:root{--font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", Consolas, Monaco, monospace;--bg-dark: #090d16;--bg-card: rgba(17, 24, 39, .7);--bg-card-border: rgba(255, 255, 255, .08);--bg-input: rgba(15, 23, 42, .6);--bg-input-focus: rgba(30, 41, 59, .8);--primary: #ee4d2d;--primary-hover: #ff5722;--primary-glow: rgba(238, 77, 45, .3);--accent: #3b82f6;--accent-glow: rgba(59, 130, 246, .3);--text-main: #f8fafc;--text-muted: #94a3b8;--text-dim: #64748b;--success: #10b981;--error: #ef4444;--warning: #f59e0b;--radius-sm: 8px;--radius-md: 14px;--radius-lg: 20px;--shadow-main: 0 20px 50px rgba(0, 0, 0, .5);--transition-fast: all .2s ease;--transition-normal: all .3s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-dark);color:var(--text-main);min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;padding:20px 16px 60px;background-image:radial-gradient(circle at 15% 15%,rgba(238,77,45,.12) 0%,transparent 45%),radial-gradient(circle at 85% 85%,rgba(59,130,246,.12) 0%,transparent 45%);background-attachment:fixed;line-height:1.6}.container{width:100%;max-width:760px;margin:0 auto}.header{text-align:center;margin-bottom:28px;padding-top:20px}.header__logo{display:inline-flex;align-items:center;gap:10px;background:#ee4d2d1a;border:1px solid rgba(238,77,45,.25);padding:6px 16px;border-radius:30px;font-size:14px;font-weight:600;color:var(--primary);margin-bottom:12px;box-shadow:0 0 20px #ee4d2d26}.header__logo svg{width:18px;height:18px;fill:currentColor}.header__title{font-size:32px;font-weight:800;letter-spacing:-.02em;background:linear-gradient(135deg,#fff 30%,#cbd5e1);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:8px}.header__subtitle{color:var(--text-muted);font-size:15px}.card{background:var(--bg-card);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--bg-card-border);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-main);margin-bottom:24px;position:relative;overflow:hidden}.card:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--primary),transparent);opacity:.8}.tabs-nav{display:flex;background:#0f172a99;border-radius:var(--radius-md);padding:4px;margin-bottom:20px;border:1px solid var(--bg-card-border)}.tab-btn{flex:1;padding:10px 16px;border:none;background:transparent;color:var(--text-muted);font-family:inherit;font-size:14px;font-weight:600;border-radius:calc(var(--radius-md) - 4px);cursor:pointer;transition:var(--transition-fast)}.tab-btn:hover{color:var(--text-main)}.tab-btn.active{background:linear-gradient(135deg,var(--primary) 0%,#d83917 100%);color:#fff;box-shadow:0 4px 15px var(--primary-glow)}.form-group{margin-bottom:20px}.form-label{display:flex;justify-content:space-between;align-items:center;font-size:14px;font-weight:600;color:var(--text-main);margin-bottom:8px}.form-label .sub-info{font-size:12px;font-weight:400;color:var(--text-muted)}.input-wrapper{position:relative;display:flex;align-items:center}.input-field{width:100%;background:var(--bg-input);border:1px solid var(--bg-card-border);border-radius:var(--radius-md);padding:14px 16px;font-size:15px;color:var(--text-main);font-family:inherit;transition:var(--transition-fast);outline:none}.input-field:focus{background:var(--bg-input-focus);border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow)}.input-field::placeholder{color:var(--text-dim)}.textarea-field{resize:vertical;min-height:140px;line-height:1.6}.btn-group{display:flex;gap:12px;margin-top:24px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 24px;border-radius:var(--radius-md);font-size:15px;font-weight:600;cursor:pointer;border:none;transition:var(--transition-normal);-webkit-user-select:none;user-select:none}.btn-primary{background:linear-gradient(135deg,var(--primary) 0%,#d83917 100%);color:#fff;flex:1;box-shadow:0 8px 25px var(--primary-glow)}.btn-primary:hover{background:linear-gradient(135deg,var(--primary-hover) 0%,var(--primary) 100%);transform:translateY(-2px);box-shadow:0 12px 30px #ee4d2d66}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:#ffffff0f;border:1px solid var(--bg-card-border);color:var(--text-main)}.btn-secondary:hover{background:#ffffff1f;border-color:#fff3}.btn-sm{padding:8px 14px;font-size:13px;border-radius:var(--radius-sm)}.btn-icon-only{padding:8px;border-radius:var(--radius-sm)}.result-box{background:#0f172acc;border:1px solid rgba(16,185,129,.3);border-radius:var(--radius-md);padding:18px;margin-top:24px;display:none;animation:fadeIn .3s ease}.result-box.active{display:block}.result-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.result-title{font-size:14px;font-weight:700;color:var(--success);display:flex;align-items:center;gap:6px}.result-textarea{width:100%;background:#0006;border:1px solid var(--bg-card-border);border-radius:var(--radius-sm);padding:12px;font-family:var(--font-mono);font-size:13px;color:#38bdf8;resize:none;word-break:break-all;min-height:70px;outline:none;margin-bottom:14px}.result-actions{display:flex;gap:10px}.shortener-notice{font-size:12px;color:#94a3b8;margin-top:14px;padding-top:10px;border-top:1px dashed rgba(255,255,255,.1);line-height:1.5}.shortener-notice code{font-family:var(--font-mono);color:#38bdf8;background:#0000004d;padding:2px 6px;border-radius:4px;word-break:break-all}.info-callout{background:#3b82f614;border-left:3px solid var(--accent);border-radius:var(--radius-sm);padding:12px 16px;font-size:13px;color:#93c5fd;margin-top:20px;line-height:1.5}.info-callout strong{color:#bfdbfe}.alert-error{background:#ef44441a;border:1px solid rgba(239,68,68,.3);border-radius:var(--radius-sm);padding:12px 16px;color:#fca5a5;font-size:14px;margin-top:16px;display:none;align-items:center;gap:8px}.alert-error.active{display:flex}.history-section{margin-top:32px}.history-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.history-title{font-size:18px;font-weight:700}.history-list{display:flex;flex-direction:column;gap:12px}.history-item{background:var(--bg-card);border:1px solid var(--bg-card-border);border-radius:var(--radius-md);padding:14px 16px;display:flex;flex-direction:column;gap:8px;transition:var(--transition-fast)}.history-item:hover{border-color:#ffffff26;background:#1e293bb3}.history-item__top{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--text-muted)}.history-item__subid{background:#ee4d2d26;color:var(--primary);padding:2px 8px;border-radius:10px;font-weight:600;font-size:11px}.history-item__link{font-family:var(--font-mono);font-size:13px;color:#38bdf8;word-break:break-all}.history-item__orig{font-size:12px;color:var(--text-dim);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.history-item__actions{display:flex;gap:8px;margin-top:4px}.empty-history{text-align:center;color:var(--text-dim);padding:30px;font-size:14px;background:var(--bg-card);border:1px dashed var(--bg-card-border);border-radius:var(--radius-md)}.toast{position:fixed;bottom:24px;right:24px;background:#10b981;color:#fff;padding:12px 24px;border-radius:30px;font-weight:600;font-size:14px;box-shadow:0 10px 25px #10b98166;display:flex;align-items:center;gap:8px;transform:translateY(100px);opacity:0;transition:var(--transition-normal);z-index:9999}.toast.show{transform:translateY(0);opacity:1}.api-settings-toggle{margin-bottom:16px}.btn-api-toggle{width:100%;background:#0f172a80;border:1px solid var(--bg-card-border);border-radius:var(--radius-md);padding:12px 16px;color:var(--text-muted);font-family:inherit;font-size:13px;font-weight:500;display:flex;justify-content:space-between;align-items:center;cursor:pointer;transition:var(--transition-fast)}.btn-api-toggle:hover{background:#1e293bb3;color:var(--text-main);border-color:#ffffff26}.api-badge{font-size:11px;padding:2px 10px;border-radius:12px;font-weight:600}.api-badge.inactive{background:#64748b33;color:var(--text-dim)}.api-badge.active{background:#10b98133;color:#34d399}.api-settings-panel{background:#0f172acc;border:1px solid rgba(59,130,246,.2);border-radius:var(--radius-md);padding:18px;margin-bottom:20px;animation:fadeIn .3s ease}.api-panel-actions{display:flex;gap:10px;margin-top:10px;margin-bottom:14px}.api-hint{font-size:12px;color:#94a3b8;line-height:1.5;background:#0000004d;padding:10px 12px;border-radius:var(--radius-sm);border:1px solid var(--bg-card-border)}.api-hint a{color:#38bdf8;text-decoration:underline}.footer{text-align:center;margin-top:40px;font-size:13px;color:var(--text-dim)}.footer a{color:var(--text-muted);text-decoration:none}.footer a:hover{color:var(--primary)}@media (max-width: 640px){body{padding:12px 10px 40px}.card{padding:20px 16px;border-radius:var(--radius-md)}.header__title{font-size:24px}.btn-group,.result-actions{flex-direction:column}.toast{left:16px;right:16px;bottom:16px;justify-content:center}}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}