* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    background: #f5f6f8;
    color: #333;
}

.navbar {
    background: #1f2937;
    color: #fff;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 56px;
}

.navbar a {
    color: #fff;
    text-decoration: none;
}

.navbar .brand {
    font-size: 1.25rem;
    font-weight: 600;
}

.nav-links a {
    margin-left: 1.25rem;
    opacity: 0.9;
}

.nav-links a:hover {
    opacity: 1;
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

h1, h2, h3 {
    color: #111827;
}

.card, .stat-card, .login-box {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    padding: 1.5rem;
}

.login-box {
    max-width: 400px;
    margin: 4rem auto;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    background: #6b7280;
    color: #fff;
    text-decoration: none;
    cursor: pointer;
    font-size: 0.95rem;
}

.btn-primary {
    background: #2563eb;
}

.btn-danger {
    background: #dc2626;
}

.btn-small {
    padding: 0.25rem 0.6rem;
    font-size: 0.85rem;
}

.inline-form {
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.inline {
    display: inline;
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

th, td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

th {
    background: #f9fafb;
    font-weight: 600;
}

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

.stat-card .big {
    font-size: 2rem;
    font-weight: 700;
    margin: 0.5rem 0 0;
    color: #2563eb;
}

.badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-active, .badge-sent, .badge-delivered {
    background: #d1fae5;
    color: #065f46;
}

.badge-pending, .badge-queued {
    background: #fef3c7;
    color: #92400e;
}

.badge-qr_ready, .badge-sending {
    background: #dbeafe;
    color: #1e40af;
}

.badge-expired, .badge-failed, .badge-disabled {
    background: #fee2e2;
    color: #991b1b;
}

.qr-image {
    max-width: 300px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
}

.message-text {
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.actions {
    display: flex;
    gap: 0.5rem;
}

.hero {
    text-align: center;
    padding: 4rem 1rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.hero ul {
    list-style: none;
    padding: 0;
}

.hero li {
    display: inline-block;
    margin: 0.5rem;
}

.hero a {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: #2563eb;
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
}

.hero a:hover {
    background: #1d4ed8;
}