:root{--primary-color: #f38020;--primary-hover: #e06d0f;--secondary-color: #6366f1;--bg-primary: #0f0f23;--bg-secondary: #1a1a2e;--bg-tertiary: #252541;--bg-panel: #1e1e2d;--bg-header: #151521;--bg-input: #14141f;--bg-card: #1a1a2e;--text-primary: #ffffff;--text-secondary: #a0a0b8;--border-color: #2d2d44;--success-color: #10b981;--navbar-bg: rgba(15, 15, 35, .85);--footer-bg: #090915;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .1);--shadow-md: 0 4px 16px rgba(0, 0, 0, .2);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .3);--shadow-glow: 0 0 20px rgba(243, 128, 32, .3);--transition: all .3s cubic-bezier(.4, 0, .2, 1);--body-bg: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #16213e 100%);--bg-input-focus: #0f0f19;--btn-github-bg: #252541}body.light-mode{--bg-primary: #f8fafc;--bg-secondary: #ffffff;--bg-tertiary: #f1f5f9;--bg-panel: #ffffff;--bg-header: #f8fafc;--bg-input: #f8fafc;--bg-card: #ffffff;--text-primary: #1e293b;--text-secondary: #64748b;--border-color: #e2e8f0;--navbar-bg: rgba(255, 255, 255, .85);--footer-bg: #f8fafc;--body-bg: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .05);--shadow-md: 0 4px 16px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .1);--bg-input-focus: #ffffff;--btn-github-bg: #f1f5f9}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--body-bg);color:var(--text-primary);min-height:100vh;line-height:1.6;overflow-y:auto;overflow-x:hidden}.container{max-width:100%;margin:0;padding:0;min-height:calc(100vh - 70px);height:auto}.navbar{width:100%;height:70px;background:var(--navbar-bg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-color);position:sticky;top:0;z-index:100}.nav-container{max-width:100%;margin:0 auto;padding:0 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1fr;gap:0;height:100%;animation:fadeInUp .6s ease-out .2s both}.editor-panel,.preview-panel{background:var(--bg-secondary);border-radius:0;border:none;overflow:hidden;transition:var(--transition)}.editor-panel:hover,.preview-panel:hover{border-color:#f380204d;box-shadow:var(--shadow-lg),var(--shadow-glow)}.panel-header{padding:1rem;background:linear-gradient(135deg,var(--bg-tertiary) 0%,var(--bg-secondary) 100%);border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}.panel-header h2{font-size:1.25rem;font-weight:600;color:var(--text-primary)}.preview-controls{display:flex;gap:.5rem}.editor-panel{height:100%;max-height:none;overflow-y:auto;overflow-x:hidden;background:var(--bg-panel);border-right:1px solid var(--border-color)}.panel-header{padding:1rem 1.25rem;background:var(--bg-header);border-bottom:1px solid 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var(--border-color);display:flex;flex-direction:column;height:calc(100vh - 120px);position:sticky;top:90px;border-radius:16px;overflow:hidden;flex-shrink:0;box-shadow:var(--shadow-lg)}.sidebar-header{padding:1.5rem;border-bottom:1px solid var(--border-color)}.sidebar-header h3{margin-bottom:1rem;font-size:1.25rem;font-weight:700;color:var(--text-primary);background:linear-gradient(to right,var(--text-primary),var(--text-secondary));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.sidebar-search{width:100%;padding:10px 16px;border-radius:10px;border:1px solid var(--border-color);background:var(--bg-input);color:var(--text-primary);font-size:.9rem;transition:var(--transition)}.sidebar-search:focus{outline:none;border-color:var(--primary-color);background:#0000004d;box-shadow:0 0 0 4px #f3802026}.sidebar-nav{flex:1;overflow-y:auto;padding:.5rem}.nav-item{display:flex;align-items:center;padding:10px 16px;margin:2px 8px;border-radius:8px;color:var(--text-secondary);text-decoration:none;font-size:.9rem;font-weight:500;cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1);border:1px solid transparent}.nav-item:hover{background:var(--bg-tertiary);color:var(--text-primary);transform:translate(4px)}.nav-item.active{background:#f380201a;color:var(--primary-color);border-color:#f380204d;box-shadow:var(--shadow-sm)}.nav-group{margin-bottom:1.5rem}.nav-group-title{padding:0 24px;margin-bottom:.75rem;font-size:.7rem;font-weight:700;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.1em;opacity:.8}.tool-main{flex:1;padding-right:20px;min-width:0}.tool-workspace,.md-workspace,.random-user-grid,.unit-converter-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;min-height:600px;margin-top:20px}.panel,.editor-panel,.preview-panel,.md-input-panel,.md-preview-panel{background:var(--bg-card);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-color);border-radius:16px;display:flex;flex-direction:column;overflow:hidden;box-shadow:var(--shadow-lg);transition:transform .3s ease,box-shadow .3s ease}.panel:hover,.editor-panel:hover,.preview-panel:hover{box-shadow:0 12px 40px #0000004d}.panel-header,.preview-header,.panel-head{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;background:var(--bg-header);border-bottom:1px solid var(--border-color)}.panel-header h2,.preview-header h2,.panel-label{font-size:.9rem;font-weight:700;color:var(--text-primary);text-transform:uppercase;letter-spacing:.05em;margin:0}.tool-header{margin-bottom:0;padding-left:10px}.tool-header h1{font-size:1.5rem;font-weight:800;margin-bottom:0;background:linear-gradient(135deg,var(--text-primary) 0%,var(--text-secondary) 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.02em}.tool-header p{color:var(--text-secondary);font-size:1.1rem;max-width:700px;line-height:1.6}@media(max-width:1024px){.tool-layout{flex-direction:column;padding:0 15px;gap:20px}.tool-sidebar{width:100%;height:auto;position:static;max-height:300px;flex-shrink:0}.tool-main{padding-right:0;width:100%}}.action-btn{background:var(--bg-tertiary);border:1px solid var(--border-color);color:var(--text-secondary);padding:6px 12px;border-radius:8px;font-size:.8rem;font-weight:500;cursor:pointer;transition:all .2s ease}.action-btn:hover{background:var(--bg-input);color:var(--text-primary);border-color:var(--primary-color);transform:translateY(-1px)}.action-btn.primary{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}.action-btn.primary:hover{background:var(--primary-hover);border-color:var(--primary-hover)}.code-editor{width:100%;height:100%;background:var(--bg-input);border:none;color:var(--success-color);font-family:Fira Code,Monaco,Consolas,monospace;font-size:.9rem;padding:1.5rem;resize:none;outline:none;line-height:1.6}