/*!
 * EasifyMe GST Calculator (India)
 * CSS Prefix: gst-
 */

/* ============================================================
   LAYOUT & TABS
   ============================================================ */
.gst-tool {
    font-family: inherit;
}

.gst-tabs {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    margin-bottom: var(--space-5);
    background: var(--color-bg-secondary);
    padding: 6px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.gst-tab-btn {
    flex: 1;
    min-width: 90px;
    padding: 8px 10px;
    border: none;
    background: transparent;
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 5px;
    justify-content: center;
}

.gst-tab-btn:hover {
    background: var(--color-surface);
    color: var(--color-text);
}

.gst-tab-btn.active {
    background: var(--color-accent);
    color: #fff;
    box-shadow: 0 2px 8px rgba(59,130,246,0.3);
}

.gst-tab-panel { display: none; }
.gst-tab-panel.active { display: block; }

/* ============================================================
   GST 2.0 BADGE
   ============================================================ */
.gst-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: rgba(34,197,94,0.1);
    border: 1px solid rgba(34,197,94,0.25);
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    color: #16a34a;
    margin-bottom: var(--space-4);
}

/* ============================================================
   INPUT FIELDS
   ============================================================ */
.gst-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: var(--space-3);
}

.gst-field label {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 6px;
}

.gst-field label i {
    color: var(--color-accent);
    font-size: 13px;
}

.gst-label-hint {
    font-weight: 400;
    color: var(--color-text-muted);
    font-size: 11px;
}

.gst-input-wrap {
    position: relative;
    flex: 1;
}

.gst-currency-sym {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-muted);
    pointer-events: none;
    z-index: 1;
}

.gst-input {
    width: 100%;
    padding: 12px 14px 12px 30px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-text);
    background: var(--color-surface);
    outline: none;
    transition: var(--transition-base);
    -moz-appearance: textfield;
}

.gst-input::-webkit-inner-spin-button,
.gst-input::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.gst-input.no-prefix {
    padding-left: 14px;
}

.gst-input.small {
    font-size: var(--text-sm);
    font-weight: 600;
    padding: 8px 10px 8px 26px;
}

.gst-input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}

.gst-select {
    width: 100%;
    padding: 8px 12px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
}

/* ============================================================
   RATE BUTTONS
   ============================================================ */
.gst-rate-group {
    margin-bottom: var(--space-3);
}

.gst-rate-group-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.gst-rate-btns {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.gst-rate-btn {
    padding: 8px 18px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-full);
    background: transparent;
    color: var(--color-text);
    font-size: var(--text-sm);
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-base);
}

.gst-rate-btn:hover {
    border-color: var(--color-accent);
    background: rgba(59,130,246,0.06);
}

.gst-rate-btn.active {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

.gst-rate-btn.legacy {
    text-decoration: line-through;
    opacity: 0.5;
    font-size: 12px;
}

.gst-rate-btn.legacy.active {
    opacity: 1;
    text-decoration: none;
    background: #94a3b8;
    border-color: #94a3b8;
}

.gst-custom-rate-wrap {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.gst-custom-rate-input {
    width: 60px;
    padding: 6px 8px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-text);
    background: var(--color-surface);
    text-align: center;
    -moz-appearance: textfield;
}

.gst-custom-rate-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
}

/* ============================================================
   TOGGLE BUTTONS
   ============================================================ */
.gst-toggle-row {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
}

.gst-toggle-group {
    display: flex;
    border-radius: var(--radius-full);
    overflow: hidden;
    border: 1.5px solid var(--color-border);
}

.gst-toggle-btn {
    padding: 8px 16px;
    border: none;
    background: transparent;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
}

.gst-toggle-btn.active {
    background: var(--color-accent);
    color: #fff;
}

/* ============================================================
   RESULT CARD
   ============================================================ */
.gst-result-card {
    padding: var(--space-4);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    margin-bottom: var(--space-4);
}

.gst-result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    font-size: var(--text-sm);
    color: var(--color-text);
}

.gst-result-row.sub {
    padding-left: 16px;
    font-size: 13px;
    color: var(--color-text-muted);
}

.gst-result-row.divider {
    border-top: 1px dashed var(--color-border);
    margin-top: 4px;
    padding-top: 8px;
}

.gst-result-row.total {
    border-top: 2px solid var(--color-text);
    margin-top: 4px;
    padding-top: 10px;
    font-weight: 800;
    font-size: var(--text-base);
}

.gst-result-row .gst-val {
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.gst-result-row.total .gst-val {
    color: var(--color-accent);
    font-size: var(--text-lg);
}

.gst-result-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: var(--space-3);
}

.gst-action-btn {
    padding: 6px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    background: transparent;
    color: var(--color-text-muted);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    gap: 5px;
}

.gst-action-btn:hover {
    background: var(--color-surface);
    color: var(--color-text);
    border-color: var(--color-accent);
}

/* ============================================================
   BATCH / INVOICE TABLE
   ============================================================ */
.gst-batch-table-wrap {
    overflow-x: auto;
    margin-bottom: var(--space-4);
}

.gst-batch-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
    min-width: 650px;
}

.gst-batch-table th {
    padding: 8px 10px;
    text-align: left;
    font-weight: 700;
    color: var(--color-text-muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--color-bg-secondary);
    border-bottom: 2px solid var(--color-border);
}

.gst-batch-table th:last-child {
    text-align: right;
}

.gst-batch-table td {
    padding: 6px 8px;
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}

.gst-batch-table td:last-child {
    text-align: right;
    font-weight: 700;
}

.gst-batch-table input {
    width: 100%;
    padding: 6px 8px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    color: var(--color-text);
    background: var(--color-surface);
    font-weight: 600;
}

.gst-batch-table input:focus {
    border-color: var(--color-accent);
    outline: none;
}

.gst-batch-table .gst-batch-desc {
    min-width: 180px;
}

.gst-batch-table .gst-batch-qty {
    width: 60px;
}

.gst-batch-table .gst-batch-rate-col {
    width: 100px;
}

.gst-batch-table .gst-batch-gst-col {
    width: 80px;
}

.gst-batch-del-btn {
    background: none;
    border: none;
    color: var(--color-error);
    cursor: pointer;
    font-size: 16px;
    padding: 4px;
    border-radius: 4px;
    transition: var(--transition-base);
}

.gst-batch-del-btn:hover {
    background: rgba(239,68,68,0.1);
}

.gst-add-item-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--color-accent);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    width: 100%;
    justify-content: center;
    margin-top: var(--space-2);
}

.gst-add-item-btn:hover {
    background: rgba(59,130,246,0.06);
    border-color: var(--color-accent);
}

.gst-invoice-summary {
    padding: var(--space-4);
    background: linear-gradient(135deg, rgba(59,130,246,0.04), rgba(168,85,247,0.04));
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    margin-top: var(--space-4);
}

/* ============================================================
   SEARCH / PRODUCT LOOKUP
   ============================================================ */
.gst-search-wrap {
    position: relative;
    margin-bottom: var(--space-4);
}

.gst-search-input {
    width: 100%;
    padding: 12px 14px 12px 40px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--color-text);
    background: var(--color-surface);
    outline: none;
    transition: var(--transition-base);
}

.gst-search-input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}

.gst-search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    font-size: 14px;
}

.gst-search-results {
    margin-bottom: var(--space-4);
}

.gst-search-result-item {
    padding: var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2);
    background: var(--color-surface);
    transition: var(--transition-base);
    cursor: pointer;
}

.gst-search-result-item:hover {
    border-color: var(--color-accent);
    background: rgba(59,130,246,0.03);
}

.gst-search-result-name {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.gst-search-result-meta {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--color-text-muted);
    flex-wrap: wrap;
}

.gst-search-result-rate {
    font-weight: 700;
    color: var(--color-accent);
}

.gst-search-result-note {
    font-size: 11px;
    color: #16a34a;
    font-weight: 600;
    margin-top: 3px;
}

.gst-popular-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-top: var(--space-3);
}

.gst-popular-tag {
    padding: 4px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    background: transparent;
    color: var(--color-text-muted);
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-base);
}

.gst-popular-tag:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* ============================================================
   OLD VS NEW COMPARISON
   ============================================================ */
.gst-compare-boxes {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.gst-compare-box {
    padding: var(--space-3);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.gst-compare-box.old {
    background: rgba(239,68,68,0.04);
    border-color: rgba(239,68,68,0.2);
}

.gst-compare-box.new {
    background: rgba(34,197,94,0.04);
    border-color: rgba(34,197,94,0.2);
}

.gst-compare-box-title {
    font-size: 12px;
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-2);
}

.gst-compare-savings {
    text-align: center;
    padding: var(--space-3);
    background: rgba(34,197,94,0.08);
    border: 1px solid rgba(34,197,94,0.2);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
}

.gst-compare-savings-amount {
    font-size: var(--text-2xl);
    font-weight: 800;
    color: #16a34a;
}

.gst-compare-savings-text {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.gst-compare-presets {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-2);
    margin-top: var(--space-4);
}

.gst-compare-preset-btn {
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--color-text);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-base);
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.gst-compare-preset-btn:hover {
    border-color: var(--color-accent);
    background: rgba(59,130,246,0.04);
}

.gst-compare-preset-saving {
    color: #16a34a;
    font-weight: 700;
}

/* ============================================================
   ITC / NET LIABILITY
   ============================================================ */
.gst-itc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.gst-itc-box {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
}

.gst-itc-box-title {
    font-size: var(--text-sm);
    font-weight: 700;
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    gap: 8px;
}

.gst-itc-box.output .gst-itc-box-title {
    color: var(--color-warning);
}

.gst-itc-box.input .gst-itc-box-title {
    color: var(--color-success);
}

.gst-itc-result {
    padding: var(--space-4);
    background: linear-gradient(135deg, rgba(59,130,246,0.04), rgba(168,85,247,0.04));
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.gst-itc-net-label {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    text-align: center;
}

.gst-itc-net-amount {
    font-size: clamp(24px, 4vw, 36px);
    font-weight: 800;
    color: var(--color-accent);
    text-align: center;
    margin: var(--space-2) 0;
}

/* ============================================================
   CONSUMER VIEW
   ============================================================ */
.gst-consumer-grid {
    display: grid;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.gst-consumer-row {
    display: grid;
    grid-template-columns: 2fr 100px 50px 90px;
    gap: var(--space-2);
    align-items: center;
    padding: 6px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: var(--text-sm);
}

.gst-consumer-row.header {
    font-weight: 700;
    color: var(--color-text-muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--color-border);
    padding-bottom: 8px;
}

.gst-consumer-category {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text);
    font-weight: 500;
}

.gst-consumer-amount-input {
    padding: 6px 8px 6px 22px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text);
    background: var(--color-surface);
    width: 100%;
    -moz-appearance: textfield;
}

.gst-consumer-amount-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
}

.gst-consumer-rate {
    text-align: center;
    font-weight: 700;
    color: var(--color-accent);
}

.gst-consumer-tax {
    text-align: right;
    font-weight: 700;
    color: var(--color-warning);
}

.gst-consumer-total {
    padding: var(--space-4);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    text-align: center;
    margin-bottom: var(--space-4);
}

.gst-consumer-total-amount {
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--color-warning);
}

.gst-consumer-total-pct {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-top: 4px;
}

.gst-consumer-savings {
    padding: var(--space-3);
    background: rgba(34,197,94,0.08);
    border: 1px solid rgba(34,197,94,0.2);
    border-radius: var(--radius-md);
    text-align: center;
    font-size: var(--text-sm);
    color: #16a34a;
    font-weight: 600;
}

.gst-consumer-chart-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
    margin-top: var(--space-4);
}

/* ============================================================
   RATE CARD
   ============================================================ */
.gst-rate-card {
    padding: var(--space-4);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    margin-bottom: var(--space-3);
}

.gst-rate-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    padding-bottom: var(--space-2);
}

.gst-rate-card-title {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-text);
}

.gst-rate-card-slab {
    font-size: var(--text-lg);
    font-weight: 800;
    color: var(--color-accent);
}

.gst-rate-card-body {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    line-height: 1.6;
    padding-top: var(--space-2);
    border-top: 1px solid var(--color-border);
}

/* ============================================================
   SECTION HELPERS
   ============================================================ */
.gst-section-title {
    font-size: var(--text-base);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    gap: 8px;
}

.gst-section-title i {
    color: var(--color-accent);
}

.gst-inputs-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
}

.gst-tip-box {
    display: flex;
    gap: 10px;
    padding: var(--space-3);
    background: rgba(59,130,246,0.06);
    border-radius: var(--radius-md);
    border: 1px solid rgba(59,130,246,0.15);
    font-size: var(--text-sm);
    color: var(--color-text);
    margin: var(--space-3) 0;
}

.gst-tip-box i {
    color: var(--color-accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.gst-disclaimer {
    font-size: 11px;
    color: var(--color-text-muted);
    padding: var(--space-3);
    background: rgba(234,179,8,0.05);
    border-radius: var(--radius-md);
    border: 1px solid rgba(234,179,8,0.15);
    margin-top: var(--space-4);
}

/* ============================================================
   COMPOSITION SCHEME
   ============================================================ */
.gst-comp-types {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: var(--space-3);
}

.gst-comp-type-btn {
    padding: 8px 16px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-full);
    background: transparent;
    color: var(--color-text);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
}

.gst-comp-type-btn.active {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

.gst-comp-compare {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
    margin-top: var(--space-4);
}

.gst-comp-box {
    padding: var(--space-3);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    text-align: center;
}

.gst-comp-box-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    margin-bottom: 6px;
}

.gst-comp-box-value {
    font-size: var(--text-xl);
    font-weight: 800;
    color: var(--color-text);
}

/* ============================================================
   CHART CONTAINERS
   ============================================================ */
.gst-chart-container {
    width: 100%;
    overflow: hidden;
}

.gst-chart-tooltip {
    position: fixed;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 8px 12px;
    font-size: 12px;
    color: var(--color-text);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 1000;
    pointer-events: none;
    display: none;
    max-width: 220px;
}

/* ============================================================
   TOAST
   ============================================================ */
.gst-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    padding: 10px 24px;
    background: var(--color-text);
    color: var(--color-bg);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 600;
    z-index: 9999;
    opacity: 0;
    transition: all 0.3s ease;
    pointer-events: none;
}

.gst-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    .gst-compare-boxes,
    .gst-itc-grid,
    .gst-inputs-row,
    .gst-comp-compare,
    .gst-consumer-chart-row {
        grid-template-columns: 1fr;
    }

    .gst-tabs {
        gap: 3px;
        padding: 4px;
    }

    .gst-tab-btn {
        min-width: 0;
        padding: 6px 6px;
        font-size: 11px;
    }

    .gst-tab-btn i {
        display: none;
    }

    .gst-consumer-row {
        grid-template-columns: 1.5fr 80px 40px 70px;
        font-size: 12px;
    }

    .gst-toggle-row {
        flex-direction: column;
        gap: var(--space-2);
    }

    .gst-compare-presets {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .gst-rate-btns {
        gap: 4px;
    }

    .gst-rate-btn {
        padding: 6px 12px;
        font-size: 12px;
    }
}