/* =========================================
   REGEX TESTER & CHEAT SHEET TOOL CSS
   ========================================= */

:root {
    --tool-accent-tint: #ecfdf5;
    --mono-font: 'JetBrains Mono', 'Courier New', monospace;
}
[data-theme="dark"] { --tool-accent-tint: #052e1f; }

.tool-hero {
    padding: 4rem 0 3rem;
    background: radial-gradient(circle at center, var(--bg-light) 0%, var(--bg-main) 100%);
    border-bottom: 1px solid var(--border-color);
}
.category-badge {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.35rem 1rem; border-radius: 50px; font-size: 0.85rem; font-weight: 700;
    color: #fff; margin-bottom: 1.5rem; text-transform: uppercase; letter-spacing: 0.5px;
}

.tool-interface-wrapper { padding: 2rem 0 4rem; background-color: var(--bg-main); }
.tool-container-wide { max-width: 1200px; margin: 0 auto; }

/* Regex / Text Cards */
.regex-card {
    background: var(--bg-main); border: 1px solid var(--border-color); border-radius: 16px;
    padding: 1.5rem; height: 100%; box-shadow: 0 4px 6px -1px var(--card-shadow);
}
.regex-card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; flex-wrap: wrap; gap: 0.5rem; }
.regex-card-header h4 { margin: 0; font-size: 1.05rem; }
.regex-card-actions { display: flex; gap: 0.5rem; }

.btn-chip {
    background: var(--bg-light); border: 1px solid var(--border-color); color: var(--text-main);
    font-size: 0.78rem; font-weight: 600; padding: 0.4rem 0.85rem; border-radius: 50px;
    cursor: pointer; transition: all 0.15s ease; white-space: nowrap;
}
.btn-chip:hover { border-color: var(--cat-programming); color: var(--cat-programming); }

.regex-input-wrapper {
    display: flex; align-items: center; background: var(--bg-light);
    border: 1px solid var(--border-color); border-radius: 10px; padding: 0.3rem 0.75rem;
    font-family: var(--mono-font); margin-bottom: 1rem; transition: border-color var(--transition-speed);
}
.regex-input-wrapper:focus-within { border-color: var(--cat-programming); }
.regex-delimiter { color: var(--text-muted); font-weight: 700; font-size: 1.1rem; }
.regex-pattern-input {
    flex: 1; background: transparent; border: none; outline: none; color: var(--cat-programming);
    font-family: var(--mono-font); font-size: 0.95rem; padding: 0.55rem 0.4rem; min-width: 0;
}
.regex-flags-input {
    width: 70px; background: transparent; border: none; outline: none; color: var(--text-main);
    font-family: var(--mono-font); font-size: 0.95rem; padding: 0.55rem 0.4rem; text-align: center;
}

.regex-flags-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.25rem; }
.flag-chip {
    background: var(--bg-light); border: 2px solid var(--border-color); color: var(--text-muted);
    border-radius: 8px; padding: 0.4rem 0.65rem; font-family: var(--mono-font); font-weight: 700;
    font-size: 0.85rem; cursor: pointer; display: flex; flex-direction: column; align-items: center;
    gap: 0.1rem; transition: all 0.15s ease; line-height: 1.1;
}
.flag-chip small { font-weight: 500; font-size: 0.6rem; color: var(--text-muted); font-family: var(--font-family); }
.flag-chip.active { border-color: var(--cat-programming); background: var(--tool-accent-tint); color: var(--cat-programming); }
.flag-chip.active small { color: var(--cat-programming); }

.quick-patterns label {
    display: block; font-size: 0.85rem; font-weight: 600; color: var(--text-main); margin-bottom: 0.5rem;
}
.form-control {
    width: 100%; padding: 0.6rem 0.75rem; border: 1px solid var(--border-color); border-radius: 8px;
    background-color: var(--bg-main); color: var(--text-main); font-family: inherit; font-size: 0.9rem;
    outline: none; transition: border-color var(--transition-speed);
}
.form-control:focus { border-color: var(--cat-programming); }

.regex-error {
    margin-top: 1rem; padding: 0.65rem 0.9rem; border-radius: 8px; background: rgba(220,38,38,0.1);
    border: 1px solid var(--error); color: var(--error); font-size: 0.85rem; font-family: var(--mono-font);
}

.test-text-area {
    width: 100%; min-height: 220px; resize: vertical; padding: 0.9rem;
    border: 1px solid var(--border-color); border-radius: 10px; background: var(--bg-light);
    color: var(--text-main); font-family: var(--mono-font); font-size: 0.88rem; line-height: 1.6;
    outline: none; transition: border-color var(--transition-speed);
}
.test-text-area:focus { border-color: var(--cat-programming); }
.text-meta { margin-top: 0.6rem; font-size: 0.78rem; color: var(--text-muted); }

/* Results Card */
.results-card {
    background: var(--bg-main); border: 1px solid var(--border-color); border-radius: 16px;
    padding: 1.5rem; box-shadow: 0 4px 6px -1px var(--card-shadow);
}
.results-header {
    display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap;
    gap: 1rem; margin-bottom: 1.25rem;
}
.results-header-title { display: flex; align-items: center; gap: 0.75rem; }
.results-header-title h4 { margin: 0; font-size: 1.05rem; }
.file-count-badge {
    background: var(--cat-programming); color: #fff; font-size: 0.75rem;
    padding: 0.25rem 0.6rem; border-radius: 20px; font-weight: 600;
}
.results-actions { display: flex; gap: 0.6rem; flex-wrap: wrap; align-items: center; }
.sort-select { width: auto; padding: 0.5rem 0.75rem; font-size: 0.82rem; }

.export-dropdown { position: relative; }
.export-menu {
    position: absolute; top: calc(100% + 0.4rem); right: 0; background: var(--bg-main);
    border: 1px solid var(--border-color); border-radius: 10px; box-shadow: 0 10px 25px -5px var(--card-shadow);
    display: flex; flex-direction: column; min-width: 180px; overflow: hidden; z-index: 50;
}
.export-menu[hidden] { display: none; }
.export-menu button {
    background: none; border: none; text-align: left; padding: 0.7rem 1rem; font-size: 0.85rem;
    color: var(--text-main); cursor: pointer; transition: background 0.15s ease; font-family: inherit;
}
.export-menu button:hover { background: var(--bg-light); color: var(--cat-programming); }

/* Highlighted preview */
.highlighted-preview {
    background: var(--bg-light); border: 1px solid var(--border-color); border-radius: 10px;
    padding: 1rem; margin-bottom: 1.5rem; max-height: 260px; overflow-y: auto;
    font-family: var(--mono-font); font-size: 0.85rem; line-height: 1.7; white-space: pre-wrap;
    word-break: break-word; color: var(--text-main);
}
.match-highlight {
    background: var(--cat-programming); color: #052e1f; border-radius: 3px; padding: 0 2px;
    font-weight: 600;
}

/* Results table */
.results-table-wrapper { overflow-x: auto; }
.results-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.results-table th {
    text-align: left; padding: 0.6rem 0.75rem; color: var(--text-muted); font-size: 0.75rem;
    text-transform: uppercase; letter-spacing: 0.4px; border-bottom: 2px solid var(--border-color);
}
.results-table td {
    padding: 0.65rem 0.75rem; border-bottom: 1px solid var(--border-color); color: var(--text-main);
    font-family: var(--mono-font); font-size: 0.82rem; vertical-align: top; word-break: break-word;
}
.results-table tr:last-child td { border-bottom: none; }
.results-table td.match-cell { color: var(--cat-programming); font-weight: 600; }

.results-empty { color: var(--text-muted); text-align: center; padding: 2rem 1rem; font-size: 0.9rem; }

/* Cheat Sheet */
.cheat-search { max-width: 480px; margin: 0 auto 2.5rem; display: block; text-align: center; }
.cheat-sheet-group { margin-bottom: 2.5rem; }
.cheat-sheet-group-title {
    font-size: 1.1rem; font-weight: 700; margin-bottom: 1rem; color: var(--text-main);
    display: flex; align-items: center; gap: 0.5rem;
}
.cheat-sheet-group-title::before {
    content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--cat-programming); display: inline-block;
}
.cheat-table-wrapper {
    background: var(--bg-main); border: 1px solid var(--border-color); border-radius: 12px; overflow: hidden;
}
.cheat-table { width: 100%; border-collapse: collapse; }
.cheat-table th {
    text-align: left; padding: 0.7rem 1rem; font-size: 0.75rem; color: var(--text-muted);
    text-transform: uppercase; letter-spacing: 0.4px; background: var(--bg-light); border-bottom: 1px solid var(--border-color);
}
.cheat-table td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--border-color); font-size: 0.88rem; }
.cheat-table tr:last-child td { border-bottom: none; }
.cheat-table td.cheat-token {
    font-family: var(--mono-font); font-weight: 700; color: var(--cat-programming); white-space: nowrap; width: 1%;
}
.cheat-table td.cheat-example { font-family: var(--mono-font); color: var(--text-muted); font-size: 0.82rem; }
.cheat-table td.cheat-desc { color: var(--text-main); }
.cheat-row-hidden { display: none; }

.feature-card {
    background: var(--bg-main); border: 1px solid var(--border-color); border-radius: 12px;
    padding: 1.5rem; height: 100%;
}

.faq-accordion { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 1rem; }
.accordion-item { background: var(--bg-main); border: 1px solid var(--border-color); border-radius: 8px; overflow: hidden; }
.accordion-header {
    width: 100%; text-align: left; padding: 1.25rem; background: none; border: none;
    font-size: 1.05rem; font-weight: 600; color: var(--text-main); cursor: pointer;
    display: flex; justify-content: space-between; align-items: center; font-family: var(--font-family);
}
.accordion-header svg { transition: transform 0.3s ease; }
.accordion-header[aria-expanded="true"] svg { transform: rotate(180deg); }
.accordion-content {
    max-height: 0;
    overflow: hidden;
    padding: 0 1.25rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: max-height 0.35s ease, padding 0.35s ease;
}

.accordion-content.open {
    max-height: 600px;
    padding: 0 1.25rem 1.25rem;
}
@media (max-width: 767px) {
    .results-header { flex-direction: column; align-items: flex-start; }
    .results-actions { width: 100%; }
    .sort-select { flex: 1; }
}