/* light theme style based on kylc.com */
:root {
    --bg-light: #f8fafc;
    --card-bg: #ffffff;
    --card-border: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent-blue: #0284c7;
    --accent-blue-hover: #0369a1;
    --accent-gold: #b45309;
    --accent-green: #15803d;
    --danger: #b91c1c;
    --table-header: #f1f5f9;
    --transition: all 0.25s ease;
    
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
    background-color: var(--bg-light);
    color: var(--text-primary);
    min-height: 100vh;
    padding-top: 1rem;
}

/* App Container */
.app-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.5rem;
}

/* Header Styling */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1.25rem;
    border-bottom: 2px solid var(--accent-blue);
}

.logo {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.logo h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent-blue);
}

.logo-sub {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Tabs Toggle Navigation */
.tabs {
    display: flex;
    gap: 0.35rem;
    background: #e2e8f0;
    padding: 0.25rem;
    border-radius: 8px;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn.active, .tab-btn:hover {
    background: #ffffff;
    color: var(--accent-blue);
}

.tab-btn.active {
    box-shadow: 0 2px 4px rgba(0,0,0,0.06);
}

/* Tab Content Visibility */
.tab-content {
    display: none;
}

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

/* Mode Selector Switcher (Offline vs Online) */
.mode-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.mode-btn {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

.mode-btn .icon {
    font-size: 2rem;
    background: #f1f5f9;
    padding: 0.5rem;
    border-radius: 10px;
    transition: var(--transition);
}

.mode-btn div strong {
    display: block;
    font-size: 1.05rem;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
}

.mode-btn div small {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.mode-btn:hover {
    border-color: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.mode-btn.active {
    border-color: var(--accent-blue);
    background: rgba(2, 132, 199, 0.04);
    box-shadow: inset 0 0 0 2px var(--accent-blue);
}

.mode-btn.active .icon {
    background: rgba(2, 132, 199, 0.15);
}

/* Glassmorphic Cards Styling */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    margin-bottom: 1.5rem;
}

/* Dashboard Calculator Layout */
.calculator-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

@media (max-width: 768px) {
    .calculator-grid {
        grid-template-columns: 1fr;
    }
}

.calculator-card h2, .settings-grid h2, .results-card h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--accent-blue);
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 0.5rem;
}

/* Form inputs */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1rem;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
}

input, select, textarea {
    background: #ffffff;
    border: 1px solid #cbd5e1;
    color: var(--text-primary);
    padding: 0.65rem 0.85rem;
    font-size: 0.95rem;
    border-radius: 8px;
    outline: none;
    transition: var(--transition);
}

input:focus, select:focus, textarea:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

/* Buttons Styling */
.btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    padding: 0.7rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

.btn-primary {
    background: var(--accent-blue);
    color: #ffffff;
}

.btn-primary:hover {
    background: var(--accent-blue-hover);
}

.btn-secondary {
    background: #ffffff;
    color: var(--text-primary);
    border: 1px solid #cbd5e1;
}

.btn-secondary:hover {
    background: #f1f5f9;
}

.quota-info {
    margin-top: 0.75rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Best Option Summary Card */
.summary-card {
    background: #f0f9ff;
    border-color: #bae6fd;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.summary-header {
    margin-bottom: 0.5rem;
}

.badge {
    background: var(--accent-blue);
    color: #ffffff;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    text-transform: uppercase;
}

.summary-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-blue-hover);
    margin-bottom: 1rem;
}

.summary-details {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.rate-large {
    display: flex;
    align-items: baseline;
    gap: 0.35rem;
}

#best-rate-value {
    font-size: 2.2rem;
    font-weight: 800;
    font-family: 'Outfit', sans-serif;
    color: var(--accent-blue);
}

.rate-unit {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
}

.total-large {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

#best-total-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-gold);
}

/* Ranked Results Table Styling */
.table-container {
    overflow-x: auto;
    margin-top: 0.5rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

th, td {
    padding: 0.75rem 1rem;
    border: 1px solid #e2e8f0;
}

th {
    background-color: var(--table-header);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.8rem;
}

tbody tr:nth-child(even) {
    background-color: #f8fafc;
}

tbody tr:hover {
    background-color: #f1f5f9;
}

.rank-number {
    font-weight: 700;
    text-align: center;
    color: var(--text-secondary);
    width: 50px;
}

tbody tr:nth-child(1) .rank-number {
    color: var(--accent-blue);
}

.method-name {
    font-weight: 600;
    color: var(--text-primary);
    display: block;
}

.method-details {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.15rem;
}

.category-badge {
    display: inline-block;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
}

.category-badge.card {
    background: #e0f2fe;
    color: #0369a1;
}

.category-badge.mobile {
    background: #fef3c7;
    color: #b45309;
}

.category-badge.transfer {
    background: #dcfce7;
    color: #15803d;
}

.rate-col {
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    color: var(--accent-blue-hover);
}

.cost-col {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    color: var(--accent-gold);
}

.promo-tag {
    color: var(--accent-green);
    font-size: 0.75rem;
    font-weight: 500;
}

/* Link Style for Sources */
.source-link {
    color: var(--accent-blue);
    text-decoration: underline;
    font-size: 0.8rem;
    cursor: pointer;
}

.source-link:hover {
    color: var(--accent-blue-hover);
}

.fallback-tag {
    background-color: #fee2e2;
    color: #991b1b;
    font-size: 0.7rem;
    padding: 0.15rem 0.35rem;
    border-radius: 4px;
    display: inline-block;
    margin-top: 0.25rem;
    font-weight: 500;
}

/* Settings Layout */
.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.full-width {
    grid-column: 1 / span 2;
}

@media (max-width: 768px) {
    .settings-grid, .settings-grid-layout, .input-row {
        grid-template-columns: 1fr !important;
    }
    .full-width {
        grid-column: 1;
    }
}

.hidden {
    display: none !important;
}

/* Action Buttons */
.btn-delete {
    background: #fee2e2;
    color: #b91c1c;
    border: 1px solid #fecaca;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
}

.btn-delete:hover {
    background: #b91c1c;
    color: #ffffff;
}

/* Notification Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: #1e2937;
    color: #ffffff;
    padding: 0.8rem 1.25rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    border-left: 4px solid var(--accent-blue);
    transform: translateY(150%);
    transition: transform 0.25s ease;
    z-index: 1000;
    font-size: 0.9rem;
}

.toast.show {
    transform: translateY(0);
}

.toast.error {
    border-left-color: var(--danger);
}

.toast.success {
    border-left-color: var(--accent-green);
}

/* Currency Selector UI */
.currency-selector-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: stretch;
}
.currency-quick-tabs {
    display: flex;
    gap: 8px;
}
.currency-tab {
    padding: 0.75rem 1.25rem;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}
.currency-tab:hover {
    background: var(--bg-light);
    color: var(--text-primary);
}
.currency-tab.active {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.2);
}
.currency-dropdown-wrapper {
    flex: 1;
    min-width: 180px;
}
.currency-dropdown-wrapper select {
    height: 100%;
}