:root {
    --primary-color: oklch(65% 0.2 260);
    --background-color: oklch(98% 0.01 260);
    --text-color: oklch(25% 0.05 260);
    --shadow-color: oklch(25% 0.05 260 / 40%);
    --border-radius: 12px;
    --spacing-unit: 1rem;
}

body {
    font-family: "ARIAL", sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-unit) * 2;
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-unit) * 1.5 var(--spacing-unit) * 2;
    text-align: center;
    box-shadow: 0 4px 8px var(--shadow-color);
}

header h1 {
    color: white;
    font-size: 2.5rem;
    margin: 0;
}

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

main {
    padding: var(--spacing-unit) * 2 0;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-unit);
    background-color: white;
    padding: var(--spacing-unit) * 1.5;
    border-radius: var(--border-radius);
    box-shadow: 0 8px 16px var(--shadow-color);
    margin-bottom: var(--spacing-unit) * 2;
    justify-content: center;
    align-items: flex-end;
}

.input-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 0.5rem;
}

.input-group label {
    margin-bottom: 0.3rem;
    font-size: 0.9rem;
    color: var(--text-color);
    font-weight: bold;
}

.input-group select,
.input-group input[type="date"] {
    padding: 0.6rem 1rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--primary-color);
    font-size: 1rem;
    background-color: var(--background-color);
    color: var(--text-color);
    min-width: 150px;
}

#generate-button {
    background-color: var(--primary-color);
    color: white;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: 0 4px 8px var(--shadow-color);
}

#generate-button:hover {
    background-color: oklch(70% 0.2 260); /* Slightly lighter primary */
    transform: translateY(-2px);
}

#itinerary-container {
    display: grid;
    gap: var(--spacing-unit) * 1.5;
    width: 100%;
}

.itinerary-item {
    background-color: white;
    padding: var(--spacing-unit) * 1.5;
    border-radius: var(--border-radius);
    box-shadow: 0 8px 16px var(--shadow-color);
}

.itinerary-item h2 {
    color: var(--primary-color);
    margin-top: 0;
    font-size: 1.8rem;
}

.itinerary-item p {
    margin-bottom: 0.5rem;
}

    /* Responsive adjustments */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-unit);
    }

    header h1 {
        font-size: 2rem;
    }

    .controls {
        flex-direction: column;
        align-items: stretch;
    }

    .input-group {
        width: 100%;
        margin-bottom: var(--spacing-unit);
    }

    .input-group select,
    .input-group input[type="date"],
    #feedback-form .input-group input[type="email"],
    #feedback-form .input-group textarea {
        width: 100%;
        min-width: unset;
    }

    #generate-button,
    #feedback-form button[type="submit"] {
        width: 100%;
    }
}

/* Feedback Form Styles */
#feedback-form-section {
    background-color: white;
    padding: var(--spacing-unit) * 1.5;
    border-radius: var(--border-radius);
    box-shadow: 0 8px 16px var(--shadow-color);
    margin-top: var(--spacing-unit) * 2;
    margin-bottom: var(--spacing-unit) * 2;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

#feedback-form-section h2 {
    color: var(--primary-color);
    text-align: center;
    margin-top: 0;
    margin-bottom: var(--spacing-unit) * 1.5;
    font-size: 2rem;
}

#feedback-form .input-group {
    margin-bottom: var(--spacing-unit);
}

#feedback-form .input-group label {
    margin-bottom: 0.5rem;
}

#feedback-form .input-group input[type="email"],
#feedback-form .input-group textarea {
    padding: 0.6rem 1rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--primary-color);
    font-size: 1rem;
    background-color: var(--background-color);
    color: var(--text-color);
    width: 100%;
    box-sizing: border-box; /* Include padding in element's total width and height */
    resize: vertical; /* Allow vertical resizing for textarea */
}

#feedback-form button[type="submit"] {
    background-color: var(--primary-color);
    color: white;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: 0 4px 8px var(--shadow-color);
    display: block; /* Make button take full width */
    width: 100%;
    margin-top: var(--spacing-unit) * 1.5;
}

#feedback-form button[type="submit"]:hover {
    background-color: oklch(70% 0.2 260); /* Slightly lighter primary */
    transform: translateY(-2px);
}