/* ------------------------------------------------------------------
   Shared styles for JSON2SQL and Excel2SQL tools
   ------------------------------------------------------------------ */

:root {
    --brand: #6366f1;
    --brand-deep: #7c3aed;
    --brand-ink: #312e81;
    --brand-soft: #eef2ff;
    --brand-glow: rgba(99, 102, 241, 0.35);

    --copy-bg: #f43f5e;
    --copy-bg-hover: #e11d48;
    --copy-glow: rgba(244, 63, 94, 0.35);
    --clear-bg: #e2e8f0;
    --clear-ink: #334155;
    --clear-bg-hover: #cbd5e1;

    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --surface: #ffffff;
    --surface-muted: #f8fafc;

    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 16px;

    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 10px 30px -12px rgba(15, 23, 42, 0.18);
    --shadow-lg: 0 20px 50px -20px rgba(15, 23, 42, 0.28);
}

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

html {
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background: #e0e9ff;
    min-height: 100vh;
    padding: 28px;
    color: var(--text);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

::selection {
    background: #c7d2fe;
    color: #1e1b4b;
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 8px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--border);
}

/* ---------------------------------------------------------------- header */

.header {
    background: linear-gradient(135deg, var(--brand) 0%, var(--brand-deep) 100%);
    color: white;
    padding: 38px 30px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header h1,
.header p,
.header a {
    position: relative;
    z-index: 1;
}

.header h1 {
    font-size: 2.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.header p {
    opacity: 0.92;
    font-size: 1.05rem;
}

.header a.back-link {
    display: inline-block;
    margin-top: 16px;
    padding: 7px 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.28);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    transition: background 0.2s, transform 0.2s;
}

.header a.back-link:hover {
    background: rgba(255, 255, 255, 0.24);
    transform: translateY(-1px);
}

/* ---------------------------------------------------------------- tool header */

.tool-header {
    background: var(--surface);
    color: var(--text);
    padding: 32px 30px;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.tool-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 6px;
    color: var(--brand-ink);
}

.tool-header p {
    color: var(--text-muted);
    font-size: 1rem;
}

/* ---------------------------------------------------------------- panel titles */

.panel-title {
    margin-bottom: 20px;
    color: var(--text);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

/* ---------------------------------------------------------------- layout */

.content {
    padding: 36px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
}

.content > * {
    min-width: 0;
}

.left-panel,
.right-panel {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* ---------------------------------------------------------------- forms */

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 18px;
}

.form-group > label {
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
    letter-spacing: 0.01em;
}

.field-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}

.field-row > label {
    margin-bottom: 0;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-muted);
    letter-spacing: 0.01em;
    min-width: 150px;
}

.field-row > input[type="text"],
.field-row > select {
    flex: 1;
    min-width: 220px;
}

input[type="text"],
select,
textarea {
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    font-size: 0.9rem;
    color: var(--text);
    transition: border-color 0.18s, box-shadow 0.18s;
}

input[type="text"],
select {
    font-family: inherit;
}

textarea {
    font-family: 'Monaco', 'Menlo', 'Courier New', monospace;
    min-height: 400px;
    resize: vertical;
    width: 100%;
    box-sizing: border-box;
    line-height: 1.5;
}

select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="%2364748b" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"%3E%3Cpolyline points="6 9 12 15 18 9"/%3E%3C/svg%3E');
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 38px;
    cursor: pointer;
}

input[type="text"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--brand);
    box-shadow: 0 0 0 4px var(--brand-glow);
}

input[type="text"]:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: none;
}

input[type="text"]::placeholder,
textarea::placeholder {
    color: #94a3b8;
}

input[type="text"],
input[type="file"],
select {
    width: 300px;
    max-width: 100%;
}

input[type="file"] {
    font-size: 15px;
    padding: 8px;
    color: var(--text-muted);
}

.checkbox-label {
    display: flex;
    align-items: center;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin-right: 8px;
}

/* ---------------------------------------------------------------- buttons */

.controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 20px;
}

button {
    padding: 11px 20px;
    background: var(--surface);
    color: var(--brand);
    border: 1.5px solid var(--brand);
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
}

button:hover {
    background: var(--brand);
    color: white;
}

button:active {
    transform: scale(0.98);
}

button:focus-visible {
    outline: 3px solid var(--brand-glow);
    outline-offset: 2px;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-copy {
    background: var(--surface);
    color: var(--copy-bg);
    border: 1.5px solid var(--copy-bg);
}

.btn-copy:hover {
    background: var(--copy-bg);
    color: white;
}

.btn-clear {
    background: var(--surface);
    color: var(--text-muted);
    border: 1.5px solid var(--border);
}

.btn-clear:hover {
    background: #f1f5f9;
    color: var(--text);
    border-color: #94a3b8;
}

/* ---------------------------------------------------------------- status */

.status {
    padding: 13px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    border-left: 4px solid var(--border);
    background: var(--surface-muted);
    color: var(--text-muted);
    margin-top: 10px;
    font-weight: 500;
    font-size: 0.92rem;
    display: none;
    line-height: 1.5;
}

.status.success {
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
    border-left: 4px solid #10b981;
    display: block;
}

.status.error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
    border-left: 4px solid #ef4444;
    display: block;
}

.status small {
    display: block;
    margin-top: 8px;
    font-family: 'Monaco', 'Menlo', monospace;
    font-weight: normal;
}

mark {
    background: #fda4af;
    color: #4c0519;
    padding: 1px 5px;
    border-radius: 4px;
    font-weight: 700;
}

/* ---------------------------------------------------------------- boxes */

.info-box {
    background: var(--brand-soft);
    border-left: 4px solid var(--brand);
    padding: 14px 16px;
    margin-bottom: 22px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: #4a5568;
    line-height: 1.6;
    box-shadow: var(--shadow-sm);
}

.info-box code {
    background: rgba(99, 102, 241, 0.1);
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 0.83em;
}

.box {
    background: var(--surface);
    padding: 22px 24px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.warn-box {
    background: #fff7e6;
    border: 1px solid #ffd591;
    border-left: 4px solid #fa8c16;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: #7c4a03;
    line-height: 1.55;
    box-shadow: var(--shadow-sm);
}

.warn-box div {
    margin-top: 4px;
}

.sql-notice {
    color: #856404;
    background: #fff3cd;
    border: 1px solid #ffeeba;
    padding: 9px 14px;
    border-radius: 8px;
    margin-bottom: 10px;
    font-size: 13px;
    line-height: 1.4;
}

/* ---------------------------------------------------------------- tables */

#preview {
    overflow-x: auto;
}

table {
    border-collapse: collapse;
    width: 100%;
    background: var(--surface);
}

th, td {
    border: 1px solid var(--border);
    padding: 8px 12px;
    text-align: left;
    white-space: nowrap;
    font-size: 0.85rem;
}

thead th {
    background: #f1f5f9;
    color: #334155;
    font-weight: 650;
    font-size: 0.82rem;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    position: sticky;
    top: 0;
    z-index: 1;
}

tbody tr:nth-child(even) {
    background: var(--surface-muted);
}

tbody tr:hover {
    background: var(--brand-soft);
}

th.empty {
    background: #ffcccc;
    opacity: 0.6;
    text-decoration: line-through;
}

td.empty {
    background: #fff5f5;
    opacity: 0.5;
}

.preview-table {
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.hidden {
    display: none !important;
}

/* ------------------------------------------------------- spreadsheet */

.spreadsheet-preview {
    overflow-x: auto;
    margin-top: 14px;
}

.spreadsheet-preview .sheet-label {
    font-weight: 600;
    margin: 12px 0 6px;
    color: var(--text);
}

/* ------------------------------------------------------- file upload */

.file-input-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}

.file-input-row input[type="file"] {
    display: none;
}

.file-input-row .file-input-label {
    display: inline-block;
    padding: 9px 18px;
    background: var(--brand-soft);
    border: 2px dashed #b9c3ff;
    border-radius: 10px;
    color: var(--brand-ink);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s, transform 0.2s;
    margin-bottom: 0;
}

.file-input-row .file-input-label:hover {
    background: #e2e8ff;
    border-color: var(--brand);
    transform: translateY(-1px);
}

.file-input-row #jsonFileName,
.file-input-row #excelFileName {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ------------------------------------------------- column mapping tab */

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

.mapping-table {
    border-collapse: collapse;
    width: 100%;
    min-width: 420px;
    margin-top: 4px;
}

.mapping-table th {
    text-align: left;
    font-size: 0.78rem;
    font-weight: 650;
    color: #64748b;
    padding: 8px 10px;
    border-bottom: 2px solid var(--border);
    background: #f7f8fb;
    position: sticky;
    top: 0;
}

.mapping-table td {
    padding: 6px 10px;
    border-bottom: 1px solid #eef1f6;
}

.mapping-table td.mapping-orig {
    font-size: 0.85rem;
    color: var(--text);
    width: 45%;
}

.mapping-input {
    width: 100%;
    box-sizing: border-box;
    padding: 6px 8px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-family: monospace;
    font-size: 0.85rem;
    color: var(--text);
}

.mapping-input:focus {
    outline: none;
    border-color: var(--brand);
    box-shadow: 0 0 0 3px var(--brand-glow);
}

/* -------------------------------------------------------- SQL output */

.sql-output {
    min-width: 0;
    width: 100%;
    box-sizing: border-box;
}

.sql-output pre {
    background: #f7f9fc;
    border-radius: var(--radius);
    padding: 18px;
    max-height: 480px;
    overflow-x: auto;
    overflow-y: auto;
    border: 1px solid var(--border);
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    white-space: pre;
}

.sql-output pre::-webkit-scrollbar-thumb {
    background: #cbd5e1;
}

.sql-output pre::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

.sql-output code {
    font-family: 'Monaco', 'Menlo', 'Courier New', monospace;
    font-size: 12.5px;
    line-height: 1.55;
}

.sql-output pre code[class*="language-"],
.sql-output pre[class*="language-"] {
    white-space: pre;
    width: max-content;
    min-width: 100%;
    display: block;
    text-shadow: none;
    word-break: normal;
}

.sql-output pre[class*="language-"] {
    background: #f7f9fc;
    color: #1e293b;
}

.sql-output pre code[class*="language-"] {
    background: none;
    color: inherit;
}

.sql-output .token.comment,
.sql-output .token.prolog,
.sql-output .token.doctype,
.sql-output .token.cdata {
    color: #6b7280;
}

.sql-output .token.keyword,
.sql-output .token.tag,
.sql-output .token.important,
.sql-output .token.atrule,
.sql-output .token.rule {
    color: #7c3aed;
}

.sql-output .token.string,
.sql-output .token.char,
.sql-output .token.attr-value,
.sql-output .token.regex {
    color: #059669;
}

.sql-output .token.number,
.sql-output .token.boolean,
.sql-output .token.constant,
.sql-output .token.symbol {
    color: #d97706;
}

.sql-output .token.function,
.sql-output .token.class-name,
.sql-output .token.selector,
.sql-output .token.attr-name {
    color: #2563eb;
}

.sql-output .token.operator,
.sql-output .token.entity,
.sql-output .token.url {
    color: #64748b;
}

.sql-output .token.punctuation {
    color: #94a3b8;
}

.sql-output .token.property,
.sql-output .token.variable {
    color: #dc2626;
}

/* ------------------------------------------------------------- navbar */

.navbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 14px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.navbar .navbar-brand {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.01em;
    white-space: nowrap;
}

.navbar .navbar-text {
    color: var(--text-muted);
    font-size: 0.92rem;
}

/* ----------------------------------------------------------- landing */

.landing {
    padding: 0;
}

.landing-hero {
    text-align: center;
    padding: 56px 32px 40px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.landing-hero h1 {
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--brand-ink);
    margin-bottom: 12px;
}

.landing-hero p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.6;
}

.landing-content {
    padding: 40px 32px 48px;
}

.landing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    width: 100%;
}

.tool-card {
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    text-decoration: none;
    color: var(--text);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--brand);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--brand);
}

.tool-card:hover::before {
    opacity: 1;
}

.tool-card .tool-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    font-size: 1.6rem;
    border-radius: 14px;
    background: var(--brand-soft);
    margin-bottom: 18px;
    box-shadow: inset 0 0 0 1px rgba(99, 102, 241, 0.12);
}

.tool-card h2 {
    margin-bottom: 8px;
    color: var(--brand-ink);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.tool-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.55;
    flex: 1;
}

.tool-card .tool-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 18px;
    color: var(--brand);
    font-weight: 600;
    font-size: 0.9rem;
}

.tool-card .tool-link::after {
    content: "→";
    transition: transform 0.2s ease;
}

.tool-card:hover .tool-link::after {
    transform: translateX(4px);
}

/* --------------------------------------------------------------- terms */

.terms-body {
    max-width: 720px;
    margin: 0 auto;
    padding: 10px 20px 30px;
}

.terms-body h2 {
    margin-top: 28px;
    margin-bottom: 10px;
    color: var(--text);
    font-size: 1.15rem;
    text-align: center;
}

.terms-body p {
    margin-bottom: 12px;
    line-height: 1.65;
    text-indent: 4ch;
}

.terms-body ul {
    margin: 8px 0 12px 24px;
    list-style: disc;
}

.terms-body li {
    margin-bottom: 6px;
    line-height: 1.55;
}

/* ------------------------------------------------------------- footer */

.footer {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
    margin-top: 20px;
}

.footer a {
    color: var(--brand);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* --------------------------------------------------------- responsive */

@media (max-width: 1024px) {
    .content {
        grid-template-columns: 1fr;
    }

    .landing-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    textarea {
        min-height: 300px;
    }
}

@media (max-width: 720px) {
    body {
        padding: 12px;
    }

    .tool-header {
        padding: 28px 18px;
    }

    .content {
        padding: 24px 18px;
        gap: 20px;
    }

    .controls {
        grid-template-columns: 1fr;
    }

    .landing-hero {
        padding: 40px 20px 32px;
    }

    .landing-hero h1 {
        font-size: 1.8rem;
    }

    .landing-content {
        padding: 28px 18px;
    }

    .landing-grid {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        transition: none !important;
        animation: none !important;
    }

    button:hover,
    .tool-card:hover,
    .header a.back-link:hover,
    .file-input-row .file-input-label:hover {
        transform: none;
    }
}