body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: #121212;
    color: #E0E0E0;
    margin: 0;
    padding: 24px;
}

main {
    width: 1000px;
    margin: auto;
}

h1 {
    text-align: center;
    color: #C89B3C;
    font-weight: 500;
}

h2, h3 {
    color: #ffffff;
    padding-bottom: 10px;
}

.gem-input-section h2,
.gem-list-section h2 {
    color: #C89B3C;
    font-size: 1.2rem;
    font-weight: 600;
    margin: 0 0 16px 0;
    padding-bottom: 8px;
    text-align: center;
}

/* Main container with side-by-side layout */
.main-container {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

/* Left side - Core Management */
.core-management-container {
    width: 616px;
}

/* Tab styling */
.tab-container {
    background-color: #1E1E1E;
    border: 1px solid #333333;
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    margin-bottom: 20px;
}

.tab-buttons {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
    background-color: #121212;
    border-radius: 8px;
    padding: 4px;
}

.tab-button {
    flex: 1;
    padding: 12px 16px;
    border: none;
    background-color: transparent;
    color: #888888;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 1rem;
    font-weight: 500;
}

.tab-button:hover {
    background-color: #2a2a2a;
    color: #E0E0E0;
}

.tab-button.active {
    color: #ffffff;
    font-weight: 600;
}

.tab-button.active[data-tab="order-cores"] {
    background-color: #AE0D0B;
}

.tab-button.active[data-tab="chaos-cores"] {
    background-color: #2B7DB2;
}

.tab-content {
    min-height: 400px;
}

.tab-panel {
    display: none;
}

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

.core-column {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* Right side - Gem Management */
.gem-management-container {
    width: 360px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.core-slot {
    background-color: #1E1E1E;
    border: 2px solid #333333;
    border-radius: 12px;
    padding: 16px;
    position: relative;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.core-controls {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-bottom: 10px;
}

.core-info, .result-summary {
    font-size: 14px;
    margin: 10px 0;
    padding: 8px;
    background-color: #121212;
    border-radius: 8px;
    border: 1px solid #333333;
    min-height: 20px;
}

/* Custom Dropdown */
.custom-select-wrapper {
    position: relative;
    width: 120px;
    font-size: 14px;
}
.custom-select-trigger {
    display: flex;
    align-items: center;
    padding: 8px;
    background-color: #121212;
    border: 1px solid #333333;
    border-radius: 8px;
    cursor: pointer;
    gap: 8px;
    height: 15px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.custom-select-trigger:focus {
    outline: none;
    border-color: #C89B3C;
    box-shadow: 0 0 0 3px rgba(200, 155, 60, 0.2);
}
.custom-select-trigger img {
    width: 24px;
    height: 24px;
}
.custom-options {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: #121212;
    border: 1px solid #333333;
    border-top: none;
    border-radius: 0 0 8px 8px;
    z-index: 10;
    display: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}
.custom-option {
    display: flex;
    align-items: center;
    padding: 8px;
    cursor: pointer;
    gap: 8px;
}
.custom-option:hover {
    background-color: #2a2a2a;
}
.custom-option.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background-color: #333333;
}
.custom-option img {
    width: 24px;
    height: 24px;
}

.gem-sockets {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-top: 10px;
}

.gem-socket {
    border: 2px dashed #666666;
    border-radius: 8px;
    width: auto;
    height: 48px;
    padding: 6px;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    line-height: 1.2;
    text-align: center;
    background-color: #0a0a0a;
    box-sizing: border-box;
}

.gem-socket.gem-equipped {
    border: 2px solid #333333;
    background-color: #1a1a1a;
}

.gem-socket-content {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 6px;
    width: 100%;
}

.gem-socket-image {
    width: 20px;
    height: 20px;
    object-fit: contain;
}

.gem-socket-stats {
    font-size: 12px;
    line-height: 1.1;
    text-align: center;
}

.gem-socket-stats div {
    margin: 1px 0;
}


.core-slot.target-failed .gem-socket {
    border-color: #ff4d4d;
    background-color: #2a0f0f;
}


.gem-input-section, .gem-list-section {
    background-color: #1E1E1E;
    border: 1px solid #333333;
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.gem-input-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
}

.gem-input-row {
    display: flex;
    gap: 8px;
    align-items: center;
    justify-content: flex-start;
}

.gem-input-row.single {
    justify-content: flex-start;
}

.gem-input-row.single .custom-select-wrapper {
    width: 248px; /* 120px + 8px gap + 120px */
}

.gem-input-row.single button {
    width: 248px;
    height: 31px;
    padding: 8px;
    font-size: 14px;
    background-color: #1E1E1E;
    color: #E0E0E0;
    border: 1px solid #333333;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gem-input-form > .custom-select-wrapper {
    flex-shrink: 0;
}

.gem-input-form > button {
    flex-shrink: 0;
    padding: 8px;
    font-size: 14px;
    width: 120px;
    height: 31px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gem-lists {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

#order-gem-list-container h4,
#chaos-gem-list-container h4 {
    text-align: center;
    margin-bottom: 12px;
    font-weight: 600;
}

#order-gem-list-container h4 {
    color: #F44336; /* Bright Red */
}

#chaos-gem-list-container h4 {
    color: #2196F3; /* Bright Blue */
}

.gem-list {
    background-color: #121212;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #333333;
    min-height: 436px;
    max-height: 436px;
    overflow-y: auto;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-content: flex-start;
    position: relative;
}

/* 커스텀 스크롤바 */
.gem-list::-webkit-scrollbar {
    width: 20px;
}

.gem-list::-webkit-scrollbar-track {
    background: #0a0a0a;
    border-radius: 4px;
}

.gem-list::-webkit-scrollbar-thumb {
    background: #333333;
    border-radius: 4px;
    border: 1px solid #1E1E1E;
}

.gem-list::-webkit-scrollbar-thumb:hover {
    background: #C89B3C;
}

.gem-list::-webkit-scrollbar-thumb:active {
    background: #b58a35;
}

/* Firefox 스크롤바 */
.gem-list {
    scrollbar-width: auto;
    scrollbar-color: #333333 #0a0a0a;
}

.gem-list:empty::before {
    content: '등록된 젬이 없습니다';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #666666;
    font-size: 14px;
    font-style: italic;
}

.gem-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 13px;
    border: 1px solid #333333;
    background-color: #1E1E1E;
    color: #E0E0E0;
    position: relative;
    flex: 0 0 auto;
}

.gem-item-content {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
}

.gem-item-image {
    width: 24px;
    height: 24px;
    object-fit: contain;
    flex-shrink: 0;
}

.gem-item-stats {
    font-size: 12px;
    line-height: 1.2;
}

.gem-item-stats div {
    margin: 1px 0;
}


.gem-item.order::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background-color: #AE0D0B;
    border-radius: 8px 0 0 8px;
}

.gem-item.chaos::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background-color: #2B7DB2;
    border-radius: 8px 0 0 8px;
}

.gem-delete-btn {
    background: none;
    border: none;
    color: #888888;
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
    padding: 2px 4px;
    border-radius: 4px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    margin-left: 8px;
}

.gem-delete-btn:hover {
    background-color: #ff4d4d;
    color: #ffffff;
    transform: scale(1.1);
}

button.nav-button {
    background-color: #1E1E1E;
    color: #E0E0E0;
    border: 1px solid #333333;
    padding: 12px 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.2s, box-shadow 0.2s;
    font-size: 1rem;
}

button.nav-button:hover {
    background-color: #2a2a2a;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

#calculate-btn {
    width: 1000px;
    padding: 12px;
    border-radius: 8px;
    border: none;
    background-color: #C89B3C;
    color: #121212;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
    margin: 20px auto;
    display: block;
}

#calculate-btn:hover {
    background-color: #b58a35;
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background-color: #1E1E1E;
    padding: 24px;
    border-radius: 12px;
    border: 1px solid #333;
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
    width: 350px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.modal-content h2 {
    margin: 0;
    text-align: center;
    color: #C89B3C;
}

.modal-content input {
    padding: 10px;
    border-radius: 4px;
    border: 1px solid #555;
    background-color: #2a2a2a;
    color: #f2f2f7;
    font-size: 16px;
}

.password-container {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.password-hint {
    font-size: 12px;
    color: #888;
    margin: 0;
    padding-left: 2px;
}

.modal-buttons {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 10px;
}

.modal-buttons .nav-button {
    padding: 8px 16px;
}

#modal-confirm-btn {
    background-color: #C89B3C;
    color: #121212;
    font-weight: bold;
}

/* Alert Modal Styles */
#alert-modal .modal-content {
    gap: 20px;
}

#alert-modal-message {
    margin: 0;
    text-align: center;
    font-size: 16px;
    line-height: 1.5;
    white-space: pre-wrap;
}

#alert-modal .modal-buttons {
    justify-content: center;
}

/* Gem Edit Modal Specific Styles */
#gem-edit-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 10px 0;
}

.gem-edit-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.gem-edit-row label {
    width: 80px;
    text-align: right;
    font-weight: 500;
    color: #C89B3C;
    flex-shrink: 0;
}

.gem-edit-row input {
    flex-grow: 1;
    padding: 8px;
    border-radius: 4px;
    border: 1px solid #555;
    background-color: #2a2a2a;
    color: #f2f2f7;
    font-size: 16px;
}

.custom-option.selected {
    background-color: #C89B3C !important;
    color: #121212 !important;
    font-weight: 500;
}

/* Spinner Modal Styles */
#spinner-modal .spinner-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.spinner {
    border: 6px solid #f3f3f3;
    border-top: 6px solid #C89B3C;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
}

.spinner-text {
    font-size: 18px;
    color: #E0E0E0;
    font-weight: 500;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}