:root {
    --primary: #165DFF;
    --primary-hover: #4080ff;
    --secondary: #36CFC9;
    --bg-white: #FFFFFF;
    --bg-gray: #F5F7FA;
    --border: #E5E6EB;
    --text-secondary: #86909C;
    --text-primary: #1D2129;
    --success: #00B42A;
    --warning: #FF7D00;
    --danger: #F53F3F;
    --disabled: #F2F3F5;
    --shadow: 0 2px 8px rgba(0,0,0,0.05);
    --radius: 8px;
    --radius-sm: 6px;
    --radius-tag: 12px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Inter', 'Roboto', 'Arial', sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--bg-gray);
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}
.btn-primary:hover { background: var(--primary-hover); text-decoration: none; }
.btn-primary:disabled { background: var(--disabled); color: var(--text-secondary); cursor: not-allowed; }

.btn-secondary {
    background: #fff;
    color: var(--primary);
    border: 1px solid var(--primary);
}
.btn-secondary:hover { background: var(--bg-gray); text-decoration: none; }

.btn-text {
    background: none;
    color: var(--primary);
    padding: 8px 12px;
}
.btn-text:hover { background: var(--bg-gray); text-decoration: none; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #d93636; }

.card {
    background: var(--bg-white);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 16px;
}

.input {
    width: 100%;
    padding: 10px 12px;
    font-size: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: #fff;
    transition: border-color 0.2s;
}
.input:focus { outline: none; border-color: var(--primary); }
.input:disabled { background: var(--bg-gray); cursor: not-allowed; }

.textarea {
    width: 100%;
    padding: 12px;
    font-size: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: #fff;
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
}
.textarea:focus { outline: none; border-color: var(--primary); }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 500; color: var(--text-primary); }
.form-group .hint { font-size: 12px; color: var(--text-secondary); margin-top: 4px; }
.form-error { color: var(--danger); font-size: 12px; margin-top: 4px; display: none; }
.form-group.error .input { border-color: var(--danger); }
.form-group.error .form-error { display: block; }

.status-tag {
    display: inline-block;
    padding: 4px 10px;
    font-size: 12px;
    border-radius: var(--radius-tag);
}
.status-pending { background: #FFF7E6; color: var(--warning); }
.status-approved { background: #E6FFFB; color: var(--success); }
.status-rejected { background: #FFF1F0; color: var(--danger); }
.status-paid { background: #E6FFFB; color: #009A29; }
.status-disabled { background: var(--disabled); color: var(--text-secondary); }

.divider { height: 1px; background: var(--border); margin: 24px 0; }

.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-secondary { color: var(--text-secondary); }
.text-primary { color: var(--text-primary); }

.font-bold { font-weight: 700; }
.font-medium { font-weight: 600; }

.text-center { text-align: center; }
.text-right { text-align: right; }

.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }

.loading {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 2px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}
.empty-state svg { width: 64px; height: 64px; stroke: var(--text-secondary); margin-bottom: 16px; }

.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--danger);
    color: #fff;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    z-index: 9999;
    animation: fadeIn 0.3s;
}
@keyframes fadeIn { from { opacity: 0; transform: translateX(-50%) translateY(-10px); } to { opacity: 1; transform: translateX(-50%) translateY(0); } }

.checkbox-group { display: flex; gap: 16px; }
.checkbox-item { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.checkbox-item input[type="checkbox"] { width: 16px; height: 16px; cursor: pointer; }

.pagination { display: flex; justify-content: center; align-items: center; gap: 8px; margin-top: 24px; }
.pagination a, .pagination span {
    padding: 8px 14px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
}
.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination .active { background: var(--primary); color: #fff; border-color: var(--primary); }

@media (max-width: 768px) {
    .container { padding: 0 16px; }
    .hide-mobile { display: none !important; }
}

@media (min-width: 769px) {
    .hide-desktop { display: none !important; }
}