:root {
  color-scheme: dark;
  --bg: #0d0d1a;
  --bg2: #12122b;
  --bg3: #1a1a35;
  --surface: rgba(255,255,255,0.04);
  --surface2: rgba(255,255,255,0.07);
  --border: rgba(255,255,255,0.08);
  --primary: #6c63ff;
  --primary-dark: #5a52e0;
  --primary-glow: rgba(108,99,255,0.35);
  --accent: #43bccd;
  --green: #26de81;
  --red: #ff5e5e;
  --yellow: #f7b731;
  --text: #e8e8f0;
  --text2: #a0a0b8;
  --text3: #606080;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 48px rgba(0,0,0,0.6);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}

/* LAYOUT */
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.container-sm{max-width:700px}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:var(--radius-sm);font-family:inherit;font-size:14px;font-weight:600;cursor:pointer;border:none;transition:all .2s ease;text-decoration:none;white-space:nowrap}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 0 20px var(--primary-glow)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 0 28px var(--primary-glow)}
.btn-ghost{background:var(--surface);color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover{background:var(--surface2);color:var(--text)}
.btn-danger{background:rgba(255,94,94,0.15);color:var(--red);border:1px solid rgba(255,94,94,0.25)}
.btn-danger:hover{background:rgba(255,94,94,0.25)}
.btn-sm{padding:6px 14px;font-size:13px}
.btn-lg{padding:14px 28px;font-size:16px;border-radius:10px}
.btn-block{width:100%;justify-content:center}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}

/* LOGO */
.logo{display:inline-flex;align-items:center;gap:8px;font-weight:800;font-size:20px;color:var(--text);text-decoration:none}
.logo:hover{text-decoration:none;color:var(--text)}
.logo-icon{font-size:22px}

/* NAV (landing) */
.nav{position:sticky;top:0;z-index:100;background:rgba(13,13,26,0.8);backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between}
.nav-links{display:flex;align-items:center;gap:12px}

/* APP NAV */
.app-nav{position:sticky;top:0;z-index:100;background:rgba(13,13,26,0.9);backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.app-nav .nav-inner{height:60px}
.app-nav-links{display:flex;align-items:center;gap:4px}
.nav-link{padding:6px 14px;border-radius:var(--radius-sm);font-size:14px;font-weight:500;color:var(--text2);transition:.2s}
.nav-link:hover,.nav-link.active{background:var(--surface2);color:var(--text);text-decoration:none}
.nav-user{display:flex;align-items:center;gap:10px}
.nav-username{font-size:14px;font-weight:500;color:var(--text2)}
.user-avatar{width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;color:#fff;flex-shrink:0}

/* BURGER BUTTON */
.burger{display:none;flex-direction:column;justify-content:center;gap:5px;width:36px;height:36px;padding:6px;background:none;border:none;cursor:pointer;border-radius:var(--radius-sm);flex-shrink:0}
.burger span{display:block;height:2px;width:100%;background:var(--text2);border-radius:2px;transition:transform .25s ease, opacity .2s ease}
.burger:hover span{background:var(--text)}
.burger-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger-open span:nth-child(2){opacity:0}
.burger-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* MOBILE USER ROW (inside dropdown) */
.mobile-user-row{display:none}

/* HERO (landing) */
.landing-body{overflow-x:hidden}
.hero{position:relative;padding:100px 24px 80px;text-align:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;pointer-events:none}
.hero-orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.45}
.orb-1{width:500px;height:500px;background:radial-gradient(circle,#6c63ff,transparent);top:-100px;left:-100px}
.orb-2{width:400px;height:400px;background:radial-gradient(circle,#43bccd,transparent);bottom:-80px;right:-80px}
.orb-3{width:350px;height:350px;background:radial-gradient(circle,#ff6584,transparent);top:50%;left:50%;transform:translate(-50%,-50%)}
.hero-content{position:relative;z-index:1}
.hero-badge{display:inline-block;padding:6px 18px;border-radius:100px;background:rgba(108,99,255,0.15);border:1px solid rgba(108,99,255,0.3);font-size:13px;font-weight:600;color:var(--primary);margin-bottom:24px;letter-spacing:.5px}
.hero-title{font-size:clamp(42px,7vw,76px);font-weight:900;line-height:1.05;letter-spacing:-2px;margin-bottom:24px}
.gradient-text{background:linear-gradient(135deg,#6c63ff,#43bccd,#ff6584);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-sub{font-size:18px;color:var(--text2);max-width:560px;margin:0 auto 40px}
.hero-actions{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;margin-bottom:48px}
.hero-stats{display:flex;align-items:center;justify-content:center;gap:32px;flex-wrap:wrap}
.hero-stat{display:flex;flex-direction:column;gap:2px}
.hero-stat strong{font-size:18px;font-weight:700}
.hero-stat span{font-size:13px;color:var(--text2)}
.hero-stat-divider{width:1px;height:36px;background:var(--border)}

/* FEATURES */
.features{padding:80px 0}
.section-title{font-size:clamp(28px,4vw,40px);font-weight:800;text-align:center;margin-bottom:12px;letter-spacing:-1px}
.section-sub{text-align:center;color:var(--text2);margin-bottom:56px;font-size:17px}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.feature-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:.3s}
.feature-card:hover{background:var(--surface2);border-color:rgba(108,99,255,0.3);transform:translateY(-4px)}
.feature-icon{font-size:32px;margin-bottom:16px}
.feature-card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.feature-card p{color:var(--text2);font-size:14px;line-height:1.7}

/* CTA */
.cta-section{padding:80px 0}
.cta-card{background:linear-gradient(135deg,rgba(108,99,255,0.15),rgba(67,188,205,0.1));border:1px solid rgba(108,99,255,0.25);border-radius:20px;padding:60px;text-align:center}
.cta-card h2{font-size:36px;font-weight:800;margin-bottom:12px}
.cta-card p{color:var(--text2);margin-bottom:28px;font-size:17px}

/* FOOTER */
.footer{padding:28px 0;border-top:1px solid var(--border)}
.footer-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.footer-copy{color:var(--text3);font-size:13px}

/* AUTH */
.auth-body{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:24px;position:relative;overflow:hidden}
.auth-bg{position:fixed;inset:0;pointer-events:none}
.auth-container{position:relative;z-index:1;width:100%;max-width:440px;display:flex;flex-direction:column;align-items:center;gap:24px}
.auth-logo{margin-bottom:0}
.auth-card{background:var(--bg3);border:1px solid var(--border);border-radius:20px;padding:36px;width:100%;box-shadow:var(--shadow-lg)}
.auth-title{font-size:26px;font-weight:800;margin-bottom:6px}
.auth-sub{color:var(--text2);margin-bottom:24px;font-size:14px}
.auth-switch{text-align:center;font-size:13px;color:var(--text2);margin-top:20px}

/* FORMS */
.auth-form,.upload-card form{display:flex;flex-direction:column;gap:18px}
.form-group{display:flex;flex-direction:column;gap:6px}
.form-label{font-size:13px;font-weight:600;color:var(--text2)}
.form-hint{font-weight:400;color:var(--text3)}
.form-input{background:rgba(255,255,255,0.05);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 16px;font-family:inherit;font-size:14px;color:var(--text);transition:.2s;width:100%}
.form-input option{background:var(--bg2);color:var(--text)}
.form-input:focus{outline:none;border-color:var(--primary);background:rgba(108,99,255,0.08);box-shadow:0 0 0 3px var(--primary-glow)}
.form-input::placeholder{color:var(--text3)}
.form-textarea{resize:vertical;min-height:72px}
.input-wrapper{position:relative}
.input-wrapper .form-input{padding-right:44px}
.toggle-pass{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:none;border:none;cursor:pointer;font-size:16px;color:var(--text2);padding:4px}

/* Password strength */
.password-strength{margin-top:6px;font-size:12px;font-weight:600;padding:4px 8px;border-radius:4px;display:inline-block}
.strength-weak{color:#ff5e5e;background:rgba(255,94,94,0.1)}
.strength-fair{color:var(--yellow);background:rgba(247,183,49,0.1)}
.strength-good{color:var(--accent);background:rgba(67,188,205,0.1)}
.strength-strong{color:var(--green);background:rgba(38,222,129,0.1)}

/* ALERTS */
.alert{padding:14px 18px;border-radius:var(--radius-sm);font-size:14px;margin-bottom:4px}
.alert-error{background:rgba(255,94,94,0.1);border:1px solid rgba(255,94,94,0.3);color:#ff8080}
.alert-success{background:rgba(38,222,129,0.1);border:1px solid rgba(38,222,129,0.3);color:#5af59d}
.welcome-banner{margin-bottom:28px}

/* APP MAIN */
.app-body{background:var(--bg)}
.app-main{padding:36px 0 80px}
.page-header{margin-bottom:32px}
.page-title{font-size:28px;font-weight:800;letter-spacing:-1px}
.page-sub{color:var(--text2);margin-top:6px;font-size:14px}

/* STATS ROW */
.stats-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:36px}
.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;display:flex;align-items:center;gap:16px}
.stat-card.stat-cta{flex-direction:column;align-items:flex-start;justify-content:center}
.stat-icon{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.stat-info{display:flex;flex-direction:column;gap:2px}
.stat-value{font-size:22px;font-weight:800;line-height:1}
.stat-label{font-size:12px;color:var(--text2);font-weight:500}

/* FILE GRID */
.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.section-heading{font-size:18px;font-weight:700}
.section-count{font-size:13px;color:var(--text3);background:var(--surface);padding:4px 10px;border-radius:100px;border:1px solid var(--border)}
.file-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.file-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;display:flex;flex-direction:column;gap:10px;transition:.25s}
.file-card:hover{border-color:rgba(108,99,255,0.3);background:var(--surface2)}
.file-card-top{display:flex;align-items:center;justify-content:space-between}
.file-type-icon{font-size:28px}
.file-meta-right{display:flex;align-items:center;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.file-size{font-size:12px;color:var(--text2);font-weight:500}
.badge{font-size:11px;padding:2px 8px;border-radius:100px;font-weight:600}
.badge-private{background:rgba(255,183,49,0.1);color:var(--yellow);border:1px solid rgba(247,183,49,0.2)}
.badge-public{background:rgba(38,222,129,0.1);color:var(--green);border:1px solid rgba(38,222,129,0.2)}
.visibility-badge{font-size:11px;padding:2px 8px;border-radius:100px;font-weight:600;transition:background .25s,color .25s;white-space:nowrap}
.badge-lock{background:rgba(108,99,255,0.1);color:var(--primary);border:1px solid rgba(108,99,255,0.2)}
.file-name{font-size:14px;font-weight:600;word-break:break-all;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-desc{font-size:12px;color:var(--text2);line-height:1.5}
.file-stats{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--text3)}
.file-expired{font-size:12px;color:var(--yellow);font-weight:600}
.file-actions{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-top:4px}

/* EMPTY STATE */
.empty-state{text-align:center;padding:80px 24px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}
.empty-icon{font-size:56px;margin-bottom:16px}
.empty-state h3{font-size:20px;font-weight:700;margin-bottom:8px}
.empty-state p{color:var(--text2);margin-bottom:24px}

/* UPLOAD CARD */
.upload-card{background:var(--bg3);border:1px solid var(--border);border-radius:20px;padding:32px}
.dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:48px 24px;text-align:center;cursor:pointer;transition:.2s;position:relative}
.dropzone:hover,.dropzone.dragover{border-color:var(--primary);background:rgba(108,99,255,0.05)}
.file-input{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%}
.dropzone-icon{font-size:48px;margin-bottom:12px}
.dropzone-title{font-size:16px;font-weight:600;margin-bottom:6px}
.dropzone-sub{font-size:13px;color:var(--text2)}
.file-selected-info{display:flex;align-items:center;gap:14px;text-align:left}
.file-info-icon{font-size:36px}
.file-info-details{flex:1;overflow:hidden}
.file-info-name{display:block;font-weight:600;font-size:14px;word-break:break-all}
.file-info-size{display:block;font-size:12px;color:var(--text2);margin-top:2px}
.upload-options{display:flex;flex-direction:column;gap:16px;padding-top:8px}
.options-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-check{display:flex;align-items:flex-start;gap:12px;padding:14px 16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer}
.form-checkbox{width:18px;height:18px;accent-color:var(--primary);flex-shrink:0;margin-top:2px;cursor:pointer}
.check-title{display:block;font-size:14px;font-weight:600}
.check-sub{display:block;font-size:12px;color:var(--text2);margin-top:2px}
.share-link-box{display:flex;gap:8px;margin-top:10px}
.share-link-input{flex:1;background:rgba(255,255,255,0.05);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 14px;font-size:13px;color:var(--text);font-family:monospace}
.upload-progress-wrap{display:flex;flex-direction:column;gap:8px}
.upload-progress-bar{height:6px;background:var(--surface);border-radius:100px;overflow:hidden}
.upload-progress-fill{height:100%;background:var(--primary);border-radius:100px;transition:width .3s;width:0}
.upload-progress-label{font-size:12px;color:var(--text2);text-align:center}

/* DOWNLOAD PAGE */
.download-body{display:flex;min-height:100vh;padding:48px 24px;position:relative;overflow-y:auto}
.download-bg{position:fixed;inset:0;pointer-events:none}
.download-container{margin:auto;position:relative;z-index:1;width:100%;max-width:500px;display:flex;flex-direction:column;align-items:center;gap:24px}
.download-logo{margin-bottom:0}
.download-card{background:var(--bg3);border:1px solid var(--border);border-radius:20px;padding:36px;width:100%;box-shadow:var(--shadow-lg);text-align:center}
.download-file-icon{font-size:64px;margin-bottom:16px}
.download-state-icon{font-size:56px;margin-bottom:16px}
.download-title{font-size:20px;font-weight:800;margin-bottom:8px;word-break:break-word}
.download-description{font-size:14px;color:var(--text2);margin-bottom:20px;max-height:150px;overflow-y:auto;padding:12px;background:rgba(255,255,255,0.03);border-radius:var(--radius-sm);text-align:left;line-height:1.5}
.download-meta{color:var(--text2);font-size:14px;margin-bottom:20px}
.download-info-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--border);border-radius:var(--radius-sm);overflow:hidden;margin-bottom:24px;text-align:left}
.download-info-item{background:var(--bg3);padding:12px 16px;display:flex;flex-direction:column;gap:4px}
.download-info-label{font-size:11px;color:var(--text3);font-weight:600;text-transform:uppercase;letter-spacing:.5px}
.download-info-val{font-size:14px;font-weight:500;display:flex;align-items:center;gap:6px;word-break:break-word}
.avatar-dot{display:inline-block;width:10px;height:10px;border-radius:50%;flex-shrink:0}
.dl-password-form{display:flex;flex-direction:column;gap:14px}
.dl-btn{margin-top:4px}
.download-footer-note{font-size:13px;color:var(--text3);margin-top:20px}
.private-owner-notice{background:rgba(247,183,49,0.1);border:1px solid rgba(247,183,49,0.25);color:var(--yellow);font-size:13px;font-weight:600;padding:10px 14px;border-radius:var(--radius-sm);margin-bottom:16px;text-align:center}

/* ANALYTICS */
.chart-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:24px}
.chart-header{margin-bottom:20px}
.chart-title{font-size:16px;font-weight:700}
.chart-wrap{position:relative}
.analytics-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.analytics-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px}
.analytics-card-title{font-size:15px;font-weight:700;margin-bottom:18px}
.top-files-list{display:flex;flex-direction:column;gap:12px}
.top-file-row{display:flex;align-items:center;gap:10px}
.top-file-rank{font-size:13px;font-weight:700;color:var(--text3);width:18px;flex-shrink:0}
.top-file-icon{font-size:20px;flex-shrink:0}
.top-file-info{flex:1;overflow:hidden}
.top-file-name{display:block;font-size:13px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.top-file-size{display:block;font-size:11px;color:var(--text3);margin-top:1px}
.top-file-count{font-size:13px;font-weight:700;color:var(--primary);flex-shrink:0}
.recent-log{display:flex;flex-direction:column;gap:10px;max-height:340px;overflow-y:auto}
.log-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 0;border-bottom:1px solid var(--border)}
.log-row:last-child{border-bottom:none}
.log-row-left{overflow:hidden}
.log-filename{display:block;font-size:13px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.log-ip{display:block;font-size:11px;color:var(--text3);margin-top:2px;font-family:monospace}
.log-time{font-size:12px;color:var(--text2);flex-shrink:0}
.empty-mini{color:var(--text3);font-size:14px;text-align:center;padding:24px 0}

/* MODAL */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.7);backdrop-filter:blur(4px);z-index:1000;display:none;align-items:center;justify-content:center;padding:24px}
.modal-overlay.open{display:flex}
.modal{background:var(--bg3);border:1px solid var(--border);border-radius:20px;padding:36px;max-width:400px;width:100%;text-align:center;box-shadow:var(--shadow-lg);animation:modalIn .25s ease}
@keyframes modalIn{from{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}
.modal-icon{font-size:48px;margin-bottom:16px}
.modal-title{font-size:20px;font-weight:800;margin-bottom:8px}
.modal-body{color:var(--text2);font-size:14px;margin-bottom:24px}
.modal-actions{display:flex;align-items:center;justify-content:center;gap:10px}

/* TOAST */
.toast{position:fixed;bottom:28px;right:28px;background:var(--bg3);border:1px solid rgba(38,222,129,0.3);color:var(--green);padding:12px 20px;border-radius:var(--radius-sm);font-size:14px;font-weight:600;box-shadow:var(--shadow);opacity:0;transform:translateY(10px);transition:.3s;pointer-events:none;z-index:2000}
.toast.show{opacity:1;transform:translateY(0)}

/* RESPONSIVE */
@media(max-width:800px){
    .burger{display:flex}
    .nav-user{display:none}

    .app-nav-links{
        display:none;
        position:absolute;
        top:60px;
        left:0;right:0;
        background:rgba(13,13,26,0.97);
        backdrop-filter:blur(16px);
        border-bottom:1px solid var(--border);
        flex-direction:column;
        align-items:stretch;
        gap:4px;
        padding:12px 16px 16px;
        z-index:99;
    }
    .app-nav-links.nav-open{display:flex}
    .app-nav-links .nav-link{padding:10px 14px;font-size:15px}

    .mobile-user-row{
        display:flex;
        align-items:center;
        gap:10px;
        padding:10px 14px 0;
        margin-top:4px;
        border-top:1px solid var(--border);
    }
    .mobile-user-row .nav-username{flex:1;font-size:14px;font-weight:500;color:var(--text2)}
}
@media(max-width:768px){
  .analytics-grid{grid-template-columns:1fr}
  .options-row{grid-template-columns:1fr}
  .file-grid{grid-template-columns:1fr}
  .stats-row{grid-template-columns:1fr 1fr}
  .hero-title{letter-spacing:-1px}
  .download-info-grid{grid-template-columns:1fr}
  .nav-username{display:none}
}
@media(max-width:480px){
  .stats-row{grid-template-columns:1fr}
  .auth-card,.upload-card,.download-card{padding:24px}
}