:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #10b981;
    --danger: #ef4444;
    --border: #334155;
    --radius: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Inter', sans-serif; }

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

.app-container {
    width: 100%;
    max-width: 1000px;
    padding: 2rem;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.logo { display: flex; align-items: center; gap: 1rem; }
.logo-icon { width: 32px; height: 32px; background: linear-gradient(135deg, var(--accent), var(--success)); border-radius: 8px; }

h1 { font-size: 1.5rem; font-weight: 600; }

.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
}

.btn.primary { background-color: var(--accent); color: white; box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.3); }
.btn.primary:hover { background-color: var(--accent-hover); transform: translateY(-1px); }
.btn.secondary { background-color: transparent; border: 1px solid var(--border); color: var(--text-secondary); }
.btn.secondary:hover { background-color: var(--card-bg); color: var(--text-primary); }
.btn.danger { background-color: rgba(239, 68, 68, 0.1); color: var(--danger); }
.btn.danger:hover { background-color: rgba(239, 68, 68, 0.2); }

/* Stats */
.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.card {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.card h3 { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0.5rem; font-weight: 500; }
.card p { font-size: 2rem; font-weight: 700; }

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

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

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 1rem 1.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background-color: rgba(255, 255, 255, 0.02);
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

tr:last-child td { border-bottom: none; }
tr:hover { background-color: rgba(255, 255, 255, 0.02); }

/* Status Badge */
.badge {
    padding: 0.25rem 0.6rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}
.badge.valid { background-color: rgba(16, 185, 129, 0.15); color: var(--success); }
.badge.expired { background-color: rgba(239, 68, 68, 0.15); color: var(--danger); }
.badge.inactive { background-color: rgba(148, 163, 184, 0.15); color: var(--text-secondary); }

/* Modal */
.modal {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 1;
    transition: opacity 0.2s;
    z-index: 100;
}

.modal.hidden { opacity: 0; pointer-events: none; }

.modal-content {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: var(--radius);
    width: 100%;
    max-width: 450px;
    border: 1px solid var(--border);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
}

.modal-header { display: flex; justify-content: space-between; margin-bottom: 1.5rem; }
.close-modal { font-size: 1.5rem; cursor: pointer; color: var(--text-secondary); }

.form-group { margin-bottom: 1.2rem; }
.form-group label { display: block; margin-bottom: 0.5rem; color: var(--text-secondary); font-size: 0.9rem; }
.form-group input {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-color);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: white;
    outline: none;
}
.form-group input:focus { border-color: var(--accent); }

.modal-actions { display: flex; justify-content: flex-end; gap: 0.8rem; margin-top: 2rem; }