.btn {
    display:inline-block; padding:.75rem 2rem; border-radius:var(--radius-sm);
    font-weight:600; font-size:1rem; text-align:center;
    transition:all .3s; border:2px solid transparent; cursor:pointer;
}
.btn-primary { background:var(--red); color:var(--white); }
.btn-primary:hover { background:var(--red-hover); transform:translateY(-2px); box-shadow:0 8px 20px rgba(214,28,28,.3); }
.btn-secondary { background:transparent; border-color:var(--white); color:var(--white); }
.btn-secondary:hover { background:var(--white); color:var(--black); }
.btn-outline { background:transparent; border-color:var(--red); color:var(--red); }
.btn-outline:hover { background:var(--red); color:var(--white); }
.btn-sm { padding:.4rem 1rem; font-size:.875rem; }
.btn-lg { padding:1rem 2.5rem; font-size:1.2rem; }
.btn-block { display:block; width:100%; }
.btn:disabled { opacity:.5; cursor:not-allowed; transform:none!important; }
.card { background:var(--gray-dark); border-radius:var(--radius); padding:1.5rem; transition:transform .3s,box-shadow .3s; }
.card:hover { transform:translateY(-4px); box-shadow:var(--shadow); }
.card-header { font-size:1.25rem; font-weight:600; margin-bottom:1rem; }
.card-body { color:var(--gray-light); }
.card-footer { margin-top:1.5rem; border-top:1px solid var(--border); padding-top:1rem; }
.modal-overlay {
    position:fixed; top:0; left:0; width:100%; height:100%;
    background:rgba(0,0,0,.7); display:flex; align-items:center; justify-content:center;
    z-index:1000; opacity:0; visibility:hidden; transition:opacity .3s,visibility .3s;
}
.modal-overlay.active { opacity:1; visibility:visible; }
.modal {
    background:var(--gray-dark); border-radius:var(--radius); padding:2rem;
    max-width:500px; width:90%; max-height:90vh; overflow-y:auto; box-shadow:var(--shadow);
}
.modal-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:1.5rem; }
.modal-header h3 { margin:0; }
.modal-close { font-size:1.5rem; cursor:pointer; color:var(--gray-light); }
.modal-close:hover { color:var(--white); }
.modal-footer { margin-top:1.5rem; display:flex; gap:.5rem; justify-content:flex-end; }
.tabs { display:flex; gap:.5rem; border-bottom:2px solid var(--border); margin-bottom:1.5rem; }
.tab { padding:.75rem 1.5rem; color:var(--gray-light); border-bottom:2px solid transparent; transition:all .3s; cursor:pointer; }
.tab:hover { color:var(--white); }
.tab.active { color:var(--white); border-bottom-color:var(--red); }
.tab-content { display:none; }
.tab-content.active { display:block; }
.table-wrapper { overflow-x:auto; }
table { width:100%; border-collapse:collapse; background:var(--gray-dark); border-radius:var(--radius); overflow:hidden; }
th, td { padding:.75rem 1rem; text-align:left; border-bottom:1px solid var(--border); }
th { background:var(--black-intense); color:var(--gray-light); font-weight:600; }
tr:hover { background:rgba(255,255,255,.03); }
.form-group { margin-bottom:1.25rem; }
.form-group label { display:block; margin-bottom:.25rem; font-weight:500; }
.form-control {
    width:100%; padding:.75rem; border-radius:var(--radius-sm);
    border:1px solid var(--border); background:var(--black-intense); color:var(--white);
    font-size:1rem; transition:border-color .3s;
}
.form-control:focus { outline:none; border-color:var(--red); }
.form-control.error { border-color:var(--error); }
.form-control.success { border-color:var(--success); }
.form-control::placeholder { color:var(--gray-light); opacity:.6; }
.form-hint { font-size:.8rem; color:var(--gray-light); margin-top:.25rem; }
.form-error { font-size:.8rem; color:var(--error); margin-top:.25rem; }
.toast-container {
    position:fixed; top:20px; right:20px; z-index:2000;
    display:flex; flex-direction:column; gap:.5rem;
}
.toast {
    background:var(--gray-dark); padding:1rem 1.5rem; border-radius:var(--radius-sm);
    border-left:4px solid var(--white); box-shadow:var(--shadow);
    min-width:280px; max-width:450px; animation:slideIn .3s ease;
}
.toast-success { border-left-color:var(--success); }
.toast-error { border-left-color:var(--error); }
.toast-warning { border-left-color:var(--warning); }
.toast-info { border-left-color:var(--red); }
@keyframes slideIn { from { transform:translateX(100%); opacity:0; } to { transform:translateX(0); opacity:1; } }
.toast-close { float:right; cursor:pointer; background:none; border:none; color:var(--gray-light); font-size:1.2rem; }
.toast-close:hover { color:var(--white); }
.skeleton { background:linear-gradient(90deg,var(--gray-dark) 25%,#2a2a2a 50%,var(--gray-dark) 75%); background-size:200% 100%; animation:shimmer 1.5s infinite; border-radius:var(--radius-sm); }
@keyframes shimmer { 0%{background-position:-200% 0;} 100%{background-position:200% 0;} }
.empty-state { text-align:center; padding:3rem 1rem; color:var(--gray-light); }
.empty-state .icon { font-size:4rem; margin-bottom:1rem; }
.empty-state h3 { color:var(--white); margin-bottom:.5rem; }