rem 0;
  padding-top: 0px;
  position: relative;
  z-index: 2;
}

/* ============================================
   ГЕРОЙ СЕКЦІЯ
   ============================================ */

.hero-section {
  position: relative;
  margin: 8rem 0;
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Unified Hero Block */
.hero-unified-block {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 1000px;
  height: 520px;
  background: linear-gradient(135deg, rgb(12 53 83) 0%, rgb(45 122 150) 50%, var(--accent-yellow) 100%);
  border: 4px solid var(--accent-yellow);
  border-radius: 20px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
  overflow: hidden;
}

.hero-unified-block:hover {
  box-shadow: 0 12px 30px rgba(244, 184, 96, 0.3);
}

/* Hero Unified Side */
.hero-unified-side {
  flex: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 2rem;
  position: relative;
  z-index: 2;
}

.hero-unified-side.left {
  text-align: center;
  background: linear-gradient(90deg, rgba(12, 53, 83, 0.9) 0%, transparent 100%);
}

.hero-unified-side.right {
  text-align: center;
  background: linear-gradient(270deg, rgba(10, 30, 50, 0.9) 0%, rgba(5, 15, 30, 0.8) 50%, transparent 100%);
  border-bottom: none;
}


.hero-unified-side.right label {
  color: var(--text-dark);
  text-shadow: 1px 1px 0 rgba(255, 255, 255, 0.4);
}

/* ============================================
   КАСТОМНИЙ DROPDOWN
   ============================================ */

.custom-dropdown {
  position: relative;
  width: 100%;
  max-width: 280px;
}

.dropdown-toggle {
      background-color: #f4b860;
    /* background: linear-gradient(135deg, rgb(255 255 255 / 98%) 0%, rgba(255, 250, 240, 0.95) 100%); */
    color: rgb(0, 0, 0);
    border: 3px solid rgb(255 255 255 / 90%);
    border-radius: 15px;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: 'Montserrat', sans-serif;
    cursor: pointer;
    transition: all 0.3s 
cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    box-shadow: 0 4px 15px rgba(255, 140, 66, 0.2);
}

.dropdown-toggle .dropdown-arrow:hover{
  color: var(--accent-orange);
}

.dropdown-arrow{
  width: 20px;
  height: 20px;
  color: white;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
}

.custom-dropdown.open .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-toggle:hover{
  background-color: rgba(255, 255, 255, 1);
  box-shadow: 0 8px 25px rgba(255, 255, 255, 0.4);
  border-color: var(--accent-orange);
  transform: translateY(-3px);
}

.dropdown-toggle:active {
  transform: translateY(-1px);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.99) 0%, rgba(255, 250, 240, 0.97) 100%);
  border: 3px solid rgba(255, 140, 66, 0.9);
  border-radius: 15px;
  box-shadow: 0 12px 40px rgba(255, 140, 66, 0.3);
  overflow: hidden;
  display: none;
  z-index: 100;
  animation: slideDownMenu 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.custom-dropdown.open .dropdown-menu {
  display: block;
}

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

.dropdown-item {
  padding: 0.3rem 1.5rem;
  color: rgb(12, 53, 83);
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s ease;
  border-left: 4px solid transparent;
  font-family: 'Montserrat', sans-serif;
}

.dropdown-item:hover {
  background: linear-gradient(90deg, rgba(255, 140, 66, 0.15) 0%, transparent 100%);
  border-left-color: var(--accent-orange);
  padding-left: 1.2rem;
}

.dropdown-item.active {
  background: linear-gradient(135deg, rgba(255, 140, 66, 0.9) 0%, rgba(255, 180, 100, 0.8) 100%);
  color: white;
  border-left-color: white;
  font-weight: 700;
}

/* ============================================
   EXCHANGE ICON WITH ARROWS
   ============================================ */

.exchange-icon-arrows {
  width: 60px;
  height: 60px;
  margin: 0.5rem 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  filter: drop-shadow(0 2px 8px rgba(255, 140, 66, 0.3));
  animation: iconBounce 3s infinite ease-in-out;
  object-fit: contain;
}

@keyframes iconBounce {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

.exchange-icon-arrows:hover {
  filter: drop-shadow(0 4px 12px rgba(255, 140, 66, 0.6));
  animation-duration: 1.5s;
}

.hero-unified-side.right .price-display {
  background: rgba(255, 255, 255, 0.85);
  border: 2px solid rgba(255, 140, 66, 0.8);
  box-shadow: 0 4px 15px rgba(255, 140, 66, 0.3);
}

.hero-unified-side.right .price-value {
  color: rgb(12, 53, 83);
  font-weight: 700;
  font-size: 1.8rem;
  text-shadow: 1px 1px 0 rgba(255, 255, 255, 0.6);
}

.hero-unified-side.right .price-currency {
  color: var(--accent-orange);
  font-weight: 700;
  text-shadow: 1px 1px 0 rgba(255, 255, 255, 0.5);
}

.hero-left {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.hero-right {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  gap: 1.5rem;
}

.converter-title {
  color: white;
  font-size: 1.8rem;
  font-weight: 700;
  margin: 0;
  text-align: center;
  letter-spacing: 1px;
}

.hero h1 {
  font-size: 3.5rem;
  color: var(--accent-yellow);
  text-shadow: 3px 3px 0 rgba(0, 0, 0, 0.5);
  margin-bottom: 1rem;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.hero p {
  font-size: 1.3rem;
  color: var(--text-light);
  margin-bottom: 2rem;
}

.hero-image {
  width: 140px;
  height: 145px;
  margin: 1rem auto;
  border-radius: 50%;
  background-color: var(--accent-yellow);
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  background-attachment: scroll;
  border: 5px solid var(--accent-orange);
  box-shadow: 0 10px 30px rgba(244, 184, 96, 0.6), inset 0 2px 5px rgba(255, 255, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}

@keyframes rotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Текст на жовтому фоні (герой-право) */
.hero-box-right .exchange-card label {
  color: white;
}

.hero-box-right .currency-select {
  background: rgba(255, 255, 255, 0.9);
  color: var(--primary-blue);
  border-color: var(--primary-blue);
  font-weight: 700;
}

.hero-box-right .currency-select option {
  color: var(--primary-blue);
  background: white;
}

.hero-box-right .price-display {
  background: rgba(255, 255, 255, 0.6);
  border-color: var(--primary-blue);
}

.hero-box-right .price-currency {
  color: var(--primary-blue);
  text-shadow: 1px 1px 0 rgba(255, 255, 255, 0.5);
}

.hero-box-right .price-value {
  color: var(--primary-blue);
  text-shadow: 2px 2px 0 rgba(255, 255, 255, 0.5);
}

/* ============================================
   КНОПКИ
   ============================================ */

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  background: var(--accent-yellow);
  color: var(--text-dark);
  text-decoration: none;
  border-radius: 30px;
  border: 3px solid white;
  font-size: 1.1rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.3);
  font-family: Montserrat, sans-serif;
}

.btn:hover {
  background: white;
  border-color: var(--accent-orange);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.3);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.3);
}

.btn-secondary {
  background: var(--light-blue);
  color: var(--text-light);
  border-color: var(--accent-yellow);
}

.btn-secondary:hover {
  background: var(--accent-yellow);
  color: var(--text-dark);
}

/* ============================================
   СЕКЦІЯ КУРСІВ ВАЛЮТ
   ============================================ */

.rates-section {
  margin: 3rem 0 2rem 0;
}

.rates-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 2rem;
}

.exchange-preview {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  background: rgba(12, 53, 83, 0.8);
  border: 3px solid var(--accent-yellow);
  border-radius: 25px;
  padding: 2rem 1.5rem;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
  width: 100%;
  max-width: 400px;
}

.hero-right .exchange-preview {
  padding: 2rem 1.5rem;
}

.exchange-side {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.hero-right .exchange-side {
  min-width: auto;
}

.exchange-side label {
  color: var(--accent-yellow);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.3);
}

.currency-select {
  background: linear-gradient(135deg, rgb(12 53 83) 0%, rgb(26 95 122) 100%);
  color: var(--accent-yellow);
  border: 3px solid var(--accent-yellow);
  border-radius: 15px;
  padding: 1rem 1.5rem;
  font-size: 1.1rem;
  font-weight: 700;
  font-family: 'Montserrat', sans-serif;
  cursor: pointer;
  transition: all 0.3s ease;
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23f4b860' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1.2em;
  padding-right: 3.5rem;
}

.currency-select:hover {
  background-color: rgb(26 95 122);
  box-shadow: 0 6px 20px rgba(244, 184, 96, 0.4);
  transform: translateY(-2px);
}

.currency-select:focus {
  outline: none;
  box-shadow: 0 0 0 4px rgba(244, 184, 96, 0.3), 0 6px 20px rgba(244, 184, 96, 0.4);
  transform: scale(1.02);
}

.currency-select option {
  background: linear-gradient(135deg, rgb(12 53 83) 0%, rgb(26 95 122) 100%);
  color: var(--accent-yellow);
  padding: 1rem 0.8rem;
  margin: 0.3rem 0;
  border-radius: 8px;
  font-weight: 600;
}

.currency-select option:hover {
  background: rgb(45 122 150);
  color: var(--accent-orange);
}

.currency-select option:checked {
  background: linear-gradient(135deg, var(--accent-yellow) 0%, var(--accent-orange) 100%);
  color: var(--text-dark);
  font-weight: 700;
}

.price-display {
  background: linear-gradient(135deg, rgba(244, 184, 96, 0.15), rgba(255, 140, 66, 0.15));
  border: 2px solid var(--accent-yellow);
  border-radius: 15px;
  padding: 1.5rem;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.8rem;
  transition: all 0.3s ease;
}

.price-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent-yellow);
  font-family: 'Courier New', monospace;
  text-shadow: 2px 2px 0 rgba(0, 0, 0, 0.3);
}

.price-currency {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-orange);
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.3);
  letter-spacing: 1px;
}

.exchange-switch {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.arrow {
  font-size: 2.5rem;
  color: var(--accent-yellow);
  text-shadow: 2px 2px 0 rgba(0, 0, 0, 0.3);
  animation: arrowPulse 1.5s ease-in-out infinite;
  font-weight: bold;
}

@keyframes arrowPulse {
  0%, 100% {
    transform: translateX(0);
    opacity: 1;
  }
  50% {
    transform: translateX(5px);
    opacity: 0.8;
  }
}

/* Hero Divider Line */
.hero-divider-line {
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  background: linear-gradient(to bottom, transparent, var(--accent-yellow), var(--accent-yellow), var(--accent-yellow), transparent);
  transform: translateX(-50%) rotate(12deg);
  box-shadow: 0 0 20px rgba(244, 184, 96, 0.8);
  z-index: 5;
  pointer-events: none;
}

/* Converter Input and Output */
.converter-input,
.converter-output {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  margin: 1rem 0;
  align-items: center;
  justify-content: center;
}

/* Exchange Block with Two Sides */
.exchange-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0;
  background: rgba(12, 53, 83, 0.8);
  border: 3px solid var(--accent-yellow);
  border-radius: 20px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
  width: 100%;
  position: relative;
  padding: 0;
  overflow: hidden;
}

.exchange-block:hover {
  background: rgba(12, 53, 83, 0.95);
  box-shadow: 0 12px 25px rgba(244, 184, 96, 0.2);
}

/* Exchange Side (Left and Right parts) */
.exchange-side {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  padding: 2rem;
  position: relative;
  justify-content: center;
  align-items: center;
}

.exchange-side label {
  color: var(--accent-yellow);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.3);
  margin: 0;
}

/* Diagonal Divider Line */
.exchange-divider {
  width: 2px;
  height: 100%;
  background: linear-gradient(to bottom, transparent, var(--accent-yellow), var(--accent-yellow), var(--accent-yellow), transparent);
  position: absolute;
  left: 50%;
  top: 0;
  transform: translateX(-50%) rotate(12deg);
  box-shadow: 0 0 20px rgba(244, 184, 96, 0.8);
  pointer-events: none;
  z-index: 10;
}

@media (max-width: 768px) {
  .exchange-block {
    flex-direction: column;
    gap: 1rem;
  }

  .exchange-divider {
    width: 100%;
    height: 2px;
    margin: 0.5rem 0;
  }

  .exchange-divider::before {
    width: 100%;
    height: 2px;
    transform: rotate(0deg);
  }

  .exchange-preview {
    flex-direction: column;
    gap: 1.5rem;
    padding: 1.5rem;
  }

  .exchange-side {
    width: 100%;
  }

  .exchange-switch {
    transform: rotate(90deg);
  }
}

/* ============================================
   КАРТОЧКИ
   ============================================ */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.card {
  background: rgb(12 53 83);
  border: 3px solid var(--accent-yellow);
  border-radius: 20px;
  padding: 2rem;
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.2);
}

.card:hover {
  transform: translateY(-10px);
  background: rgba(244, 184, 96, 0.2);
  box-shadow: 6px 6px 0 rgba(244, 184, 96, 0.5);
}

.card h3 {
  color: var(--accent-yellow);
  font-size: 1.5rem;
  margin-bottom: 1rem;
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.3);
}

.card p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-light);
}

.card-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
}

.card-icon-img {
  max-width: 100%;
  max-height: 80px;
  object-fit: contain;
  transition: all 0.3s ease;
}

.card:hover .card-icon-img {
  transform: scale(1.1);
}

/* ============================================
   ОБМІННИК
   ============================================ */

.exchange-container {
  background: rgba(255, 255, 255, 0.15);
  border: 4px solid var(--accent-yellow);
  border-radius: 20px;
  padding: 3rem;
  margin: 2rem 0;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.exchange-container h2 {
  color: var(--accent-yellow);
  text-align: center;
  font-size: 2rem;
  margin-bottom: 2rem;
  text-shadow: 2px 2px 0 rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.exchange-icon {
  height: 50px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(2px 2px 4px rgba(0, 0, 0, 0.3));
}

.exchange-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

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

.form-group label {
  color: var(--accent-yellow);
  font-weight: bold;
  margin-bottom: 0.4rem;
  font-size: 1rem;
}

.form-group input,
.form-group select {
  padding: 0.6rem;
  border: 2px solid var(--accent-yellow);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--text-dark);
  font-family: 'Montserrat', sans-serif;
  font-size: 1rem;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  box-shadow: 0 0 0 4px rgba(244, 184, 96, 0.5);
  transform: scale(1.02);
}

.exchange-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.exchange-btn {
  margin-top: 0.5rem;
}

/* Calculation Label */
.calculation-label {
  text-align: center;
  padding: 0.75rem;
  margin: 0.5rem 0;
  background: rgba(244, 184, 96, 0.15);
  border: 2px solid var(--accent-yellow);
  border-radius: 15px;
  color: var(--accent-yellow);
  font-size: 1.1rem;
  font-weight: 700;
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.3);
  display: none;
  animation: slideIn 0.4s ease;
}

.calculation-label.show {
  display: block;
}

.result-box {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(135deg, rgba(76, 175, 80, 0.95), rgba(56, 142, 60, 0.95));
  border-top: 3px solid var(--accent-yellow);
  border-radius: 15px 15px 0 0;
  padding: 2rem;
  text-align: center;
  display: none;
  z-index: 1000;
  box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.3);
}

.result-box.show {
  display: block;
  animation: slideInBottom 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes slideInBottom {
  from {
    opacity: 0;
    transform: translateY(100%);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-box h3 {
  color: var(--accent-yellow);
  margin-bottom: 0.5rem;
}

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

.result-close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  background: transparent;
  border: none;
  color: var(--accent-yellow);
  font-size: 2rem;
  cursor: pointer;
  padding: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
}

.result-close:hover {
  transform: scale(1.2) rotate(90deg);
}

/* ============================================
   ОБРОБКА ПОМИЛОК ФОРМИ
   ============================================ */

.error-box {
  display: none !important;
}

.error-content {
  padding: 1.5rem;
  position: relative;
}

.error-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 1.8rem;
  color: #dc3545;
  cursor: pointer;
  transition: all 0.3s ease;
  line-height: 1;
}

.error-close:hover {
  color: #c82333;
  transform: scale(1.2);
}

.error-box h3 {
  color: #dc3545;
  margin-bottom: 0.5rem;
  font-size: 1.3rem;
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.3);
}

.error-box p {
  color: var(--text-light);
  font-size: 1rem;
  margin: 0;
}

/* Помилки в полях */
.error-text {
  color: #ff6b6b;
  font-size: 0.85rem;
  margin-top: 0.3rem;
  display: block;
  font-weight: 600;
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.2);
}

.form-group input.error,
.form-group select.error {
  border-color: #dc3545 !important;
  background-color: rgba(220, 53, 69, 0.1) !important;
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.2) !important;
}

.form-group input.error::placeholder {
  color: rgba(220, 53, 69, 0.7);
}

.form-group.has-error label {
  color: #ff8a80;
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.3);
}

/* ============================================
   FOOTER
   ============================================ */

footer {
  background: rgb(12 53 83);
  border-top: 4px solid var(--accent-yellow);
  padding: 2rem;
  margin-top: 3rem;
  text-align: center;
  box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.3);
  position: relative;
  z-index: 2;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--accent-yellow);
  text-decoration: none;
  transition: all 0.3s ease;
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--accent-orange);
  transform: scale(1.2);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 1rem 0;
  flex-wrap: wrap;
}

.social-links a {
  width: 57px;
  height: 57px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-yellow);
  color: var(--text-dark);
  text-decoration: none;
  border-radius: 50%;
  transition: all 0.3s ease;
  border: 2px solid var(--text-dark);
  font-weight: bold;
  box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.2);
}

.social-links a:hover {
  background: var(--accent-orange);
  transform: translateY(-5px);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.3);
}

.footer-text {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* ============================================
   БЛОК ІНСТРУКЦІЙ З ФОТО
   ============================================ */

.instruction-image-block {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 3rem 0;
  padding: 0 2rem;
}

.instruction-image {
  height: auto;
  max-width: 500px;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  border: 4px solid var(--accent-yellow);
  transition: all 0.3s ease;
}

.instruction-image:hover {
  transform: scale(1.02);
  box-shadow: 0 15px 40px rgba(244, 184, 96, 0.3);
}

/* ============================================
   АДАПТИВНІСТЬ
   ============================================ */

@media (max-width: 768px) {
  /* Unified Hero Block на планшетах */
  .hero-unified-block {
    flex-direction: column;
    height: auto;
    max-width: 100%;
    background: linear-gradient(180deg, rgb(12 53 83) 0%, rgb(45 122 150) 100%);
  }

  .hero-unified-side {
    width: 100%;
    padding: 2rem 1.5rem;
    border-right: none;
  }

  .hero-unified-side.left {
    border-right: none;
    border-bottom: 2px solid var(--accent-yellow);
    box-shadow: inset 0 -20px 20px rgba(244, 184, 96, 0.8);
  }

  .hero-unified-side.right {
    border-bottom: none;
  }

  .hero-divider-line {
    display: none !important;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero p {
    font-size: 1.1rem;
  }

  nav ul {
    gap: 0.5rem;
  }

  nav a {
    font-size: 0.9rem;
    padding: 0.4rem 0.8rem;
  }

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

  .exchange-container {
    padding: 1rem;
  }

  .form-group input,
  .form-group select,
  .currency-dropdown {
    padding: 0.5rem;
    font-size: 0.9rem;
  }

  .amount-currency-select {
    min-width: 70px;
  }

  footer {
    padding: 1.5rem;
  }

  /* Прибираємо бокові картинки на планшетах */
  .side-image {
    display: none;
  }

  /* Адаптація фото інструкцій */
  .instruction-image {
    max-width: 95%;
    border-radius: 15px;
  }

  .instruction-image-block {
    margin: 2rem 0;
    padding: 0 1rem;
  }

  /* Адаптація діагональної лінії */
  .hero-divider-line {
    display: block;
    width: 100%;
    height: 2px;
    top: 60%;
    left: 0;
    transform: translateY(-50%);
    transform: rotate(0deg) !important;
  }

  /* Адаптація hero на планшетах */
  .hero-section {
    min-height: auto;
    margin: 3rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
  }

  .hero-box {
    width: 90%;
    height: auto;
    min-height: 300px;
    position: relative !important;
    left: auto !important;
    right: auto !important;
    transform: none !important;
    margin: 1.5rem auto;
  }

  .hero-box-left {
    transform: none !important;
    order: 1;
  }

  .hero-box-right {
    transform: none !important;
    order: 2;
  }
}

@media (max-width: 480px) {
  main{
    margin-top: 60px;
  }
  body {
    font-size: 0.95rem;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero {
    padding: 2rem 1rem;
  }

  .container {
    padding: 0 1rem;
  }

  .navbar {
    gap: 1rem;
  }

  nav ul {
    flex-direction: column;
    width: 100%;
    justify-content: center;
  }

  nav a {
    width: 100%;
    text-align: center;
  }

  .btn {
    width: 100%;
    text-align: center;
  }

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

  /* Адаптація для дуже малих екранів */
  .side-image {
    display: none !important;
  }

  .hero-divider-line {
    display: none !important;
  }

  /* Hero-section на мобільних */
  .hero-section {
    min-height: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
  }

  .hero-box {
    width: 95%;
    height: auto;
    min-height: 300px;
    padding: 1.5rem 0.5rem;
    position: relative !important;
    left: auto !important;
    right: auto !important;
    transform: none !important;
    margin: 1rem auto;
  }

  .hero-box-left {
    transform: none !important;
    order: 1;
  }

  .hero-box-right {
    transform: none !important;
    order: 2;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero-image {
    width: 150px;
    height: 150px;
  }

  .instruction-image {
    max-width: 100%;
    border-radius: 12px;
    max-height: 550px;
  }

  .instruction-image-block {
    margin: 1.5rem 0;
    padding: 0 0.5rem;
  }

  .hero-content {
    flex-direction: column;
    padding: 1rem;
  }

  .hero-right {
    min-width: 100%;
    margin-top: 1rem;
  }

  .exchange-container {
    padding: 1rem;
  }
}

/* ============================================
   EXCHANGE MODE BUTTONS & FLIP ANIMATION
   ============================================ */

.exchange-mode-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.mode-btn {
  padding: 0.75rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border: 2px solid var(--accent-yellow);
  background: transparent;
  color: var(--accent-yellow);
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.3s ease;
  font-family: 'Montserrat', sans-serif;
}

.mode-btn:hover {
  background: rgba(244, 184, 96, 0.1);
  transform: translateY(-2px);
}

.mode-btn.active {
  background: var(--accent-yellow);
  color: var(--primary-blue);
  font-weight: 700;
  box-shadow: 0 8px 16px rgba(244, 184, 96, 0.3);
}

.exchange-form-wrapper {
  perspective: 1200px;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.exchange-form-wrapper.flip {
  animation: flipFormSmooth 0.6s ease-in-out;
}

@keyframes flipFormSmooth {
  0% {
    opacity: 1;
  }
  45% {
    opacity: 0;
    transform: scaleX(0.8);
  }
  50% {
    transform: scaleX(-0.8);
    opacity: 0;
  }
  55% {
    opacity: 0;
    transform: scaleX(-0.8);
  }
  100% {
    opacity: 1;
    transform: scaleX(1);
  }
}

.exchange-form {
  width: 100%;
  transition: none;
}

/* Amount Input Row - Dropdown and Input on Same Row */
.amount-input-row {
  display: flex;
  align-items: stretch;
  gap: 0.5rem;
}

.currency-dropdown {
  padding: 0.6rem;
  border: 2px solid var(--accent-yellow);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--text-dark);
  font-family: 'Montserrat', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.currency-dropdown:focus {
  outline: none;
  box-shadow: 0 0 0 4px rgba(244, 184, 96, 0.5);
  transform: scale(1.02);
}

.currency-dropdown:hover {
  background: rgba(244, 184, 96, 0.2);
  border-color: var(--accent-orange);
}

.amount-currency-select {
  flex: 0 0 auto;
  min-width: 90px;
  text-align: center;
}

.amount-input-row input {
  flex: 1;
  min-width: 0;
}

.exchange-form.sell-mode {
  transform: scaleX(-1);
}

.exchange-form.sell-mode input,
.exchange-form.sell-mode select,
.exchange-form.sell-mode label,
.exchange-form.sell-mode button,
.exchange-form.sell-mode span {
  transform: scaleX(-1);
}

.exchange-form.sell-mode .calculation-label {
  transform: scaleX(-1);
}

@media (max-width: 768px) {
  .exchange-mode-buttons {
    gap: 0.5rem;
    margin-bottom: 1.5rem;
  }

  .mode-btn {
    padding: 0.6rem 1.5rem;
    font-size: 0.9rem;
  }

  .amount-input-row {
    gap: 0.5rem;
  }

  .amount-currency-select {
    min-width: 80px;
  }
}