:root{
    /* Dark Mode (default) */
    --bg:#0A0A0F;
    --surface:#18181B;
    --elevated:#27272A;
    --accent:#6366F1;
    --accent-hover:#818CF8;
    --accent-soft:rgba(99,102,241,0.15);
    --success:#10B981;
    --warning:#F59E0B;
    --error:#EF4444;
    --text:#FAFAFA;
    --text-secondary:#A1A1AA;
    --muted:#71717A;
    --border:#27272A;
    --shadow:0 20px 40px rgba(0,0,0,.4);
    --gradient-text:linear-gradient(180deg,#fff,#A1A1AA);
    --dropzone-bg:rgba(99,102,241,.05);
}

[data-theme="light"]{
    --bg:#FAFAFA;
    --surface:#FFFFFF;
    --elevated:#F4F4F5;
    --accent:#6366F1;
    --accent-hover:#4F46E5;
    --accent-soft:rgba(99,102,241,0.1);
    --success:#059669;
    --warning:#D97706;
    --error:#DC2626;
    --text:#18181B;
    --text-secondary:#52525B;
    --muted:#A1A1AA;
    --border:#E4E4E7;
    --shadow:0 20px 40px rgba(0,0,0,.1);
    --gradient-text:linear-gradient(180deg,#18181B,#52525B);
    --dropzone-bg:rgba(99,102,241,.03);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Inter',-apple-system,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased;transition:background-color 0.3s,color 0.3s}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* Navbar */
.navbar{position:fixed;top:0;left:0;right:0;z-index:100;background:var(--bg);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);transition:background-color 0.3s,border-color 0.3s}
.navbar-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text)}
.brand-icon{width:32px;height:32px;background:linear-gradient(135deg,var(--accent),var(--accent-hover));border-radius:8px;position:relative}
.brand-icon::after{content:'';position:absolute;inset:8px;background:#fff;border-radius:2px}
.brand-text{font-weight:600}
.nav-links{display:flex;gap:8px;align-items:center}
.nav-link{color:var(--muted);text-decoration:none;font-size:.875rem;font-weight:500;padding:8px 16px;border-radius:8px;transition:all .2s}
.nav-link:hover,.nav-link.active{color:var(--text);background:var(--surface)}

/* Theme Toggle */
.theme-toggle{
    width:40px;
    height:40px;
    border-radius:10px;
    border:1px solid var(--border);
    background:var(--surface);
    color:var(--text);
    cursor:pointer;
    display:flex;
    align-items:center;
    justify-content:center;
    transition:all .2s;
    margin-left:8px;
}
.theme-toggle:hover{background:var(--elevated);border-color:var(--accent)}
.theme-toggle svg{width:20px;height:20px}
.theme-toggle .sun-icon{display:none}
.theme-toggle .moon-icon{display:block}
[data-theme="light"] .theme-toggle .sun-icon{display:block}
[data-theme="light"] .theme-toggle .moon-icon{display:none}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:8px;font-weight:600;text-decoration:none;transition:all .2s;border:none;cursor:pointer;font-size:.9375rem}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px)}
.btn-secondary{background:var(--surface);color:var(--text);border:1px solid var(--border)}
.btn-secondary:hover{background:var(--elevated)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn-danger{background:var(--error);color:#fff}
.btn-danger:hover{background:#DC2626}

/* Upload Zone - Enhanced */
.upload-zone{
    border:2px dashed var(--border);
    border-radius:24px;
    padding:80px 32px;
    text-align:center;
    cursor:pointer;
    transition:all .3s ease;
    background:var(--surface);
    position:relative;
    overflow:hidden;
}
.upload-zone::before{
    content:'';
    position:absolute;
    inset:0;
    background:var(--dropzone-bg);
    opacity:0;
    transition:opacity .3s;
}
.upload-zone:hover{
    border-color:var(--accent);
    transform:scale(1.01);
    box-shadow:0 0 40px rgba(99,102,241,.15);
}
.upload-zone:hover::before{opacity:1}
.upload-zone.dragover{
    border-color:var(--accent);
    background:var(--dropzone-bg);
    transform:scale(1.02);
    box-shadow:0 0 60px rgba(99,102,241,.2);
}
.upload-zone.dragover .upload-icon{
    transform:translateY(-8px) scale(1.1);
    color:var(--accent);
}
.upload-zone-content{position:relative;z-index:1}
.upload-icon{
    width:80px;
    height:80px;
    margin:0 auto 24px;
    color:var(--muted);
    transition:all .3s ease;
}
.upload-title{font-size:1.25rem;font-weight:600;margin-bottom:8px}
.upload-subtitle{color:var(--muted);font-size:1rem}
.upload-input{display:none}
.upload-hint{
    margin-top:16px;
    font-size:.875rem;
    color:var(--text-secondary);
    display:flex;
    align-items:center;
    justify-content:center;
    gap:8px;
}
.upload-badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:4px 10px;
    background:var(--accent-soft);
    color:var(--accent);
    border-radius:9999px;
    font-size:.75rem;
    font-weight:500;
}

/* Batch Files List */
.batch-files{
    margin-top:24px;
    display:none;
}
.batch-files.active{display:block}
.batch-header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    margin-bottom:16px;
    padding-bottom:12px;
    border-bottom:1px solid var(--border);
}
.batch-title{font-weight:600;font-size:1rem}
.batch-count{color:var(--muted);font-size:.875rem}
.batch-list{max-height:300px;overflow-y:auto}
.batch-item{
    display:flex;
    align-items:center;
    gap:12px;
    padding:12px;
    background:var(--bg);
    border:1px solid var(--border);
    border-radius:12px;
    margin-bottom:8px;
    transition:all .2s;
}
.batch-item:hover{border-color:var(--elevated)}
.batch-item.processing{border-color:var(--accent);background:var(--accent-soft)}
.batch-item.completed{border-color:var(--success);background:rgba(16,185,129,0.05)}
.batch-item.error{border-color:var(--error);background:rgba(239,68,68,0.05)}
.batch-thumb{
    width:48px;
    height:48px;
    border-radius:8px;
    object-fit:cover;
    background:var(--surface);
}
.batch-info{flex:1;min-width:0}
.batch-name{font-weight:500;font-size:.875rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.batch-meta{color:var(--muted);font-size:.75rem;margin-top:2px}
.batch-status{width:24px;height:24px;display:flex;align-items:center;justify-content:center}
.batch-status .spinner{
    width:16px;
    height:16px;
    border:2px solid var(--border);
    border-top-color:var(--accent);
    border-radius:50%;
    animation:spin 1s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
.batch-status .check{color:var(--success);font-size:1.25rem}
.batch-status .error{color:var(--error);font-size:1.25rem}
.batch-remove{
    width:28px;
    height:28px;
    border-radius:6px;
    border:none;
    background:transparent;
    color:var(--muted);
    cursor:pointer;
    display:flex;
    align-items:center;
    justify-content:center;
    transition:all .2s;
}
.batch-remove:hover{background:var(--elevated);color:var(--error)}

/* Progress Indicator */
.progress-container{
    margin-top:24px;
    padding:20px;
    background:var(--bg);
    border:1px solid var(--border);
    border-radius:16px;
    display:none;
}
.progress-container.active{display:block}
.progress-header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    margin-bottom:12px;
}
.progress-title{font-weight:500;font-size:.9375rem}
.progress-percent{color:var(--accent);font-weight:600}
.progress-bar{
    height:8px;
    background:var(--elevated);
    border-radius:9999px;
    overflow:hidden;
}
.progress-fill{
    height:100%;
    background:linear-gradient(90deg,var(--accent),var(--accent-hover));
    border-radius:9999px;
    transition:width .3s ease;
    position:relative;
}
.progress-fill::after{
    content:'';
    position:absolute;
    inset:0;
    background:linear-gradient(90deg,transparent,rgba(255,255,255,0.3),transparent);
    animation:shimmer 1.5s infinite;
}
@keyframes shimmer{
    0%{transform:translateX(-100%)}
    100%{transform:translateX(100%)}
}
.progress-stats{
    display:flex;
    justify-content:space-between;
    margin-top:12px;
    font-size:.875rem;
    color:var(--muted);
}

/* Preview Area */
.preview-area{margin-top:32px;padding:32px;background:var(--surface);border-radius:16px;border:1px solid var(--border);display:none}
.preview-area.active{display:block;animation:fadeIn .3s}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.preview-header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    margin-bottom:16px;
}
.preview-title{font-weight:600}
.preview-dimensions{color:var(--muted);font-size:.875rem}

/* Before/After Comparison */
.comparison-container{
    position:relative;
    width:100%;
    max-width:100%;
    margin:0 auto 24px;
    overflow:hidden;
    border-radius:12px;
    background:var(--bg);
    user-select:none;
}
.comparison-wrapper{position:relative;width:100%;aspect-ratio:var(--comparison-ratio,16/9)}
.comparison-image{
    position:absolute;
    inset:0;
    width:100%;
    height:100%;
    object-fit:contain;
}
.comparison-before{clip-path:inset(0 calc(100% - var(--split,50%)) 0 0)}
.comparison-after{z-index:1}
.comparison-labels{
    position:absolute;
    top:12px;
    left:0;
    right:0;
    display:flex;
    justify-content:space-between;
    padding:0 12px;
    pointer-events:none;
    z-index:2;
}
.comparison-label{
    padding:4px 12px;
    background:rgba(0,0,0,0.7);
    color:#fff;
    border-radius:6px;
    font-size:.75rem;
    font-weight:500;
}
.comparison-slider{
    position:absolute;
    top:0;
    bottom:0;
    left:var(--split,50%);
    width:4px;
    background:#fff;
    cursor:ew-resize;
    transform:translateX(-50%);
    z-index:3;
    box-shadow:0 0 10px rgba(0,0,0,.5);
}
.comparison-handle{
    position:absolute;
    top:50%;
    left:50%;
    transform:translate(-50%,-50%);
    width:44px;
    height:44px;
    background:#fff;
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    box-shadow:0 4px 16px rgba(0,0,0,.3);
    transition:transform .2s;
}
.comparison-slider:hover .comparison-handle{transform:translate(-50%,-50%) scale(1.1)}
.comparison-handle svg{width:20px;height:20px;color:var(--text)}

/* Controls */
.control-group{margin-bottom:24px}
.control-label{display:flex;justify-content:space-between;margin-bottom:12px;font-size:.9375rem;font-weight:500}
.control-value{color:var(--accent)}
input[type=range]{width:100%;height:8px;background:var(--elevated);border-radius:4px;outline:none;-webkit-appearance:none}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;background:var(--accent);border-radius:50%;cursor:pointer;transition:transform .2s}
input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.2)}
input[type=number],select{background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:12px 16px;color:var(--text);font-size:.9375rem;width:100%;transition:border-color .2s}
input[type=number]:focus,select:focus{outline:none;border-color:var(--accent)}
.checkbox-wrap{display:flex;align-items:center;gap:12px;cursor:pointer}
.checkbox-wrap input{width:20px;height:20px;accent-color:var(--accent)}

/* Stats Grid */
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:24px}
.stat-box{text-align:center;padding:20px;background:var(--bg);border-radius:12px;border:1px solid var(--border)}
.stat-label{font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:4px}
.stat-value{font-size:1.25rem;font-weight:700}
.stat-value.success{color:var(--success)}

/* Quick Actions */
.quick-actions{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px}
.action-btn{padding:10px 16px;background:var(--bg);border:1px solid var(--border);border-radius:8px;color:var(--text-secondary);font-size:.875rem;cursor:pointer;transition:all .2s}
.action-btn:hover{background:var(--elevated);color:var(--text)}
.action-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* Footer */
.footer{padding:40px 0;border-top:1px solid var(--border);margin-top:80px;transition:border-color 0.3s}
.footer-content{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:24px}
.footer-links{display:flex;gap:24px;flex-wrap:wrap}
.footer-link{color:var(--muted);text-decoration:none;font-size:.875rem}
.footer-link:hover{color:var(--text)}

/* Toast */
.toast{position:fixed;bottom:24px;right:24px;background:var(--surface);border:1px solid var(--border);padding:16px 24px;border-radius:12px;display:flex;align-items:center;gap:12px;transform:translateY(100px);opacity:0;transition:all .3s;z-index:1000;box-shadow:var(--shadow)}
.toast.show{transform:translateY(0);opacity:1}
.toast.success{border-color:var(--success)}
.toast.error{border-color:var(--error)}

/* Page Header */
.page-header{padding:120px 0 60px;text-align:center}
.page-title{font-size:3rem;font-weight:700;margin-bottom:16px;background:var(--gradient-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.page-subtitle{color:var(--text-secondary);font-size:1.125rem;max-width:600px;margin:0 auto}

/* Tool Layout */
.tool-layout{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.tool-panel{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:32px;transition:background-color 0.3s,border-color 0.3s}
.tool-preview{position:sticky;top:80px}

/* Home Page Specific */
.hero-home{padding:160px 0 100px;text-align:center;position:relative;overflow:hidden}
.hero-home::before{content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);width:1000px;height:600px;background:radial-gradient(ellipse,var(--accent-soft),transparent 60%);pointer-events:none}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--border);color:var(--accent-hover);padding:8px 16px;border-radius:9999px;font-size:.875rem;font-weight:500;margin-bottom:32px}
.hero-title{font-size:4rem;font-weight:700;margin-bottom:24px;background:var(--gradient-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-subtitle{color:var(--text-secondary);font-size:1.25rem;max-width:600px;margin:0 auto 40px}
.features{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:64px}
.feature-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:32px;text-decoration:none;color:var(--text);transition:all .3s;display:flex;flex-direction:column}
.feature-card:hover{border-color:var(--elevated);transform:translateY(-4px);box-shadow:var(--shadow)}
.feature-icon{width:56px;height:56px;background:var(--bg);border:1px solid var(--border);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.75rem;margin-bottom:20px;transition:all .3s}
.feature-card:hover .feature-icon{background:var(--accent);border-color:var(--accent);color:#fff}
.feature-title{font-size:1.25rem;font-weight:600;margin-bottom:8px}
.feature-desc{color:var(--text-secondary);font-size:.9375rem;margin-bottom:16px;flex:1}
.feature-arrow{color:var(--accent);font-weight:600;display:flex;align-items:center;gap:8px}
.support-home{padding:100px 0;text-align:center}
.support-card{background:var(--surface);border:1px solid var(--border);border-radius:24px;padding:48px;max-width:800px;margin:0 auto;transition:background-color 0.3s,border-color 0.3s}
.support-title{font-size:2rem;font-weight:700;margin-bottom:16px}
.support-text{color:var(--text-secondary);max-width:480px;margin:0 auto 32px}
.wallets{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px}
.wallet{background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:20px;text-align:left;cursor:pointer;transition:all .2s}
.wallet:hover{border-color:var(--accent);background:var(--accent-soft)}
.wallet.copied{border-color:var(--success);background:rgba(16,185,129,.05)}
.wallet-name{color:var(--accent);font-weight:600;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.wallet-addr{font-family:monospace;font-size:.75rem;color:var(--muted);word-break:break-all}

@media(max-width:968px){
    .tool-layout{grid-template-columns:1fr}
    .tool-preview{position:static}
    .page-title{font-size:2rem}
    .stats-grid{grid-template-columns:1fr}
    .hero-title{font-size:2.5rem}
    .features{grid-template-columns:1fr}
    .wallets{grid-template-columns:1fr}
}
@media(max-width:640px){
    .nav-links{display:none}
    .page-header{padding:100px 0 40px}
}

/* ZenityX credit block */
.zx-credit{display:flex;flex-direction:column;align-items:center;gap:8px;padding:24px 0;border-bottom:1px solid var(--border);margin-bottom:24px;text-decoration:none;transition:opacity .2s}
.zx-credit:hover{opacity:.8}
.zx-credit-logo{height:32px;width:auto;display:block}
.zx-credit-logo.light{display:none}
[data-theme="light"] .zx-credit-logo.dark{display:none}
[data-theme="light"] .zx-credit-logo.light{display:block}
.zx-credit-text{color:var(--muted);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;font-weight:500}
.zx-credit-text strong{color:var(--text-secondary);font-weight:600}

/* Hamburger menu (mobile) */
.hamburger{display:none;background:transparent;border:1px solid var(--border);border-radius:8px;width:40px;height:40px;color:var(--text);cursor:pointer;align-items:center;justify-content:center;margin-left:8px;padding:0;transition:background .2s,border-color .2s}
.hamburger:hover{background:var(--surface)}
.hamburger svg{width:20px;height:20px}
@media(max-width:640px){
    .hamburger{display:inline-flex}
    .navbar .nav-links{display:none;position:absolute;top:64px;right:16px;left:16px;background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:8px;flex-direction:column;gap:4px;box-shadow:0 12px 32px rgba(0,0,0,0.5);z-index:99}
    [data-theme="light"] .navbar .nav-links{box-shadow:0 12px 32px rgba(0,0,0,0.12)}
    .navbar .nav-links.open{display:flex !important}
    .nav-link{padding:12px 16px;border-radius:8px;font-size:1rem}
    .nav-link.active{background:var(--surface)}
}