:root {
    --primary: #128C7E;
    --primary-dark: #075E54;
    --bg: #ece5dd;
    --card-bg: #ffffff;
    --text: #303030;
    --error: #d32f2f;
    --success: #388e3c;
    --border: #ddd;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--card-bg);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--border);
    padding-bottom: 20px;
    margin-bottom: 20px;
}

h1, h2, h3 {
    color: var(--primary-dark);
    margin-top: 0;
}

.nav-controls {
    display: flex;
    gap: 10px;
}
.nav-btn {
    background: #e0e0e0;
    color: #333;
    padding: 8px 12px;
    font-size: 0.9em;
    width: auto;
}
.nav-btn.active {
    background: var(--primary);
    color: white;
}

.badge {
    padding: 8px 12px;
    border-radius: 20px;
    font-size: 0.9em;
    font-weight: bold;
    background: #ffa000;
    color: white;
}
.badge.connected { background: var(--success); }
.badge.disconnected { background: var(--error); }

.status-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

#qr-section {
    text-align: center;
    margin-bottom: 30px;
}

#qr-image {
    max-width: 250px;
    border: 1px solid var(--border);
    padding: 10px;
    border-radius: 10px;
}

.input-method-selector {
    background: #f5f5f5;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    gap: 20px;
    justify-content: center;
}
.input-method-selector label {
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
}

.form-layout {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}
.form-col {
    flex: 1;
    background: #fafafa;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border);
}

@media (max-width: 768px) {
    .form-layout {
        flex-direction: column;
    }
}

.form-group {
    margin-bottom: 15px;
}
.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}
.form-group input, .form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 5px;
    box-sizing: border-box;
}
.form-group textarea {
    resize: vertical;
}
.form-group small {
    color: #666;
    display: block;
    margin-top: 4px;
}

button {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    font-weight: bold;
    width: 100%;
    transition: 0.2s;
}
button:hover:not(:disabled) {
    background: var(--primary-dark);
}
button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.btn-danger {
    background: var(--error);
    width: auto;
}
.btn-danger:hover:not(:disabled) {
    background: #b71c1c;
}

.error {
    color: var(--error);
    margin-top: 10px;
    font-weight: bold;
    text-align: center;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}
th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
th {
    background: #f5f5f5;
}
.status-sent { color: var(--primary); }
.status-delivered { color: #1976D2; font-weight:bold; }
.status-read { color: #2196F3; font-weight:bold; }
.status-error { color: var(--error); }
.status-skip { color: #f57c00; }

/* Login Box */
.login-box {
    max-width: 400px;
    margin: 40px auto;
    padding: 30px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: #fafafa;
}
.login-box h2 {
    text-align: center;
}