:root {
    --primary-color: #17a2b8; /* Changed from #343a40 to a teal accent */

    --birthday-confetti-color-list: "#f9a825, #fdd835, #ffeb3b, #ffee58, #fff176";
    --anniversary-confetti-color-list: "#e91e63, #ec407a, #f06292, #f48fb1, #f8bbd0";
    --relationship-milestone-color-list: "#4caf50, #66bb6a, #81c784, #a5d6a7, #c8e6c9";
    --single-person-milestone-color-list: "#2196f3, #42a5f5, #64b5f6, #90caf9, #bbdefb";
}

body {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background: #121212; /* Changed from #f8f9fa */
    color: #e0e0e0; /* Changed from #212529 */
    font-weight: 400;
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 15px 15px 0;
    box-sizing: border-box;
    overflow-x: hidden;
    position: relative;
}

.container {
    background-color: #1e1e1e; /* Changed from #ffffff */
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5); /* Changed from 0 4px 12px rgba(0, 0, 0, 0.1) */
    padding: 30px;
    max-width: 480px;
    width: 100%;
    border: 1px solid #333; /* Changed from #dee2e6 */
    position: relative;
    z-index: 1;
    box-sizing: border-box;
    margin-top: 0;
    margin-bottom: 0;
}

.hidden {
    display: none !important;
}

.two-person-section {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    margin-bottom: 25px;
    gap: 1px;
    text-align: center;
}
.person-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    min-width: 0;
}
.person-name {
    font-size: 1.1em;
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 8px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 100%;
    min-height: calc(1.1em * 1.3);
    line-height: 1.3;
}
.profile-picture {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 2px solid #444; /* Changed from #e9ecef */
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    background-color: #333; /* Changed from #e9ecef */
    text-align: center;
    font-size: 0.8em;
    color: #999; /* Changed from #888 */
    flex-shrink: 0;
    margin-bottom: 8px;
}
.profile-picture img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.profile-picture .placeholder-text {
    padding: 10px;
}
.heart-emoji {
    font-size: 2em;
    color: var(--primary-color);
    line-height: 1;
    flex-shrink: 0;

    margin-top: calc(1.1em * 1.3 + 8px);
}
.distance-below-heart {
    font-size: 0.9em;
    color: #adb5bd; /* Changed from #495057 */
    margin-top: 10px;
    min-height: 1.2em;
    text-align: center;
    line-height: 1.3;
}
.person-display .dob {
    font-size: 0.95em;
    color: #adb5bd; /* Changed from #6c757d */
    margin-top: 0;
    margin-bottom: 5px;
    min-height: 1.2em;
}
.person-display .age {
    font-size: 1em;
    color: #e0e0e0; /* Changed from #212529 */
    margin-top: 0;
    margin-bottom: 0;
    min-height: 1.2em;
}
.person-display .age strong {
    font-weight: 600;
    color: #ffffff; /* Changed from #333 */
}

#single-profile-display {
    text-align: center;
    margin-bottom: 25px;
}
#single-profile-display .profile-picture {
    margin-left: auto;
    margin-right: auto;
    width: 120px;
    height: 120px;
    margin-bottom: 15px;
}
#single-profile-display #singlePersonNameDisplay {
    font-size: 2em;
    font-weight: 600;
    color: #ffffff; /* Changed from #212529 */
    margin-bottom: 15px;
}
#single-profile-display #singlePersonDobDisplay {
    font-size: 0.95em;
    color: #adb5bd; /* Changed from #6c757d */
    margin-top: 0;
    margin-bottom: 0;
}

.calculation-section {
    background-color: #2a2a2a; /* Changed from #f1f3f5 */
    border-radius: 10px;
    padding: 25px 5px;
    text-align: center;
    margin-top: 0;
}
.date-range {
    display: flex;
    justify-content: space-around;
    margin-bottom: 25px;
    font-size: 1em;
    color: #adb5bd; /* Changed from #6c757d */
}
.age-details h2 {
    font-size: 1.5em;
    line-height: 1.2;
    margin-bottom: 15px;
    color: #ffffff; /* Changed from #212529 */
    font-weight: 600;
}
.age-details > p:first-of-type {
    margin: 10px 0 20px 0;
    font-size: 1.1em;
    color: #e0e0e0; /* Changed from #212529 */
}
.age-details strong {
    color: var(--primary-color);
}
.age-stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    justify-content: center;
    gap: 5px 10px;
    margin-top: 15px;
    font-size: 1.1em;
    color: #adb5bd; /* Changed from #495057 */
}
.age-stats-grid span:nth-child(odd) {
    text-align: right;
    color: #e0e0e0; /* Changed from #212529 */
    padding-right: 5px;
}
.age-stats-grid span:nth-child(even) {
    text-align: left;
    font-weight: 700;
    color: var(--primary-color);
    padding-left: 5px;
    overflow-wrap: break-word;
    min-width: 0;
}

.note-section {
    margin-top: 20px;
    text-align: left;
    font-size: 0.9em;
    color: #adb5bd; /* Changed from #6c757d */
    background-color: #2a2a2a; /* Changed from #f1f3f5 */
    padding: 15px;
    border-radius: 10px;
    word-wrap: break-word;
}
.note-section a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}
.note-section a:hover {
    text-decoration: underline;
    color: #ffffff; /* Changed from #212529 */
}

.profile-selector-container {
    width: 100%;
    max-width: 480px;
    overflow-x: auto;
    padding: 10px 0;
    margin-top: 0;
    margin-bottom: 0;
    -webkit-overflow-scrolling: touch;
    -ms-overflow-style: none;
    scrollbar-width: none;
}
.profile-selector-container::-webkit-scrollbar {
    display: none;
    height: 0;
    width: 0;
}
.profile-selector-list {
    display: flex;
    flex-wrap: nowrap;
    padding-bottom: 5px;
}
.profile-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 10px;
    border: 1px solid #444; /* Changed from #ced4da */
    border-style: solid;
    border-radius: 20px;
    margin-right: 8px;
    background-color: #333; /* Changed from #ffffff */
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
    white-space: nowrap;
    font-size: 0.9em;
    color: #adb5bd; /* Changed from #495057 */
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4); /* Changed from 0 1px 3px rgba(0, 0, 0, 0.1) */
    flex-shrink: 0;
}

.profile-item:last-child {
    margin-right: 0;
}
.profile-item:hover {
    background-color: #444; /* Changed from #e9ecef */
    border-color: #666; /* Changed from #adb5bd */
}
.profile-item.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color); /* Changed from #212529 */
    color: #ffffff;
    font-weight: 500;
}
.profile-item.active:hover {
    background-color: #148a9c; /* Darker shade of new primary color */
}
.profile-item-img {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid #555; /* Changed from #e9ecef */
    border-style: solid;
}

.profile-item-emoji {
    font-size: 22px;
    line-height: 1;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1001;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.65); /* Made darker */
    justify-content: center;
    align-items: center;
    padding: 15px;
    box-sizing: border-box;
}
.modal-content {
    background-color: #1e1e1e; /* Changed from #ffffff */
    margin: auto;
    padding: 25px 30px;
    border: none;
    border-radius: 10px;
    width: 100%;
    max-width: 450px;
    color: #e0e0e0; /* Changed from #212529 */
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.7); /* Changed from 0 5px 15px rgba(0, 0, 0, 0.2) */
    position: relative;
    box-sizing: border-box;
    animation: modal-slide-in-from-bottom 0.25s ease-out;
}
.close-button {
    position: absolute;
    top: 10px;
    right: 15px;
    cursor: pointer;
    line-height: 1;
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.close-button svg {
    width: 24px;
    height: 24px;
    fill: #adb5bd; /* Changed from #6c757d */
    transition: fill 0.2s ease-in-out;
}

.close-button:hover svg,
.close-button:focus svg {
    fill: #ffffff; /* Changed from #212529 */
}
.info-button {
    position: absolute;
    top: 10px;
    left: 15px;
    cursor: pointer;
    line-height: 1;
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.info-button svg {
    width: 24px;
    height: 24px;
    fill: #adb5bd; /* Changed from #6c757d */
}
.modal h2 {
    margin-top: 0;
    margin-bottom: 20px;
    color: #ffffff; /* Changed from #212529 */
    text-align: center;
    font-weight: 600;
    line-height: 1.2;
}
.modal label {
    display: block;
    margin-bottom: 8px;
    font-weight: 700;
    color: #adb5bd; /* Changed from #495057 */
}
.modal input[type="date"] {
    width: 100%;
    padding: 10px 10px;
    margin-bottom: 15px;
    border: 1px solid #444; /* Changed from #ced4da */
    border-radius: 5px;
    background-color: #333; /* Changed from #ffffff */
    color: #e0e0e0; /* Changed from #495057 */
    font-size: 1em;
    box-sizing: border-box;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    color-scheme: dark; /* Added for date picker theme */
}
.modal input[type="date"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(23, 162, 184, 0.25); /* Adjusted for new primary color */
}
.modal input[type="date"]::-webkit-calendar-picker-indicator {
    opacity: 0.8; /* Changed from 0.6 */
    cursor: pointer;
    margin-left: -25px;
    padding: 5px;
    filter: invert(1); /* Changed from none */
}
.modal input[type="date"]::after {
    content: none;
}
.modal-result {
    margin-top: 20px;
    padding: 15px;
    background-color: #2a2a2a; /* Changed from #f1f3f5 */
    border-radius: 8px;
    min-height: 50px;
    color: #e0e0e0; /* Changed from #212529 */
    font-size: 1em;
    line-height: 1.6;
}
.modal-result strong {
    color: var(--primary-color);
    font-weight: 500;
}
.modal-result ul {
    padding-left: 20px;
    margin: 0;
}
.modal-result li {
    margin-bottom: 5px;
}

#animation-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
    z-index: 999;
}
.confetti {
    position: absolute;
    width: 10px;
    height: 10px;
    opacity: 0.7;
    animation: fall linear infinite;
    top: -20px;
}
@keyframes fall {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 0.7;
    }
    100% {
        transform: translateY(105vh) rotate(720deg);
        opacity: 0;
    }
}
.confetti-text {
    background-color: transparent !important;
    width: auto !important;
    height: auto !important;
    border-radius: 0 !important;
    font-size: 14px;
    font-weight: 700;
    color: #ffffff;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    line-height: 1;
    position: absolute;
    opacity: 0.9;
    animation: fall linear infinite;
    top: -20px;
}

.toast-message {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #333; /* Changed from #343a40 */
    color: #e0e0e0; /* Changed from #ffffff */
    padding: 12px 25px;
    border-radius: 25px;
    font-size: 0.95em;
    z-index: 1010;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.5); /* Changed from 0 3px 8px rgba(0, 0, 0, 0.2) */
    opacity: 0;
    transition: opacity 0.4s ease-in-out, bottom 0.4s ease-in-out;
    pointer-events: none;
}
.toast-message.show {
    opacity: 1;
    bottom: 50px;
}

.edge-handle {
    position: fixed;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    width: 15px;
    height: 100px;
    background-color: #2a2a2a; /* Changed from #ffffff */
    border: 1px solid #444; /* Changed from #dee2e6 */
    border-right: none;
    border-radius: 10px 0 0 10px;
    box-shadow: -1px 0 3px rgba(0, 0, 0, 0.3); /* Changed from -1px 0 3px rgba(0, 0, 0, 0.05) */
    cursor: pointer;
    z-index: 1071;
    transition: right 0.3s ease-in-out, background-color 0.3s, border-color 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.edge-panel.open + .edge-handle {
    right: 120px;
    background-color: #333; /* Changed from #f1f3f5 */
    border-color: #555; /* Changed from #ced4da */
}
.edge-handle::after {
    content: "";
    display: block;
    width: 3px;
    height: 40px;
    background-color: #666; /* Changed from #ced4da */
    border-radius: 2px;
    transition: background-color 0.3s ease-in-out;
}

.edge-panel.open + .edge-handle::after {
    background-color: #999; /* Changed from #adb5bd */
}
.edge-panel {
    position: fixed;
    top: 10%;
    width: 120px;
    right: -120px;
    height: 80%;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background-color: #2a2a2a; /* Changed from #ffffff */
    border-left: 1px solid #444; /* Changed from #dee2e6 */
    border-top: 1px solid #444; /* Changed from #dee2e6 */
    border-bottom: 1px solid #444; /* Changed from #dee2e6 */
    border-right: none;
    border-radius: 15px 0 0 15px;
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.4); /* Changed from -2px 0 10px rgba(0, 0, 0, 0.08) */
    padding: 10px 8px 15px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    transition: right 0.3s ease-in-out;
    z-index: 1020;
    overflow-y: auto;
}
.edge-panel.open {
    right: 0;
}
.panel-title {
    color: #ffffff; /* Changed from #212529 */
    font-size: 0.9em;
    font-weight: 600;
    margin-bottom: 0;
    text-align: center;
    width: 100%;
    padding: 0 5px;
    box-sizing: border-box;
    position: relative;
}
.panel-title::after {
    content: "";
    display: block;
    width: 80%;
    height: 1px;
    background-color: #444; /* Changed from #e9ecef */
    margin: 8px auto 15px auto;
}
.panel-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.2s ease;
    width: 100%;
    padding: 5px 0;
    border-radius: 8px;
    background-color: transparent;
}
@media (hover: hover) and (pointer: fine) {
    .panel-item:hover {
        background-color: #333; /* Changed from #f1f3f5 */
    }
}
.panel-item:active,
.panel-item:focus,
.panel-item:focus-visible {
    outline: none !important;
    background-color: transparent !important;
}
.panel-item .panel-item-svg {
    margin-bottom: 6px;
    color: var(--primary-color);
    width: 32px;
    height: 32px;
    display: block;
}
.panel-item span {
    font-size: 0.75em;
    color: #adb5bd; /* Changed from #495057 */
    word-break: break-word;
    margin-top: 2px;
    line-height: 1.2;
}
.edge-panel > .panel-item + .panel-item {
    margin-top: 18px;
}
.edge-panel > .panel-item + .panel-title {
    margin-top: 22px;
}

#specialDateCalculatorModal label {
    display: block;
    margin-top: 15px;
    margin-bottom: 5px;
    font-weight: 700;
    color: #adb5bd; /* Changed from #495057 */
}
#specialDateCalculatorModal label[for="specialStartDate"] {
    margin-top: 5px;
}
#specialDateCalculatorModal input[type="date"],
#specialDateCalculatorModal input[type="number"],
#specialDateCalculatorModal select {
    width: 100%;
    padding: 10px 10px;
    margin-bottom: 15px;
    border: 1px solid #444; /* Changed from #ced4da */
    border-radius: 5px;
    background-color: #333; /* Changed from #ffffff */
    color: #e0e0e0; /* Changed from #495057 */
    font-size: 1em;
    box-sizing: border-box;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    color-scheme: dark; /* Added for picker theme */
}
#specialDateCalculatorModal input[type="date"]:focus,
#specialDateCalculatorModal input[type="number"]:focus,
#specialDateCalculatorModal select:focus,
#specialDateCalculatorModal .custom-select-trigger:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(23, 162, 184, 0.25); /* Adjusted for new primary color */
}
#specialDateCalculatorModal #calculateSpecialDateBtn {
    background-color: var(--primary-color);
    color: #ffffff;
    padding: 12px 15px;
    font-size: 1em;
    font-weight: 500;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    width: 100%;
    margin-top: 20px;
    transition: background-color 0.2s ease;
}
#specialDateCalculatorModal #calculateSpecialDateBtn:hover {
    background-color: #148a9c; /* Darker shade of new primary color */
}
#specialDateCalculatorModal .modal-result {
    margin-top: 20px;
    padding: 15px;
    background-color: #2a2a2a; /* Changed from #f1f3f5 */
    border-radius: 8px;
    min-height: 50px;
    color: #e0e0e0; /* Changed from #212529 */
    font-size: 1em;
    line-height: 1.6;
    text-align: center;
}
#specialDateCalculatorModal .modal-result strong {
    color: var(--primary-color);
}
#specialDateCalculatorModal .custom-select-container {
    position: relative;
    margin-bottom: 15px;
}
#specialDateCalculatorModal .custom-select-trigger {
    width: 100%;
    padding: 10px 10px;
    border: 1px solid #444; /* Changed from #ced4da */
    border-radius: 5px;
    background-color: #333; /* Changed from #ffffff */
    color: #e0e0e0; /* Changed from #495057 */
    font-size: 1em;
    box-sizing: border-box;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}
#specialDateCalculatorModal #customUnitSelectedValue {
    flex-grow: 1;
}
#specialDateCalculatorModal .custom-select-arrow {
    font-size: 0.8em;
    margin-left: 10px;
    transition: transform 0.2s ease;
}
#specialDateCalculatorModal .custom-select-trigger.open .custom-select-arrow {
    transform: rotate(180deg);
}
#specialDateCalculatorModal #customUnitMenu {
    display: none;
    position: absolute;
    background-color: #333; /* Changed from #ffffff */
    border: 1px solid #444; /* Changed from #ced4da */
    border-radius: 0 0 5px 5px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5); /* Changed from 0 4px 8px rgba(0, 0, 0, 0.1) */
    width: 100%;
    left: 0;
    top: 100%;
    z-index: 10;
    max-height: 150px;
    overflow-y: auto;
    box-sizing: border-box;
}
#specialDateCalculatorModal #customUnitMenu.visible {
    display: block;
}
#specialDateCalculatorModal .custom-select-option {
    padding: 10px 10px;
    color: #e0e0e0; /* Changed from #212529 */
    cursor: pointer;
    user-select: none;
}
#specialDateCalculatorModal .custom-select-option:hover {
    background-color: #444; /* Changed from #e9ecef */
}
#specialDateCalculatorModal .custom-select-option.selected {
    background-color: var(--primary-color); /* Changed from #212529 */
    color: #ffffff;
    font-weight: 500;
}

#addProfileModal label,
#editSingleProfileModal label,
#editCoupleModal label {
    display: block;
    margin-top: 15px;
    margin-bottom: 5px;
    font-weight: 700;
    color: #adb5bd; /* Changed from #495057 */
}
#addProfileModal input[type="text"],
#addProfileModal input[type="url"],
#addProfileModal textarea,
#editSingleProfileModal input[type="text"],
#editSingleProfileModal input[type="url"],
#editSingleProfileModal textarea,
#editCoupleModal input[type="text"],
#editCoupleModal input[type="url"],
#editCoupleModal textarea {
    width: 100%;
    padding: 10px 10px;
    margin-bottom: 15px;
    border: 1px solid #444; /* Changed from #ced4da */
    border-radius: 5px;
    background-color: #333; /* Changed from #ffffff */
    color: #e0e0e0; /* Changed from #495057 */
    font-size: 1em;
    box-sizing: border-box;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}
#addProfileModal input[type="text"]:focus,
#addProfileModal input[type="url"]:focus,
#addProfileModal textarea:focus,
#editSingleProfileModal input[type="text"]:focus,
#editSingleProfileModal input[type="url"]:focus,
#editSingleProfileModal textarea:focus,
#editCoupleModal input[type="text"]:focus,
#editCoupleModal input[type="url"]:focus,
#editCoupleModal textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(23, 162, 184, 0.25); /* Adjusted for new primary color */
}
#addProfileModal textarea,
#editSingleProfileModal textarea,
#editCoupleModal textarea {
    resize: vertical;
    min-height: 60px;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.5;
}
.modal-actions {
    margin-top: 25px;
    display: flex;
    gap: 10px;
}
.modal-button {
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    font-size: 0.95em;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease, opacity 0.2s ease;
    flex: 1;
    text-align: center;
}
.modal-button.primary {
    background-color: var(--primary-color);
    color: #ffffff;
}
.modal-button.primary:hover {
    background-color: #148a9c; /* Darker shade of new primary color */
}
.modal-button.secondary {
    background-color: #444; /* Changed from #f1f3f5 */
    color: #e0e0e0; /* Changed from #212529 */
    border: 1px solid #666; /* Changed from #ced4da */
}
.modal-button.secondary:hover {
    background-color: #555; /* Changed from #e9ecef */
    border-color: #777; /* Changed from #adb5bd */
}
.modal-button.danger {
    background-color: #dc3545;
    color: white;
}
.modal-button.danger:hover {
    background-color: #c82333;
}

.firestore-modal-overlay {
    display: none;
    position: fixed;
    z-index: 1050;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.75); /* Made darker */
    justify-content: center;
    align-items: center;
    text-align: center;
}
.firestore-modal-content {
    background-color: #1e1e1e; /* Changed from #fefefe */
    margin: auto;
    padding: 25px 40px;
    border: 1px solid #555; /* Changed from #888 */
    border-radius: 8px;
    width: auto;
    min-width: 200px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5); /* Changed from 0 5px 15px rgba(0, 0, 0, 0.3) */
}
.firestore-modal-content p {
    margin: 0;
    font-size: 16px;
    color: #adb5bd; /* Changed from #555 */
}
.firestore-loader {
    border-width: 5px;
    border-style: solid;
    border-color: #444; /* Changed from #f3f3f3 */
    border-top-color: var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: firestore-spin 1s linear infinite;
    margin-bottom: 20px;
}
@keyframes firestore-spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85); /* Made darker */
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1005;
    padding: 15px;
    box-sizing: border-box;
}
.popup-overlay .popup-content {
    background-color: #1e1e1e; /* Changed from white */
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.5); /* Changed from 0 5px 20px rgba(0, 0, 0, 0.35) */
    width: 100%;
    max-width: 800px;
    height: 90%;
    max-height: 500px;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}
.popup-overlay .popup-close-button {
    position: absolute;
    top: 10px;
    right: 15px;
    cursor: pointer;
    line-height: 1;
    z-index: 10;
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.popup-overlay .popup-close-button svg {
    width: 24px;
    height: 24px;
    fill: #bbb; /* Changed from #777 */
    transition: fill 0.2s ease-in-out;
}

.popup-overlay .popup-close-button:hover svg {
    fill: #fff; /* Changed from #000 */
}
#popup-map-title {
    text-align: center;
    margin: 0 0 15px 0;
    font-size: 1.5em;
    color: #ffffff; /* Changed from #212529 */
    font-weight: 600;
}
#map {
    flex-grow: 1;
    width: 100%;
    height: 100%;
    background-color: #121212; /* Added background for map container */
}
.leaflet-control-recenter,
.leaflet-control-satellite {
    background-color: #2a2a2a; /* Changed from white */
    border: 1px solid #555; /* Changed from #ccc */
    width: 30px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    font-size: 16px;
    cursor: pointer;
    user-select: none;
    display: block;
    color: #e0e0e0; /* Added color for emoji */
}
.leaflet-control-recenter:hover,
.leaflet-control-satellite:hover {
    background-color: #3a3a3a; /* Changed from #f4f4f4 */
}
.circular-map-marker-icon {
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #e0e0e0; /* Changed from white */
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.8); /* Changed from 0 0 5px rgba(0, 0, 0, 0.5) */
}
.distance-map-tooltip {
    background-color: rgba(0, 0, 0, 0.75); /* Changed from rgba(255, 255, 255, 0.85) */
    border: 1px solid #888; /* Changed from #555 */
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 0.9em;
    color: #e0e0e0; /* Changed from #333 */
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.25);
}
.map-distance-polyline {
    stroke: var(--primary-color);
    stroke-width: 4px;
    stroke-opacity: 0.85;
    stroke-dasharray: 5, 10;
    fill: none;
    transition: stroke 0.2s ease, stroke-width 0.2s ease, stroke-opacity 0.2s ease;
}
.map-distance-polyline:hover {
    stroke: #2ce1fc; /* Lighter shade of primary color */
    stroke-width: 6px;
    stroke-opacity: 1;
}

.edit-couple-form-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-height: 65vh;
    overflow-y: auto;
    padding: 5px 10px 5px 5px;
    margin: 0 -10px 0 -5px;
}

.form-group-box {
    border: 1px solid #444; /* Changed from #dee2e6 */
    border-radius: 8px;
    padding: 15px;
    background-color: #2a2a2a; /* Changed from #f8f9fa */
}

.form-group-box h3 {
    font-size: 1.1em;
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--primary-color);
    padding-bottom: 10px;
    border-bottom: 1px solid #444; /* Changed from #e9ecef */
}

.form-group-box label:not(:first-of-type) {
    margin-top: 12px;
}

@keyframes modal-slide-in-from-bottom {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

#snackbar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1051;

    background-color: #333; /* Changed from var(--primary-color) */
    color: #ffffff;
    font-family: inherit;
    text-align: center;
    padding: 1rem;
    border-top-left-radius: 15px;
    border-top-right-radius: 15px;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.5); /* Changed from rgba(0, 0, 0, 0.15) */

    transform: translateY(100%);
    transition: transform 250ms ease-in-out;
}

#snackbar.show {
    transform: translateY(0);
}