body {
    margin: 0;
    font-family: 'Arial', sans-serif;
    background-image: url('background-travel.png');
    background-size: cover;
    background-position: center;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    text-align: center;
}

.container {
    background-color: rgba(0, 0, 0, 0.6);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
    max-width: 1200px;
    width: 90%;
}

header h1 {
    font-size: 3em;
    margin-bottom: 10px;
    line-height: 1.3;
    color: #f0e68c; /* Khaki */
}

.subtitle {
    font-size: 1.2em;
    margin-bottom: 30px;
    color: #eee;
}

main {
    padding: 20px 0;
}

.exclusive-packages h2 {
    font-size: 2.2em;
    color: #ffd700; /* Gold */
    margin-bottom: 30px;
}

.packages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.package-card {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 25px;
    text-align: left;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    backdrop-filter: blur(3px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    flex-direction: column;
}

.package-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 25px rgba(0,0,0,0.5);
}

.package-card h3 {
    font-size: 1.6em;
    color: #f0e68c;
    margin-top: 0;
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    padding-bottom: 15px;
}

.package-details h4 {
    font-size: 1.1em;
    color: #00ced1; /* DarkTurquoise */
    margin-top: 15px;
    margin-bottom: 8px;
}

.package-details p, .package-details ul {
    font-size: 0.95em;
    color: #eee;
    line-height: 1.6;
    margin: 0 0 15px 0;
    padding-left: 0;
}

.package-details ul {
    list-style-type: none;
    padding-left: 5px;
}

.package-details li {
    margin-bottom: 8px;
    padding-left: 1.2em;
    position: relative;
}

.package-details li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: #ffd700;
    font-weight: bold;
}

/* Booking Form Styles */
.booking-form {
    margin-top: 50px;
    padding: 30px;
    background-color: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(3px);
}

.booking-form h2 {
    font-size: 2.2em;
    color: #ffd700;
    margin-bottom: 10px;
}

.booking-form p {
    font-size: 1.1em;
    color: #eee;
    margin-bottom: 30px;
}

#customer-form {
    text-align: left;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

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

.form-group.form-group-span-2 {
    grid-column: span 2;
}

@media (max-width: 620px) {
    .form-group.form-group-span-2 {
        grid-column: span 1;
    }
}

.form-group label {
    margin-bottom: 8px;
    font-weight: bold;
    color: #f0e68c;
    font-size: 0.95em;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 5px;
    color: #fff;
    font-size: 1em;
    box-sizing: border-box; /* Ensures padding doesn't affect width */
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #ccc;
}

.form-group input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
    cursor: pointer;
}

select:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23f0e68c' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1em;
}

.form-group select option {
    background-color: #333;
    color: #fff;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.travelers-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.travelers-group input {
    width: 60px;
    flex-grow: 0;
}

.travelers-group span {
    color: #eee;
}

#customer-form .cta-button {
    margin-top: 30px;
    width: 100%;
    text-align: center;
    border: none;
    cursor: pointer;
}

.packages {
    display: none;
}

.card {
    display: none;
}

.card img {
    display: none;
}

.card h3 {
    display: none;
}

.card p {
    display: none;
}

.btn-details {
    display: inline-block;
    background-color: #00ced1; /* DarkTurquoise */
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background-color 0.3s;
}

.btn-details:hover {
    background-color: #20b2aa; /* LightSeaGreen */
}

.cta-button {
    display: inline-block;
    background-color: #ff6347; /* Tomato */
    color: white;
    padding: 15px 30px;
    text-decoration: none;
    font-size: 1.2em;
    font-weight: bold;
    border-radius: 8px;
    transition: background-color 0.3s ease, transform 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
}

.cta-button:hover {
    background-color: #ff4500; /* OrangeRed */
    transform: translateY(-2px);
}

/* Vocabulary Exercise Styles */
.vocabulary-exercise {
    margin-top: 50px;
    padding: 30px;
    background-color: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(3px);
    text-align: center;
}

.vocabulary-exercise h2 {
    font-size: 2.2em;
    color: #ffd700;
    margin-bottom: 10px;
}

.vocabulary-exercise p {
    font-size: 1.1em;
    color: #eee;
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.exercise-area {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
    align-items: flex-start;
}

.items-container {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    padding: 20px;
    border: 1px dashed rgba(255, 255, 255, 0.3);
    flex-basis: 250px;
    flex-grow: 1;
}

.items-container h3 {
    margin-top: 0;
    color: #f0e68c;
}

#items-pool {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    min-height: 50px;
}

.draggable-item {
    background-color: #00ced1;
    color: #111;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: grab;
    transition: background-color 0.3s, transform 0.3s;
    font-weight: bold;
    user-select: none;
    border: 2px solid transparent;
}

.draggable-item.dragging {
    opacity: 0.5;
    cursor: grabbing;
    transform: scale(1.1);
}

.draggable-item.correct-drop {
    background-color: #32cd32; /* LimeGreen */
    border-color: #98fb98; /* PaleGreen */
    cursor: default;
}

.draggable-item.incorrect-drop {
    background-color: #ff6347; /* Tomato */
    border-color: #ffcccb; /* LightCoral */
    animation: shake 0.5s;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.suitcases-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    flex-basis: 60%;
    flex-grow: 2;
    justify-content: center;
}

.suitcase {
    background: rgba(0, 0, 0, 0.4);
    border-radius: 10px;
    padding: 15px;
    text-align: center;
    flex: 1;
    min-width: 220px;
}

.suitcase h4 {
    margin: 0 0 15px 0;
    color: #f0e68c;
    font-size: 1.2em;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.suitcase h4 img {
    height: 30px;
}

.drop-zone {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    min-height: 150px;
    padding: 10px;
    border: 2px dashed #aaa;
    transition: background-color 0.3s, border-color 0.3s;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-content: flex-start;
}

.drop-zone.drag-over {
    background-color: rgba(255, 215, 0, 0.2);
    border-color: #ffd700;
}

.feedback-message {
    margin-top: 20px;
    font-size: 1.1em;
    font-weight: bold;
    min-height: 1.5em;
    transition: color 0.3s;
}

.feedback-message.correct {
    color: #98fb98;
}

.feedback-message.incorrect {
    color: #ffcccb;
}

#reset-vocab-btn {
    margin-top: 20px;
    background-color: #00ced1;
}

#reset-vocab-btn:hover {
     background-color: #20b2aa;
}

/* Travel Quiz Styles */
.travel-quiz {
    margin-top: 50px;
    padding: 30px;
    background-color: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(3px);
    text-align: center;
}

.travel-quiz h2 {
    font-size: 2.2em;
    color: #ffd700;
    margin-bottom: 10px;
}

.travel-quiz p {
    font-size: 1.1em;
    color: #eee;
    margin-bottom: 30px;
}

#quiz-container {
    text-align: left;
    margin-bottom: 30px;
}

.quiz-question {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    border-left: 5px solid #00ced1;
    transition: all 0.3s ease;
    position: relative;
}

.quiz-question.correct {
    border-left-color: #32cd32;
    background: rgba(50, 205, 50, 0.1);
}

.quiz-question.incorrect {
    border-left-color: #ff6347;
    background: rgba(255, 99, 71, 0.1);
}

.question-text {
    font-size: 1.2em;
    font-weight: bold;
    color: #f0e68c;
    margin-bottom: 15px;
}

.quiz-answer-input {
    width: 100%;
    padding: 12px;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 5px;
    color: #fff;
    font-size: 1em;
    box-sizing: border-box;
    transition: border-color 0.3s;
}

.quiz-answer-input.correct {
    border-color: #32cd32;
    background-color: rgba(50, 205, 50, 0.1);
}

.quiz-answer-input.incorrect {
    border-color: #ff6347;
    background-color: rgba(255, 99, 71, 0.1);
}

.correct-answer-display {
    display: block;
    margin-top: 10px;
    color: #98fb98;
    font-weight: bold;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.quiz-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    border-radius: 5px;
    transition: background-color 0.2s;
}

.quiz-option label {
    color: #eee;
    cursor: pointer;
    flex-grow: 1;
}

.quiz-option input[type="radio"] {
    accent-color: #ffd700;
    cursor: pointer;
    flex-shrink: 0;
}

.quiz-option:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.quiz-option.correct-answer {
    background-color: rgba(50, 205, 50, 0.2);
    font-weight: bold;
}

.quiz-option.correct-answer label {
    color: #98fb98;
}

.quiz-option.incorrect-answer {
    background-color: rgba(255, 99, 71, 0.2);
}

.quiz-option.incorrect-answer label {
    text-decoration: line-through;
    opacity: 0.7;
}

#submit-quiz-btn, #reset-quiz-btn {
    margin-top: 20px;
}

#reset-quiz-btn {
    background-color: #00ced1;
}

#reset-quiz-btn:hover {
    background-color: #20b2aa;
}

#excursions-container {
    grid-column: 1 / -1;
}

#excursions-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 10px;
    background-color: rgba(0, 0, 0, 0.2);
    padding: 15px;
    border-radius: 5px;
}

.excursion-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.excursion-item input[type="checkbox"] {
    width: auto;
    accent-color: #ffd700;
}

.excursion-item label {
    font-weight: normal;
    color: #eee;
    margin-bottom: 0;
}

footer {
    margin-top: 40px;
    font-size: 0.9em;
    color: #ccc;
}