*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{overflow-x:hidden}

:root{
    --teal:#0D9488;--teal-dk:#0F766E;--teal-lt:#CCFBF1;--teal-bg:#F0FDFA;
    --coral:#F97316;--coral-lt:#FFF7ED;
    --bg:#FFFFFF;--surface:#F8FAFC;--surface2:#F1F5F9;
    --text:#1E293B;--text-md:#475569;--text-lt:#64748B;
    --border:#E2E8F0;--shadow-sm:0 1px 3px rgba(0,0,0,.08);
    --shadow:0 4px 24px rgba(0,0,0,.08);--shadow-lg:0 8px 40px rgba(0,0,0,.12);
    --r-sm:8px;--r-md:12px;--r-lg:16px;--r-full:9999px;
}

body{font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden}
h1,h2,h3,h4{font-family:'DM Serif Display',serif;line-height:1.3}
a{text-decoration:none;color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/*!navbar**/
.navbar{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.97);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);box-shadow:var(--shadow-sm)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;}
.logo{font-family:'DM Serif Display',serif;font-size:1.5rem;color:var(--teal);text-decoration:none}.logo span{color:var(--coral)}.logo .logo-accent{color:var(--coral)}
.nav-menu{display:flex;list-style:none;gap:8px;align-items:center}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:4px;padding:8px 12px;border-radius:var(--r-sm);color:var(--text-md);text-decoration:none;font-size:.9rem;font-weight:500;cursor:pointer;transition:all .2s;white-space:nowrap}
.nav-link:hover,.nav-item:hover>.nav-link{background:var(--teal-bg);color:var(--teal)}
.dropdown{display:none;position:absolute;top:calc(100% + 8px);left:0;background:#fff;border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--shadow-lg);min-width:200px;padding:8px;z-index:100}
.nav-item:hover .dropdown{display:block}
.dropdown.show{display:block !important}
.dropdown a{display:block;padding:8px 12px;color:var(--text-md);text-decoration:none;border-radius:var(--r-sm);font-size:.875rem;transition:all .2s}
.dropdown a:hover{background:var(--teal-bg);color:var(--teal)}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.hamburger span{display:block;width:24px;height:2px;background:var(--text);border-radius:2px}

@media(min-width:901px){.nav-item:hover .dropdown{display:block}}

@media(min-width:769px) and (max-width:900px){.nav-menu{display:flex}}

/*hero*/
.page-hero{background:linear-gradient(135deg,var(--teal) 0%,#065F46 100%);padding:48px 0 40px;color:#fff;position:relative;overflow:hidden}
.page-hero::before{content:'';position:absolute;top:-40%;right:-5%;width:400px;height:400px;background:rgba(255,255,255,.04);border-radius:50%}
.hero-content{position:relative;z-index:1}
.breadcrumb{display:flex;align-items:center;gap:6px;font-size:.8125rem;color:rgba(255,255,255,.75);margin-bottom:14px}
.breadcrumb a{color:rgba(255,255,255,.75)}
.breadcrumb a:hover{color:#fff}
.page-hero h1{font-size:clamp(1.75rem,4vw,2.75rem);color:#fff;margin-bottom:10px}
.hero-sub{font-size:1.0625rem;color:rgba(255,255,255,.88);max-width:500px}

/*Calculation Section*/
.calc-section{padding:48px 0;background:var(--surface)}
.calc-section{padding:48px 0}
.calc-grid{display:grid;grid-template-columns:420px 1fr;gap:28px;align-items:start}
.calc-grid > div{min-width:0}
.card{background:var(--bg);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:28px 32px}
.card-title{font-size:1.0625rem;font-weight:700;color:var(--text);margin-bottom:22px;padding-bottom:14px;border-bottom:1px solid var(--border);font-family:'DM Sans',sans-serif;display:flex;align-items:center;gap:8px}
.range-group{margin-bottom:18px}
.range-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.range-label{font-size:.875rem;font-weight:600;color:var(--text)}
.range-value{font-size:.875rem;font-weight:700;color:var(--teal);background:var(--teal-lt);padding:2px 10px;border-radius:var(--r-full)}
.range-ticks{display:flex;justify-content:space-between;font-size:.6875rem;color:var(--text-lt);margin-top:4px}
.form-group{margin-bottom:18px}
.form-label{display:flex;align-items:center;gap:6px;font-size:.875rem;font-weight:600;color:var(--text);margin-bottom:6px}
.form-control{width:100%;padding:11px 14px;border:1.5px solid var(--border);border-radius:var(--r-sm);font-size:.9375rem;color:var(--text);background:var(--bg);transition:border-color .2s,box-shadow .2s;outline:none;appearance:none;font-family:'DM Sans',sans-serif}
.form-control:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(13,148,136,.12)}
.tooltip-icon{width:16px;height:16px;background:var(--surface2);border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:.625rem;color:var(--text-lt);cursor:help;font-style:normal;font-weight:700}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:var(--r-sm);font-family:'DM Sans',sans-serif;font-size:.9375rem;font-weight:600;cursor:pointer;border:none;transition:all .2s}
.btn-full{width:100%}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-dk);transform:translateY(-1px);box-shadow:0 4px 16px rgba(13,148,136,.35)}
.btn-ghost{background:var(--surface);color:var(--text-lt);margin-top:10px}
.btn-ghost:hover{background:var(--surface2);color:var(--text)}
/*.btn-outline{background:#fff;color:var(--teal);border:2px solid var(--teal)}*/
/*.btn-outline:hover{background:var(--teal-bg)}*/

.results-panel{display:none}
.results-panel.show{display:block}
.result-summary{background:linear-gradient(135deg,var(--teal-bg) 0%,#EFF6FF 100%);border:1px solid var(--teal-lt);border-radius:var(--r-lg);padding:22px;margin-bottom:20px}
.result-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.result-box{background:var(--surface);border-radius:var(--r-md);padding:14px 16px;text-align:center;box-shadow:var(--shadow-sm);transition:transform .2s}
.result-box:hover{transform:translateY(-2px)}
.rb-label{font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;font-weight:600;color:var(--text-lt);margin-bottom:5px}
.rb-value{font-family:'DM Serif Display',serif;font-size:1.5rem;color:var(--teal);line-height:1.2}
.rb-value.coral{color:var(--coral)}
.rb-unit{font-size:.72rem;color:var(--text-lt);margin-top:2px}
.charts-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:18px}
.chart-card{background:#fff;border-radius:var(--r-md);padding:18px;box-shadow:var(--shadow-sm);border:1px solid var(--border)}
.cc-title{font-size:.875rem;font-weight:700;color:var(--text);margin-bottom:14px;font-family:'DM Sans',sans-serif}
.chart-container{position:relative;height:230px}
.export-row{display:flex;justify-content:flex-end;margin-top:14px}
.btn-export{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;background:var(--surface);color:var(--text-md);border:1px solid var(--border);border-radius:var(--r-sm);font-size:.8125rem;font-weight:600;cursor:pointer;transition:all .2s;font-family:'DM Sans',sans-serif}
.btn-export:hover{background:var(--teal);color:#fff;border-color:var(--teal)}
.btn-sm{padding:6px 14px;font-size:.82rem}

.breakdown-table{margin-top:18px}
.breakdown-table{width:100%;border-collapse:collapse;font-size:.875rem;margin-bottom:20px}
.breakdown-table th{background:var(--surface);padding:8px 12px;text-align:left;font-weight:600;font-size:.8rem;text-transform:uppercase;color:var(--text-lt)}
.breakdown-table td{padding:10px 12px;border-top:1px solid var(--border)}
.breakdown-table tr:hover td{background:var(--surface)}
.bt-title{font-size:.9375rem;font-weight:700;color:var(--text);margin-bottom:10px}
.table-scroll{overflow-x:auto;border-radius:var(--r-md);border:1px solid var(--border);max-width:100%}
table.data-table{width:100%;border-collapse:collapse;font-size:.8125rem;min-width:320px}
table.data-table thead th{background:var(--surface);padding:9px 12px;text-align:left;font-weight:600;color:var(--text);border-bottom:1px solid var(--border);white-space:nowrap}
table.data-table tbody td{padding:8px 12px;border-bottom:1px solid var(--border);color:var(--text)}
table.data-table tbody tr:last-child td{border-bottom:none}
table.data-table tbody tr:hover td{background:var(--surface)}

/*EMI Calculator*/
.input-group{position:relative}
.input-addon{position:absolute;top:50%;transform:translateY(-50%);font-size:.875rem;color:var(--text-lt);font-weight:600;pointer-events:none}
.input-addon-left{left:12px}
.input-group .form-control.has-left{padding-left:28px}
input[type=range]{-webkit-appearance:none;width:100%;height:6px;border-radius:3px;background:var(--border);outline:none;cursor:pointer}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:var(--teal);cursor:pointer;border:3px solid #fff;box-shadow:0 2px 6px rgba(13,148,136,.4);transition:transform .15s}
input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.15)}

/*Gst Calculator*/
.radio-group{display:flex;gap:12px;margin-bottom:18px}
.radio-opt{flex:1;display:flex;align-items:center;gap:8px;padding:10px 14px;border:1.5px solid var(--border);border-radius:var(--r-sm);cursor:pointer;transition:all .2s;font-size:.9375rem;font-weight:500}
.radio-opt:hover{border-color:var(--teal);background:var(--teal-bg)}
.radio-opt.active{border-color:var(--teal);background:var(--teal-lt);color:var(--teal-dk)}
.radio-opt input{display:none}
.gst-breakdown{margin-top:20px;background:var(--surface);border-radius:var(--r-md);padding:18px}
.gst-breakdown h4{font-size:.9375rem;font-weight:700;margin-bottom:14px;font-family:'DM Sans',sans-serif}
.gst-row{display:flex;justify-content:space-between;align-items:center;padding:8px 0;border-bottom:1px solid var(--border);font-size:.9rem}
.gst-row:last-child{border-bottom:none;font-weight:700}

/*Storage Converter*/
.context-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:16px}
.context-card{background:var(--surface);border-radius:var(--r-md);padding:14px}
.context-card .c-label{font-size:.78rem;color:var(--text-lt);margin-bottom:4px}
.context-card .c-val{font-size:1rem;font-weight:700;color:var(--teal)}

/*Sales-tax*/
.mode-toggle{display:flex;gap:0;margin-bottom:20px;border:1px solid var(--border);border-radius:var(--r-sm);overflow:hidden}
.mode-btn{flex:1;padding:10px;border:none;background:#fff;font-size:.875rem;font-weight:500;font-family:inherit;cursor:pointer;color:var(--text-lt);transition:all .2s}
.mode-btn.active{background:var(--teal);color:#fff}
.mode-btn:not(:last-child){border-right:1px solid var(--border)}
.item-row{display:flex;gap:8px;align-items:center;margin-bottom:8px}
.item-row input{flex:1;padding:8px 10px;font-size:.875rem}
.item-row .item-name{flex:2}
.item-row .item-price{flex:1}
.item-row .item-remove{padding:8px;background:none;border:none;cursor:pointer;color:var(--text-lt);font-size:1rem}
.item-row .item-remove:hover{color:var(--coral)}

/*Currency converter*/
.swap-btn{display:flex;align-items:center;justify-content:center;width:100%;padding:9px;background:var(--surface);border:1.5px solid var(--border);border-radius:var(--r-sm);font-size:1.25rem;cursor:pointer;margin:10px 0;transition:all .2s;font-family:'DM Sans',sans-serif}
.swap-btn:hover{background:var(--teal-lt);border-color:var(--teal)}
.rates-table{margin-top:18px}
.rates-table h4{font-size:.9375rem;font-weight:700;margin-bottom:10px;font-family:'DM Sans',sans-serif}
.rates-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px}
.rate-item{background:var(--surface);border-radius:var(--r-sm);padding:10px 12px;font-size:.8375rem}
.rate-item .r-code{font-weight:700;color:var(--teal)}
.rate-item .r-val{color:var(--text-lt);font-size:.8rem;margin-top:2px}

/*SI CI Interest*/
.result{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px}

/*Tax Calculator Slabs Grid*/
.tax-slabs-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:32px}
.result-highlight{background:linear-gradient(135deg,var(--teal-bg),#fff);border:1px solid var(--teal-lt);border-radius:var(--r-md);padding:20px;margin-bottom:16px;text-align:center}
.result-highlight .label{font-size:.85rem;color:var(--text-lt);margin-bottom:4px}
.result-highlight .value{font-size:2rem;font-weight:700;color:var(--teal);font-family:'DM Serif Display',serif}

/* Date*/
.card .subtitle{font-size:.9rem;color:var(--text-lt);margin-bottom:20px}
.add-result{background:var(--surface);border-radius:var(--r-md);padding:16px;margin-top:12px;display:none}
.add-result.show{display:block}
.add-result .result-date{font-size:1.3rem;font-weight:700;color:var(--teal)}
.divider{border:none;border-top:1px solid var(--border);margin:20px 0}

/* Age Calculator*/
.fun-facts{background:var(--surface);border-radius:var(--r-md);padding:16px;margin-bottom:16px}
.fun-facts h3{font-size:.9rem;font-weight:600;margin-bottom:10px;color:var(--text-md)}
.fun-fact-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.fun-fact{font-size:.85rem;color:var(--text-md);padding:8px;background:#fff;border-radius:var(--r-sm);border:1px solid var(--border)}
.fun-fact span{font-weight:600;color:var(--teal)}

/*CPM Calculator*/
.cpm-mode-tabs{display:flex;gap:4px;margin-bottom:20px;background:var(--surface);border-radius:var(--r-sm);padding:4px}
.cpm-mode-tab{flex:1;padding:8px 4px;border:none;background:none;border-radius:var(--r-sm);font-size:.82rem;font-weight:500;font-family:inherit;cursor:pointer;color:var(--text-lt);transition:all .2s;text-align:center}
.cpm-mode-tab.active{background:#fff;color:var(--teal);box-shadow:var(--shadow-sm)}
.tab-panel{display:none}
.tab-panel.active{display:block}
.input-prefix{position:absolute;top:50%;transform:translateY(-50%);left:12px;font-size:.85rem;color:var(--text-lt);pointer-events:none}
.input-group input{padding-left:26px}

/*Percent Calculator*/
.calc-section{padding:48px 0}
.calc-panel{display:none}.calc-panel.active{display:block}
.calc-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:1.1rem;font-weight:500;color:var(--text-md);margin-bottom:20px}
.calc-row input{width:100px;padding:10px;border:1px solid var(--border);border-radius:var(--r-sm);font-size:1.1rem;font-family:'DM Sans',sans-serif;text-align:center;color:var(--text)}
.calc-row input:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 3px rgba(13,148,136,.1)}
.mode-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:32px}
.mode-tab{padding:10px 18px;border-radius:var(--r-full);border:2px solid var(--border);background:#fff;font-family:'DM Sans',sans-serif;font-size:.9rem;font-weight:500;cursor:pointer;transition:all .2s;color:var(--text-md)}
.mode-tab.active{background:var(--teal);color:#fff;border-color:var(--teal)}
.mode-tab:hover:not(.active){border-color:var(--teal);color:var(--teal)}
.btn-row{display:flex;gap:12px;margin-top:24px}

/*BMI Calculator*/
.unit-toggle{display:flex;gap:0;margin-bottom:20px;border:1px solid var(--border);border-radius:var(--r-sm);overflow:hidden}
.unit-btn{flex:1;padding:10px;border:none;background:#fff;font-family:'DM Sans',sans-serif;font-size:.9rem;font-weight:500;cursor:pointer;transition:all .2s;color:var(--text-md)}
.unit-btn.active{background:var(--teal);color:#fff}
.bmi-scale{margin:16px 0;padding:12px;background:var(--surface);border-radius:var(--r-md)}
.bmi-scale-bar{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;height:20px;border-radius:var(--r-sm);overflow:hidden;margin:8px 0}
.bmi-seg{display:flex;align-items:center;justify-content:center;font-size:.65rem;font-weight:700;color:#fff}
.bmi-labels{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;margin-bottom:4px}
.bmi-labels span{font-size:.7rem;color:var(--text-lt);text-align:center}

/*Bandwidth*/
.s-sub{font-size:.78rem;color:var(--text-lt);margin-top:2px}

/* Conversion boxes */
.conv-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:14px 16px;margin-bottom:12px;cursor:pointer;transition:all .2s}
.conv-box:hover{background:var(--teal-bg);border-color:var(--teal-lt)}
.conv-box-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:4px}
.conv-box-label{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text-lt)}
.conv-box-base{font-size:.72rem;background:var(--surface2);padding:2px 8px;border-radius:var(--r-full);color:var(--text-lt)}
.conv-box-value{font-family:'Courier New',monospace;font-size:1.05rem;font-weight:700;color:var(--text);word-break:break-all;line-height:1.5}
.conv-box-value.highlight{color:var(--teal)}
.copy-hint{font-size:.72rem;color:var(--text-lt);margin-top:4px}
/* Bit display */
.bit-display{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:16px}
.bit-group{display:flex;gap:2px}
.bit-cell{width:24px;height:24px;display:flex;align-items:center;justify-content:center;border-radius:4px;font-family:'Courier New',monospace;font-size:.75rem;font-weight:700;border:1px solid var(--border)}
.bit-cell.one{background:var(--teal);color:#fff;border-color:var(--teal)}
.bit-cell.zero{background:var(--surface);color:var(--text-lt)}
/* Bitwise section */
.bitwise-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:12px}
.bitwise-result{background:var(--teal-bg);border:1px solid var(--teal-lt);border-radius:var(--r-md);padding:12px;text-align:center}
.bitwise-result .op{font-size:.75rem;color:var(--teal-dk);font-weight:700;margin-bottom:4px}
.bitwise-result .val{font-family:'Courier New',monospace;font-size:1rem;font-weight:700;color:var(--text);word-break:break-all;overflow-wrap:break-word}
/* ASCII table */
.ascii-row{display:flex;align-items:center;padding:6px 10px;border-bottom:1px solid var(--border);font-size:.85rem}
.ascii-row:last-child{border-bottom:none}
.ascii-char{width:40px;font-weight:700;font-family:'Courier New',monospace;font-size:1rem}
.ascii-dec{width:40px;color:var(--text-lt)}
.ascii-hex{width:50px;color:var(--teal);font-family:'Courier New',monospace}
.ascii-bin{color:var(--text-lt);font-family:'Courier New',monospace;font-size:.8rem}

/* AI-TOKEN Calculator*/
.form-group textarea{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--r-sm);font-size:1rem;font-family:'DM Sans',sans-serif;color:var(--text);background:#fff;transition:border-color .2s}
.form-group textarea{resize:vertical;min-height:80px}
.form-group textarea:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 3px rgba(13,148,136,.1)}
.range-wrap{display:flex;align-items:center;gap:12px;margin-top:6px}
.range-wrap input[type=range]{flex:1;accent-color:var(--teal)}
.range-val{font-size:.85rem;font-weight:600;color:var(--teal);min-width:70px;text-align:right}
.model-comparison{margin-bottom:19px}
.model-comparison h3{font-size:.9rem;padding:10px 14px;font-weight:600;margin-bottom:10px;color:var(--text-md)}
.model-row{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;border-radius:var(--r-sm);margin-bottom:6px;background:var(--surface)}
.model-row.selected{background:var(--teal-bg);border:1px solid var(--teal-lt)}
.model-row .model-name{font-size:.85rem;font-weight:500}
.model-row .model-cost{font-weight:600;color:var(--teal);font-size:.9rem}
.disclaimer{font-size:.78rem;color:var(--text-lt);margin-top:10px;font-style:italic}

/*API Cost Calculator*/
.cost-breakdown{margin-bottom:16px}
.cost-row{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid var(--border)}
.cost-row:last-child{border-bottom:none;font-weight:600;font-size:1rem}
.cost-row .item{font-size:.9rem;color:var(--text-md)}
.cost-row .amount{font-weight:600;color:var(--teal)}

/*bandwidth calculator*/
.row-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.ch-main{flex:1;padding:1.1rem 1.25rem 1rem;}
.ch{display:flex;align-items:stretch;}
.ch-top{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:.9rem;}
.ch-title{font-size:15px;font-weight:700;color:var(--text);}
.ch-speed{font-size:11px;font-weight:600;color:var(--teal-dk);background:var(--teal-bg);border:1px solid var(--teal-lt);padding:3px 9px;border-radius:var(--r-full);}
.time-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;}
.tg-item{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:10px 12px;transition:border-color .15s,background .15s;cursor:default;}
.tg-item:hover{background:var(--teal-bg);border-color:var(--teal-lt);}
.tg-icon{width:32px;height:32px;border-radius:var(--r-sm);background:var(--teal-lt);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.tg-icon i{font-size:15px;color:var(--teal-dk);}
.tg-body{flex:1;min-width:0;}
.tg-label{font-size:10px;font-weight:500;letter-spacing:.04em;text-transform:uppercase;color:var(--text-lt);margin-bottom:3px;}
.tg-row{display:flex;align-items:baseline;gap:4px;}
.tg-value{font-size:18px;font-weight:700;color:var(--text);letter-spacing:-.02em;line-height:1;}
.tg-unit{font-size:11px;font-weight:600;color:var(--text-lt);}
.tg-track{height:3px;background:var(--border);border-radius:var(--r-full);margin-top:5px;overflow:hidden;}
.tg-fill{height:100%;background:linear-gradient(90deg,var(--teal),var(--teal-dk));border-radius:var(--r-full);width:0;transition:width .7s cubic-bezier(.4,0,.2,1);}
.tg-item:nth-child(5),.tg-item:nth-child(6){border-color:var(--teal-lt);background:var(--teal-bg);}
.tg-item:nth-child(5) .tg-icon,.tg-item:nth-child(6) .tg-icon{background:var(--teal);}
.tg-item:nth-child(5) .tg-icon i,.tg-item:nth-child(6) .tg-icon i{color:#fff;}
.tg-item:nth-child(5) .tg-value,.tg-item:nth-child(6) .tg-value{color:var(--teal-dk);}
.tg-item:nth-child(5) .tg-fill,.tg-item:nth-child(6) .tg-fill{background:var(--teal-dk);}

/*bmr calculator*/
.tdee-grid {border: 1px solid var(--border);border-radius: var(--r-md);overflow: hidden;background: var(--bg);}
.tdee-grid > div {display: grid;grid-template-columns: 1fr auto;align-items: center;border-bottom: 1px solid var(--border);transition: background 0.15s;}
.tdee-grid > div:last-child {border-bottom: none;}
.tdee-grid > div:not(.active):hover {background: var(--surface);}
.tdee-grid > div > span:first-child {padding: 10px 14px;font-size: 0.84rem;color: var(--text-md);}
.tdee-grid > div > span:last-child {padding: 10px 14px;font-size: 0.84rem;font-weight: 600;color: var(--text);white-space: nowrap;letter-spacing: -0.01em;}
.tdee-grid > div.active {background: var(--teal-bg);}
.tdee-grid > div.active > span:first-child {color: var(--teal-dk);font-weight: 500;}
.tdee-grid > div.active > span:last-child {color: var(--teal-dk);}

/*calorie- Calculator*/
.macro-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:16px}
.macro-box{border-radius:var(--r-md);padding:16px;text-align:center}
.macro-box .label{font-size:.75rem;color:rgba(255,255,255,.8);margin-bottom:4px}
.macro-box .value{font-size:1.2rem;font-weight:700;color:#fff}
.macro-box .sub{font-size:.75rem;color:rgba(255,255,255,.7)}

/*Water Intake*/
.water-icon{font-size:2rem}
.schedule{margin-bottom:16px; padding: 16px;}
.schedule h3{font-size:.95rem;font-weight:600;margin-bottom:10px;color:var(--text-md)}
.schedule-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.time-slot{background:var(--teal-bg);border:1px solid var(--teal-lt);border-radius:var(--r-sm);padding:10px;text-align:center;font-size:.8rem}
.time-slot .time{font-weight:600;color:var(--teal)}
.time-slot .amount{color:var(--text-md)}

/*ideal weight*/
.formula-results{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:16px}
.formula-box{background:var(--surface);border-radius:var(--r-md);padding:16px}
.formula-box .name{font-size:.8rem;color:var(--text-lt);margin-bottom:4px}
.formula-box .weight{font-size:1.3rem;font-weight:700;color:var(--text)}
.formula-box .range{font-size:.8rem;color:var(--text-md);margin-top:2px}

/* Formula Section */
.info-section{padding:56px 0;background:#fff}
.info-section-alt{background:var(--surface)}
.section-badge{display:inline-block;background:var(--teal-lt);color:var(--teal-dk);padding:4px 12px;border-radius:var(--r-full);font-size:.8125rem;font-weight:700;margin-bottom:12px}
.section-title{font-size:1.75rem;margin-bottom:10px}
.section-sub{color:var(--text-lt);font-size:1rem;margin-bottom:32px}
.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.info-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--r-md);padding:22px;transition:box-shadow .2s,transform .2s}
.info-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.info-card .ic-icon{font-size:1.75rem;margin-bottom:12px;display:block}
.info-card h4{font-size:.9375rem;font-weight:700;margin-bottom:7px;font-family:'DM Sans',sans-serif}
.info-card p,.info-card li{font-size:.875rem;color:var(--text-lt);line-height:1.65}
.info-card ul{padding-left:16px;list-style:disc}
.info-card ul li{margin-bottom:3px}
.formula-box{background:var(--surface2);border-left:4px solid var(--teal);border-radius:0 var(--r-md) var(--r-md) 0;padding:18px 22px;font-family:'Courier New',monospace;font-size:.9rem;color:var(--text);margin:18px 0;line-height:1.7}
.formula-box .f-title{font-family:'DM Sans',sans-serif;font-size:.75rem;font-weight:700;color:var(--teal);text-transform:uppercase;letter-spacing:.06em;margin-bottom:7px}
@media print{.navbar,.footer,.btn-group,.export-row,details,.related-grid{display:none!important}.results-panel.show{display:block!important}}

/*FAQ Section*/
.faq-list{display:flex;flex-direction:column;gap:10px}
details.faq-item{border:1px solid var(--border);border-radius:var(--r-md);overflow:hidden}
details.faq-item summary{padding:16px 18px;font-weight:600;font-size:.9375rem;color:var(--text);cursor:pointer;display:flex;justify-content:space-between;align-items:center;list-style:none;background:var(--bg);transition:background .2s;user-select:none}
details.faq-item summary::-webkit-details-marker{display:none}
details.faq-item summary::after{content:'+';font-size:1.25rem;color:var(--teal)}
details.faq-item[open] summary::after{content:'−'}
details.faq-item[open] summary{background:var(--teal-bg);color:var(--teal-dk)}
.faq-answer{padding:14px 18px;font-size:.9rem;color:var(--text-lt);line-height:1.7;background:var(--bg);border-top:1px solid var(--border)}


/*related calculator*/
.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.related-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--r-md);padding:18px;transition:all .2s;text-align:center}
.related-card:hover{border-color:var(--teal);box-shadow:var(--shadow);transform:translateY(-2px)}
.rc-icon{font-size:1.75rem;display:block;margin:0 auto 8px}
.rc-name{font-size:.875rem;font-weight:700;color:var(--text);margin-bottom:3px;display:block}
.rc-desc{font-size:.8rem;color:var(--text-lt);display:block;margin-bottom:8px}
.rc-link{font-size:.8rem;color:var(--teal);font-weight:700;display:inline-flex;align-items:center;gap:3px}

/*footer*/
.footer{background:#1E293B;color:#94A3B8;padding:52px 0 22px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;margin-bottom:44px}
.footer .logo{color:#fff;display:block;margin-bottom:12px}
.footer-desc{font-size:.875rem;line-height:1.75;max-width:260px}
.footer-col h4{font-size:.72rem;font-weight:700;color:#fff;text-transform:uppercase;letter-spacing:.1em;margin-bottom:12px;font-family:'DM Sans',sans-serif}
.footer-links{display:flex;flex-direction:column;gap:7px}
.footer-links a{font-size:.875rem;color:#94A3B8;transition:color .2s}
.footer-links a:hover{color:var(--teal-lt)}
.footer-bottom{border-top:1px solid #334155;padding-top:22px;display:flex;justify-content:space-between;align-items:center;font-size:.8125rem;flex-wrap:wrap;gap:8px}

@media(max-width:768px){
    .related-grid{grid-template-columns:repeat(2,1fr)}
    .result-grid{grid-template-columns:repeat(3,1fr)}
    .result-box{padding:10px 8px}
    .rb-value{font-size:1.15rem}
    .charts-grid{grid-template-columns:1fr}
    .hamburger{display:flex}
    .nav-menu{display:none}
    .nav-menu.is-open{
        display:flex;
        flex-direction:column;
        position:fixed;
        top:64px;left:0;right:0;
        background:#fff;
        padding:16px;
        border-bottom:1px solid var(--border);
        box-shadow:var(--shadow);
        z-index:999;
        max-height:calc(100vh - 64px);
        overflow-y:auto}
    .nav-menu.is-open .dropdown,.dropdown.show{display:block;position:static;box-shadow:none;border:none;background:var(--surface)}
}

@media(max-width:640px){
    .footer-grid{grid-template-columns:1fr}
    .footer-bottom{flex-direction:column;text-align:center}
    .result-grid{grid-template-columns:repeat(3,1fr)}
    .formula-results{grid-template-columns:1fr}
    .platform-grid{grid-template-columns:repeat(2,1fr)}
    .card{padding:20px 18px}
    .result-summary{padding:14px}
    .tax-slabs-grid{grid-template-columns:1fr}
    .result{grid-template-columns:1fr 1fr}
    .bitwise-grid{grid-template-columns:1fr}
}

@media(max-width:900px){
    .calc-grid{grid-template-columns:1fr}
    .nav-menu{display:none}
    .hamburger{display:flex}
    .platform-grid{grid-template-columns:repeat(2,1fr)}
    .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
}

@media(max-width:480px){
    .footer-grid{grid-template-columns:1fr}
    .row-2{grid-template-columns:1fr}
    .card{padding:18px 14px}
    .result-summary{padding:12px}
    .result-grid{grid-template-columns:repeat(3,1fr);gap:8px}
    .result-box{padding:10px 6px}
    .rb-value{font-size:1rem;word-break:break-word}
    .rb-label{font-size:.65rem}
    .rb-unit{font-size:.65rem}
    .chart-container{height:200px}
    .chart-card{padding:12px}
    table.data-table thead th{padding:7px 8px;font-size:.72rem}
    table.data-table tbody td{padding:6px 8px;font-size:.72rem}
    .bt-title{font-size:.875rem}
    .charts-grid{gap:12px}
    .bitwise-result{padding:10px 8px}
    .bitwise-result .val{font-size:.8rem}
}

@media(max-width:400px){
    .card{padding:16px 12px}
    .result-summary{padding:10px}
    .result-grid{gap:6px}
    .result-box{padding:8px 4px}
    .rb-value{font-size:0.875rem}
    table.data-table thead th{padding:6px 6px;font-size:.68rem}
    table.data-table tbody td{padding:5px 6px;font-size:.68rem}
}