:root{--bg: #f0f9ff;--bg-secondary: #e0f2fe;--card-bg: #ffffff;--card-border: #bae6fd;--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--accent: #0ea5e9;--accent-dark: #0284c7;--accent-light: #e0f2fe;--teal: #14b8a6;--teal-light: #ccfbf1;--danger: #ef4444;--danger-light: #fee2e2;--success: #22c55e;--success-light:#dcfce7;--warning: #f59e0b;--warning-light:#fef3c7;--shadow: 0 4px 24px rgba(14,165,233,.1);--shadow-hover: 0 8px 32px rgba(14,165,233,.18);--radius: 16px;--radius-sm: 10px}:root.dark{--bg: #0f172a;--bg-secondary: #1e293b;--card-bg: #1e293b;--card-border: #334155;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--accent: #38bdf8;--accent-dark: #0ea5e9;--accent-light: #1e3a4f;--teal: #2dd4bf;--teal-light: #1a3a37;--danger-light: rgba(239,68,68,.12);--success-light:rgba(34,197,94,.12);--warning-light:rgba(245,158,11,.12);--shadow: 0 4px 24px rgba(0,0,0,.3);--shadow-hover: 0 8px 32px rgba(0,0,0,.4)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}button{color:inherit;font-family:inherit}html{scroll-behavior:smooth}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text-primary);transition:background .3s,color .3s;line-height:1.5;min-height:100vh}.app{min-height:100vh;display:flex;flex-direction:column}.app-header{position:sticky;top:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:14px 20px;background:var(--card-bg);border-bottom:1px solid var(--card-border);box-shadow:0 2px 8px #0000000f;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.header-left{display:flex;align-items:center;gap:10px}.app-logo{font-size:1.4rem}.app-title{font-size:1.25rem;font-weight:800;background:linear-gradient(135deg,var(--accent),var(--teal));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.02em}.theme-toggle{width:40px;height:40px;border-radius:50%;border:1.5px solid var(--card-border);background:var(--bg-secondary);font-size:1.1rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .2s,border-color .2s}.theme-toggle:hover{transform:rotate(25deg) scale(1.1);border-color:var(--accent)}.page-layout{max-width:700px;width:100%;margin:0 auto}.app-main{width:100%;padding:24px 16px 32px;display:flex;flex-direction:column;gap:18px}.ad-bottom-wrap{max-width:1060px;margin:0 auto;padding:0 16px 16px}.ad-bottom-unit{width:100%;min-height:90px}.filter-bar{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;padding-bottom:2px}.filter-bar::-webkit-scrollbar{display:none}.filter-chip{flex-shrink:0;padding:5px 13px;border-radius:999px;border:1.5px solid var(--card-border);background:var(--card-bg);color:var(--text-secondary);font-size:.72rem;font-weight:600;cursor:pointer;white-space:nowrap;transition:all .15s;letter-spacing:.02em}.filter-chip:hover{border-color:var(--accent);color:var(--accent)}.filter-chip.active{background:var(--accent);border-color:var(--accent);color:#fff}.category-tabs{display:flex;flex-wrap:wrap;gap:6px}.cat-tab{flex:1 1 70px;display:flex;flex-direction:column;align-items:center;gap:4px;padding:9px 10px;border:1.5px solid var(--card-border);border-radius:var(--radius-sm);background:var(--card-bg);color:var(--text-secondary);cursor:grab;-webkit-user-select:none;user-select:none;transition:all .2s;font-size:.8rem;font-weight:500;min-width:60px;max-width:120px}.cat-tab:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-light)}.cat-tab.active{border-color:transparent;background:linear-gradient(135deg,var(--accent),var(--teal));color:#fff;box-shadow:0 4px 12px #0ea5e94d}.cat-label{font-size:.65rem;letter-spacing:.02em;line-height:1}.converter-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);transition:box-shadow .3s}.converter-card:hover{box-shadow:var(--shadow-hover)}.converter-grid{display:grid;grid-template-columns:1fr 52px 1fr;gap:10px;align-items:end;margin-bottom:18px}.converter-side{display:flex;flex-direction:column;gap:8px}.side-label{font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted)}.value-input{width:100%;padding:13px 12px;font-size:1.5rem;font-weight:700;border:2px solid var(--card-border);border-radius:var(--radius-sm);background:var(--bg);color:var(--text-primary);outline:none;transition:border-color .2s,box-shadow .2s;-moz-appearance:textfield}.value-input::-webkit-inner-spin-button,.value-input::-webkit-outer-spin-button{-webkit-appearance:none}.value-input::placeholder{color:var(--text-muted);font-weight:400;font-size:1rem}.value-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #0ea5e926}.result-display{min-height:58px;padding:13px 12px;border:2px solid var(--teal);border-radius:var(--radius-sm);background:linear-gradient(135deg,#14b8a612,#0ea5e912);display:flex;align-items:center;overflow:hidden}.result-value{font-size:1.5rem;font-weight:700;color:var(--teal);word-break:break-all}.result-placeholder{font-size:1.5rem;color:var(--text-muted)}.unit-select{width:100%;padding:9px 32px 9px 11px;border:1.5px solid var(--card-border);border-radius:var(--radius-sm);background:var(--bg);color:var(--text-primary);font-size:.875rem;cursor:pointer;outline:none;transition:border-color .2s;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2.5'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 9px center}.unit-select:focus{border-color:var(--accent)}.swap-area{display:flex;align-items:center;justify-content:center;padding-bottom:36px}.swap-btn{width:42px;height:42px;border-radius:50%;border:2px solid var(--accent);background:var(--accent-light);color:var(--accent);font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .25s;flex-shrink:0}.swap-btn:hover{background:var(--accent);color:#fff;transform:rotate(180deg) scale(1.1);border-color:var(--accent-dark)}.formula-row{display:flex;align-items:center;gap:8px;padding:9px 13px;background:var(--bg-secondary);border-radius:var(--radius-sm);margin-bottom:14px}.formula-icon{font-size:.95rem;font-weight:700;font-style:italic;color:var(--accent);flex-shrink:0;width:18px}.formula-text{font-size:.82rem;color:var(--text-secondary);font-family:Courier New,monospace}.action-row{display:flex;gap:8px;flex-wrap:wrap}.action-btn{display:flex;align-items:center;gap:5px;padding:9px 14px;border-radius:var(--radius-sm);font-size:.85rem;font-weight:600;cursor:pointer;transition:all .2s;border:1.5px solid transparent;white-space:nowrap}.swap-action{background:var(--accent-light);color:var(--accent);border-color:var(--accent)}.swap-action:hover{background:var(--accent);color:#fff}.clear-btn{background:var(--danger-light);color:var(--danger);border-color:#ef444473}.clear-btn:hover{background:var(--danger);color:#fff;border-color:var(--danger)}.copy-btn{flex:1;justify-content:center;background:var(--success-light);color:var(--success);border-color:#22c55e73}.copy-btn:hover:not(:disabled){background:var(--success);color:#fff;border-color:var(--success)}.copy-btn:disabled{opacity:.45;cursor:not-allowed}.copy-btn.copied{background:var(--success);color:#fff;border-color:var(--success)}.fav-btn{background:var(--bg-secondary);color:var(--warning);border-color:var(--card-border);font-size:1.1rem;padding:9px 13px}.fav-btn:hover{border-color:var(--warning)}.fav-btn.favorited{background:var(--warning-light);border-color:var(--warning)}.section-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius);padding:16px 20px;box-shadow:var(--shadow)}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.section-title{font-size:.9rem;font-weight:700}.text-btn{background:none;border:none;color:var(--text-muted);font-size:.78rem;cursor:pointer;padding:2px 6px;border-radius:4px;transition:color .2s}.text-btn:hover{color:var(--danger)}.favorites-list{display:flex;flex-wrap:wrap;gap:8px}.fav-chip{display:flex;align-items:center;gap:5px;padding:5px 14px;border:1.5px solid var(--card-border);border-radius:999px;background:var(--bg);color:var(--text-secondary);font-size:.82rem;font-weight:600;cursor:pointer;transition:all .2s}.fav-chip:hover,.fav-chip.active{border-color:var(--accent);color:var(--accent);background:var(--accent-light)}.history-list{display:flex;flex-direction:column;gap:6px}.history-item{display:flex;align-items:center;gap:8px;width:100%;padding:10px 12px;border:1px solid var(--card-border);border-radius:var(--radius-sm);background:var(--bg);color:var(--text-primary);cursor:pointer;transition:all .2s;text-align:left;font-size:.875rem}.history-item:hover{border-color:var(--accent);background:var(--accent-light)}.hist-icon{font-size:.95rem;flex-shrink:0;color:var(--text-muted)}.hist-from{color:var(--text-primary);font-weight:600}.hist-arrow{color:var(--text-muted);flex-shrink:0;margin:0 2px}.hist-to{color:var(--teal);font-weight:700;margin-left:auto}.app-header{flex-direction:column!important;align-items:stretch!important;gap:8px;padding-bottom:10px!important}.header-top{display:flex;align-items:center;justify-content:space-between}.header-right{display:flex;align-items:center;gap:10px}.lang-row{display:flex;align-items:center}.lang-dropdown{position:relative}.lang-trigger{display:flex;align-items:center;gap:5px;padding:5px 10px;border-radius:8px;border:1.5px solid var(--card-border);background:var(--bg-secondary);color:var(--text-primary);font-size:.8rem;font-weight:700;cursor:pointer;transition:all .15s;white-space:nowrap;min-width:80px}.lang-trigger:hover{border-color:var(--accent);color:var(--accent)}.lang-flag{font-size:1rem}.lang-code{font-size:.78rem;font-weight:800;letter-spacing:.02em}.lang-chevron{font-size:.65rem;color:var(--text-muted);margin-left:auto;transition:transform .2s}.lang-chevron.open{transform:rotate(180deg)}.lang-menu{position:absolute;top:calc(100% + 6px);right:0;left:auto;z-index:500;background:var(--card-bg);border:1.5px solid var(--card-border);border-radius:10px;box-shadow:0 8px 24px #00000026;overflow:hidden;min-width:170px;animation:dropIn .15s ease}@keyframes dropIn{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.lang-option{display:flex;align-items:center;gap:8px;width:100%;padding:9px 12px;border:none;background:none;color:var(--text-secondary);font-size:.85rem;font-weight:500;cursor:pointer;text-align:left;transition:background .15s}.lang-option:hover{background:var(--bg-secondary);color:var(--text-primary)}.lang-option.active{background:var(--accent-light);color:var(--accent);font-weight:700}.lang-name{flex:1}.lang-code-sm{font-size:.7rem;font-weight:800;color:var(--text-muted)}.lang-option.active .lang-code-sm{color:var(--accent)}.lang-check{font-size:.75rem;color:var(--accent);margin-left:auto}.uses-badge{font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:999px;background:var(--warning-light);color:var(--warning);border:1px solid rgba(245,158,11,.35);white-space:nowrap}.cooldown-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:999;background:#000000a6;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;padding:20px;animation:fadeIn .25s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.cooldown-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius);padding:32px 28px 28px;max-width:360px;width:100%;text-align:center;box-shadow:0 24px 64px #0000004d;animation:slideUp .3s ease}@keyframes slideUp{0%{transform:translateY(24px);opacity:0}to{transform:translateY(0);opacity:1}}.cooldown-icon{font-size:3rem;margin-bottom:10px}.cooldown-title{font-size:1.4rem;font-weight:800;color:var(--text-primary);margin-bottom:8px}.cooldown-desc{font-size:.9rem;color:var(--text-secondary);line-height:1.6;margin-bottom:20px}.cooldown-timer{font-size:3.5rem;font-weight:900;color:var(--accent);line-height:1;margin-bottom:14px;font-variant-numeric:tabular-nums}.cooldown-bar-track{height:8px;background:var(--bg-secondary);border-radius:999px;overflow:hidden;margin-bottom:10px}.cooldown-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--teal));border-radius:999px;transition:width .25s linear}.cooldown-sub{font-size:.8rem;color:var(--text-muted);margin-bottom:0}.cooldown-btn{display:inline-flex;align-items:center;gap:8px;margin-top:20px;padding:13px 28px;border-radius:var(--radius-sm);border:none;background:linear-gradient(135deg,var(--accent),var(--teal));color:#fff;font-size:1rem;font-weight:700;cursor:pointer;box-shadow:0 4px 14px #0ea5e966;transition:transform .15s,box-shadow .15s;width:100%;justify-content:center;animation:pulse .6s ease infinite alternate}@keyframes pulse{0%{box-shadow:0 4px 14px #0ea5e94d}to{box-shadow:0 6px 20px #0ea5e98c}}.cooldown-btn:hover{transform:translateY(-2px)}.cat-tab{cursor:grab;-webkit-user-select:none;user-select:none}.cat-tab:active{cursor:grabbing}.cat-tab.dragging{opacity:.3;transform:scale(.95)}.favorites-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.fav-card{display:flex;border:1.5px solid var(--card-border);border-radius:var(--radius-sm);overflow:hidden;transition:border-color .2s,box-shadow .2s}.fav-card:hover{border-color:var(--accent);box-shadow:0 2px 10px #0ea5e91f}.fav-card-main{flex:1;display:flex;align-items:center;gap:10px;padding:12px 10px;background:var(--bg);color:var(--text-secondary);cursor:pointer;text-align:left;transition:background .2s,color .2s;min-width:0}.fav-card-main:hover{background:var(--accent-light);color:var(--accent)}.fav-card-icon{font-size:1.4rem;flex-shrink:0}.fav-card-info{display:flex;flex-direction:column;gap:2px;min-width:0}.fav-card-cat{font-size:.65rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted)}.fav-card-units{font-size:.9rem;font-weight:700;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.fav-card-del{width:34px;flex-shrink:0;background:var(--danger-light);border:none;border-left:1px solid var(--card-border);color:var(--danger);font-size:1.1rem;cursor:pointer;transition:background .2s,color .2s;display:flex;align-items:center;justify-content:center}.fav-card-del:hover{background:var(--danger);color:#fff}.favorites-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:180px;gap:12px}.empty-icon{font-size:3rem;opacity:.5}.empty-text{color:var(--text-muted);text-align:center;font-size:.9rem;line-height:1.6;max-width:260px}.ad-placeholder{display:flex;align-items:center;justify-content:center;background:var(--bg-secondary);border:1px dashed var(--card-border);border-radius:var(--radius-sm);color:var(--text-muted);font-size:.72rem;font-weight:500;letter-spacing:.05em;text-transform:uppercase}.ad-leaderboard{min-height:50px;max-height:100px;overflow:hidden;width:100%}.ad-rectangle{min-height:60px;max-height:280px;overflow:hidden;width:100%}.ad-cooldown{min-height:80px;width:100%;margin-bottom:16px;border-radius:var(--radius-sm)}.donate-card{display:flex;flex-direction:column;gap:14px}.donate-desc{font-size:.875rem;color:var(--text-secondary);line-height:1.5}.donate-buttons{display:flex;gap:10px;flex-wrap:wrap}.donate-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 18px;border-radius:var(--radius-sm);font-size:.875rem;font-weight:700;text-decoration:none;transition:all .2s;border:2px solid transparent}.kofi-btn{background:#ff5e5b;color:#fff;border-color:#ff5e5b}.kofi-btn:hover{background:#e54d4a;transform:translateY(-2px);box-shadow:0 4px 12px #ff5e5b59}.bmc-btn{background:#fd0;color:#000;border-color:#fd0}.bmc-btn:hover{background:#f0ce00;transform:translateY(-2px);box-shadow:0 4px 12px #ffdd0059}.promptpay-box{padding:14px;background:var(--bg-secondary);border-radius:var(--radius-sm);border:1px solid var(--card-border)}.promptpay-label{font-size:.8rem;font-weight:700;color:var(--text-secondary);margin-bottom:10px}.promptpay-qr-wrap{display:flex;align-items:center;gap:16px}.promptpay-qr-placeholder{width:80px;height:80px;border:2px dashed var(--card-border);border-radius:8px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;flex-shrink:0;color:var(--text-muted)}.promptpay-qr-placeholder span{font-size:1.5rem}.promptpay-qr-placeholder small{font-size:.55rem;text-align:center;line-height:1.3}.promptpay-info{display:flex;flex-direction:column;gap:4px}.promptpay-number{font-size:1.1rem;font-weight:800;color:var(--text-primary);letter-spacing:.05em}.promptpay-hint{font-size:.75rem;color:var(--text-muted)}.app-footer{padding:14px;text-align:center;color:var(--text-muted);font-size:.78rem;border-top:1px solid var(--card-border);background:var(--card-bg);display:flex;align-items:center;justify-content:center;gap:6px;flex-wrap:wrap}.footer-sep{opacity:.4}.footer-link{color:var(--accent);text-decoration:none}.footer-link:hover{text-decoration:underline}@media (max-width: 900px){.page-layout{flex-direction:column}.app-main{max-width:100%}.ad-sidebar{display:none}}@media (max-width: 520px){.app-main{padding:16px 10px 28px;gap:14px}.converter-card{padding:16px 14px}.app-title{font-size:1.05rem}.cat-tab{padding:8px 10px}.favorites-grid,.converter-grid{grid-template-columns:1fr}.swap-area{padding-bottom:0;justify-content:center}.swap-btn{transform:rotate(90deg)}.swap-btn:hover{transform:rotate(90deg) scale(1.15);background:var(--accent);color:#fff}.value-input,.result-value{font-size:1.3rem}.action-btn{padding:8px 11px;font-size:.8rem}}@media (max-width: 360px){.action-row{gap:5px}.action-btn{padding:7px 9px}.swap-action span:last-child{display:none}.clear-btn span:last-child{display:none}}