body {
    margin: 0;
    padding: 1rem;
    font-family: 'Montserrat', Arial, sans-serif;
    background-color: #f4f4f4;
    color: #0e3144;
}

h1, h2, legend {
    font-family: 'Cinzel', serif;
    font-weight: 600;
    color: #0e3144;
}

h1 {
    font-size: 2.5rem;
    margin-top: 0;
    text-align: center;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 1rem;
}

legend {
    font-size: 1.1rem;
    font-weight: 600;
    text-align: center; /* center category labels */
}

button {
    font-family: 'Montserrat', sans-serif;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    padding: 8px 16px;
    border: 2px solid #0e3144;
}

button:hover {
    background-color: #f6dea8;
    color: #0e3144;
}

button:active {
    transform: scale(0.98);
}

.hidden {
    display: none;
}

#preferences {
    max-width: 700px;
    margin: 0 auto;
    background: #ffffff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border-left: 5px solid #aa3b0f;
}

fieldset {
    margin-bottom: 1.5rem;
    border: 2px solid #bfdcd0;
    padding: 1rem;
    border-radius: 8px;
    background: #ffffff;
}

#prefForm > button[type="submit"] {
    display: block;
    margin: 2rem auto 0;
    padding: 12px 30px;
    font-size: 1rem;
    background: #0e3144;
    color: #ffffff;
    border: 2px solid #0e3144;
}

#prefForm > button[type="submit"]:hover {
    background: #f6dea8;
    color: #0e3144;
}

#cards {
    max-width: 500px;
    margin: 2rem auto;
    text-align: center;
}

.card {
    background: #ffffff;
    /* subtle passport paper texture */
    background-image: repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(0,0,0,0.05) 10px, rgba(0,0,0,0.05) 20px);
    padding: 2rem;
    margin-bottom: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-left: 5px solid #aa3b0f;
    border-top: 2px solid #bfdcd0;
    opacity: 0;
    transform: translateY(20px);
    transition: transform 0.4s ease, opacity 0.4s ease;
}

.card.enter {
    opacity: 1;
    transform: translateY(0);
}

.card.exit-left {
    transform: translateX(-100%);
    opacity: 0;
}

.card.exit-right {
    transform: translateX(100%);
    opacity: 0;
}

.card h2 {
    margin-top: 0;
    font-size: 1.5rem;
    color: #aa3b0f;
}

.card p {
    margin: 0.5rem 0;
    font-size: 0.95rem;
    line-height: 1.5;
    color: #0e3144;
}

/* passport stamp row */
.stamp-row {
    display: flex;
    justify-content: center;
    margin-top: 1.25rem;
}
.stamp-row img {
    width: 72px;
    height: 72px;
    object-fit: contain;
    margin: 0 4px;
    /*border: 1px solid #0e3144;
    border-radius: 4px;*/
    transform: rotate(-5deg);
}
.stamp-row img:nth-child(even) {
    transform: rotate(3deg);
}

#cardProgress {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 1rem;
}

#controls {
    margin: 2rem 0;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

#controls button {
    flex: 1;
    padding: 12px 20px;
    font-size: 1rem;
    background: #0e3144;
    color: #ffffff;
}

#controls button:hover {
    background: #bfdcd0;
    color: #0e3144;
}

#flightCount {
    font-weight: 600;
    font-size: 1.1rem;
    color: #0e3144;
}

#flightList {
    list-style: none;
    padding: 0;
    margin-top: 1.5rem;
    text-align: center; /* center justify selection list */
}

#flightList li {
    background: #f6dea8;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin: 0.5rem 0;
    border-left: 4px solid #aa3b0f;
    text-align: center; /* make each item centered */
}

/* summary page styling */
#summary {
    text-align: center;
}

#summaryList {
    list-style: none;
    padding: 0;
    margin-top: 1rem;
    text-align: center;
}

#summaryList li {
    background: #f6dea8;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin: 0.5rem auto;
    max-width: 90%;
    text-align: center;

    font-size: 0.95rem;
    color: #0e3144;
}

.option-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center; /* center all buttons */
    text-align: center; /* fallback for older browsers */
}

.option-list button {
    padding: 8px 12px;
    background: #ffffff;
    color: #0e3144;
    border: 2px solid #0e3144;
    font-size: 0.9rem;
}

/* remove focus outline and avoid hover color sticking on focus */
.option-list button:focus {
    outline: none;
    background: #ffffff;
}

.option-list button.selected {
    background: #bfdcd0;
    color: #0e3144;
    border-color: #0e3144;
    font-weight: 700;
}

.option-list.nested {
    margin-left: 1.5rem;
}

#smokeyButtons button {
    flex: 1;
    max-width: 100px;
}

#advancedDetails summary {
    cursor: pointer;
    font-weight: 700;
    color: #0e3144;
    margin-bottom: 1rem;
    padding: 0.5rem;
    border-radius: 6px;
    text-align: center; /* center advanced filters heading */
    transition: background 0.3s ease;
}

#advancedDetails summary:hover {
    background: #f6dea8;
}

#advancedDetails[open] summary::after {
    content: " ";
}

#advancedDetails summary::after {
    content: " ";
}

#summary {
    max-width: 700px;
    margin: 2rem auto;
    background: #ffffff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border-left: 5px solid #aa3b0f;
    text-align: left;
}

#summaryList {
    list-style: none;
    padding: 0;
}

#summaryList li {
    background: #f6dea8;
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    border-left: 4px solid #aa3b0f;
}

#summaryList strong {
    font-size: 1.1rem;
    color: #aa3b0f;
}

#resetBtn {
    display: block;
    margin: 2rem auto 0;
    padding: 12px 30px;
    background: #0e3144;
    color: #ffffff;
    border: 2px solid #0e3144;
    font-weight: 700;
}

#resetBtn:hover {
    background: #f6dea8;
    color: #0e3144;
}

select[multiple] {
    width: 100%;
    min-height: 6rem;
    background: #ffffff;
    color: #0e3144;
    border: 2px solid #bfdcd0;
    border-radius: 6px;
    padding: 0.5rem;
    font-family: 'Montserrat', sans-serif;
}

select[multiple] option:checked {
    background: #bfdcd0;
    color: #0e3144;
}

input[type="number"] {
    background: #ffffff;
    color: #0e3144;
    border: 2px solid #bfdcd0;
    border-radius: 4px;
    padding: 0.6rem;
    font-family: inherit;
}

label {
    margin-right: 1rem;
    color: #0e3144;
    font-weight: 500;
}