:root {
    --primary-color: #00c6ff;
    --secondary-color: #0072ff;
    --text-color: #e0e0e0;
    --text-dark: #1f2937;
    --bg-color: #121828;
    --glass-bg: rgba(31, 41, 55, 0.5);
    --glass-border: rgba(255, 255, 255, 0.1);
    --highlight-bg: rgba(0, 198, 255, 0.15);
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --cheapest-bg: rgba(40, 167, 69, 0.2);
    --cheapest-color: #90ee90;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

.app-container {
    width: 100%;
    max-width: 1200px;
    margin: auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0;
}

header .tagline {
    font-size: 1rem;
    opacity: 0.8;
    margin-top: -5px;
}

footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--glass-border);
    opacity: 0.6;
    font-size: 0.9rem;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 15px;
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    padding: 25px;
    transition: all 0.3s ease;
    position: relative;
}

.view {
    display: none;
}

.view.active {
    display: block;
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.view-header h3 {
    font-size: 2rem;
    margin: 0;
    border: none;
    padding: 0;
}

.btn-icon {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.btn-icon.back-btn {
    background: rgba(0, 198, 255, 0.1);
    border-color: rgba(0, 198, 255, 0.4);
}

.btn-icon:hover {
    border-color: var(--primary-color);
    background: var(--highlight-bg);
}

.btn-icon svg {
    width: 20px;
    height: 20px;
}


#homeView .card-selection {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.selection-card {
    cursor: pointer;
    text-align: center;
}

.selection-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.selection-card .icon {
    font-size: 3rem;
    margin-bottom: 15px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.selection-card h2,
#newComparisonModal h4,
#addCardChoiceModal h4 {
    font-size: 1.5rem;
}

#newComparisonModal h4,
#addCardChoiceModal h4 {
    font-size: 1.2rem;
}


.breakdown-view-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    align-items: flex-start;
}

.results-container {
    margin-top: 0;
}

.form-container h3,
.results-header h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-color);
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.list-header h3 {
    margin: 0;
}

.sort-control select {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-color);
    padding: 5px 10px;
}


.radio-group {
    display: flex;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    overflow: hidden;
}

.radio-group-item {
    flex: 1;
}

.radio-group-item input[type="radio"] {
    display: none;
}

.radio-group-item label {
    display: block;
    text-align: center;
    padding: 10px;
    cursor: pointer;
    background-color: transparent;
    transition: background-color 0.3s;
    margin: 0;
    font-weight: normal;
}

.radio-group-item input[type="radio"]:checked+label {
    background-color: var(--primary-color);
    color: white;
    font-weight: bold;
}

.radio-group-item label:hover {
    background-color: var(--glass-bg);
}

.radio-group-item input[type="radio"]:checked+label:hover {
    background-color: var(--secondary-color);
}

.input-group {
    display: flex;
}

.input-group input {
    flex-grow: 1;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.input-group select {
    width: 80px;
    border-left: 0;
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.action-buttons {
    margin-top: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    flex-grow: 1;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.btn-secondary {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-color);
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-warning {
    background: var(--warning-color);
    color: var(--text-dark);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-small {
    padding: 5px 12px;
    font-size: 0.9rem;
    flex-grow: 0;
}

.quick-summary {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--glass-border);
}

.quick-summary h4 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.quick-summary p {
    font-size: 0.9rem;
    opacity: 0.7;
    margin-bottom: 15px;
}

#telecomTotalData {
    margin-top: -15px;
    margin-bottom: 15px;
    font-style: italic;
}

.data-sub-note {
    display: block;
    font-size: 0.8em;
    opacity: 0.7;
    margin-top: 4px;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
}

.metric-card {
    background: rgba(0, 0, 0, 0.2);
    padding: 15px;
    border-radius: 10px;
    text-align: center;
}

.metric-card .value {
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--primary-color);
}

.metric-card .label {
    font-size: 0.9rem;
    opacity: 0.8;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.table-wrapper {
    overflow-x: auto;
    max-height: 60vh;
}

.breakdown-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.breakdown-table th,
.breakdown-table td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--glass-border);
    color: var(--text-color);
}

.breakdown-table th {
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-color);
}

.breakdown-table .highlight,
.comparison-highlight {
    background-color: var(--highlight-bg) !important;
    font-weight: bold;
}

.table-section-header td {
    font-weight: bold;
    font-size: 1.1rem;
    background-color: rgba(0, 0, 0, 0.3);
    border-bottom: 2px solid var(--primary-color);
    text-align: center;
}

#savedCardsContainer,
#savedComparisonsContainer {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.saved-card-item {
    display: flex;
    flex-direction: column;
    transition: border-color 0.3s ease-in-out;
}

.collapsible-card.hidden {
    display: none;
}

.toggle-visibility-btn {
    background: none;
    border: 1px solid var(--glass-border);
    color: var(--text-color);
    padding: 8px 15px;
    border-radius: 8px;
    cursor: pointer;
    margin-top: 20px;
    transition: all 0.2s;
}

.toggle-visibility-btn:hover {
    background-color: var(--highlight-bg);
    border-color: var(--primary-color);
}

.saved-card-item.in-comparison-basket {
    border-color: var(--warning-color);
}


.saved-card-item .card-body {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.saved-card-item .card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 10px;
}

.saved-card-item .card-title-group {
    flex-grow: 1;
    min-width: 0;
}

.saved-card-item .card-title-group h4 {
    font-size: 1.2rem;
    margin: 0;
    word-break: break-word;
    display: inline;
    margin-right: 8px;
    vertical-align: middle;
}

.saved-card-item .card-timestamp {
    font-size: 0.8rem;
    opacity: 0.6;
    margin-bottom: 15px;
}

.saved-card-item .card-type {
    font-size: 0.8rem;
    padding: 3px 8px;
    border-radius: 5px;
    background: var(--primary-color);
    color: white;
    display: inline-block;
    flex-shrink: 0;
    vertical-align: middle;
}

.saved-card-item .card-actions {
    display: flex;
    gap: 10px;
    margin-top: auto;
    border-top: 1px solid var(--glass-border);
    padding-top: 15px;
}

.saved-card-item .card-actions .btn {
    flex-grow: 1;
}

.card-menu-button {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.2s;
    margin-top: -5px;
    margin-right: -10px;
}

.card-menu-button:hover {
    background-color: var(--glass-bg);
}

.card-menu-button svg {
    width: 20px;
    height: 20px;
    color: var(--text-color);
    pointer-events: none;
}

#exportMenu,
.card-menu-dropdown {
    position: absolute;
    background-color: var(--bg-color);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    z-index: 1000;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    overflow: hidden;
    padding: 5px 0;
    width: 180px;
}

#exportMenu button,
.card-menu-dropdown button {
    display: block;
    width: 100%;
    padding: 8px 15px;
    background: none;
    border: none;
    color: var(--text-color);
    text-align: left;
    cursor: pointer;
}

#exportMenu button:hover,
.card-menu-dropdown button:hover {
    background-color: var(--highlight-bg);
}

.card-menu-dropdown button.delete {
    color: var(--danger-color);
}

.card-menu-dropdown button.delete:hover {
    background-color: rgba(220, 53, 69, 0.2);
}


/* Comparison View */
.comparison-footer-actions {
    margin-top: 30px;
    display: flex;
    justify-content: flex-end;
    gap: 15px;
    border-top: 1px solid var(--glass-border);
    padding-top: 20px;
}

.comparison-grid-wrapper {
    overflow-x: auto;
    padding-bottom: 15px;
}

.comparison-grid {
    display: flex;
    gap: 20px;
}

.comparison-card {
    padding: 15px;
    background: var(--glass-bg);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    width: 320px;
    flex-shrink: 0;
    position: relative;
}

.comparison-card-edit-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.1);
    transition: background-color 0.2s;
}

.comparison-card-edit-btn:hover {
    background-color: var(--highlight-bg);
}

.comparison-card-edit-btn svg {
    width: 16px;
    height: 16px;
}

.comparison-card h4 {
    font-size: 1.3rem;
    margin-bottom: 5px;
    cursor: pointer;
    border-bottom: 2px dotted transparent;
    padding-right: 35px;
}

.comparison-card h4:focus {
    outline: none;
    border-bottom-color: var(--primary-color);
}

.comparison-card-subtitle {
    font-size: 0.85rem;
    opacity: 0.8;
    margin-bottom: 15px;
    min-height: 40px;
}

.comparison-card-subtitle .diff-previous {
    display: block;
    font-size: 0.9em;
}

.comparison-data-note {
    display: block;
    font-size: 0.9em;
    font-style: italic;
    opacity: 0.7;
    margin-top: 5px;
}


.comparison-card .cheapest {
    background-color: var(--cheapest-bg);
    color: var(--cheapest-color);
    font-weight: bold;
}

.comparison-card .diff {
    opacity: 0.7;
    font-size: 0.9em;
    color: var(--text-color);
}

.comparison-card .table-wrapper {
    flex-grow: 1;
}

.add-new-card {
    display: flex;
    justify-content: center;
    align-items: center;
    border: 2px dashed var(--glass-border);
    cursor: pointer;
    min-height: 300px;
    transition: all 0.3s ease;
}

.add-new-card:hover {
    border-color: var(--primary-color);
    background: var(--highlight-bg);
}

.add-new-card-content {
    text-align: center;
}

.add-new-card-content .icon {
    font-size: 2.5rem;
}

.diff-header {
    cursor: pointer;
}

.diff-header:hover {
    color: var(--primary-color);
}

/* Floating Tray & Modals */
#comparisonTray {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
    align-items: center;
    transform: translateY(200%);
    transition: transform 0.4s ease-in-out;
    z-index: 999;
}

#comparisonTray.visible {
    transform: translateY(0);
}

.no-export {
    display: block;
}

.export-watermark {
    display: none;
    font-size: 12px;
    opacity: 0.6;
    text-align: center;
    padding-top: 15px;
    margin-top: 15px;
    border-top: 1px solid var(--glass-border);
}

.modal {
    display: none;
    position: fixed;
    z-index: 1001;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--bg-color);
    margin: 10% auto;
    padding: 25px;
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    width: 90%;
    max-width: 600px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.close-btn {
    color: #aaa;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close-btn:hover {
    color: white;
}

#diffTargetList,
#selectSavedCardList {
    max-height: 40vh;
    overflow-y: auto;
    margin-bottom: 20px;
}

#diffTargetList .diff-target-item,
#selectSavedCardList .selectable-card-item {
    display: block;
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    border: 1px solid transparent;
}

#diffTargetList .diff-target-item:hover,
#selectSavedCardList .selectable-card-item:hover {
    background-color: var(--glass-bg);
    border-color: var(--glass-border);
}

/* Data Management Modal Styles */
.data-management-tabs {
    display: flex;
    border-bottom: 1px solid var(--glass-border);
    margin-bottom: 20px;
}

.data-management-tabs .tab {
    padding: 10px 20px;
    cursor: pointer;
    border-bottom: 3px solid transparent;
}

.data-management-tabs .tab.active {
    border-bottom-color: var(--primary-color);
    font-weight: bold;
}

.data-management-content {
    display: none;
}

.data-management-content.active {
    display: block;
}

.data-management-content textarea {
    width: 100%;
    min-height: 150px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-color);
    padding: 10px;
    font-family: monospace;
    resize: vertical;
    margin-top: 10px;
}

.data-management-content .checkbox-group {
    display: flex;
    gap: 20px;
    margin-bottom: 15px;
}

#toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 25px;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 1002;
}

#toast.show {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -10px);
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2.5rem;
    }

    .comparison-grid {
        grid-auto-columns: minmax(280px, 1fr);
    }
}