/* ============================================================
   DEV TOOL SHELL — Shared layout for dark editor tools
   Prefix: dt-
   Used by: CSS Minifier, JS Minifier, HTML Formatter, Regex Tester, JSON Formatter
   ============================================================ */

/* Full-width page — no sidebar */
.dt-page{max-width:var(--mega-max-w);margin:0 auto;padding:32px 24px 60px}
.dt-header{margin-bottom:24px}
.dt-header__cat{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--brand);background:var(--brand-light);padding:4px 12px;border-radius:20px;margin-bottom:14px}
.dt-header__title{font-family:var(--font-display);font-size:clamp(26px,4vw,36px);font-weight:800;color:var(--dark);line-height:1.2;margin-bottom:10px;letter-spacing:-.01em}
.dt-header__desc{font-size:16px;color:var(--gray-500);line-height:1.65;max-width:720px}

/* Shell */
.dt-shell{background:var(--dark);border-radius:var(--radius-xl);overflow:hidden;border:1px solid rgba(255,255,255,.06);box-shadow:var(--shadow-xl);margin-bottom:24px}

/* Toolbar */
.dt-toolbar{display:flex;align-items:center;gap:6px;padding:12px 18px;background:var(--dark-2);border-bottom:1px solid rgba(255,255,255,.06);flex-wrap:wrap}
.dt-toolbar__group{display:flex;align-items:center;gap:4px}
.dt-toolbar__sep{width:1px;height:24px;background:rgba(255,255,255,.08);margin:0 8px;flex-shrink:0}
.dt-tool-btn{padding:8px 16px;border-radius:6px;font-size:12.5px;font-weight:700;color:rgba(255,255,255,.55);background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);transition:all .2s;font-family:var(--font-display);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;letter-spacing:.3px}
.dt-tool-btn:hover{background:rgba(255,255,255,.1);color:var(--white);border-color:rgba(255,255,255,.15)}
.dt-tool-btn--primary{background:var(--brand);color:var(--white);border-color:var(--brand);box-shadow:0 2px 10px rgba(11,99,246,.3)}
.dt-tool-btn--primary:hover{background:var(--brand-dark);box-shadow:0 4px 16px rgba(11,99,246,.4);transform:translateY(-1px)}
.dt-tool-btn--danger{color:rgba(239,68,68,.7)}
.dt-tool-btn--danger:hover{background:rgba(239,68,68,.1);border-color:rgba(239,68,68,.3);color:var(--red)}
.dt-tool-btn--active{background:rgba(11,99,246,.15);color:var(--brand);border-color:rgba(11,99,246,.3)}
.dt-tool-btn svg{width:14px;height:14px}
.dt-indent-select{padding:7px 30px 7px 12px;border-radius:6px;font-size:12.5px;font-weight:700;color:rgba(255,255,255,.55);background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);font-family:var(--font-mono);appearance:none;-webkit-appearance:none;outline:none;cursor:pointer;transition:all .2s;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%2364748B'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center}
.dt-indent-select:hover{border-color:rgba(255,255,255,.15);color:var(--white)}
.dt-indent-select option{background:var(--dark);color:var(--white)}
.dt-upload-label{display:inline-flex;align-items:center;gap:6px;cursor:pointer;padding:8px 16px;border-radius:6px;font-size:12.5px;font-weight:700;color:rgba(255,255,255,.55);background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);transition:all .2s;font-family:var(--font-display);letter-spacing:.3px}
.dt-upload-label:hover{background:rgba(255,255,255,.1);color:var(--white);border-color:rgba(255,255,255,.15)}
.dt-upload-label input{display:none}
.dt-upload-label svg{width:14px;height:14px}

/* Panels */
.dt-panels{display:grid;grid-template-columns:1fr 1fr;min-height:480px}
.dt-panel{display:flex;flex-direction:column;min-width:0}
.dt-panel+.dt-panel{border-left:1px solid rgba(255,255,255,.06)}
.dt-panel__header{display:flex;align-items:center;justify-content:space-between;padding:10px 18px;background:rgba(255,255,255,.02);border-bottom:1px solid rgba(255,255,255,.05);min-height:44px}
.dt-panel__title{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:rgba(255,255,255,.3);display:flex;align-items:center;gap:8px}
.dt-panel__badge{font-size:10px;font-weight:700;padding:3px 10px;border-radius:10px;font-family:var(--font-mono)}
.dt-panel__badge--ok{background:rgba(16,185,129,.15);color:var(--green)}
.dt-panel__badge--err{background:rgba(239,68,68,.15);color:var(--red)}
.dt-panel__badge--info{background:rgba(11,99,246,.12);color:#60a5fa}
.dt-tabs{display:flex;gap:2px}
.dt-tab{padding:6px 14px;border-radius:6px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:rgba(255,255,255,.3);background:transparent;transition:all .2s;cursor:pointer;font-family:var(--font-display)}
.dt-tab:hover{color:rgba(255,255,255,.55)}
.dt-tab.active{background:rgba(255,255,255,.06);color:rgba(255,255,255,.85)}

/* Code areas */
.dt-code-wrap{flex:1;position:relative;overflow:hidden;display:flex;flex-direction:column}
.dt-code{width:100%;flex:1;padding:18px;background:transparent;border:none;outline:none;resize:none;font-family:var(--font-mono);font-size:13px;line-height:1.75;color:#E2E8F0;tab-size:2;-moz-tab-size:2;white-space:pre;overflow:auto}
.dt-code::placeholder{color:rgba(255,255,255,.15)}
.dt-code::-webkit-scrollbar{width:8px;height:8px}
.dt-code::-webkit-scrollbar-track{background:transparent}
.dt-code::-webkit-scrollbar-thumb{background:rgba(255,255,255,.08);border-radius:4px}
.dt-code::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,.16)}
.dt-code--output{color:#A5D6FF}

/* Highlighted output div */
.dt-output{flex:1;padding:18px;font-family:var(--font-mono);font-size:13px;line-height:1.75;color:#E2E8F0;overflow:auto;white-space:pre;tab-size:2;-moz-tab-size:2;user-select:text;-webkit-user-select:text}
.dt-output::-webkit-scrollbar{width:8px;height:8px}
.dt-output::-webkit-scrollbar-track{background:transparent}
.dt-output::-webkit-scrollbar-thumb{background:rgba(255,255,255,.08);border-radius:4px}

/* Error banner */
.dt-error{display:none;padding:12px 18px;background:rgba(239,68,68,.06);border-top:1px solid rgba(239,68,68,.15);font-family:var(--font-mono);font-size:12.5px;color:var(--red);line-height:1.6}
.dt-error.show{display:flex;align-items:flex-start;gap:10px}
.dt-error__icon{font-size:15px;flex-shrink:0;margin-top:1px}
.dt-error__msg{flex:1;word-break:break-word}

/* Drop zone */
.dt-drop{position:absolute;inset:0;display:none;align-items:center;justify-content:center;background:rgba(11,99,246,.06);border:2px dashed var(--brand);z-index:5;pointer-events:none}
.dt-drop.show{display:flex}
.dt-drop__text{font-family:var(--font-display);font-weight:700;font-size:15px;color:var(--brand)}

/* Stats + actions */
.dt-info-row{display:flex;gap:16px;margin-bottom:24px;flex-wrap:wrap;align-items:stretch}
.dt-stats-card{flex:1;min-width:0;display:flex;align-items:center;gap:18px;padding:16px 22px;background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);flex-wrap:wrap}
.dt-stats-card__item{display:flex;align-items:center;gap:5px;font-size:13px;color:var(--gray-500);font-weight:500}
.dt-stats-card__value{font-family:var(--font-mono);font-weight:700;color:var(--brand)}
.dt-stats-card__dot{width:3px;height:3px;border-radius:50%;background:var(--gray-300)}
.dt-action-group{display:flex;gap:10px;flex-shrink:0;align-items:center}
.dt-action-group .btn--generate{min-width:160px}

/* Feature strip */
.dt-features{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:32px}
.dt-feature{display:flex;align-items:flex-start;gap:12px;padding:18px;background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius-md);transition:border-color .2s,box-shadow .2s}
.dt-feature:hover{border-color:var(--brand);box-shadow:var(--shadow-md)}
.dt-feature__icon{width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.dt-feature__icon--blue{background:var(--brand-light);color:var(--brand)}
.dt-feature__icon--green{background:var(--green-light);color:var(--green)}
.dt-feature__icon--purple{background:var(--purple-light);color:var(--purple)}
.dt-feature__icon--orange{background:var(--accent-light);color:var(--accent)}
.dt-feature__title{font-family:var(--font-display);font-weight:700;font-size:13.5px;color:var(--dark);margin-bottom:2px}
.dt-feature__desc{font-size:12px;color:var(--gray-500);line-height:1.5}

/* CTA banner */
.dt-cta-banner{display:flex;align-items:center;justify-content:space-between;padding:24px 32px;background:linear-gradient(135deg,var(--dark),var(--dark-2));border-radius:var(--radius-lg);color:var(--white);margin-bottom:32px;position:relative;overflow:hidden;gap:24px;flex-wrap:wrap}
.dt-cta-banner::before{content:'';position:absolute;top:-50px;right:-50px;width:200px;height:200px;background:radial-gradient(circle,rgba(11,99,246,.2),transparent 70%);pointer-events:none}
.dt-cta-banner__text{position:relative}
.dt-cta-banner__title{font-family:var(--font-display);font-weight:700;font-size:17px;margin-bottom:4px}
.dt-cta-banner__desc{font-size:13.5px;color:var(--gray-400);line-height:1.5}
.dt-cta-banner .btn--primary{flex-shrink:0;position:relative}

/* Toast */
.dt-toast{position:fixed;bottom:32px;left:50%;transform:translateX(-50%) translateY(16px);background:var(--green);color:var(--white);font-size:13px;font-weight:700;padding:10px 24px;border-radius:var(--radius-sm);opacity:0;transition:opacity .25s,transform .25s;pointer-events:none;z-index:999;box-shadow:var(--shadow-lg)}
.dt-toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* Regex-specific: match highlights, test input */
.dt-regex-input{width:100%;padding:12px 16px;background:rgba(255,255,255,.04);border:2px solid rgba(255,255,255,.08);border-radius:6px;font-family:var(--font-mono);font-size:14px;color:#E2E8F0;outline:none;transition:border-color .25s,box-shadow .25s}
.dt-regex-input:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(11,99,246,.12)}
.dt-regex-input::placeholder{color:rgba(255,255,255,.15)}
.dt-regex-row{display:flex;gap:10px;padding:12px 18px;border-bottom:1px solid rgba(255,255,255,.06);align-items:center;flex-wrap:wrap}
.dt-regex-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:rgba(255,255,255,.3);flex-shrink:0;min-width:60px}
.dt-flags{display:flex;gap:4px;flex-shrink:0}
.dt-flag{width:32px;height:32px;border-radius:6px;font-family:var(--font-mono);font-size:13px;font-weight:700;color:rgba(255,255,255,.4);background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s}
.dt-flag:hover{color:var(--white);border-color:rgba(255,255,255,.15)}
.dt-flag.active{background:rgba(11,99,246,.15);color:var(--brand);border-color:rgba(11,99,246,.3)}
.dt-match-hl{background:rgba(11,99,246,.25);border-radius:2px;padding:1px 0;border-bottom:2px solid var(--brand)}
.dt-match-group{background:rgba(139,92,246,.2);border-bottom:2px solid var(--purple)}
.dt-match-list{padding:18px;font-family:var(--font-mono);font-size:12.5px;line-height:1.85;color:#E2E8F0;overflow:auto}
.dt-match-item{padding:8px 12px;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.05);border-radius:6px;margin-bottom:6px}
.dt-match-item__idx{color:#6E7681;font-size:11px;margin-right:8px}
.dt-match-item__val{color:#7EE787}
.dt-match-item__group{color:#A5D6FF;font-size:11px;margin-left:12px}
.dt-match-count{font-size:12px;font-weight:700;padding:3px 10px;border-radius:10px;font-family:var(--font-mono)}

/* Responsive */
@media(max-width:1024px){.dt-features{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){
  .dt-panels{grid-template-columns:1fr!important;min-height:auto}
  .dt-panel+.dt-panel{border-left:none;border-top:1px solid rgba(255,255,255,.06)}
  .dt-code,.dt-output,.dt-match-list{min-height:250px}
  .dt-toolbar{padding:10px 12px;gap:4px}
  .dt-tool-btn{padding:7px 12px;font-size:11.5px}
  .dt-info-row{flex-direction:column}
  .dt-action-group{width:100%}
  .dt-action-group .btn--generate,.dt-action-group .btn--secondary{flex:1}
  .dt-features{gap:10px}
  .dt-cta-banner{flex-direction:column;text-align:center;padding:20px}
  .dt-cta-banner .btn--primary{width:100%}
  .dt-regex-row{flex-direction:column;align-items:stretch}
}
@media(max-width:480px){
  .dt-page{padding:20px 16px 40px}
  .dt-code,.dt-output{min-height:200px;font-size:12px}
  .dt-features{grid-template-columns:1fr}
  .dt-toolbar__sep{display:none}
  .dt-action-group{flex-direction:column}
  .dt-action-group .btn--generate,.dt-action-group .btn--secondary{width:100%}
  .dt-stats-card{padding:12px 14px;gap:10px}
}