/* Premium Modern CSS for Serial Management */
:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --bg-input: #334155;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #0ea5e9;
    --radius: 12px;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--info));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
}

.brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Dashboard Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.stat-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 10px 30px -10px rgba(0,0,0,0.5);
}

.stat-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--primary);
    opacity: 0.3;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin-top: 0.5rem;
    display: block;
}

/* Actions Bar */
.actions-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
    background: var(--bg-card);
    padding: 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    align-items: center;
}

.search-form {
    flex: 1;
    display: flex;
    gap: 0.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0.625rem 1.25rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
    color: white;
}

.btn-primary {
    background: var(--primary);
}

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-main);
}

.btn-outline:hover {
    background: var(--border);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.75rem;
}

/* Inputs */
.input {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 0.625rem 1rem;
    border-radius: 8px;
    outline: none;
    transition: var(--transition);
    font-family: inherit;
}

.input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

/* Table */
.table-container {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow);
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th {
    background: rgba(15, 23, 42, 0.5);
    padding: 1rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    font-weight: 600;
}

td {
    padding: 1rem;
    border-top: 1px solid var(--border);
    font-size: 0.875rem;
    vertical-align: middle;
}

tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* Badges */
.badge {
    padding: 4px 10px;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success { background: rgba(34, 197, 94, 0.2); color: #4ade80; }
.badge-warning { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }
.badge-danger { background: rgba(239, 68, 68, 0.2); color: #f87171; }
.badge-info { background: rgba(14, 165, 233, 0.2); color: #38bdf8; }
.badge-secondary { background: rgba(148, 163, 184, 0.2); color: #cbd5e1; }

/* Forms */
.form-card {
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
}

.form-group .input {
    width: 100%;
}

.alert {
    padding: 1rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #f87171;
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.2);
    color: #4ade80;
}

/* Supplier Grid */
.supplier-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
}

.supplier-card {
    background: var(--bg-card);
    padding: 1.25rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    transition: var(--transition);
}

.supplier-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.supplier-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
}

.supplier-count {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
}

/* Low Stock Alerts */
.supplier-low {
    border-color: rgba(239, 68, 68, 0.4);
    background: linear-gradient(to bottom right, var(--bg-card), rgba(239, 68, 68, 0.05));
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.1);
}

.low-stock-alert {
    margin-top: 0.75rem;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
    padding: 4px 10px;
    border-radius: 6px;
    width: fit-content;
}

.alert-pulse {
    width: 6px;
    height: 6px;
    background: var(--danger);
    border-radius: 50%;
    animation: pulse-red 2s infinite;
}

@keyframes pulse-red {
	0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }
	70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(239, 68, 68, 0); }
	100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

/* Responsive */
@media (max-width: 768px) {
    .container { padding: 1rem; }
    header { flex-direction: column; gap: 1rem; text-align: center; }
    .actions-bar { flex-direction: column; align-items: stretch; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .supplier-grid { grid-template-columns: 1fr 1fr; }
}