:root {
    --primary-color: #3F51B5; /* Indigo */
    --primary-dark: #303F9F;
    --accent-color: #FF4081; /* Pink */
    --accent-dark: #d81b60;
    --text-color: #333;
    --text-light: #555;
    --text-on-primary: #ffffff;
    --text-on-accent: #ffffff;
    --background-color: #f4f7fc; /* Lighter background */
    --card-background: #ffffff;
    --card-shadow: 0 3px 6px rgba(0, 0, 0, 0.08);
    --card-hover-shadow: 0 6px 12px rgba(0, 0, 0, 0.12);
    --border-color: #e0e0e0;
    --success-color: #4CAF50; /* Green */
    --danger-color: #f44336;  /* Red */
    --info-color: #2196F3;   /* Blue */
    --warning-color: #FFC107; /* Amber */
    --gray-light: #f1f1f1;
    --gray-medium: #ccc;
    --gray-dark: #757575;
    --font-family: 'Roboto', sans-serif;
    --border-radius: 8px;
    --transition-speed: 0.3s;
    --highlight-color: #ffeb3b; /* Yellow for highlight */
    --highlight-text: #333;
}

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

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

/* --- App Bar --- */
.app-bar {
    background-color: var(--primary-color);
    color: var(--text-on-primary);
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
}

.app-bar h1 {
    margin: 0;
    font-size: 1.6em;
    font-weight: 500;
}

/* Button Group in Header */
.button-group {
    display: flex;
    gap: 10px; /* Space between buttons */
}

/* --- Floating Action Button (FAB) --- */
/* Styles apply to both buttons in the header group now */
.fab {
    background-color: var(--accent-color);
    color: var(--text-on-accent);
    border: none;
    border-radius: 50%;
    width: 56px;
    height: 56px;
    font-size: 28px; /* Icon size */
    display: flex; /* Center icon */
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: transform var(--transition-speed) ease, background-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    outline: none;
}
/* Specific style for random button maybe? */
#random-destination-btn {
    background-color: var(--info-color); /* Example: Blue */
}
#random-destination-btn:hover {
    background-color: #1976D2; /* Darker blue */
}

.fab:hover {
    background-color: var(--accent-dark); /* Default hover */
    transform: scale(1.05);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.25);
}

.fab:active {
    transform: scale(0.95);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.fab:disabled { /* Style for disabled random button */
    background-color: var(--gray-medium);
    cursor: not-allowed;
    transform: scale(1);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.fab i.material-icons {
    line-height: 1; /* Ensure icon is centered */
}


/* --- Main Content Area --- */
main {
    padding: 24px;
    max-width: 1200px; /* Limit max width for larger screens */
    margin: 0 auto; /* Center content */
}

/* --- Destination List --- */
.destination-list {
    list-style: none;
    padding: 0;
    margin: 0 0 40px 0; /* Space below list */
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); /* Responsive grid */
    gap: 20px;
}

/* Placeholder for empty list */
.empty-list-placeholder {
    text-align: center;
    padding: 40px;
    color: var(--text-light);
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    grid-column: 1 / -1; /* Span full grid width */
    border: 1px dashed var(--border-color);
}

/* --- Destination Item Card --- */
.destination-item {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease, background-color var(--transition-speed) ease;
    position: relative;
    overflow: hidden;
    border-left: 5px solid transparent;
    display: flex;
    flex-direction: column;
    min-height: 150px;
}

/* Style the content wrapper */
.card-content {
    padding: 20px 20px 10px 20px;
    flex-grow: 1;
}


.destination-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-hover-shadow);
}

.destination-item.not-reached {
    border-left-color: var(--gray-medium);
}

.destination-item.reached {
    background: linear-gradient(135deg, #e8f5e9 0%, #ffffff 100%);
    border-left-color: var(--success-color);
    color: var(--text-color);
}

.destination-item.reached::after {
    content: 'check_circle';
    font-family: 'Material Icons';
    position: absolute;
    top: 15px;
    right: 15px;
    color: var(--success-color);
    font-size: 20px;
    opacity: 0.8;
    z-index: 1;
}

.destination-item h3 {
    margin: 0 0 8px 0;
    font-size: 1.3em;
    font-weight: 500;
    color: var(--primary-dark);
}
.destination-item.reached h3 {
     color: #2e7d32;
}

.destination-item p {
    margin: 0;
    font-size: 0.95em;
    color: var(--text-light);
    line-height: 1.5;
    overflow: hidden;
    text-overflow: ellipsis;
    word-break: break-word;
    /* Simple way to limit lines shown, adjust as needed */
    display: -webkit-box;
    -webkit-line-clamp: 3; /* Show 3 lines */
    -webkit-box-orient: vertical;
}

/* Card Actions (Edit/Delete) */
.card-actions {
    display: flex;
    gap: 8px;
    margin-top: auto; /* Pushes actions to the bottom */
    padding: 10px 20px 15px 20px;
    align-self: flex-end;
    z-index: 2;
}

.card-actions button {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-light);
    padding: 6px;
    border-radius: 50%;
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.card-actions button:hover {
    background-color: var(--gray-light);
    border-color: var(--gray-medium);
    color: var(--primary-color);
}

.card-actions button i.material-icons {
     font-size: 20px;
}

.destination-item.reached .delete-btn {
    display: none;
}

/* --- Random Selection Effects --- */

/* Highlighted destination */
.destination-item.highlight {
    background-color: var(--highlight-color); /* Yellow highlight */
    color: var(--highlight-text); /* Ensure text is readable */
    border-left-color: var(--warning-color); /* Amber border */
    box-shadow: 0 0 15px rgba(255, 193, 7, 0.6); /* Subtle glow */
    transition: background-color 0.3s ease, border-left-color 0.3s ease, box-shadow 0.3s ease;
}
.destination-item.highlight h3 {
    color: var(--primary-dark); /* Keep title color */
}
.destination-item.highlight p {
    color: var(--text-color); /* Darker text on yellow */
}


/* Initial scan effect for unreached destinations */
.destination-item.temp-marquee {
    animation: tempMarquee 0.5s ease-in-out infinite alternate; /* Loop scanning */
    /* Slightly change background during scan */
    background-color: var(--gray-light);
    opacity: 0.8;
    transition: background-color 0.1s, opacity 0.1s;
}

/* Final marquee effect for selected destination */
.destination-item.marquee {
    animation: finalMarquee 1.5s ease-in-out infinite; /* Slower, smoother final marquee */
}

@keyframes tempMarquee {
    from {
        transform: scale(0.98) translateX(-3px);
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
    }
    to {
        transform: scale(1.02) translateX(3px);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    }
}

@keyframes finalMarquee {
    0% { transform: translateX(0) scale(1.01); }
    50% { transform: translateX(5px) scale(1.03); }
    100% { transform: translateX(0) scale(1.01); }
}

/* --- Modal Styles --- */
.modal {
    display: none;
    position: fixed;
    z-index: 1001;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.6);
    animation: fadeIn var(--transition-speed) ease-out;
}

.modal-content {
    background-color: var(--card-background);
    margin: 8% auto;
    padding: 30px;
    border: none;
    width: 90%;
    max-width: 550px;
    border-radius: var(--border-radius);
    position: relative;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    animation: slideScaleIn var(--transition-speed) cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.close-btn {
    color: var(--gray-medium);
    background: none;
    border: none;
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 32px;
    font-weight: 300;
    line-height: 1;
    cursor: pointer;
    padding: 0;
    transition: color var(--transition-speed) ease;
}

.close-btn:hover,
.close-btn:focus {
    color: var(--danger-color);
    outline: none;
}

/* Modal Form Styles */
.modal h2 {
    margin: 0 0 25px 0;
    font-size: 1.8em;
    font-weight: 500;
    color: var(--primary-color);
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
}

.modal form label {
    display: block;
    margin: 18px 0 6px 0;
    font-weight: 500;
    font-size: 0.9em;
    color: var(--text-light);
}

.modal form input[type="text"],
.modal form input[type="date"],
.modal form textarea {
    width: 100%;
    padding: 12px 15px;
    margin-bottom: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1em;
    font-family: inherit;
    transition: border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.modal form input[type="text"]:focus,
.modal form input[type="date"]:focus,
.modal form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(63, 81, 181, 0.2);
}

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

/* Grid layout for achievement date/companions */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

/* General Modal Button Styles */
.modal-actions button,
.modal form button[type="submit"] {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: background-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease, transform var(--transition-speed) ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.modal-actions button:hover,
.modal form button[type="submit"]:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    transform: translateY(-1px);
}
.modal-actions button:active,
.modal form button[type="submit"]:active {
    transform: translateY(0px);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

/* Specific Button Colors */
.modal-actions button[type="submit"],
#edit-save-changes-btn,
#achievement-save-btn {
    background-color: var(--primary-color);
    color: var(--text-on-primary);
}
.modal-actions button[type="submit"]:hover,
#edit-save-changes-btn:hover,
#achievement-save-btn:hover {
    background-color: var(--primary-dark);
}

.btn-secondary {
    background-color: var(--gray-dark);
    color: var(--text-on-primary);
}
.btn-secondary:hover { background-color: #616161; }

.btn-danger {
    background-color: var(--danger-color);
    color: var(--text-on-primary);
}
.btn-danger:hover { background-color: #d32f2f; }

.btn-success {
    background-color: var(--success-color);
    color: var(--text-on-primary);
}
.btn-success:hover { background-color: #388E3C; }

.btn-info {
    background-color: var(--info-color);
    color: var(--text-on-primary);
}
.btn-info:hover { background-color: #1976D2; }


/* Delete Modal Specifics */
#delete-modal p {
    margin-bottom: 25px;
    text-align: center;
    color: var(--text-light);
}
.radio-option {
    margin-bottom: 15px;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: background-color var(--transition-speed) ease, border-color var(--transition-speed) ease;
    display: flex; /* Align items */
    align-items: center;
}
.radio-option:hover {
    background-color: var(--gray-light);
}
.radio-option input[type="radio"] {
    margin-right: 12px; /* More space */
    accent-color: var(--primary-color);
    flex-shrink: 0; /* Prevent radio shrinking */
    width: 1.2em; /* Ensure visible size */
    height: 1.2em;
}
.radio-option label {
    font-weight: 500;
    margin: 0;
    display: block; /* Ensure label takes full width */
}
.radio-option label small {
    display: block;
    font-weight: 400;
    color: var(--text-light);
    font-size: 0.85em;
    margin-top: 3px; /* Space between label and small text */
    /* Removed margin-left */
}
/* Confirm button color changes handled by JS adding/removing classes */


/* Achievement Modal Specifics */
#achievement-modal h3 {
    margin: 0 0 20px 0;
    color: var(--text-light);
    font-weight: 400;
    font-size: 1.1em;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
}
#achievement-dest-name-display {
    font-weight: 500;
    color: var(--primary-color);
}

/* --- Recommendation Modal Specifics --- */
#recommend-modal .modal-content {
    max-width: 600px;
}

#recommend-list-container {
    margin-top: 10px;
}

.recommendation-list {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 40vh;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.recommendation-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    border-bottom: 1px solid var(--gray-light);
    font-size: 1em;
}

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

.recommendation-list li span {
    color: var(--text-color);
    margin-right: 15px;
    flex-grow: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.recommendation-list li strong {
    color: var(--primary-color);
    font-weight: 600;
    white-space: nowrap;
    background-color: rgba(63, 81, 181, 0.1);
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 0.9em;
    flex-shrink: 0;
}

#recommend-list-container p {
    font-size: 1.1em;
    padding: 20px;
    text-align: center;
}
#recommend-loading,
#recommend-error,
#recommend-empty {
    display: none; /* JS controls display */
}
#recommend-error { color: var(--danger-color); }
#recommend-empty { color: var(--text-light); }


/* Adjust button order/spacing in edit modal */
#edit-modal .modal-actions {
    justify-content: space-between;
    flex-wrap: wrap;
}
#edit-recommend-btn {
     order: -1; /* Move it towards the left */
     margin-bottom: 5px;
}
#edit-modal .modal-actions button {
     margin-bottom: 5px;
}


/* --- Animations --- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideScaleIn {
    from { transform: translateY(-20px) scale(0.98); opacity: 0; }
    to { transform: translateY(0) scale(1); opacity: 1; }
}

/* Card Shrink Animation for Deletion */
.destination-item.shrinking {
    animation: shrinkOut 0.4s ease-out forwards;
}

@keyframes shrinkOut {
    from {
        transform: scaleY(1);
        opacity: 1;
        margin-bottom: 20px; /* Matches original gap */
        padding-top: 20px;
        padding-bottom: 15px;
        min-height: 150px; /* Matches original min-height */
        border-left-width: 5px;
    }
    to {
        transform: scaleY(0);
        opacity: 0;
        margin-top: 0;
        margin-bottom: 0;
        padding-top: 0;
        padding-bottom: 0;
        min-height: 0;
        border: none;
    }
}

/* --- Ranking System Styles --- */
.ranking-section {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    padding: 25px;
    margin-top: 40px;
    box-shadow: var(--card-shadow);
}

.ranking-section h2 {
    margin: 0 0 25px 0;
    color: var(--primary-color);
    text-align: center;
    font-weight: 500;
    font-size: 1.6em;
}

/* Tabs */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 25px;
}

.tab-link {
    padding: 12px 20px;
    cursor: pointer;
    border: none;
    background-color: transparent;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px; /* Overlap container border */
    font-size: 1.05em;
    font-weight: 500;
    color: var(--text-light);
    transition: color var(--transition-speed) ease, border-bottom-color var(--transition-speed) ease, background-color var(--transition-speed) ease;
    flex-grow: 1;
    text-align: center;
    white-space: nowrap;
}

.tab-link:hover {
    color: var(--primary-dark);
    background-color: rgba(63, 81, 181, 0.05); /* Light primary hover */
}

.tab-link.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

/* Tab Content */
.tab-content {
    display: none;
    animation: fadeIn 0.5s;
}

.tab-content.active {
    display: block;
}

.tab-content h3 {
    color: var(--text-light);
    font-size: 1.2em;
    margin-bottom: 20px;
    text-align: center;
    font-weight: 400;
}

/* Ranking Lists */
.ranking-list { /* Applied class to ol */
    list-style: none;
    padding-left: 0;
    counter-reset: ranking-counter;
}

.ranking-list li {
    background-color: transparent;
    padding: 12px 15px;
    margin-bottom: 10px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    counter-increment: ranking-counter;
    position: relative;
    padding-left: 60px; /* More space for rank number */
    font-size: 1em;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    transition: background-color var(--transition-speed) ease;
}
.ranking-list li:hover {
     background-color: var(--gray-light);
}

.ranking-list li::before {
    content: counter(ranking-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 45px; /* Width of the rank number area */
    height: 100%;
    background-color: var(--gray-light);
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700; /* Bold rank number */
    font-size: 1.1em;
    border-right: 1px solid var(--border-color);
    border-top-left-radius: 4px; /* Match parent radius */
    border-bottom-left-radius: 4px;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

/* Top 3 Styling */
.ranking-list li:nth-child(1) { border-color: #FFD700; } /* Gold */
.ranking-list li:nth-child(1)::before { background-color: #FFD700; color: #6f4f00; border-color: #e6c300;}
.ranking-list li:nth-child(2) { border-color: #C0C0C0; } /* Silver */
.ranking-list li:nth-child(2)::before { background-color: #C0C0C0; color: #555; border-color: #adadad; }
.ranking-list li:nth-child(3) { border-color: #CD7F32; } /* Bronze */
.ranking-list li:nth-child(3)::before { background-color: #CD7F32; color: #613a15; border-color: #b8722d; }

/* --- Responsiveness --- */
@media (max-width: 768px) {
    main {
        padding: 16px;
    }
    .app-bar {
        padding: 12px 16px;
    }
    .app-bar h1 {
        font-size: 1.4em;
    }
    .destination-list {
        gap: 15px;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); /* Adjust min size */
    }
     .destination-item {
        min-height: 130px;
    }
     .card-content {
        padding: 15px 15px 5px 15px;
    }
     .destination-item h3 {
        font-size: 1.2em;
    }
     .destination-item p {
        font-size: 0.9em;
         -webkit-line-clamp: 2; /* Show fewer lines on smaller cards */
    }
     .card-actions {
        padding: 5px 15px 10px 15px;
        gap: 5px;
    }
     .card-actions button {
        width: 32px;
        height: 32px;
    }
     .card-actions button i.material-icons {
        font-size: 18px;
    }

    .modal-content {
        margin: 10% auto;
        padding: 20px;
        max-width: 95%;
    }
     .modal h2 {
        font-size: 1.5em;
        margin-bottom: 20px;
    }
    .modal-actions {
        justify-content: center;
        gap: 10px;
    }
    #edit-modal .modal-actions {
         justify-content: space-around;
    }
    .ranking-section {
         padding: 20px;
         margin-top: 30px;
    }
    .tabs {
        margin-bottom: 20px;
    }
     .tab-link {
        font-size: 1em;
        padding: 10px 5px;
    }
     .ranking-list li {
        padding-left: 55px;
        font-size: 0.95em;
    }
     .ranking-list li::before {
        width: 40px;
        font-size: 1em;
    }
}

@media (max-width: 480px) {
     .app-bar h1 {
        font-size: 1.2em;
    }
    .button-group {
        gap: 8px;
    }
     .fab {
        width: 48px;
        height: 48px;
        font-size: 24px;
    }
    .modal-actions button, .modal form button[type="submit"] {
        font-size: 0.9em;
        padding: 8px 15px;
        flex-grow: 1; /* Allow buttons to grow */
        flex-basis: 40%; /* Try to fit two buttons per row */
        text-align: center;
    }
     #edit-modal .modal-actions button {
        flex-basis: 45%; /* Adjust edit modal specifically if needed */
    }
    .destination-list {
        grid-template-columns: 1fr; /* Single column on very small screens */
    }
    .ranking-list li {
        font-size: 0.9em;
    }
}