/* ==========================================================================
   QDT shared utility-tool theme (wwwroot/css/shared/qdt-utility.css)
   --------------------------------------------------------------------------
   One indigo/violet visual language for the client-side developer utilities -
   timestamp, date maths, password, token, random number and mock data - so
   they read as a family without each page carrying its own copy of the same
   ~200 lines of hero/card/button CSS.

   Every rule is namespaced under .qdt-util, which each page sets on its root
   element alongside its own page class for anything genuinely page-specific.
   ========================================================================== */

.qdt-util {
    --u-bg: #f6f7fe;
    --u-surface: #ffffff;
    --u-text: #14163a;
    --u-soft: #454a75;
    --u-muted: #6b7196;
    --u-line: rgba(224, 226, 245, 0.95);
    --u-brand: #5b53e0;
    --u-brand-2: #8b5cf6;
    --u-brand-dark: #4038c4;
    --u-brand-soft: #f0efff;
    --u-accent: #06b6d4;
    --u-accent-soft: #ecfeff;
    --u-success: #0f9b5c;
    --u-success-soft: #e9fbf2;
    --u-warning: #d97706;
    --u-warning-soft: #fff7ed;
    --u-danger: #e0384f;
    --u-danger-soft: #fff0f2;
    --u-shadow: 0 12px 40px rgba(40, 36, 120, 0.10);
    --u-radius: 20px;

    font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    color: var(--u-text);
}

.qdt-util * { box-sizing: border-box; }
.qdt-util a { color: inherit; }
.qdt-util button, .qdt-util input, .qdt-util select, .qdt-util textarea { font: inherit; }
.qdt-util button { cursor: pointer; }
.qdt-util code, .qdt-util .mono { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }
.qdt-util .hidden { display: none !important; }

.qdt-util .page-shell {
    width: min(1200px, calc(100% - 32px));
    margin: 0 auto;
    padding: 24px 0 48px;
}

/* ---------------------------------------------------------------- hero */

.qdt-util .hero {
    position: relative;
    overflow: hidden;
    padding: 32px;
    border-radius: 26px;
    border: 1px solid rgba(213, 215, 243, 0.95);
    background:
        radial-gradient(circle at 8% 0%, rgba(91, 83, 224, 0.10), transparent 26%),
        radial-gradient(circle at 92% 6%, rgba(139, 92, 246, 0.10), transparent 24%),
        linear-gradient(180deg, #ffffff 0, var(--u-bg) 380px);
    box-shadow: var(--u-shadow);
}

.qdt-util .hero-heading {
    display: flex;
    align-items: center;
    gap: 18px;
    max-width: 900px;
}

.qdt-util .hero-icon {
    width: 70px;
    height: 70px;
    flex: 0 0 70px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    color: #fff;
    font-size: 30px;
    background: linear-gradient(145deg, var(--u-brand-2), var(--u-brand));
    border: 7px solid rgba(255, 255, 255, 0.85);
    box-shadow: 0 12px 26px rgba(91, 83, 224, 0.26);
}

.qdt-util h1 {
    margin: 0;
    font-size: clamp(1.75rem, 3.4vw, 2.7rem);
    letter-spacing: -0.04em;
    line-height: 1.08;
}

.qdt-util .hero-copy p {
    margin: 9px 0 0;
    color: var(--u-soft);
    font-size: 1rem;
    line-height: 1.6;
}

/* ------------------------------------------------------------- controls */

.qdt-util .controls { margin-top: 22px; display: grid; gap: 13px; }

.qdt-util .field-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 12px;
}

.qdt-util .field { display: grid; gap: 6px; min-width: 0; }

.qdt-util .field label,
.qdt-util .field-label {
    color: var(--u-soft);
    font-size: 0.76rem;
    font-weight: 850;
    letter-spacing: 0.01em;
}

.qdt-util input[type="text"],
.qdt-util input[type="number"],
.qdt-util input[type="date"],
.qdt-util input[type="datetime-local"],
.qdt-util select,
.qdt-util textarea {
    width: 100%;
    min-height: 46px;
    padding: 0 14px;
    border: 1px solid var(--u-line);
    border-radius: 12px;
    background: #fff;
    color: var(--u-text);
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.qdt-util textarea {
    padding: 12px 14px;
    min-height: 110px;
    line-height: 1.6;
    resize: vertical;
}

.qdt-util input:focus,
.qdt-util select:focus,
.qdt-util textarea:focus {
    border-color: var(--u-brand);
    box-shadow: 0 0 0 4px rgba(91, 83, 224, 0.13);
}

.qdt-util .btn-row { display: flex; flex-wrap: wrap; gap: 10px; }

.qdt-util .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    padding: 0 20px;
    border: 1px solid var(--u-line);
    border-radius: 12px;
    background: #fff;
    color: var(--u-soft);
    font-size: 0.88rem;
    font-weight: 800;
    transition: border-color 0.15s, color 0.15s, background 0.15s, transform 0.15s;
}

.qdt-util .btn:hover:not(:disabled) {
    border-color: var(--u-brand);
    color: var(--u-brand);
    transform: translateY(-1px);
}

.qdt-util .btn:disabled { opacity: 0.55; cursor: not-allowed; }

.qdt-util .btn.is-primary {
    border: 0;
    color: #fff;
    background: linear-gradient(135deg, var(--u-brand-2), var(--u-brand));
    box-shadow: 0 10px 22px rgba(91, 83, 224, 0.24);
}

.qdt-util .btn.is-primary:hover:not(:disabled) { color: #fff; }
.qdt-util .btn.is-copied { border-color: #b6e6cd; color: var(--u-success); background: var(--u-success-soft); }

/* toggle chips (character sets, options, presets) */

.qdt-util .chip-row { display: flex; flex-wrap: wrap; gap: 8px; }

.qdt-util .chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 14px;
    border: 1px solid var(--u-line);
    border-radius: 999px;
    background: #fff;
    color: var(--u-soft);
    font-size: 0.82rem;
    font-weight: 780;
    transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.qdt-util .chip:hover { border-color: var(--u-brand); }

.qdt-util .chip.is-on {
    border-color: var(--u-brand);
    background: var(--u-brand-soft);
    color: var(--u-brand-dark);
}

.qdt-util .chip .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #cdd0e8;
    flex: 0 0 auto;
}

.qdt-util .chip.is-on .dot { background: var(--u-brand); }

/* range slider */

.qdt-util .range-row { display: flex; align-items: center; gap: 14px; }
.qdt-util .range-row input[type="range"] { flex: 1 1 auto; min-height: 0; accent-color: var(--u-brand); }

.qdt-util .range-value {
    min-width: 58px;
    padding: 6px 12px;
    border-radius: 10px;
    background: var(--u-brand-soft);
    color: var(--u-brand-dark);
    font-size: 0.88rem;
    font-weight: 900;
    font-variant-numeric: tabular-nums;
    text-align: center;
}

/* ------------------------------------------------------------- messages */

.qdt-util .message { display: none; padding: 11px 14px; border-radius: 11px; font-size: 0.87rem; }
.qdt-util .message.show { display: block; }
.qdt-util .message.success { color: var(--u-success); background: var(--u-success-soft); border: 1px solid #b6e6cd; }
.qdt-util .message.error { color: var(--u-danger); background: var(--u-danger-soft); border: 1px solid #f6c8ce; }
.qdt-util .message.warning { color: var(--u-warning); background: var(--u-warning-soft); border: 1px solid #fcd9a8; }

/* --------------------------------------------------------------- cards */

.qdt-util .results { margin-top: 18px; display: grid; gap: 16px; }

.qdt-util .card {
    border: 1px solid var(--u-line);
    border-radius: var(--u-radius);
    background: var(--u-surface);
    box-shadow: 0 8px 26px rgba(40, 36, 120, 0.05);
}

.qdt-util .panel { padding: 20px; }

.qdt-util .panel-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 14px;
    font-size: 1rem;
}

.qdt-util .panel-title span:first-child {
    width: 32px;
    height: 32px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    background: var(--u-brand-soft);
    color: var(--u-brand);
}

.qdt-util .panel-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.qdt-util .panel-title-row .panel-title { margin: 0; }
.qdt-util .panel-copy { margin: 0 0 14px; color: var(--u-muted); font-size: 0.84rem; line-height: 1.6; }

/* headline output — the one big value a tool exists to produce */

.qdt-util .output-hero {
    padding: 22px;
    border-radius: 16px;
    border: 1px solid #ddd9ff;
    background: linear-gradient(145deg, #fff, var(--u-brand-soft));
}

.qdt-util .output-label {
    display: block;
    color: var(--u-muted);
    font-size: 0.72rem;
    font-weight: 850;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.qdt-util .output-value {
    display: block;
    margin-top: 8px;
    font-family: "SFMono-Regular", Consolas, monospace;
    font-size: clamp(1.2rem, 3vw, 1.9rem);
    font-weight: 900;
    color: var(--u-brand-dark);
    overflow-wrap: anywhere;
    line-height: 1.25;
}

/* stat grid */

.qdt-util .stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
}

.qdt-util .stat {
    padding: 15px;
    border: 1px solid var(--u-line);
    border-radius: 14px;
    background: #fbfbff;
}

.qdt-util .stat-label { display: block; color: var(--u-muted); font-size: 0.73rem; font-weight: 850; }
.qdt-util .stat-value {
    display: block;
    margin-top: 4px;
    font-size: 1.3rem;
    font-weight: 900;
    font-variant-numeric: tabular-nums;
    overflow-wrap: anywhere;
}
.qdt-util .stat-sub { display: block; margin-top: 2px; color: var(--u-muted); font-size: 0.74rem; }

/* key/value rows */

.qdt-util .kv-table { border: 1px solid var(--u-line); border-radius: 13px; overflow: hidden; }
.qdt-util .kv-row {
    display: grid;
    grid-template-columns: minmax(150px, 0.8fr) minmax(0, 1.2fr);
    gap: 14px;
    padding: 12px 14px;
    border-bottom: 1px solid #f0f0fa;
    font-size: 0.83rem;
}
.qdt-util .kv-row:last-child { border-bottom: 0; }
.qdt-util .kv-key { color: #3a3f6b; font-weight: 850; }
.qdt-util .kv-value { color: var(--u-soft); overflow-wrap: anywhere; }
.qdt-util .kv-value.mono { font-size: 0.8rem; }

/* generated-list output (tokens, numbers, passwords) */

.qdt-util .out-list { display: grid; gap: 8px; max-height: 380px; overflow-y: auto; }

.qdt-util .out-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 13px;
    border: 1px solid var(--u-line);
    border-radius: 11px;
    background: #fbfbff;
}

.qdt-util .out-item .value {
    flex: 1 1 auto;
    min-width: 0;
    font-family: "SFMono-Regular", Consolas, monospace;
    font-size: 0.85rem;
    color: var(--u-text);
    overflow-wrap: anywhere;
}

.qdt-util .icon-btn {
    width: 32px;
    height: 32px;
    flex: 0 0 32px;
    display: grid;
    place-items: center;
    border: 1px solid var(--u-line);
    border-radius: 9px;
    background: #fff;
    color: var(--u-muted);
    font-size: 0.85rem;
    transition: color 0.15s, border-color 0.15s;
}

.qdt-util .icon-btn:hover { color: var(--u-brand); border-color: var(--u-brand); }
.qdt-util .icon-btn.is-copied { color: var(--u-success); border-color: #b6e6cd; }

/* code / preview block */

.qdt-util .code-block {
    margin: 0;
    padding: 14px 16px;
    max-height: 420px;
    overflow: auto;
    border: 1px solid var(--u-line);
    border-radius: 13px;
    background: #12142e;
    color: #e6e7ff;
    font-family: "SFMono-Regular", Consolas, monospace;
    font-size: 0.8rem;
    line-height: 1.65;
    white-space: pre;
}

.qdt-util .note-card {
    padding: 16px 18px;
    border-left: 4px solid var(--u-brand);
    border-radius: 11px;
    color: #38356e;
    background: var(--u-brand-soft);
    font-size: 0.86rem;
    line-height: 1.6;
}

/* --------------------------------------------------------------- misc */

.qdt-util .empty-state {
    padding: 38px 22px;
    border: 1px dashed #d3d5f0;
    border-radius: 20px;
    color: var(--u-muted);
    background: rgba(255, 255, 255, 0.7);
    text-align: center;
    font-size: 0.9rem;
    line-height: 1.6;
}

.qdt-util .seg {
    display: inline-flex;
    padding: 4px;
    border: 1px solid var(--u-line);
    border-radius: 12px;
    background: #f4f4fb;
    gap: 4px;
}

.qdt-util .seg button {
    padding: 8px 15px;
    border: 0;
    border-radius: 9px;
    background: transparent;
    color: var(--u-muted);
    font-size: 0.82rem;
    font-weight: 800;
    transition: background 0.15s, color 0.15s;
}

.qdt-util .seg button.is-active { background: #fff; color: var(--u-brand-dark); box-shadow: 0 2px 6px rgba(40, 36, 120, 0.08); }

@media (max-width: 780px) {
    .qdt-util .page-shell { width: min(100% - 20px, 1200px); }
    .qdt-util .hero { padding: 22px 18px; }
    .qdt-util .hero-heading { align-items: flex-start; }
    .qdt-util .hero-icon { width: 54px; height: 54px; flex-basis: 54px; font-size: 24px; border-width: 5px; }
    .qdt-util .kv-row { grid-template-columns: 1fr; gap: 4px; }
    .qdt-util .btn { flex: 1 1 auto; }
}

@media (prefers-reduced-motion: reduce) {
    .qdt-util .btn, .qdt-util .chip, .qdt-util .icon-btn { transition: none; }
    .qdt-util .btn:hover:not(:disabled) { transform: none; }
}