@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');

:root {
    --primary-blue: #4B77D0;
    --accent-yellow: #FAC606;
    --dark-black: #191D21;
    --bg-color: #f4f7f6;
    --card-bg: #ffffff;
}

body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--dark-black);
}

.container {
    max-width: 900px;
    margin: 40px auto;
    padding: 30px;
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    position: relative;
}

h1, h2, h3, h4, h5 {
    color: var(--primary-blue);
    font-weight: 700;
}

h1 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2.5rem;
}

/* Language Switcher */
.lang-switcher {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 10;
}

.lang-switcher button {
    background-color: transparent;
    color: var(--dark-black);
    border: 1px solid var(--dark-black);
    padding: 5px 10px;
    margin-left: 5px;
    font-weight: 500;
}

.lang-switcher button:hover {
    background-color: var(--dark-black);
    color: var(--accent-yellow);
}

/* Buttons */
button {
    padding: 10px 18px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Roboto', sans-serif;
    font-weight: 500;
    transition: background-color 0.2s, transform 0.1s;
}

button:active {
    transform: translateY(1px);
}

/* Primary Action Buttons */
#start-new-calculation, 
#calculate,
.form-actions button,
.new-type-forms button,
.selector-container button,
.items-container button {
    background-color: var(--primary-blue);
    color: white;
}

#start-new-calculation:hover, 
#calculate:hover,
.form-actions button:hover,
.new-type-forms button:hover,
.selector-container button:hover,
.items-container button:hover {
    background-color: #3a61b0;
}

/* Secondary/Accent Buttons (Yellow) */
#add-parcel, #add-pallet {
    background-color: var(--accent-yellow);
    color: var(--dark-black);
}

#add-parcel:hover, #add-pallet:hover {
    background-color: #e0b105;
}

/* Delete/Remove Buttons */
.remove-parcel, .remove-pallet, #delete-address-btn, #delete-transsmart-package-type {
    background-color: #e74c3c; /* Keep red for danger actions, or use dark black? */
    background-color: var(--dark-black); /* Using dark black for secondary actions */
    color: white;
}

.remove-parcel:hover, .remove-pallet:hover, #delete-address-btn:hover, #delete-transsmart-package-type:hover {
    background-color: #333;
}

/* Pallet Buttons */
.pallet-type-btn {
    position: relative;
    width: 180px;
    margin-right: 10px;
    margin-bottom: 10px;
}

.pallet-type-btn[data-dimensions]::before,
.pallet-type-btn[data-dimensions]::after {
    position: absolute;
    left: 50%;
    z-index: 20;
    pointer-events: none;
    opacity: 0;
    transform: translate(-50%, 6px);
    transition: opacity 160ms ease, transform 160ms ease;
}

.pallet-type-btn[data-dimensions]::before {
    content: attr(data-dimensions);
    bottom: calc(100% + 10px);
    padding: 7px 10px;
    border-radius: 6px;
    background: var(--dark-black);
    color: white;
    font-size: 0.78rem;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
    box-shadow: 0 5px 14px rgba(0, 0, 0, 0.2);
}

.pallet-type-btn[data-dimensions]::after {
    content: "";
    bottom: calc(100% + 4px);
    border: 6px solid transparent;
    border-top-color: var(--dark-black);
    transform: translate(-50%, 6px);
}

.pallet-type-btn[data-dimensions]:hover::before,
.pallet-type-btn[data-dimensions]:hover::after,
.pallet-type-btn[data-dimensions]:focus-visible::before,
.pallet-type-btn[data-dimensions]:focus-visible::after {
    opacity: 1;
    transform: translate(-50%, 0);
}

.pallet-type-btn-accent {
    background-color: var(--accent-yellow) !important;
    color: var(--dark-black) !important;
}

.pallet-type-btn-accent:hover {
    background-color: #e0b105 !important;
}

/* Start New Calculation Button Positioning */
#start-new-calculation {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 10;
}

/* Selectors */
.selector-container {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
    gap: 20px;
    flex-wrap: wrap;
}

.parcel-selector, .pallet-selector {
    display: flex;
    align-items: center;
    flex: 1;
    background: #f9f9f9;
    padding: 15px;
    border-radius: 8px;
}

select {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    margin-right: 10px;
    font-family: 'Roboto', sans-serif;
    flex-grow: 1;
}

/* Items Container (Parcels/Pallets lists) */
.items-container {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
    gap: 30px;
    flex-wrap: wrap;
}

.parcels, .pallets {
    flex: 1;
    min-width: 300px;
}

.item {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
    align-items: center;
    margin-bottom: 15px;
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid var(--primary-blue);
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.item span {
    font-weight: 700;
    grid-column: 1 / -1;
    color: var(--dark-black);
    margin-bottom: 5px;
    font-size: 1.1em;
}

.item label {
    display: flex;
    flex-direction: column;
    font-size: 0.85em;
    color: #666;
    font-weight: 500;
}

.item input {
    margin-top: 5px;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    width: 100%;
    box-sizing: border-box;
}

.item button {
    justify-self: end;
    padding: 8px 12px;
    font-size: 0.9em;
}

/* Address Form - Improved Layout */
.address-form {
    background-color: #fff;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 40px;
    border: 1px solid #eee;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark-black);
}

.form-group input {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

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

.form-actions {
    display: flex;
    gap: 15px;
    justify-content: flex-start;
}

@media (max-width: 600px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
}

/* Collapsible / New Type Forms */
.new-type-forms {
    margin-bottom: 40px;
}

.form-row {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.collapsible-section {
    flex: 1;
    min-width: 300px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    overflow: hidden;
    border: 1px solid #eee;
}

.collapsible-header {
    background-color: var(--primary-blue);
    color: white;
    padding: 15px 20px;
    margin: 0;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.collapsible-header .toggle-icon {
    font-weight: bold;
    font-size: 1.2em;
}

.collapsible-content {
    padding: 20px;
}

.collapsible-content label {
    display: block;
    margin-top: 10px;
    margin-bottom: 5px;
    color: #555;
    font-weight: 500;
}

.collapsible-content input, .collapsible-content select {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    box-sizing: border-box;
}

/* Calculate Button & Results */
#calculate {
    width: 100%;
    padding: 18px;
    font-size: 1.2rem;
    background-color: var(--accent-yellow);
    color: var(--dark-black);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

#calculate:hover {
    background-color: #e0b105;
}

.calculator-notices {
    margin-bottom: 20px;
}

.calculator-notice {
    margin: 0 0 12px;
    padding: 14px 16px;
    border-radius: 8px;
    border-left: 4px solid transparent;
    line-height: 1.5;
    font-size: 0.98rem;
}

.calculator-notice-warning {
    background-color: #fff4d6;
    border-left-color: var(--accent-yellow);
    color: var(--dark-black);
}

.calculator-notice-info {
    background-color: #edf3ff;
    border-left-color: var(--primary-blue);
    color: var(--dark-black);
}

#result {
    margin-top: 20px;
    font-size: 1.1rem;
}

.rate-option {
    background-color: #fff;
    border-left: 5px solid var(--accent-yellow);
    padding: 20px;
    margin-bottom: 15px;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.rate-option strong {
    color: var(--dark-black);
    font-size: 1.2rem;
}

.flat-rate-panel {
    margin-bottom: 15px;
    padding: 14px;
    background: linear-gradient(180deg, #f8fbff 0%, #f3f6fb 100%);
    border: 1px solid #dbe4f0;
    border-radius: 10px;
}

.flat-rate-panel-missing {
    background: #fafbfc;
    border-color: #e3e8ef;
}

.flat-rate-panel-parcel-only {
    background: #e30613;
    border-color: #b8000b;
    box-shadow: 0 8px 22px rgba(227, 6, 19, 0.3);
}

.flat-rate-panel-parcel-only .flat-rate-title {
    color: #fff;
}

.flat-rate-panel-parcel-only .flat-rate-chip {
    background: #fff;
    border-color: #fff;
}

.flat-rate-panel-parcel-only .flat-rate-chip-label {
    color: #8f1119;
}

.flat-rate-panel-parcel-only .flat-rate-chip strong {
    color: #c6000c;
}

.flat-rate-title {
    margin-bottom: 12px;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #56657a;
}

.flat-rate-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.flat-rate-chip {
    padding: 12px 10px;
    background-color: rgba(255, 255, 255, 0.92);
    border: 1px solid #e1e7f0;
    border-radius: 8px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.flat-rate-chip-label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.76rem;
    color: #66768b;
}

.flat-rate-chip strong {
    font-size: 1rem;
    color: var(--dark-black);
}

.flat-rate-missing {
    color: #66768b;
    font-size: 0.92rem;
}

@media (max-width: 700px) {
    .flat-rate-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    backdrop-filter: blur(2px);
}

.modal-content {
    background-color: #fff;
    margin: 10% auto;
    padding: 30px;
    border-radius: 12px;
    width: 80%;
    max-width: 600px;
    box-shadow: 0 5px 30px rgba(0,0,0,0.3);
    position: relative;
}

.close-button {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close-button:hover {
    color: var(--dark-black);
    text-decoration: none;
    cursor: pointer;
}

#view-history, #view-exclusions {
    background-color: var(--dark-black);
    color: white;
    margin-top: 10px;
    margin-right: 10px;
}

/* History Items */
.history-item {
    background-color: #f8f9fa;
    border: 1px solid #eee;
    border-left: 4px solid var(--primary-blue);
    border-radius: 6px;
    padding: 15px;
    margin-bottom: 15px;
}

.restore-history-btn {
    background-color: var(--accent-yellow);
    color: var(--dark-black);
    font-size: 0.85em;
    padding: 5px 10px;
}

/* Loading Overlay */
.loading-overlay {
    display: none; /* Hidden by default */
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5); /* Semi-transparent black */
    z-index: 9999; /* High z-index to sit on top of everything */
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
}

.spinner {
    border: 8px solid rgba(255, 255, 255, 0.3); /* Light grey */
    border-top: 8px solid var(--accent-yellow); /* Yellow */
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
}

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

/* Exclusions Table */
.table-container {
    overflow-x: auto;
    max-height: 400px;
    overflow-y: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: var(--primary-blue);
    color: white;
}

tr:hover {
    background-color: #f1f1f1;
}

.flat-rate-reference { margin: 20px 0; }
.flat-rate-reference > button { width: 100%; text-align: left; }
.flat-rate-reference > button::after { content: " +"; float: right; }
.flat-rate-reference > button[aria-expanded="true"]::after { content: " −"; }
#flat-rate-reference-content { padding: 16px; background: #f3f7fb; border-radius: 8px; }
.flat-rate-table-scroll { overflow-x: auto; }
.published-flat-rates { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.published-flat-rates th, .published-flat-rates td { padding: 10px; border-bottom: 1px solid #d5dfeb; text-align: right; }
.published-flat-rates thead th { background: #e0ebf6; color: #173e63; }
.published-flat-rates th:first-child { text-align: left; }
.published-flat-rates td { white-space: nowrap; }
.published-flat-rates tbody tr:nth-child(even) { background: #fff; }
.flat-rate-note { font-size: 0.85rem; line-height: 1.5; color: #46566a; }

.flat-rate-surcharges {
    margin-top: 10px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}
@media (max-width: 700px) {
    .flat-rate-surcharges { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}