*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:'Inter',sans-serif;background:#f8fafc;color:#1e293b;line-height:1.6;}
a{text-decoration:none;color:inherit;}
img{max-width:100%;}
:root{
  --primary:#3b82f6;--primary-dark:#2563eb;--secondary:#8b5cf6;
  --success:#10b981;--danger:#ef4444;--warning:#f59e0b;
  --dark:#1e293b;--gray:#64748b;--light:#f1f5f9;
  --border:#e2e8f0;--radius:12px;--shadow:0 4px 20px rgba(0,0,0,.08);
}
.container{max-width:1200px;margin:0 auto;padding:0 1.5rem;}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.65rem 1.4rem;
  border-radius:8px;font-weight:600;font-size:.9rem;cursor:pointer;
  border:none;transition:all .2s;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);}
.btn-secondary{background:var(--light);color:var(--dark);}
.btn-secondary:hover{background:var(--border);}
.btn-danger{background:var(--danger);color:#fff;}
.btn-success{background:var(--success);color:#fff;}
.btn-white{background:#fff;color:var(--primary);}
.btn-block{width:100%;justify-content:center;}
.btn-sm{padding:.4rem .9rem;font-size:.82rem;}
.alert{padding:.85rem 1rem;border-radius:8px;margin-bottom:1rem;font-size:.9rem;}
.alert-error{background:#fef2f2;color:#dc2626;border:1px solid #fecaca;}
.alert-success{background:#f0fdf4;color:#16a34a;border:1px solid #bbf7d0;}
.alert-info{background:#eff6ff;color:#2563eb;border:1px solid #bfdbfe;}
.form-group{margin-bottom:1.1rem;}
.form-group label{display:block;font-size:.88rem;font-weight:500;color:var(--dark);margin-bottom:.4rem;}
.form-group input,.form-group select,.form-group textarea{
  width:100%;padding:.72rem 1rem;border:1.5px solid var(--border);
  border-radius:8px;font-size:.95rem;font-family:inherit;
  background:#fff;transition:border-color .2s;color:var(--dark);}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
  outline:none;border-color:var(--primary);}
.form-group textarea{resize:vertical;min-height:100px;}
.form-hint{font-size:.8rem;color:var(--gray);margin-top:.3rem;}
.header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;}
.header .container{display:flex;align-items:center;justify-content:space-between;height:64px;}
.logo{font-size:1.5rem;font-weight:700;color:var(--dark);}
.logo span{color:var(--primary);}
.nav{display:flex;align-items:center;gap:1.5rem;}
.nav a{color:var(--gray);font-size:.9rem;font-weight:500;transition:color .2s;}
.nav a:hover{color:var(--primary);}
.nav-toggle{display:none;background:none;border:none;font-size:1.4rem;cursor:pointer;}
.hero{background:linear-gradient(135deg,#1e3a8a 0%,#3b82f6 50%,#8b5cf6 100%);
  padding:5rem 0 4rem;text-align:center;color:#fff;}
.hero h1{font-size:2.8rem;font-weight:700;line-height:1.2;margin-bottom:1rem;}
.hero p{font-size:1.1rem;opacity:.9;max-width:560px;margin:0 auto 2.5rem;}
.shorten-box{background:#fff;border-radius:var(--radius);padding:1.75rem;
  max-width:700px;margin:0 auto;box-shadow:0 8px 40px rgba(0,0,0,.2);}
.shorten-form{display:flex;gap:.75rem;}
.shorten-form input{flex:1;padding:.85rem 1.1rem;border:1.5px solid var(--border);
  border-radius:8px;font-size:1rem;font-family:inherit;}
.shorten-form input:focus{outline:none;border-color:var(--primary);}
.hint{font-size:.82rem;color:var(--gray);margin-top:.75rem;}
.hint a{color:var(--primary);}
.result-box{display:flex;gap:.75rem;margin-bottom:1rem;}
.result-box input{flex:1;padding:.75rem 1rem;border:1.5px solid var(--border);
  border-radius:8px;background:#f8fafc;font-size:.95rem;color:var(--primary);font-weight:600;}
.stats{padding:3rem 0;background:#fff;}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem;}
.stat-card{text-align:center;padding:1.5rem;}
.stat-num{font-size:2.2rem;font-weight:700;color:var(--primary);}
.stat-label{color:var(--gray);font-size:.9rem;margin-top:.25rem;}
.features{padding:5rem 0;}
.features h2{text-align:center;font-size:2rem;margin-bottom:3rem;}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;}
.feature-card{background:#fff;padding:1.75rem;border-radius:var(--radius);
  border:1px solid var(--border);transition:transform .2s,box-shadow .2s;}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.feature-icon{font-size:2rem;margin-bottom:1rem;}
.feature-card h3{font-size:1.05rem;margin-bottom:.5rem;}
.feature-card p{color:var(--gray);font-size:.9rem;line-height:1.6;}
.cta{background:linear-gradient(135deg,#3b82f6,#8b5cf6);padding:4rem 0;text-align:center;color:#fff;}
.cta h2{font-size:2rem;margin-bottom:.75rem;}
.cta p{opacity:.9;margin-bottom:2rem;}
.footer{background:var(--dark);color:#94a3b8;padding:3rem 0 1.5rem;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2rem;margin-bottom:2rem;}
.footer .logo{color:#fff;margin-bottom:.75rem;display:block;}
.footer p{font-size:.88rem;line-height:1.7;}
.footer h4{color:#fff;font-size:.9rem;margin-bottom:1rem;}
.footer a{display:block;font-size:.88rem;color:#94a3b8;margin-bottom:.5rem;}
.footer a:hover{color:#fff;}
.footer-bottom{border-top:1px solid #334155;padding-top:1.5rem;text-align:center;font-size:.85rem;}
.auth-page{background:var(--light);min-height:100vh;
  display:flex;align-items:center;justify-content:center;padding:2rem;}
.auth-container{width:100%;max-width:420px;}
.auth-box{background:#fff;padding:2.5rem;border-radius:var(--radius);box-shadow:var(--shadow);text-align:center;}
.auth-box .logo{display:block;font-size:2rem;margin-bottom:.5rem;}
.auth-box h2{font-size:1.4rem;margin-bottom:1.5rem;color:var(--dark);}
.auth-links{margin-top:1.25rem;font-size:.88rem;color:var(--gray);}
.auth-links a{color:var(--primary);}
.auth-links span{margin:0 .5rem;}
.dash-layout{display:flex;min-height:100vh;}
.sidebar{width:240px;background:#fff;border-right:1px solid var(--border);
  position:fixed;top:0;left:0;height:100vh;overflow-y:auto;z-index:50;
  display:flex;flex-direction:column;}
.sidebar-header{padding:1.25rem 1.5rem;border-bottom:1px solid var(--border);}
.sidebar-menu{padding:1rem 0;flex:1;}
.sidebar-menu a{display:flex;align-items:center;gap:.75rem;padding:.7rem 1.5rem;
  color:var(--gray);font-size:.9rem;font-weight:500;transition:all .2s;}
.sidebar-menu a:hover,.sidebar-menu a.active{color:var(--primary);background:#eff6ff;}
.sidebar-menu a.active{border-right:3px solid var(--primary);}
.menu-icon{font-size:1.1rem;width:20px;text-align:center;}
.sidebar-footer{padding:1rem 1.5rem;border-top:1px solid var(--border);}
.dash-main{margin-left:240px;flex:1;min-height:100vh;background:var(--light);}
.dash-topbar{background:#fff;border-bottom:1px solid var(--border);
  padding:0 2rem;height:60px;display:flex;align-items:center;
  justify-content:space-between;position:sticky;top:0;z-index:40;}
.dash-topbar h1{font-size:1.1rem;font-weight:600;}
.topbar-user{display:flex;align-items:center;gap:.75rem;font-size:.9rem;}
.avatar-sm{width:36px;height:36px;border-radius:50%;background:var(--primary);
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;}
.dash-content{padding:2rem;}
.card{background:#fff;border-radius:var(--radius);border:1px solid var(--border);
  padding:1.5rem;margin-bottom:1.5rem;}
.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.25rem;}
.card-title{font-size:1rem;font-weight:600;}
.overview-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.25rem;margin-bottom:1.5rem;}
.overview-card{background:#fff;border-radius:var(--radius);border:1px solid var(--border);padding:1.25rem 1.5rem;}
.overview-card .ov-label{font-size:.82rem;color:var(--gray);margin-bottom:.4rem;}
.overview-card .ov-num{font-size:1.8rem;font-weight:700;color:var(--dark);}
.overview-card .ov-icon{font-size:1.5rem;float:right;margin-top:-2.2rem;}
.table-wrap{overflow-x:auto;}
table{width:100%;border-collapse:collapse;font-size:.88rem;}
thead th{background:var(--light);padding:.75rem 1rem;text-align:left;
  font-weight:600;color:var(--dark);border-bottom:1px solid var(--border);}
tbody td{padding:.8rem 1rem;border-bottom:1px solid var(--border);color:var(--dark);vertical-align:middle;}
tbody tr:last-child td{border-bottom:none;}
tbody tr:hover{background:#fafafa;}
.badge{display:inline-block;padding:.2rem .65rem;border-radius:20px;font-size:.75rem;font-weight:600;}
.badge-success{background:#dcfce7;color:#16a34a;}
.badge-danger{background:#fee2e2;color:#dc2626;}
.badge-warning{background:#fef9c3;color:#ca8a04;}
.badge-info{background:#dbeafe;color:#2563eb;}
.badge-gray{background:#f1f5f9;color:#64748b;}
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);
  z-index:200;align-items:center;justify-content:center;}
.modal-overlay.open{display:flex;}
.modal{background:#fff;border-radius:var(--radius);padding:2rem;
  width:100%;max-width:520px;max-height:90vh;overflow-y:auto;}
.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;}
.modal-close{background:none;border:none;font-size:1.4rem;cursor:pointer;color:var(--gray);}
.toast-container{position:fixed;top:1.5rem;right:1.5rem;z-index:999;display:flex;flex-direction:column;gap:.5rem;}
.toast{background:#1e293b;color:#fff;padding:.85rem 1.25rem;border-radius:8px;
  font-size:.88rem;animation:slideIn .3s ease;box-shadow:var(--shadow);}
.toast.success{background:#16a34a;}
.toast.error{background:#dc2626;}
@keyframes slideIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}
.empty-state{text-align:center;padding:3rem 1rem;color:var(--gray);}
.empty-state .empty-icon{font-size:3rem;margin-bottom:1rem;}
.empty-state h3{font-size:1.1rem;color:var(--dark);margin-bottom:.5rem;}
.empty-state p{font-size:.9rem;margin-bottom:1.5rem;}
.pagination{display:flex;gap:.5rem;justify-content:center;margin-top:1.5rem;}
.pagination a,.pagination span{padding:.45rem .85rem;border-radius:6px;
  font-size:.88rem;border:1px solid var(--border);color:var(--gray);}
.pagination a:hover{background:var(--primary);color:#fff;border-color:var(--primary);}
.pagination .current{background:var(--primary);color:#fff;border-color:var(--primary);}
.copy-group{display:flex;gap:.5rem;}
.copy-group input{flex:1;background:#f8fafc;font-size:.88rem;}
.admin-sidebar{background:#1e293b !important;}
.admin-sidebar .sidebar-header{border-color:#334155 !important;}
.admin-sidebar .sidebar-menu a{color:#94a3b8 !important;}
.admin-sidebar .sidebar-menu a:hover,
.admin-sidebar .sidebar-menu a.active{color:#fff !important;background:rgba(255,255,255,.08) !important;}
.admin-sidebar .sidebar-footer{border-color:#334155 !important;}
@media(max-width:1024px){
  .overview-grid{grid-template-columns:repeat(2,1fr);}
  .features-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media(max-width:768px){
  .hero h1{font-size:2rem;}
  .shorten-form{flex-direction:column;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .features-grid{grid-template-columns:1fr;}
  .nav{display:none;position:absolute;top:64px;left:0;right:0;
    background:#fff;flex-direction:column;padding:1rem;border-bottom:1px solid var(--border);}
  .nav.open{display:flex;}
  .nav-toggle{display:block;}
  .sidebar{transform:translateX(-100%);transition:transform .3s;}
  .sidebar.open{transform:translateX(0);}
  .dash-main{margin-left:0;}
  .footer-grid{grid-template-columns:1fr;}
  .overview-grid{grid-template-columns:1fr 1fr;}
}
@media(max-width:480px){
  .overview-grid{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:1fr;}
}

/* ===== DARK MODE ===== */
[data-theme="dark"] {
  --primary:#60a5fa;
  --primary-dark:#3b82f6;
  --dark:#f1f5f9;
  --gray:#94a3b8;
  --light:#1e293b;
  --border:#334155;
  --shadow:0 4px 20px rgba(0,0,0,.3);
}
[data-theme="dark"] body {
  background:#0f172a;
  color:#e2e8f0;
}
[data-theme="dark"] .header,
[data-theme="dark"] .sidebar,
[data-theme="dark"] .dash-topbar,
[data-theme="dark"] .card,
[data-theme="dark"] .auth-box,
[data-theme="dark"] .overview-card,
[data-theme="dark"] .shorten-box {
  background:#1e293b;
  border-color:#334155;
}
[data-theme="dark"] .sidebar-menu a:hover,
[data-theme="dark"] .sidebar-menu a.active {
  background:#0f172a;
}
[data-theme="dark"] table thead th {
  background:#0f172a;
}
[data-theme="dark"] tbody tr:hover {
  background:#0f172a;
}
[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group select,
[data-theme="dark"] .form-group textarea {
  background:#0f172a;
  border-color:#334155;
  color:#e2e8f0;
}
[data-theme="dark"] .btn-secondary {
  background:#334155;
  color:#e2e8f0;
}
[data-theme="dark"] .stats {
  background:#1e293b;
}
[data-theme="dark"] .feature-card {
  background:#1e293b;
  border-color:#334155;
}

/* ===== LOADING STATE ===== */
.btn-loading{position:relative;color:transparent !important;}
.btn-loading::after{content:'';position:absolute;width:16px;height:16px;
  top:50%;left:50%;margin:-8px 0 0 -8px;border:2px solid #fff;
  border-top-color:transparent;border-radius:50%;animation:spin .6s linear infinite;}
@keyframes spin{to{transform:rotate(360deg)}}

/* ===== SKELETON LOADER ===== */
.skeleton{background:linear-gradient(90deg,#f1f5f9 25%,#e2e8f0 50%,#f1f5f9 75%);
  background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:6px;}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* ===== SMOOTH TRANSITIONS ===== */
.card{transition:box-shadow .2s;}
.card:hover{box-shadow:0 8px 30px rgba(0,0,0,.1);}
.overview-card{transition:transform .2s,box-shadow .2s;}
.overview-card:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,.1);}

/* ===== BETTER MOBILE ===== */
@media(max-width:768px){
  .dash-content{padding:1rem;}
  .card{padding:1rem;}
  .dash-topbar{padding:0 1rem;}
  .overview-grid{grid-template-columns:1fr 1fr;gap:.75rem;}
  .overview-card{padding:1rem;}
  .ov-num{font-size:1.4rem;}
  table{font-size:.8rem;}
  thead th,tbody td{padding:.6rem .75rem;}
  .btn{padding:.55rem 1rem;}
  .shorten-box{padding:1.25rem;}
  .hero{padding:3rem 0 2.5rem;}
  .hero h1{font-size:1.75rem;}
}

/* ===== BETTER EMPTY STATE ===== */
.empty-state{padding:4rem 1rem;}
.empty-state .empty-icon{font-size:4rem;margin-bottom:1.25rem;
  display:block;animation:bounce 2s ease infinite;}
@keyframes bounce{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

/* ===== COPY BUTTON FEEDBACK ===== */
.copy-success{background:var(--success) !important;transition:background .3s;}

/* ===== BETTER SIDEBAR ===== */
.sidebar-menu a{border-radius:8px;margin:2px 8px;padding:.7rem 1rem;}
.sidebar-menu a.active{border-right:none;background:#eff6ff;}
.sidebar-menu .menu-section{font-size:.72rem;font-weight:600;color:var(--gray);
  text-transform:uppercase;letter-spacing:.05em;padding:.75rem 1rem .25rem;}

/* ===== NOTIFICATION BADGE ===== */
.nav-badge{display:inline-flex;align-items:center;justify-content:center;
  min-width:18px;height:18px;background:var(--danger);color:#fff;
  border-radius:20px;font-size:.7rem;font-weight:700;margin-left:auto;padding:0 4px;}

/* ===== BETTER FORM ===== */
.input-group{display:flex;border:1.5px solid var(--border);border-radius:8px;overflow:hidden;}
.input-group input{border:none !important;border-radius:0 !important;flex:1;}
.input-group .input-prefix{padding:.72rem 1rem;background:var(--light);
  color:var(--gray);font-size:.9rem;white-space:nowrap;border-right:1px solid var(--border);}
.input-group .input-suffix{padding:.72rem 1rem;background:var(--light);
  color:var(--gray);font-size:.9rem;white-space:nowrap;border-left:1px solid var(--border);}

/* ===== BETTER TABLE ===== */
.table-responsive{overflow-x:auto;-webkit-overflow-scrolling:touch;}
tbody tr{transition:background .15s;}

/* ===== STATUS DOT ===== */
.status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px;}
.status-dot.green{background:var(--success);}
.status-dot.red{background:var(--danger);}
.status-dot.yellow{background:var(--warning);}

/* ===== TOOLTIP ===== */
[data-tooltip]{position:relative;cursor:help;}
[data-tooltip]:hover::after{content:attr(data-tooltip);position:absolute;
  bottom:calc(100% + 6px);left:50%;transform:translateX(-50%);
  background:#1e293b;color:#fff;padding:.35rem .75rem;border-radius:6px;
  font-size:.78rem;white-space:nowrap;z-index:100;pointer-events:none;}

/* ===== PROGRESS BAR ===== */
.progress{background:var(--light);border-radius:20px;height:8px;overflow:hidden;}
.progress-bar{height:100%;border-radius:20px;background:var(--primary);
  transition:width .3s ease;}

/* ===== DARK MODE FIXES ===== */
[data-theme="dark"] .skeleton{
  background:linear-gradient(90deg,#1e293b 25%,#334155 50%,#1e293b 75%);
  background-size:200% 100%;}
[data-theme="dark"] .input-group .input-prefix,
[data-theme="dark"] .input-group .input-suffix{background:#0f172a;border-color:#334155;}
[data-theme="dark"] .overview-card:hover{box-shadow:0 8px 20px rgba(0,0,0,.3);}