:root {
            --bg-0: #0b1020;
            --bg-1: #0f162b;
            --bg-2: #121b34;
            --card: rgba(15, 22, 41, 0.78);
            --card-strong: rgba(18, 26, 48, 0.92);
            --border: rgba(255, 255, 255, 0.08);
            --text: #eef3ff;
            --muted: #9aa8c7;
            --accent: #5ee1ff;
            --accent-2: #7a5cff;
            --accent-3: #37f0b3;
            --danger: #ff6b6b;
            --shadow: 0 18px 40px rgba(5, 10, 22, 0.65);
        }

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

        body {
            font-family: "Avenir Next", "Futura", "Trebuchet MS", "Segoe UI", sans-serif;
            background: radial-gradient(circle at 20% 20%, rgba(94, 225, 255, 0.12), transparent 45%),
                radial-gradient(circle at 85% 15%, rgba(122, 92, 255, 0.18), transparent 40%),
                linear-gradient(145deg, var(--bg-0), var(--bg-1) 50%, var(--bg-2));
            min-height: 100vh;
            color: var(--text);
            display: flex;
            justify-content: center;
            align-items: stretch;
            padding: 40px 24px 60px;
            position: relative;
            overflow-x: hidden;
        }

        body::before {
            content: "";
            position: fixed;
            inset: 0;
            background-image: radial-gradient(rgba(94, 225, 255, 0.35) 1px, transparent 1px);
            background-size: 36px 36px;
            opacity: 0.18;
            pointer-events: none;
            -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.6) 35%, transparent 70%);
            mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.6) 35%, transparent 70%);
        }

        body::after {
            content: "";
            position: fixed;
            width: 520px;
            height: 520px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(122, 92, 255, 0.25), transparent 65%);
            top: -140px;
            right: -120px;
            filter: blur(10px);
            pointer-events: none;
        }

        .app {
            width: 100%;
            max-width: 1100px;
            position: relative;
            z-index: 1;
            animation: floatIn 0.7s ease-out;
        }

        @keyframes floatIn {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .app-header {
            display: flex;
            flex-direction: column;
            gap: 24px;
            margin-bottom: 28px;
        }

        .header-side {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            justify-content: space-between;
            width: 100%;
        }

        .app-nav {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px;
            border-radius: 999px;
            background: var(--card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }

        .nav-link {
            text-decoration: none;
            color: var(--muted);
            font-size: 11px;
            letter-spacing: 1.6px;
            text-transform: uppercase;
            padding: 8px 14px;
            border-radius: 999px;
            transition: color 0.3s ease, background 0.3s ease, border-color 0.3s ease;
            border: 1px solid transparent;
        }

        .nav-link:hover {
            color: var(--text);
        }

        .nav-link.active {
            color: var(--text);
            background: rgba(94, 225, 255, 0.12);
            border-color: rgba(94, 225, 255, 0.35);
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            letter-spacing: 3px;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 12px;
        }

        h1 {
            font-size: 34px;
            letter-spacing: 0.5px;
            margin-bottom: 10px;
        }

        .subtitle {
            color: var(--muted);
            max-width: 520px;
            line-height: 1.6;
        }

        .app-footer {
            margin-top: 36px;
            padding: 14px 18px;
            border-radius: 16px;
            border: 1px solid var(--border);
            background: var(--card);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            box-shadow: var(--shadow);
        }

        .footer-meta {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .footer-text {
            color: var(--muted);
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 1.4px;
        }

        .footer-signature {
            text-transform: none;
            letter-spacing: 0.6px;
            font-size: 11px;
        }

        .footer-text strong {
            color: var(--text);
            font-weight: 600;
        }

        .header-stats {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: flex-end;
            align-items: center;
        }

        .stat-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 8px 14px;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: var(--shadow);
        }

        .stat-label {
            display: inline-flex;
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 1.4px;
            color: var(--muted);
            margin-bottom: 0;
        }

        .stat-value {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
        }

        .app-grid {
            display: grid;
            grid-template-columns: minmax(320px, 1.05fr) minmax(280px, 0.95fr);
            grid-template-areas:
                "plan projection"
                "vat vat-results";
            grid-auto-rows: auto;
            column-gap: 24px;
            row-gap: 36px;
            align-items: stretch;
        }

        .plan-panel {
            grid-area: plan;
        }

        .projection-panel {
            grid-area: projection;
        }

        .vat-panel {
            grid-area: vat;
        }

        .vat-results-panel {
            grid-area: vat-results;
        }

        .panel {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: 22px;
            padding: 26px;
            box-shadow: var(--shadow);
            backdrop-filter: blur(12px);
        }

        .panel-title {
            display: flex;
            justify-content: space-between;
            align-items: baseline;
            gap: 12px;
            margin-bottom: 18px;
        }

        .panel-title h2 {
            font-size: 20px;
            letter-spacing: 0.5px;
        }

        .panel-subtitle {
            color: var(--muted);
            font-size: 13px;
            text-transform: uppercase;
            letter-spacing: 1.5px;
        }

        .form-stack {
            display: grid;
            gap: 16px;
        }

        .form-group {
            background: var(--card-strong);
            border: 1px solid rgba(94, 225, 255, 0.08);
            border-radius: 16px;
            padding: 16px;
        }

        label {
            display: block;
            color: var(--muted);
            font-weight: 600;
            margin-bottom: 10px;
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 1.5px;
        }

        .helper-text {
            margin-top: 10px;
            font-size: 12px;
            color: var(--muted);
            line-height: 1.5;
        }

        select,
        input {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid rgba(94, 225, 255, 0.18);
            border-radius: 12px;
            font-size: 16px;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
            background: rgba(7, 12, 26, 0.7);
            color: var(--text);
        }

        select:focus,
        input:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(94, 225, 255, 0.15);
        }

        input[type="date"] {
            color-scheme: dark;
        }

        .custom-price {
            display: none;
            margin-top: 14px;
            padding-top: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            animation: fadeIn 0.3s ease;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(-8px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .vat-actions {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 12px;
            margin-top: 18px;
        }

        .action-button {
            width: 100%;
            padding: 10px 12px;
            border-radius: 12px;
            border: 1px solid rgba(94, 225, 255, 0.35);
            background: rgba(94, 225, 255, 0.12);
            color: var(--text);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            cursor: pointer;
            transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .action-button.secondary {
            border-color: rgba(122, 92, 255, 0.5);
            background: rgba(122, 92, 255, 0.16);
        }

        .action-button.full-width {
            padding: 14px 12px;
            font-size: 14px;
            letter-spacing: 2px;
            margin-top: 22px;
        }

        .action-button:hover {
            transform: translateY(-1px);
            border-color: rgba(94, 225, 255, 0.7);
            box-shadow: 0 12px 24px rgba(94, 225, 255, 0.18);
        }

        .action-button.secondary:hover {
            border-color: rgba(122, 92, 255, 0.8);
            box-shadow: 0 12px 24px rgba(122, 92, 255, 0.2);
        }

        .error {
            color: var(--danger);
            font-size: 14px;
            margin-top: 12px;
            padding: 10px 12px;
            background: rgba(255, 107, 107, 0.12);
            border: 1px solid rgba(255, 107, 107, 0.3);
            border-radius: 12px;
            display: none;
        }

        .results-intro {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 18px;
        }

        .results {
            display: none;
            gap: 12px;
            animation: slideDown 0.5s ease;
        }

        #cnameResults {
            margin-top: 18px;
        }

        .results-hint {
            margin-top: 12px;
            font-size: 12px;
            color: var(--muted);
        }

        .tooltip {
            position: relative;
            display: inline-flex;
            align-items: center;
            margin-left: 6px;
        }

        .tooltip-trigger {
            width: 18px;
            height: 18px;
            border-radius: 50%;
            border: 1px solid rgba(94, 225, 255, 0.4);
            background: rgba(94, 225, 255, 0.12);
            color: var(--accent);
            font-size: 11px;
            font-weight: 700;
            line-height: 1;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
        }

        .tooltip-trigger:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(94, 225, 255, 0.2);
        }

        .tooltip-content {
            position: absolute;
            right: 0;
            bottom: calc(100% + 10px);
            min-width: 220px;
            max-width: 260px;
            padding: 10px 12px;
            border-radius: 10px;
            background: rgba(10, 16, 32, 0.95);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text);
            font-size: 12px;
            line-height: 1.5;
            opacity: 0;
            transform: translateY(6px);
            pointer-events: none;
            transition: opacity 0.2s ease, transform 0.2s ease;
            z-index: 5;
        }

        .tooltip:hover .tooltip-content,
        .tooltip:focus-within .tooltip-content {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }

        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .result-item {
            padding: 14px;
            background: rgba(10, 16, 32, 0.9);
            border-radius: 14px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .result-label {
            font-weight: 600;
            color: var(--muted);
            display: block;
            margin-bottom: 6px;
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 1.2px;
        }

        .result-value {
            color: var(--text);
            font-size: 18px;
        }

        .highlight {
            background: rgba(94, 225, 255, 0.12);
            border: 1px solid rgba(94, 225, 255, 0.5);
        }

        .highlight .result-label {
            color: #e0f7ff;
        }

        .highlight .result-value {
            color: #ffffff;
            font-size: 22px;
            font-weight: 700;
        }

        .vat-results {
            display: none;
            gap: 12px;
            margin-top: 16px;
            animation: slideDown 0.4s ease;
        }

        @media (max-width: 900px) {
            .app-grid {
                grid-template-columns: 1fr;
                grid-template-areas:
                    "plan"
                    "projection"
                    "vat"
                    "vat-results";
            }

            .header-side {
                flex-direction: column;
                align-items: flex-start;
            }

            .app-header {
                align-items: flex-start;
            }

            .app-footer {
                justify-content: flex-start;
            }

            .header-stats {
                justify-content: flex-start;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            .app {
                animation: none;
            }
        }

        .currency-grid {
            display: grid;
            grid-template-columns: minmax(320px, 1.05fr) minmax(280px, 0.95fr);
            gap: 24px;
            align-items: stretch;
        }

        .swap-row {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .swap-row > .form-group {
            flex: 1;
        }

        .swap-button {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            border: 1px solid rgba(122, 92, 255, 0.5);
            background: rgba(122, 92, 255, 0.16);
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .swap-button::before {
            content: "";
            width: 18px;
            height: 18px;
            background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%237a5cff' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'><path d='M7 7h11l-3-3'/><path d='M18 7l-3 3'/><path d='M17 17H6l3 3'/><path d='M6 17l3-3'/></svg>");
            background-repeat: no-repeat;
            background-position: center;
            background-size: 18px 18px;
        }

        .swap-button:hover {
            transform: translateY(-1px);
            border-color: rgba(122, 92, 255, 0.85);
            box-shadow: 0 12px 24px rgba(122, 92, 255, 0.2);
        }

        @media (max-width: 900px) {
            .currency-grid {
                grid-template-columns: 1fr;
            }
        }

        code {
            font-family: "SFMono-Regular", "Menlo", "Monaco", "Consolas", "Liberation Mono", monospace;
            font-size: 0.95em;
            color: var(--accent);
            background: rgba(94, 225, 255, 0.12);
            padding: 2px 6px;
            border-radius: 6px;
            border: 1px solid rgba(94, 225, 255, 0.2);
        }

        .domain-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(280px, 1fr));
            gap: 24px;
            align-items: stretch;
            margin-bottom: 24px;
        }

        .cname-panel {
            margin-bottom: 40px;
            border-color: rgba(94, 225, 255, 0.35);
            box-shadow: 0 24px 50px rgba(5, 10, 22, 0.75), inset 0 0 0 1px rgba(94, 225, 255, 0.12);
            background: linear-gradient(145deg, rgba(15, 22, 41, 0.92), rgba(10, 16, 32, 0.88));
        }

        .info-list {
            display: grid;
            gap: 12px;
        }

        .info-item {
            padding: 14px;
            background: rgba(10, 16, 32, 0.9);
            border-radius: 14px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .info-title {
            display: block;
            font-weight: 600;
            color: var(--muted);
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            margin-bottom: 6px;
        }

        .info-body {
            font-size: 14px;
            line-height: 1.6;
            color: var(--text);
        }

        .command-groups {
            display: grid;
            gap: 24px;
        }

        .command-group h3 {
            font-size: 16px;
            letter-spacing: 0.4px;
            margin-bottom: 6px;
        }

        .command-group p {
            color: var(--muted);
            font-size: 13px;
            line-height: 1.6;
            margin-bottom: 14px;
        }

        .command-table {
            display: grid;
            gap: 12px;
        }

        .command-row {
            display: grid;
            grid-template-columns: minmax(180px, 1.1fr) minmax(220px, 0.9fr);
            gap: 12px;
            align-items: start;
            padding: 12px 14px;
            background: rgba(10, 16, 32, 0.92);
            border-radius: 14px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .command-label {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--muted);
            margin-bottom: 6px;
        }

        .command-desc {
            font-size: 13px;
            line-height: 1.6;
            color: var(--text);
        }

        .command-output {
            margin-top: 10px;
            border-radius: 10px;
            padding: 8px 10px;
            background: rgba(7, 12, 26, 0.85);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .command-output-label {
            font-size: 10px;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--muted);
            margin-bottom: 6px;
        }

        .command-output-code {
            margin: 0;
            font-family: "Menlo", "SFMono-Regular", "Monaco", "Consolas", "Liberation Mono", "Courier New", monospace;
            font-size: 12px;
            line-height: 1.5;
            color: rgba(122, 92, 255, 0.7);
            white-space: pre-wrap;
        }

        .command-code-wrapper {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .command-code {
            display: inline-flex;
            align-items: center;
            justify-content: flex-start;
            background: rgba(94, 225, 255, 0.12);
            border: 1px solid rgba(94, 225, 255, 0.3);
            border-radius: 10px;
            padding: 8px 10px;
            color: var(--accent);
            font-size: 13px;
            line-height: 1.4;
            white-space: normal;
            overflow-wrap: anywhere;
            flex: 1;
        }

        .copy-button {
            background: transparent;
            border: 1px solid rgba(103, 232, 249, 0.3);
            border-radius: 6px;
            padding: 6px;
            cursor: pointer;
            color: rgba(255, 255, 255, 0.5);
            transition: all 0.2s ease;
            flex-shrink: 0;
        }

        .copy-button:hover {
            background: rgba(103, 232, 249, 0.1);
            color: #67e8f9;
            border-color: rgba(103, 232, 249, 0.5);
        }

        .copy-button.copied {
            color: #37f0b3;
            border-color: rgba(55, 240, 179, 0.5);
        }

        .copy-button svg {
            width: 16px;
            height: 16px;
            display: block;
        }

        .status-card {
            transition: background 0.3s ease, border-color 0.3s ease;
        }

        .status-card.status-pass {
            border-color: rgba(55, 240, 179, 0.6);
            background: rgba(55, 240, 179, 0.12);
        }

        .status-card.status-fail {
            border-color: rgba(255, 107, 107, 0.65);
            background: rgba(255, 107, 107, 0.16);
        }

        .status-card.status-pass .result-value {
            color: var(--accent-3);
            font-weight: 700;
        }

        .status-card.status-fail .result-value {
            color: var(--danger);
            font-weight: 700;
        }

        @media (max-width: 900px) {
            .domain-grid {
                grid-template-columns: 1fr;
            }

            .command-row {
                grid-template-columns: 1fr;
            }

            .command-code {
                width: 100%;
            }
        }