*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --font-display:'Syne',sans-serif;--font-mono:'DM Mono',monospace;
  --font-tamil:'Noto Sans Tamil','Syne',sans-serif;
  --radius:10px;--radius-sm:6px;--transition:.3s cubic-bezier(.4,0,.2,1);
}
[data-theme="light"]{
  --bg:#f5f3ee;--bg-elevated:#faf8f4;--surface:#fff;--surface-hover:#f0ece4;
  --border:#e0dbd2;--border-focus:#b8860b;--accent:#b8860b;--accent-dim:#b8860b14;
  --accent-glow:#b8860b22;--text-primary:#1a1815;--text-secondary:#6b6560;
  --text-muted:#a09a92;--danger:#c0392b;--success:#1a8a4a;
  --drop-bg:#b8860b08;--drop-border:#b8860b30;--grain-opacity:.015;
  --shadow:0 8px 32px rgba(0,0,0,.06);--shadow-lg:0 24px 64px rgba(0,0,0,.1);
}
[data-theme="dark"]{
  --bg:#0a0a0b;--bg-elevated:#131315;--surface:#1a1a1e;--surface-hover:#222228;
  --border:#2a2a30;--border-focus:#d4a017;--accent:#d4a017;--accent-dim:#d4a01720;
  --accent-glow:#d4a01740;--text-primary:#f2f0eb;--text-secondary:#9e9a93;
  --text-muted:#5c5955;--danger:#e74c3c;--success:#2ecc71;
  --drop-bg:#d4a01708;--drop-border:#d4a01730;--grain-opacity:.025;
  --shadow:0 8px 32px rgba(0,0,0,.4);--shadow-lg:0 24px 64px rgba(0,0,0,.5);
}
body::before{
  content:'';position:fixed;inset:0;z-index:9999;pointer-events:none;
  opacity:var(--grain-opacity);
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size:128px 128px;
}
body{
  font-family:var(--font-mono);background:var(--bg);color:var(--text-primary);
  min-height:100vh;transition:background var(--transition),color var(--transition);
  line-height:1.6;font-size:14px;
}
[data-ui-lang="ta"] body{font-family:var(--font-tamil)}
.app{max-width:1200px;margin:0 auto;padding:24px 32px 64px}

/* HEADER */
.header{display:flex;justify-content:space-between;align-items:flex-start;padding:28px 0 36px;border-bottom:1px solid var(--border);margin-bottom:36px}
.logo{font-family:var(--font-display);font-size:26px;font-weight:800;letter-spacing:-.03em;line-height:1.1}
.logo span{color:var(--accent)}
.tagline{font-size:11px;color:var(--text-muted);letter-spacing:.08em;text-transform:uppercase;margin-top:4px}
[data-ui-lang="ta"] .tagline{font-family:var(--font-tamil);text-transform:none;letter-spacing:.02em;font-size:12px}
.header-right{display:flex;align-items:center;gap:10px}

/* BUTTONS */
.lang-toggle{padding:6px 16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-family:var(--font-display);font-size:12px;font-weight:700;cursor:pointer;transition:all var(--transition);letter-spacing:.03em;white-space:nowrap}
.lang-toggle:hover{border-color:var(--accent);color:var(--accent)}
.theme-toggle{width:54px;height:28px;background:var(--surface);border:1px solid var(--border);border-radius:14px;cursor:pointer;transition:all var(--transition);display:flex;align-items:center;padding:0 3px}
.theme-toggle:hover{border-color:var(--accent)}
.toggle-thumb{width:22px;height:22px;border-radius:50%;background:var(--accent);transition:transform var(--transition);display:flex;align-items:center;justify-content:center;font-size:11px;color:#fff}
[data-theme="dark"] .toggle-thumb{transform:translateX(26px)}

/* GRID */
.main-grid{display:grid;grid-template-columns:330px 1fr;gap:28px;align-items:start}
@media(max-width:860px){.main-grid{grid-template-columns:1fr}.app{padding:16px 18px 48px}.header{flex-direction:column;gap:14px}.sidebar{position:static!important}}

/* SIDEBAR */
.sidebar{display:flex;flex-direction:column;gap:18px;position:sticky;top:24px}
.panel{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);padding:18px;transition:all var(--transition)}
.panel-title{font-family:var(--font-display);font-size:10px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--text-muted);margin-bottom:14px}
[data-ui-lang="ta"] .panel-title{font-family:var(--font-tamil);font-size:11px;letter-spacing:.04em;text-transform:none;font-weight:600}

/* DROP ZONE */
.drop-zone{border:2px dashed var(--drop-border);background:var(--drop-bg);border-radius:var(--radius);padding:28px 18px;text-align:center;cursor:pointer;transition:all var(--transition)}
.drop-zone:hover,.drop-zone.drag-over{border-color:var(--accent);background:var(--accent-dim)}
.drop-icon{font-size:32px;margin-bottom:8px;display:block;color:var(--accent)}
.drop-text{font-size:13px;color:var(--text-secondary)}
.drop-text strong{color:var(--accent);font-weight:500}
.drop-formats{font-size:11px;color:var(--text-muted);margin-top:6px}
.file-input{display:none}

/* FILE PREVIEW */
.file-preview{display:none;margin-top:12px;padding:10px 12px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);align-items:center;gap:10px}
.file-preview.visible{display:flex}
.file-preview-thumb{width:38px;height:38px;border-radius:var(--radius-sm);background:var(--bg);display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0;overflow:hidden}
.file-preview-thumb img{width:100%;height:100%;object-fit:cover;border-radius:var(--radius-sm)}
.file-info{flex:1;min-width:0}
.file-name{font-size:12px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.file-size{font-size:11px;color:var(--text-muted)}
.file-remove{background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:15px;padding:4px;border-radius:4px;transition:all var(--transition);line-height:1}
.file-remove:hover{color:var(--danger)}

/* PDF PAGES */
.pdf-pages{display:none;margin-top:12px}
.pdf-pages.visible{display:block}
.pdf-pages label{font-size:12px;color:var(--text-secondary);display:block;margin-bottom:6px}
[data-ui-lang="ta"] .pdf-pages label{font-family:var(--font-tamil)}
.select-input{width:100%;padding:9px 12px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-family:var(--font-mono);font-size:12px;cursor:pointer;transition:border-color var(--transition);appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239e9a93' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center}
.select-input:focus{outline:none;border-color:var(--border-focus)}
[data-ui-lang="ta"] .select-input{font-family:var(--font-tamil)}

/* LANGUAGES */
.lang-group{margin-bottom:14px}
.lang-group:last-child{margin-bottom:0}
.lang-label{font-size:12px;color:var(--text-secondary);margin-bottom:6px;display:flex;align-items:center;gap:6px}
[data-ui-lang="ta"] .lang-label{font-family:var(--font-tamil)}
.lang-badge{font-size:9px;padding:1px 6px;background:var(--accent-dim);color:var(--accent);border-radius:3px;font-weight:500;letter-spacing:.05em;text-transform:uppercase}
[data-ui-lang="ta"] .lang-badge{text-transform:none;font-family:var(--font-tamil);letter-spacing:0}
.lang-note{font-size:10px;color:var(--text-muted);margin-top:10px;line-height:1.6}
[data-ui-lang="ta"] .lang-note{font-family:var(--font-tamil);font-size:11px}

/* EXTRACT BUTTON */
.btn-extract{width:100%;padding:13px 20px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius-sm);font-family:var(--font-display);font-size:13px;font-weight:700;letter-spacing:.04em;cursor:pointer;transition:all var(--transition)}
[data-ui-lang="ta"] .btn-extract{font-family:var(--font-tamil);letter-spacing:0}
.btn-extract:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 20px var(--accent-glow)}
.btn-extract:disabled{opacity:.4;cursor:not-allowed}

/* PROGRESS */
.progress-area{display:none;margin-top:14px}
.progress-area.visible{display:block}
.progress-bar-track{width:100%;height:5px;background:var(--surface);border-radius:3px;overflow:hidden;margin-bottom:8px}
.progress-bar-fill{height:100%;background:var(--accent);border-radius:3px;width:0%;transition:width .3s ease}
.progress-status{font-size:11px;color:var(--text-muted);display:flex;justify-content:space-between}
[data-ui-lang="ta"] .progress-status{font-family:var(--font-tamil)}
.progress-percent{color:var(--accent);font-weight:500}

/* OUTPUT */
.output-area{min-height:400px;display:flex;flex-direction:column}
.output-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--border)}
.output-title{font-family:var(--font-display);font-size:15px;font-weight:700}
[data-ui-lang="ta"] .output-title{font-family:var(--font-tamil);font-weight:600}
.output-actions{display:flex;gap:6px}
.btn-action{padding:6px 12px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-secondary);font-family:var(--font-mono);font-size:11px;cursor:pointer;transition:all var(--transition);display:flex;align-items:center;gap:4px}
[data-ui-lang="ta"] .btn-action{font-family:var(--font-tamil)}
.btn-action:hover{border-color:var(--accent);color:var(--accent)}
.btn-action.copied{border-color:var(--success);color:var(--success)}

/* DOWNLOAD DROPDOWN */
.download-wrapper{position:relative}
.download-menu{display:none;position:absolute;top:calc(100% + 6px);right:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);box-shadow:var(--shadow-lg);min-width:220px;z-index:100;overflow:hidden}
.download-menu.open{display:block;animation:fadeDown .2s ease}
@keyframes fadeDown{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}
.download-option{display:flex;align-items:center;gap:10px;padding:10px 14px;font-size:12px;color:var(--text-primary);cursor:pointer;transition:background var(--transition);border:none;background:none;width:100%;text-align:left;font-family:var(--font-mono)}
[data-ui-lang="ta"] .download-option{font-family:var(--font-tamil)}
.download-option:hover{background:var(--accent-dim)}
.download-option .opt-icon{font-size:15px;width:20px;text-align:center;flex-shrink:0;color:var(--accent)}
.download-option .opt-text{display:flex;flex-direction:column;gap:1px}
.download-option .opt-label{font-weight:500}
.download-option .opt-desc{font-size:10px;color:var(--text-muted)}
.download-divider{height:1px;background:var(--border);margin:0}

/* PAGE SEPARATOR ROW */
.page-sep-row{display:none;align-items:center;justify-content:space-between;padding:10px 14px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:10px}
.page-sep-row.visible{display:flex}
.page-sep-left{display:flex;align-items:center;gap:8px}
.page-sep-label{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--text-secondary);cursor:pointer;user-select:none}
[data-ui-lang="ta"] .page-sep-label{font-family:var(--font-tamil)}
.page-sep-label input[type="checkbox"]{accent-color:var(--accent);width:14px;height:14px;cursor:pointer}
.page-count-badge{font-size:10px;padding:2px 8px;background:var(--accent-dim);color:var(--accent);border-radius:3px;font-weight:500}
.sep-status{font-size:10px;padding:3px 8px;border-radius:3px;font-weight:500;letter-spacing:.03em;white-space:nowrap}
.sep-status.on{background:#1a8a4a18;color:var(--success)}
.sep-status.off{background:var(--danger)15;color:var(--danger)}
[data-ui-lang="ta"] .sep-status{font-family:var(--font-tamil);letter-spacing:0}

/* TEXTAREA */
.output-content{flex:1;position:relative}
.output-text{width:100%;min-height:320px;padding:16px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-family:var(--font-mono);font-size:13px;line-height:1.8;resize:vertical;transition:border-color var(--transition)}
.output-text:focus{outline:none;border-color:var(--border-focus)}
.output-text::placeholder{color:var(--text-muted);font-style:italic}

/* EMPTY STATE */
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:320px;border:1px dashed var(--border);border-radius:var(--radius);text-align:center;padding:40px}
.empty-icon{font-size:44px;margin-bottom:14px;opacity:.25}
.empty-title{font-family:var(--font-display);font-size:15px;font-weight:600;color:var(--text-secondary);margin-bottom:6px}
[data-ui-lang="ta"] .empty-title{font-family:var(--font-tamil)}
.empty-desc{font-size:12px;color:var(--text-muted);max-width:260px}
[data-ui-lang="ta"] .empty-desc{font-family:var(--font-tamil)}

/* STATS */
.stats-bar{display:none;margin-top:14px;padding:12px 16px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-sm);gap:20px;flex-wrap:wrap}
.stats-bar.visible{display:flex}
.stat-item{display:flex;flex-direction:column;gap:2px}
.stat-label{font-size:10px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em}
[data-ui-lang="ta"] .stat-label{font-family:var(--font-tamil);text-transform:none;letter-spacing:0;font-size:10px}
.stat-value{font-size:13px;font-weight:500;color:var(--accent)}

/* TOAST */
.toast{position:fixed;bottom:24px;right:24px;padding:12px 20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);font-size:12px;color:var(--text-primary);box-shadow:var(--shadow-lg);transform:translateY(100px);opacity:0;transition:all .4s cubic-bezier(.34,1.56,.64,1);z-index:1000}
[data-ui-lang="ta"] .toast{font-family:var(--font-tamil)}
.toast.show{transform:translateY(0);opacity:1}
.toast.error{border-color:var(--danger);color:var(--danger)}
.toast.success{border-color:var(--success);color:var(--success)}

/* ANIMATIONS */
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}
.sidebar .panel{animation:fadeUp .5s ease forwards;opacity:0}
.sidebar .panel:nth-child(1){animation-delay:.05s}
.sidebar .panel:nth-child(2){animation-delay:.15s}
.sidebar .panel:nth-child(3){animation-delay:.25s}
.output-area{animation:fadeUp .5s ease forwards;animation-delay:.1s;opacity:0}
.processing .progress-status{animation:pulse 1.5s ease infinite}

::-webkit-scrollbar{width:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}