/**
 * VatIt Calculator — Front-end Styles
 * Based on the "Global Trade Precision" design system from Stitch.
 */

/* --- Import Montserrat --- */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800;900&display=swap');

/* --- Root variables (design tokens) --- */
:root {
    --vatit-surface: #f8f9fa;
    --vatit-white: #ffffff;
    --vatit-on-surface: #191c1d;
    --vatit-on-surface-variant: #46464f;
    --vatit-outline: #777680;
    --vatit-outline-variant: #c7c5d0;
    --vatit-deep-navy: #030432;
    --vatit-sky-accent: #77CDF2;
    --vatit-success-green: #61CE70;
    --vatit-error: #ba1a1a;
    --vatit-error-container: #ffdad6;
    --vatit-radius-lg: 1.5rem;
    --vatit-radius-xl: 2rem;
    --vatit-radius-full: 2.5rem;
    --vatit-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --vatit-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --vatit-transition: 0.2s ease-out;
}

.vatit-calculator-wrapper {
    max-width: 1280px;
    margin: 0 auto;
    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--vatit-on-surface);
    background: var(--vatit-surface);
    padding: 80px 24px;
}

/* --- Card Container --- */
.vatit-form {
    background: var(--vatit-white);
    border: 1px solid var(--vatit-outline-variant);
    border-radius: var(--vatit-radius-xl);
    box-shadow: var(--vatit-shadow-lg);
    padding: 48px;
    overflow: hidden;
}

/* --- Form Grid --- */
.vatit-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

/* --- Fieldset --- */
.vatit-fieldset {
    border: none;
    padding: 0;
    margin: 0;
}

.vatit-fieldset-legend {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
}

.vatit-fieldset-icon {
    color: var(--vatit-deep-navy);
    font-size: 24px;
}

.vatit-fieldset-title {
    font-size: 20px;
    font-weight: 600;
    line-height: 28px;
    color: var(--vatit-deep-navy);
    margin: 0;
}

.vatit-fieldset-body {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* --- Individual Field --- */
.vatit-field {
    position: relative;
}

.vatit-field label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    line-height: 20px;
    letter-spacing: 0.01em;
    color: var(--vatit-on-surface-variant);
    margin-bottom: 8px;
    transition: color var(--vatit-transition);
}

.vatit-field label .vatit-required {
    color: var(--vatit-error);
}

/* --- Inputs & Selects --- */
.vatit-field input[type="text"],
.vatit-field input[type="number"],
.vatit-field input[type="date"],
.vatit-field select {
    width: 100%;
    height: 48px;
    padding: 0 16px;
    border: 1px solid transparent;
    border-radius: var(--vatit-radius-full);
    font-family: 'Montserrat', sans-serif;
    font-size: 16px;
    font-weight: 400;
    line-height: 24px;
    color: var(--vatit-on-surface);
    background: var(--vatit-white);
    background-clip: padding-box;
    box-sizing: border-box;
}

/* Gradient border via background-image trick.
   The gradient shows through the transparent border. */
.vatit-field input[type="text"],
.vatit-field input[type="number"],
.vatit-field input[type="date"],
.vatit-field select {
    background-image:
        linear-gradient(var(--vatit-white), var(--vatit-white)),
        linear-gradient(90deg, var(--vatit-sky-accent) 0%, var(--vatit-deep-navy) 100%);
    background-origin: border-box;
    background-clip: padding-box, border-box;
}

.vatit-field select {
    appearance: none;
    background-image:
        linear-gradient(var(--vatit-white), var(--vatit-white)),
        linear-gradient(90deg, var(--vatit-sky-accent) 0%, var(--vatit-deep-navy) 100%);
    background-repeat: no-repeat;
    background-position: center, center;
    padding-right: 44px;
    /* Custom select arrow via inline SVG in background (layered) won't work with the gradient technique.
       Instead we use a pseudo-element approach below. */
}

/* Select arrow via :after pseudo-element — parent needs position:relative */
.vatit-field.select-wrapper {
    position: relative;
}
.vatit-field.select-wrapper::after {
    content: '';
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath fill='%23777680' d='M7.41 8.59L12 13.17l4.59-4.58L18 10l-6 6-6-6z'/%3E%3C/svg%3E");
    background-size: contain;
    pointer-events: none;
}

.vatit-field input[type="number"] {
    text-align: right;
    padding-right: 48px;
}

.vatit-field input:focus,
.vatit-field select:focus {
    outline: none;
    box-shadow: none;
}

/* --- File Input --- */
.vatit-field input[type="file"] {
    width: 100%;
    height: 48px;
    padding: 10px 12px;
    border: 1px solid transparent;
    border-radius: var(--vatit-radius-full);
    font-family: 'Montserrat', sans-serif;
    font-size: 14px;
    color: var(--vatit-on-surface-variant);
    background: var(--vatit-surface);
    background-image:
        linear-gradient(var(--vatit-surface), var(--vatit-surface)),
        linear-gradient(90deg, var(--vatit-sky-accent) 0%, var(--vatit-deep-navy) 100%);
    background-origin: border-box;
    background-clip: padding-box, border-box;
    box-sizing: border-box;
    cursor: pointer;
}

.vatit-field input[type="file"]:focus {
    outline: none;
    box-shadow: none;
}

.vatit-field input[type="file"]::file-selector-button {
    padding: 6px 16px;
    margin-right: 12px;
    border: 1px solid var(--vatit-outline-variant);
    border-radius: var(--vatit-radius-lg);
    background: var(--vatit-white);
    color: var(--vatit-on-surface);
    font-family: 'Montserrat', sans-serif;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--vatit-transition);
}

.vatit-field input[type="file"]::file-selector-button:hover {
    background: var(--vatit-surface);
}

/* --- Hints --- */
.vatit-hint {
    font-size: 12px;
    font-weight: 500;
    line-height: 16px;
    letter-spacing: 0.04em;
    color: var(--vatit-on-surface-variant);
    font-style: italic;
    margin-top: 8px;
    margin-bottom: 0;
}

/* --- 2-col sub-grid inside transaction --- */
.vatit-field-grid-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.vatit-field-grid-full {
    grid-column: 1 / -1;
}

/* --- Line Items --- */
.vatit-line-item {
    border: 1px solid var(--vatit-outline-variant);
    border-radius: var(--vatit-radius-xl);
    padding: 20px;
    margin-bottom: 16px;
    background: var(--vatit-surface);
}

.vatit-line-item .vatit-field {
    margin-bottom: 16px;
}

.vatit-remove-line-item {
    display: block;
    margin-top: 16px;
    background: var(--vatit-error);
    color: #ffffff;
    border: none;
    border-radius: var(--vatit-radius-full);
    padding: 8px 18px;
    font-size: 13px;
    font-weight: 600;
    font-family: 'Montserrat', sans-serif;
    cursor: pointer;
    transition: background var(--vatit-transition);
}

.vatit-remove-line-item:hover {
    background: #a01818;
}

/* --- Buttons --- */
#vatit-calculator-form .vatit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0 32px;
    margin: 0;
    border: none;
    outline: none;
    cursor: pointer;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    text-decoration: none;
    transition: all var(--vatit-transition);
    box-shadow: none;
    background-image: none;
}

#vatit-calculator-form .vatit-btn-primary {
    background-color: var(--vatit-deep-navy) !important;
    background: var(--vatit-deep-navy) !important;
    color: #ffffff !important;
    min-width: 320px;
    height: 56px;
    font-size: 24px;
    line-height: 32px;
    border: none !important;
    border-radius: var(--vatit-radius-full) !important;
    box-shadow: var(--vatit-shadow-md) !important;
}

#vatit-calculator-form .vatit-btn-primary:hover {
    background-color: var(--vatit-deep-navy) !important;
    background: var(--vatit-deep-navy) !important;
    color: #c7c5d0 !important;
    border: none !important;
    box-shadow: var(--vatit-shadow-lg) !important;
}

#vatit-calculator-form .vatit-btn-primary:active {
    transform: scale(0.97);
}

#vatit-calculator-form .vatit-btn-primary:disabled {
    background-color: var(--vatit-outline-variant) !important;
    background: var(--vatit-outline-variant) !important;
    color: var(--vatit-on-surface-variant) !important;
    border: none !important;
    box-shadow: none !important;
    cursor: not-allowed;
    transform: none;
}

#vatit-calculator-form .vatit-btn-secondary {
    background-color: var(--vatit-white);
    color: var(--vatit-on-surface);
    border: 1px solid var(--vatit-outline-variant);
    border-radius: var(--vatit-radius-xl);
    font-size: 14px;
    font-weight: 600;
    line-height: 20px;
    height: 40px;
    padding: 0 20px;
}

#vatit-calculator-form .vatit-btn-secondary:hover {
    background-color: var(--vatit-surface);
    border-color: var(--vatit-outline);
}

/* --- Form Actions / CTA --- */
.vatit-form-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    margin-top: 56px;
}

.vatit-form-actions-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.vatit-form-disclaimer {
    font-size: 12px;
    font-weight: 500;
    line-height: 16px;
    letter-spacing: 0.04em;
    color: #7a7a7a;
    font-style: italic;
    text-align: center;
    max-width: 480px;
}

/* Spinner for button */
.vatit-spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: vatit-spin 0.7s linear infinite;
}

@keyframes vatit-spin {
    to { transform: rotate(360deg); }
}

/* --- Results (Stitch-inspired) --- */
.vatit-results {
    margin-top: 48px;
    border-radius: var(--vatit-radius-xl);
    background: var(--vatit-white);
    border: 1px solid var(--vatit-outline-variant);
    box-shadow: var(--vatit-shadow-lg);
    overflow: hidden;
}

/* Results Header */
.vatit-results-header {
    padding: 32px 32px 0;
    margin-bottom: 24px;
}

.vatit-results-title {
    font-size: 32px;
    font-weight: 700;
    line-height: 40px;
    color: var(--vatit-deep-navy);
    margin: 0 0 4px;
}

.vatit-results-id {
    font-size: 13px;
    color: var(--vatit-on-surface-variant);
    font-family: monospace;
    margin: 0;
}

/* Hero Summary Bar */
.vatit-hero {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    padding: 32px;
    margin: 0 24px 24px;
    border-radius: var(--vatit-radius-xl);
    border-left: 4px solid;
    background: var(--vatit-surface);
    position: relative;
    overflow: hidden;
}

.vatit-hero.vatit-accent-green  { border-left-color: #61CE70; }
.vatit-hero.vatit-accent-amber  { border-left-color: #f0a030; }
.vatit-hero.vatit-accent-red    { border-left-color: var(--vatit-error); }

.vatit-hero-left {
    flex: 1;
    min-width: 200px;
}

.vatit-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: var(--vatit-radius-full);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 12px;
}

.vatit-accent-green-badge  { background: rgba(97,206,112,0.1); color: #3a8a45; border: 1px solid rgba(97,206,112,0.25); }
.vatit-accent-amber-badge  { background: rgba(240,160,48,0.1); color: #b07a20; border: 1px solid rgba(240,160,48,0.25); }
.vatit-accent-red-badge    { background: rgba(186,26,26,0.08); color: var(--vatit-error); border: 1px solid rgba(186,26,26,0.2); }

.vatit-hero-badge-icon {
    font-size: 18px;
}

.vatit-hero-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--vatit-on-surface-variant);
    margin: 0 0 4px;
}

.vatit-hero-amount {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.vatit-hero-number {
    font-size: 48px;
    font-weight: 700;
    line-height: 56px;
    letter-spacing: -0.02em;
    color: var(--vatit-deep-navy);
}

.vatit-hero-currency {
    font-size: 24px;
    font-weight: 600;
    color: var(--vatit-on-surface-variant);
}

.vatit-hero-right {
    display: flex;
    gap: 32px;
    padding-left: 32px;
    border-left: 1px solid var(--vatit-outline-variant);
}

.vatit-hero-stat {
    text-align: center;
}

.vatit-hero-stat-label {
    display: block;
    font-size: 11px;
    font-weight: 500;
    color: var(--vatit-on-surface-variant);
    margin-bottom: 4px;
}

.vatit-hero-stat-value {
    font-size: 20px;
    font-weight: 600;
    color: var(--vatit-on-surface);
}

.vatit-color-green  { color: #3a8a45 !important; }
.vatit-color-amber  { color: #b07a20 !important; }
.vatit-color-red    { color: var(--vatit-error) !important; }

/* --- Two-column grid --- */
.vatit-results-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
    padding: 0 24px 24px;
}

/* --- Cards --- */
.vatit-card {
    background: var(--vatit-white);
    border: 1px solid var(--vatit-outline-variant);
    border-radius: var(--vatit-radius-xl);
    padding: 24px;
}

.vatit-card-full {
    margin: 0 24px 24px;
}

.vatit-card-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--vatit-deep-navy);
    margin: 0 0 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.vatit-card-icon { font-size: 22px; }

/* --- Reasoning Box --- */
.vatit-reasoning-box {
    background: var(--vatit-surface);
    border-radius: var(--vatit-radius-lg);
    padding: 16px;
    margin-bottom: 20px;
}

.vatit-reasoning-text {
    font-size: 16px;
    line-height: 26px;
    color: var(--vatit-on-surface);
    margin: 0;
}

/* --- Rules Grid --- */
.vatit-rules-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.vatit-rule-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.vatit-rule-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--vatit-on-surface-variant);
}

.vatit-rule-value {
    font-size: 13px;
    font-weight: 500;
    color: var(--vatit-deep-navy);
    background: var(--vatit-surface);
    padding: 10px 12px;
    border-radius: var(--vatit-radius-lg);
    border: 1px solid rgba(199,197,208,0.3);
    font-family: monospace;
}

/* --- Contextual Data --- */
.vatit-context-item {
    padding: 14px 0;
    border-top: 1px solid var(--vatit-outline-variant);
}

.vatit-context-item:first-child {
    border-top: none;
    padding-top: 0;
}

.vatit-context-label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--vatit-on-surface-variant);
    margin-bottom: 6px;
}

.vatit-context-country {
    display: flex;
    align-items: center;
    gap: 10px;
}

.vatit-country-code {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--vatit-deep-navy);
    color: #fff;
    font-size: 14px;
    font-weight: 700;
}

.vatit-context-mono {
    font-family: monospace;
    font-size: 13px;
    background: var(--vatit-surface);
    padding: 4px 8px;
    border-radius: 4px;
    color: var(--vatit-on-surface);
}

.vatit-tier-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: var(--vatit-radius-full);
    background: var(--vatit-deep-navy);
    color: var(--vatit-sky-accent);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* --- Table --- */
.vatit-table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.vatit-table-header .vatit-card-title {
    margin-bottom: 0;
}

.vatit-table-currency {
    font-size: 12px;
    color: var(--vatit-on-surface-variant);
}

.vatit-table-wrap {
    overflow-x: auto;
}

.vatit-breakdown-table {
    width: 100%;
    border-collapse: collapse;
}

.vatit-breakdown-table th {
    text-align: left;
    padding: 12px 20px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--vatit-on-surface-variant);
    background: var(--vatit-surface);
}

.vatit-breakdown-table td {
    padding: 14px 20px;
    font-size: 14px;
    border-bottom: 1px solid rgba(199,197,208,0.3);
    color: var(--vatit-on-surface);
}

.vatit-breakdown-table tr:hover td {
    background: var(--vatit-surface);
}

.vatit-td-right {
    text-align: right;
}

.vatit-td-bold {
    font-size: 18px;
    font-weight: 700;
    color: var(--vatit-deep-navy);
}

.vatit-td-semibold {
    font-weight: 600;
}

.vatit-row-highlight td {
    background: rgba(97,206,112,0.05);
}

.vatit-row-section td {
    background: var(--vatit-surface);
    padding: 10px 20px;
}

.vatit-section-label {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--vatit-on-surface-variant);
}

.vatit-li-num {
    display: inline-block;
    background: var(--vatit-deep-navy);
    color: var(--vatit-sky-accent);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 700;
    margin-right: 6px;
}

.vatit-li-reason {
    display: block;
    font-size: 11px;
    color: var(--vatit-on-surface-variant);
    margin-top: 2px;
    font-family: monospace;
}

/* --- Error --- */
.vatit-results-error {
    padding: 24px 32px;
    border-radius: var(--vatit-radius-xl);
    background: var(--vatit-error-container);
    border-left: 4px solid var(--vatit-error);
}

.vatit-error-header {
    font-size: 18px;
    font-weight: 700;
    color: var(--vatit-error);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.vatit-error-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--vatit-error);
    color: #fff;
    font-size: 16px;
    font-weight: 700;
}

.vatit-results-error p {
    margin: 0;
    font-size: 14px;
    color: var(--vatit-on-surface);
}

/* --- Results CTA Strip --- */
.vatit-results-cta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 16px 24px;
    padding: 24px 32px;
    margin: 0;
    background: var(--vatit-deep-navy);
    text-align: center;
}

.vatit-results-cta-text {
    font-size: 14px;
    font-weight: 500;
    line-height: 22px;
    color: rgba(255, 255, 255, 0.85);
    margin: 0;
    flex: 1 1 auto;
    min-width: 200px;
}

.vatit-results-cta-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: var(--vatit-radius-full);
    background: #CAEBF9;
    color: #000000 !important;
    font-size: 14px;
    /* font-weight: 700; */
    text-decoration: none;
    white-space: nowrap;
    transition: background var(--vatit-transition), transform var(--vatit-transition);
}

.vatit-results-cta-link:hover {
    background: #b3dff5;
    transform: translateY(-1px);
    text-decoration: none;
    color: #000000;
}

.vatit-results-cta-link:focus {
    outline: 2px solid var(--vatit-sky-accent);
    outline-offset: 2px;
}

.vatit-results-cta-arrow {
    flex-shrink: 0;
    transition: transform var(--vatit-transition);
}

.vatit-results-cta-link:hover .vatit-results-cta-arrow {
    transform: translateX(3px);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .vatit-calculator-wrapper {
        padding: 40px 16px;
    }

    .vatit-form {
        padding: 32px 24px;
    }

    .vatit-form-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 600px) {
    .vatit-form {
        padding: 24px 16px;
    }

    .vatit-field-grid-2col {
        grid-template-columns: 1fr;
    }

    .vatit-btn-primary {
        min-width: 100%;
        width: 100%;
    }

    .vatit-results-cta {
        flex-direction: column;
        gap: 12px;
        padding: 20px 16px;
    }

    .vatit-results-cta-link {
        width: 100%;
        justify-content: center;
    }
}